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v8 specifc gluegen related changes

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commit ba4a560492b001ea8e6f9983ef7ffa5ecd0a8683 1 parent d85cb7b
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1,212 deps/event.h
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+/*
+ * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef _EVENT_H_
+#define _EVENT_H_
+
+/** @mainpage
+
+ @section intro Introduction
+
+ libevent is an event notification library for developing scalable network
+ servers. The libevent API provides a mechanism to execute a callback
+ function when a specific event occurs on a file descriptor or after a
+ timeout has been reached. Furthermore, libevent also support callbacks due
+ to signals or regular timeouts.
+
+ libevent is meant to replace the event loop found in event driven network
+ servers. An application just needs to call event_dispatch() and then add or
+ remove events dynamically without having to change the event loop.
+
+ Currently, libevent supports /dev/poll, kqueue(2), select(2), poll(2) and
+ epoll(4). It also has experimental support for real-time signals. The
+ internal event mechanism is completely independent of the exposed event API,
+ and a simple update of libevent can provide new functionality without having
+ to redesign the applications. As a result, Libevent allows for portable
+ application development and provides the most scalable event notification
+ mechanism available on an operating system. Libevent can also be used for
+ multi-threaded aplications; see Steven Grimm's explanation. Libevent should
+ compile on Linux, *BSD, Mac OS X, Solaris and Windows.
+
+ @section usage Standard usage
+
+ Every program that uses libevent must include the <event.h> header, and pass
+ the -levent flag to the linker. Before using any of the functions in the
+ library, you must call event_init() or event_base_new() to perform one-time
+ initialization of the libevent library.
+
+ @section event Event notification
+
+ For each file descriptor that you wish to monitor, you must declare an event
+ structure and call event_set() to initialize the members of the structure.
+ To enable notification, you add the structure to the list of monitored
+ events by calling event_add(). The event structure must remain allocated as
+ long as it is active, so it should be allocated on the heap. Finally, you
+ call event_dispatch() to loop and dispatch events.
+
+ @section bufferevent I/O Buffers
+
+ libevent provides an abstraction on top of the regular event callbacks. This
+ abstraction is called a buffered event. A buffered event provides input and
+ output buffers that get filled and drained automatically. The user of a
+ buffered event no longer deals directly with the I/O, but instead is reading
+ from input and writing to output buffers.
+
+ Once initialized via bufferevent_new(), the bufferevent structure can be
+ used repeatedly with bufferevent_enable() and bufferevent_disable().
+ Instead of reading and writing directly to a socket, you would call
+ bufferevent_read() and bufferevent_write().
+
+ When read enabled the bufferevent will try to read from the file descriptor
+ and call the read callback. The write callback is executed whenever the
+ output buffer is drained below the write low watermark, which is 0 by
+ default.
+
+ @section timers Timers
+
+ libevent can also be used to create timers that invoke a callback after a
+ certain amount of time has expired. The evtimer_set() function prepares an
+ event struct to be used as a timer. To activate the timer, call
+ evtimer_add(). Timers can be deactivated by calling evtimer_del().
+
+ @section timeouts Timeouts
+
+ In addition to simple timers, libevent can assign timeout events to file
+ descriptors that are triggered whenever a certain amount of time has passed
+ with no activity on a file descriptor. The timeout_set() function
+ initializes an event struct for use as a timeout. Once initialized, the
+ event must be activated by using timeout_add(). To cancel the timeout, call
+ timeout_del().
+
+ @section evdns Asynchronous DNS resolution
+
+ libevent provides an asynchronous DNS resolver that should be used instead
+ of the standard DNS resolver functions. These functions can be imported by
+ including the <evdns.h> header in your program. Before using any of the
+ resolver functions, you must call evdns_init() to initialize the library. To
+ convert a hostname to an IP address, you call the evdns_resolve_ipv4()
+ function. To perform a reverse lookup, you would call the
+ evdns_resolve_reverse() function. All of these functions use callbacks to
+ avoid blocking while the lookup is performed.
+
+ @section evhttp Event-driven HTTP servers
+
+ libevent provides a very simple event-driven HTTP server that can be
+ embedded in your program and used to service HTTP requests.
+
+ To use this capability, you need to include the <evhttp.h> header in your
+ program. You create the server by calling evhttp_new(). Add addresses and
+ ports to listen on with evhttp_bind_socket(). You then register one or more
+ callbacks to handle incoming requests. Each URI can be assigned a callback
+ via the evhttp_set_cb() function. A generic callback function can also be
+ registered via evhttp_set_gencb(); this callback will be invoked if no other
+ callbacks have been registered for a given URI.
+
+ @section evrpc A framework for RPC servers and clients
+
+ libevents provides a framework for creating RPC servers and clients. It
+ takes care of marshaling and unmarshaling all data structures.
+
+ @section api API Reference
+
+ To browse the complete documentation of the libevent API, click on any of
+ the following links.
+
+ event.h
+ The primary libevent header
+
+ evdns.h
+ Asynchronous DNS resolution
+
+ evhttp.h
+ An embedded libevent-based HTTP server
+
+ evrpc.h
+ A framework for creating RPC servers and clients
+
+ */
+
+/** @file event.h
+
+ A library for writing event-driven network servers
+
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <event-config.h>
+#ifdef _EVENT_HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef _EVENT_HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef _EVENT_HAVE_STDINT_H
+#include <stdint.h>
+#endif
+#include <stdarg.h>
+
+/* For int types. */
+#include <evutil.h>
+
+#ifdef WIN32
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#undef WIN32_LEAN_AND_MEAN
+typedef unsigned char u_char;
+typedef unsigned short u_short;
+#endif
+
+#define EVLIST_TIMEOUT 0x01
+#define EVLIST_INSERTED 0x02
+#define EVLIST_SIGNAL 0x04
+#define EVLIST_ACTIVE 0x08
+#define EVLIST_INTERNAL 0x10
+#define EVLIST_INIT 0x80
+
+/* EVLIST_X_ Private space: 0x1000-0xf000 */
+#define EVLIST_ALL (0xf000 | 0x9f)
+
+#define EV_TIMEOUT 0x01
+#define EV_READ 0x02
+#define EV_WRITE 0x04
+#define EV_SIGNAL 0x08
+#define EV_PERSIST 0x10 /* Persistant event */
+
+/* Fix so that ppl dont have to run with <sys/queue.h> */
+#ifndef TAILQ_ENTRY
+#define _EVENT_DEFINED_TQENTRY
+#define TAILQ_ENTRY(type) \
+struct { \
+ struct type *tqe_next; /* next element */ \
+ struct type **tqe_prev; /* address of previous next element */ \
+}
+#endif /* !TAILQ_ENTRY */
+
+struct event_base;
+#ifndef EVENT_NO_STRUCT
+struct event {
+ TAILQ_ENTRY (event) ev_next;
+ TAILQ_ENTRY (event) ev_active_next;
+ TAILQ_ENTRY (event) ev_signal_next;
+ unsigned int min_heap_idx; /* for managing timeouts */
+
+ struct event_base *ev_base;
+
+ int ev_fd;
+ short ev_events;
+ short ev_ncalls;
+ short *ev_pncalls; /* Allows deletes in callback */
+
+ struct timeval ev_timeout;
+
+ int ev_pri; /* smaller numbers are higher priority */
+
+ void (*ev_callback)(int, short, void *arg);
+ void *ev_arg;
+
+ int ev_res; /* result passed to event callback */
+ int ev_flags;
+};
+#else
+struct event;
+#endif
+
+#define EVENT_SIGNAL(ev) (int)(ev)->ev_fd
+#define EVENT_FD(ev) (int)(ev)->ev_fd
+
+/*
+ * Key-Value pairs. Can be used for HTTP headers but also for
+ * query argument parsing.
+ */
+struct evkeyval {
+ TAILQ_ENTRY(evkeyval) next;
+
+ char *key;
+ char *value;
+};
+
+#ifdef _EVENT_DEFINED_TQENTRY
+#undef TAILQ_ENTRY
+struct event_list;
+struct evkeyvalq;
+#undef _EVENT_DEFINED_TQENTRY
+#else
+TAILQ_HEAD (event_list, event);
+TAILQ_HEAD (evkeyvalq, evkeyval);
+#endif /* _EVENT_DEFINED_TQENTRY */
+
+/**
+ Initialize the event API.
+
+ Use event_base_new() to initialize a new event base, but does not set
+ the current_base global. If using only event_base_new(), each event
+ added must have an event base set with event_base_set()
+
+ @see event_base_set(), event_base_free(), event_init()
+ */
+struct event_base *event_base_new(void);
+
+/**
+ Initialize the event API.
+
+ The event API needs to be initialized with event_init() before it can be
+ used. Sets the current_base global representing the default base for
+ events that have no base associated with them.
+
+ @see event_base_set(), event_base_new()
+ */
+struct event_base *event_init(void);
+
+/**
+ Reinitialized the event base after a fork
+
+ Some event mechanisms do not survive across fork. The event base needs
+ to be reinitialized with the event_reinit() function.
+
+ @param base the event base that needs to be re-initialized
+ @return 0 if successful, or -1 if some events could not be re-added.
+ @see event_base_new(), event_init()
+*/
+int event_reinit(struct event_base *base);
+
+/**
+ Loop to process events.
+
+ In order to process events, an application needs to call
+ event_dispatch(). This function only returns on error, and should
+ replace the event core of the application program.
+
+ @see event_base_dispatch()
+ */
+int event_dispatch(void);
+
+
+/**
+ Threadsafe event dispatching loop.
+
+ @param eb the event_base structure returned by event_init()
+ @see event_init(), event_dispatch()
+ */
+int event_base_dispatch(struct event_base *);
+
+
+/**
+ Get the kernel event notification mechanism used by libevent.
+
+ @param eb the event_base structure returned by event_base_new()
+ @return a string identifying the kernel event mechanism (kqueue, epoll, etc.)
+ */
+const char *event_base_get_method(struct event_base *);
+
+
+/**
+ Deallocate all memory associated with an event_base, and free the base.
+
+ Note that this function will not close any fds or free any memory passed
+ to event_set as the argument to callback.
+
+ @param eb an event_base to be freed
+ */
+void event_base_free(struct event_base *);
+
+
+#define _EVENT_LOG_DEBUG 0
+#define _EVENT_LOG_MSG 1
+#define _EVENT_LOG_WARN 2
+#define _EVENT_LOG_ERR 3
+typedef void (*event_log_cb)(int severity, const char *msg);
+/**
+ Redirect libevent's log messages.
+
+ @param cb a function taking two arguments: an integer severity between
+ _EVENT_LOG_DEBUG and _EVENT_LOG_ERR, and a string. If cb is NULL,
+ then the default log is used.
+ */
+void event_set_log_callback(event_log_cb cb);
+
+/**
+ Associate a different event base with an event.
+
+ @param eb the event base
+ @param ev the event
+ */
+int event_base_set(struct event_base *, struct event *);
+
+/**
+ event_loop() flags
+ */
+/*@{*/
+#define EVLOOP_ONCE 0x01 /**< Block at most once. */
+#define EVLOOP_NONBLOCK 0x02 /**< Do not block. */
+/*@}*/
+
+/**
+ Handle events.
+
+ This is a more flexible version of event_dispatch().
+
+ @param flags any combination of EVLOOP_ONCE | EVLOOP_NONBLOCK
+ @return 0 if successful, -1 if an error occurred, or 1 if no events were
+ registered.
+ @see event_loopexit(), event_base_loop()
+*/
+int event_loop(int);
+
+/**
+ Handle events (threadsafe version).
+
+ This is a more flexible version of event_base_dispatch().
+
+ @param eb the event_base structure returned by event_init()
+ @param flags any combination of EVLOOP_ONCE | EVLOOP_NONBLOCK
+ @return 0 if successful, -1 if an error occurred, or 1 if no events were
+ registered.
+ @see event_loopexit(), event_base_loop()
+ */
+int event_base_loop(struct event_base *, int);
+
+/**
+ Exit the event loop after the specified time.
+
+ The next event_loop() iteration after the given timer expires will
+ complete normally (handling all queued events) then exit without
+ blocking for events again.
+
+ Subsequent invocations of event_loop() will proceed normally.
+
+ @param tv the amount of time after which the loop should terminate.
+ @return 0 if successful, or -1 if an error occurred
+ @see event_loop(), event_base_loop(), event_base_loopexit()
+ */
+int event_loopexit(const struct timeval *);
+
+
+/**
+ Exit the event loop after the specified time (threadsafe variant).
+
+ The next event_base_loop() iteration after the given timer expires will
+ complete normally (handling all queued events) then exit without
+ blocking for events again.
+
+ Subsequent invocations of event_base_loop() will proceed normally.
+
+ @param eb the event_base structure returned by event_init()
+ @param tv the amount of time after which the loop should terminate.
+ @return 0 if successful, or -1 if an error occurred
+ @see event_loopexit()
+ */
+int event_base_loopexit(struct event_base *, const struct timeval *);
+
+/**
+ Abort the active event_loop() immediately.
+
+ event_loop() will abort the loop after the next event is completed;
+ event_loopbreak() is typically invoked from this event's callback.
+ This behavior is analogous to the "break;" statement.
+
+ Subsequent invocations of event_loop() will proceed normally.
+
+ @return 0 if successful, or -1 if an error occurred
+ @see event_base_loopbreak(), event_loopexit()
+ */
+int event_loopbreak(void);
+
+/**
+ Abort the active event_base_loop() immediately.
+
+ event_base_loop() will abort the loop after the next event is completed;
+ event_base_loopbreak() is typically invoked from this event's callback.
+ This behavior is analogous to the "break;" statement.
+
+ Subsequent invocations of event_loop() will proceed normally.
+
+ @param eb the event_base structure returned by event_init()
+ @return 0 if successful, or -1 if an error occurred
+ @see event_base_loopexit
+ */
+int event_base_loopbreak(struct event_base *);
+
+
+/**
+ Add a timer event.
+
+ @param ev the event struct
+ @param tv timeval struct
+ */
+#define evtimer_add(ev, tv) event_add(ev, tv)
+
+
+/**
+ Define a timer event.
+
+ @param ev event struct to be modified
+ @param cb callback function
+ @param arg argument that will be passed to the callback function
+ */
+#define evtimer_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
+
+
+/**
+ * Delete a timer event.
+ *
+ * @param ev the event struct to be disabled
+ */
+#define evtimer_del(ev) event_del(ev)
+#define evtimer_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
+#define evtimer_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
+
+/**
+ * Add a timeout event.
+ *
+ * @param ev the event struct to be disabled
+ * @param tv the timeout value, in seconds
+ */
+#define timeout_add(ev, tv) event_add(ev, tv)
+
+
+/**
+ * Define a timeout event.
+ *
+ * @param ev the event struct to be defined
+ * @param cb the callback to be invoked when the timeout expires
+ * @param arg the argument to be passed to the callback
+ */
+#define timeout_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
+
+
+/**
+ * Disable a timeout event.
+ *
+ * @param ev the timeout event to be disabled
+ */
+#define timeout_del(ev) event_del(ev)
+
+#define timeout_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
+#define timeout_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
+
+#define signal_add(ev, tv) event_add(ev, tv)
+#define signal_set(ev, x, cb, arg) \
+ event_set(ev, x, EV_SIGNAL|EV_PERSIST, cb, arg)
+#define signal_del(ev) event_del(ev)
+#define signal_pending(ev, tv) event_pending(ev, EV_SIGNAL, tv)
+#define signal_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
+
+/**
+ Prepare an event structure to be added.
+
+ The function event_set() prepares the event structure ev to be used in
+ future calls to event_add() and event_del(). The event will be prepared to
+ call the function specified by the fn argument with an int argument
+ indicating the file descriptor, a short argument indicating the type of
+ event, and a void * argument given in the arg argument. The fd indicates
+ the file descriptor that should be monitored for events. The events can be
+ either EV_READ, EV_WRITE, or both. Indicating that an application can read
+ or write from the file descriptor respectively without blocking.
+
+ The function fn will be called with the file descriptor that triggered the
+ event and the type of event which will be either EV_TIMEOUT, EV_SIGNAL,
+ EV_READ, or EV_WRITE. The additional flag EV_PERSIST makes an event_add()
+ persistent until event_del() has been called.
+
+ @param ev an event struct to be modified
+ @param fd the file descriptor to be monitored
+ @param event desired events to monitor; can be EV_READ and/or EV_WRITE
+ @param fn callback function to be invoked when the event occurs
+ @param arg an argument to be passed to the callback function
+
+ @see event_add(), event_del(), event_once()
+
+ */
+void event_set(struct event *, int, short, void (*)(int, short, void *), void *);
+
+/**
+ Schedule a one-time event to occur.
+
+ The function event_once() is similar to event_set(). However, it schedules
+ a callback to be called exactly once and does not require the caller to
+ prepare an event structure.
+
+ @param fd a file descriptor to monitor
+ @param events event(s) to monitor; can be any of EV_TIMEOUT | EV_READ |
+ EV_WRITE
+ @param callback callback function to be invoked when the event occurs
+ @param arg an argument to be passed to the callback function
+ @param timeout the maximum amount of time to wait for the event, or NULL
+ to wait forever
+ @return 0 if successful, or -1 if an error occurred
+ @see event_set()
+
+ */
+int event_once(int, short, void (*)(int, short, void *), void *,
+ const struct timeval *);
+
+
+/**
+ Schedule a one-time event (threadsafe variant)
+
+ The function event_base_once() is similar to event_set(). However, it
+ schedules a callback to be called exactly once and does not require the
+ caller to prepare an event structure.
+
+ @param base an event_base returned by event_init()
+ @param fd a file descriptor to monitor
+ @param events event(s) to monitor; can be any of EV_TIMEOUT | EV_READ |
+ EV_WRITE
+ @param callback callback function to be invoked when the event occurs
+ @param arg an argument to be passed to the callback function
+ @param timeout the maximum amount of time to wait for the event, or NULL
+ to wait forever
+ @return 0 if successful, or -1 if an error occurred
+ @see event_once()
+ */
+int event_base_once(struct event_base *base, int fd, short events,
+ void (*callback)(int, short, void *), void *arg,
+ const struct timeval *timeout);
+
+
+/**
+ Add an event to the set of monitored events.
+
+ The function event_add() schedules the execution of the ev event when the
+ event specified in event_set() occurs or in at least the time specified in
+ the tv. If tv is NULL, no timeout occurs and the function will only be
+ called if a matching event occurs on the file descriptor. The event in the
+ ev argument must be already initialized by event_set() and may not be used
+ in calls to event_set() until it has timed out or been removed with
+ event_del(). If the event in the ev argument already has a scheduled
+ timeout, the old timeout will be replaced by the new one.
+
+ @param ev an event struct initialized via event_set()
+ @param timeout the maximum amount of time to wait for the event, or NULL
+ to wait forever
+ @return 0 if successful, or -1 if an error occurred
+ @see event_del(), event_set()
+ */
+int event_add(struct event *ev, const struct timeval *timeout);
+
+
+/**
+ Remove an event from the set of monitored events.
+
+ The function event_del() will cancel the event in the argument ev. If the
+ event has already executed or has never been added the call will have no
+ effect.
+
+ @param ev an event struct to be removed from the working set
+ @return 0 if successful, or -1 if an error occurred
+ @see event_add()
+ */
+int event_del(struct event *);
+
+void event_active(struct event *, int, short);
+
+
+/**
+ Checks if a specific event is pending or scheduled.
+
+ @param ev an event struct previously passed to event_add()
+ @param event the requested event type; any of EV_TIMEOUT|EV_READ|
+ EV_WRITE|EV_SIGNAL
+ @param tv an alternate timeout (FIXME - is this true?)
+
+ @return 1 if the event is pending, or 0 if the event has not occurred
+
+ */
+int event_pending(struct event *ev, short event, struct timeval *tv);
+
+
+/**
+ Test if an event structure has been initialized.
+
+ The event_initialized() macro can be used to check if an event has been
+ initialized.
+
+ @param ev an event structure to be tested
+ @return 1 if the structure has been initialized, or 0 if it has not been
+ initialized
+ */
+#ifdef WIN32
+#define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT && (ev)->ev_fd != (int)INVALID_HANDLE_VALUE)
+#else
+#define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
+#endif
+
+
+/**
+ Get the libevent version number.
+
+ @return a string containing the version number of libevent
+ */
+const char *event_get_version(void);
+
+
+/**
+ Get the kernel event notification mechanism used by libevent.
+
+ @return a string identifying the kernel event mechanism (kqueue, epoll, etc.)
+ */
+const char *event_get_method(void);
+
+
+/**
+ Set the number of different event priorities.
+
+ By default libevent schedules all active events with the same priority.
+ However, some time it is desirable to process some events with a higher
+ priority than others. For that reason, libevent supports strict priority
+ queues. Active events with a lower priority are always processed before
+ events with a higher priority.
+
+ The number of different priorities can be set initially with the
+ event_priority_init() function. This function should be called before the
+ first call to event_dispatch(). The event_priority_set() function can be
+ used to assign a priority to an event. By default, libevent assigns the
+ middle priority to all events unless their priority is explicitly set.
+
+ @param npriorities the maximum number of priorities
+ @return 0 if successful, or -1 if an error occurred
+ @see event_base_priority_init(), event_priority_set()
+
+ */
+int event_priority_init(int);
+
+
+/**
+ Set the number of different event priorities (threadsafe variant).
+
+ See the description of event_priority_init() for more information.
+
+ @param eb the event_base structure returned by event_init()
+ @param npriorities the maximum number of priorities
+ @return 0 if successful, or -1 if an error occurred
+ @see event_priority_init(), event_priority_set()
+ */
+int event_base_priority_init(struct event_base *, int);
+
+
+/**
+ Assign a priority to an event.
+
+ @param ev an event struct
+ @param priority the new priority to be assigned
+ @return 0 if successful, or -1 if an error occurred
+ @see event_priority_init()
+ */
+int event_priority_set(struct event *, int);
+
+
+/* These functions deal with buffering input and output */
+
+struct evbuffer {
+ u_char *buffer;
+ u_char *orig_buffer;
+
+ size_t misalign;
+ size_t totallen;
+ size_t off;
+
+ void (*cb)(struct evbuffer *, size_t, size_t, void *);
+ void *cbarg;
+};
+
+/* Just for error reporting - use other constants otherwise */
+#define EVBUFFER_READ 0x01
+#define EVBUFFER_WRITE 0x02
+#define EVBUFFER_EOF 0x10
+#define EVBUFFER_ERROR 0x20
+#define EVBUFFER_TIMEOUT 0x40
+
+struct bufferevent;
+typedef void (*evbuffercb)(struct bufferevent *, void *);
+typedef void (*everrorcb)(struct bufferevent *, short what, void *);
+
+struct event_watermark {
+ size_t low;
+ size_t high;
+};
+
+#ifndef EVENT_NO_STRUCT
+struct bufferevent {
+ struct event_base *ev_base;
+
+ struct event ev_read;
+ struct event ev_write;
+
+ struct evbuffer *input;
+ struct evbuffer *output;
+
+ struct event_watermark wm_read;
+ struct event_watermark wm_write;
+
+ evbuffercb readcb;
+ evbuffercb writecb;
+ everrorcb errorcb;
+ void *cbarg;
+
+ int timeout_read; /* in seconds */
+ int timeout_write; /* in seconds */
+
+ short enabled; /* events that are currently enabled */
+};
+#endif
+
+/**
+ Create a new bufferevent.
+
+ libevent provides an abstraction on top of the regular event callbacks.
+ This abstraction is called a buffered event. A buffered event provides
+ input and output buffers that get filled and drained automatically. The
+ user of a buffered event no longer deals directly with the I/O, but
+ instead is reading from input and writing to output buffers.
+
+ Once initialized, the bufferevent structure can be used repeatedly with
+ bufferevent_enable() and bufferevent_disable().
+
+ When read enabled the bufferevent will try to read from the file descriptor
+ and call the read callback. The write callback is executed whenever the
+ output buffer is drained below the write low watermark, which is 0 by
+ default.
+
+ If multiple bases are in use, bufferevent_base_set() must be called before
+ enabling the bufferevent for the first time.
+
+ @param fd the file descriptor from which data is read and written to.
+ This file descriptor is not allowed to be a pipe(2).
+ @param readcb callback to invoke when there is data to be read, or NULL if
+ no callback is desired
+ @param writecb callback to invoke when the file descriptor is ready for
+ writing, or NULL if no callback is desired
+ @param errorcb callback to invoke when there is an error on the file
+ descriptor
+ @param cbarg an argument that will be supplied to each of the callbacks
+ (readcb, writecb, and errorcb)
+ @return a pointer to a newly allocated bufferevent struct, or NULL if an
+ error occurred
+ @see bufferevent_base_set(), bufferevent_free()
+ */
+struct bufferevent *bufferevent_new(int fd,
+ evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
+
+
+/**
+ Assign a bufferevent to a specific event_base.
+
+ @param base an event_base returned by event_init()
+ @param bufev a bufferevent struct returned by bufferevent_new()
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_new()
+ */
+int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev);
+
+
+/**
+ Assign a priority to a bufferevent.
+
+ @param bufev a bufferevent struct
+ @param pri the priority to be assigned
+ @return 0 if successful, or -1 if an error occurred
+ */
+int bufferevent_priority_set(struct bufferevent *bufev, int pri);
+
+
+/**
+ Deallocate the storage associated with a bufferevent structure.
+
+ @param bufev the bufferevent structure to be freed.
+ */
+void bufferevent_free(struct bufferevent *bufev);
+
+
+/**
+ Changes the callbacks for a bufferevent.
+
+ @param bufev the bufferevent object for which to change callbacks
+ @param readcb callback to invoke when there is data to be read, or NULL if
+ no callback is desired
+ @param writecb callback to invoke when the file descriptor is ready for
+ writing, or NULL if no callback is desired
+ @param errorcb callback to invoke when there is an error on the file
+ descriptor
+ @param cbarg an argument that will be supplied to each of the callbacks
+ (readcb, writecb, and errorcb)
+ @see bufferevent_new()
+ */
+void bufferevent_setcb(struct bufferevent *bufev,
+ evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
+
+/**
+ Changes the file descriptor on which the bufferevent operates.
+
+ @param bufev the bufferevent object for which to change the file descriptor
+ @param fd the file descriptor to operate on
+*/
+void bufferevent_setfd(struct bufferevent *bufev, int fd);
+
+/**
+ Write data to a bufferevent buffer.
+
+ The bufferevent_write() function can be used to write data to the file
+ descriptor. The data is appended to the output buffer and written to the
+ descriptor automatically as it becomes available for writing.
+
+ @param bufev the bufferevent to be written to
+ @param data a pointer to the data to be written
+ @param size the length of the data, in bytes
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_write_buffer()
+ */
+int bufferevent_write(struct bufferevent *bufev,
+ const void *data, size_t size);
+
+
+/**
+ Write data from an evbuffer to a bufferevent buffer. The evbuffer is
+ being drained as a result.
+
+ @param bufev the bufferevent to be written to
+ @param buf the evbuffer to be written
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_write()
+ */
+int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf);
+
+
+/**
+ Read data from a bufferevent buffer.
+
+ The bufferevent_read() function is used to read data from the input buffer.
+
+ @param bufev the bufferevent to be read from
+ @param data pointer to a buffer that will store the data
+ @param size the size of the data buffer, in bytes
+ @return the amount of data read, in bytes.
+ */
+size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size);
+
+/**
+ Enable a bufferevent.
+
+ @param bufev the bufferevent to be enabled
+ @param event any combination of EV_READ | EV_WRITE.
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_disable()
+ */
+int bufferevent_enable(struct bufferevent *bufev, short event);
+
+
+/**
+ Disable a bufferevent.
+
+ @param bufev the bufferevent to be disabled
+ @param event any combination of EV_READ | EV_WRITE.
+ @return 0 if successful, or -1 if an error occurred
+ @see bufferevent_enable()
+ */
+int bufferevent_disable(struct bufferevent *bufev, short event);
+
+
+/**
+ Set the read and write timeout for a buffered event.
+
+ @param bufev the bufferevent to be modified
+ @param timeout_read the read timeout
+ @param timeout_write the write timeout
+ */
+void bufferevent_settimeout(struct bufferevent *bufev,
+ int timeout_read, int timeout_write);
+
+
+/**
+ Sets the watermarks for read and write events.
+
+ On input, a bufferevent does not invoke the user read callback unless
+ there is at least low watermark data in the buffer. If the read buffer
+ is beyond the high watermark, the buffevent stops reading from the network.
+
+ On output, the user write callback is invoked whenever the buffered data
+ falls below the low watermark.
+
+ @param bufev the bufferevent to be modified
+ @param events EV_READ, EV_WRITE or both
+ @param lowmark the lower watermark to set
+ @param highmark the high watermark to set
+*/
+
+void bufferevent_setwatermark(struct bufferevent *bufev, short events,
+ size_t lowmark, size_t highmark);
+
+#define EVBUFFER_LENGTH(x) (x)->off
+#define EVBUFFER_DATA(x) (x)->buffer
+#define EVBUFFER_INPUT(x) (x)->input
+#define EVBUFFER_OUTPUT(x) (x)->output
+
+
+/**
+ Allocate storage for a new evbuffer.
+
+ @return a pointer to a newly allocated evbuffer struct, or NULL if an error
+ occurred
+ */
+struct evbuffer *evbuffer_new(void);
+
+
+/**
+ Deallocate storage for an evbuffer.
+
+ @param pointer to the evbuffer to be freed
+ */
+void evbuffer_free(struct evbuffer *);
+
+
+/**
+ Expands the available space in an event buffer.
+
+ Expands the available space in the event buffer to at least datlen
+
+ @param buf the event buffer to be expanded
+ @param datlen the new minimum length requirement
+ @return 0 if successful, or -1 if an error occurred
+*/
+int evbuffer_expand(struct evbuffer *, size_t);
+
+
+/**
+ Append data to the end of an evbuffer.
+
+ @param buf the event buffer to be appended to
+ @param data pointer to the beginning of the data buffer
+ @param datlen the number of bytes to be copied from the data buffer
+ */
+int evbuffer_add(struct evbuffer *, const void *, size_t);
+
+
+
+/**
+ Read data from an event buffer and drain the bytes read.
+
+ @param buf the event buffer to be read from
+ @param data the destination buffer to store the result
+ @param datlen the maximum size of the destination buffer
+ @return the number of bytes read
+ */
+int evbuffer_remove(struct evbuffer *, void *, size_t);
+
+
+/**
+ * Read a single line from an event buffer.
+ *
+ * Reads a line terminated by either '\r\n', '\n\r' or '\r' or '\n'.
+ * The returned buffer needs to be freed by the caller.
+ *
+ * @param buffer the evbuffer to read from
+ * @return pointer to a single line, or NULL if an error occurred
+ */
+char *evbuffer_readline(struct evbuffer *);
+
+
+/** Used to tell evbuffer_readln what kind of line-ending to look for.
+ */
+enum evbuffer_eol_style {
+ /** Any sequence of CR and LF characters is acceptable as an EOL. */
+ EVBUFFER_EOL_ANY,
+ /** An EOL is an LF, optionally preceded by a CR. This style is
+ * most useful for implementing text-based internet protocols. */
+ EVBUFFER_EOL_CRLF,
+ /** An EOL is a CR followed by an LF. */
+ EVBUFFER_EOL_CRLF_STRICT,
+ /** An EOL is a LF. */
+ EVBUFFER_EOL_LF
+};
+
+/**
+ * Read a single line from an event buffer.
+ *
+ * Reads a line terminated by an EOL as determined by the evbuffer_eol_style
+ * argument. Returns a newly allocated nul-terminated string; the caller must
+ * free the returned value. The EOL is not included in the returned string.
+ *
+ * @param buffer the evbuffer to read from
+ * @param n_read_out if non-NULL, points to a size_t that is set to the
+ * number of characters in the returned string. This is useful for
+ * strings that can contain NUL characters.
+ * @param eol_style the style of line-ending to use.
+ * @return pointer to a single line, or NULL if an error occurred
+ */
+char *evbuffer_readln(struct evbuffer *buffer, size_t *n_read_out,
+ enum evbuffer_eol_style eol_style);
+
+
+/**
+ Move data from one evbuffer into another evbuffer.
+
+ This is a destructive add. The data from one buffer moves into
+ the other buffer. The destination buffer is expanded as needed.
+
+ @param outbuf the output buffer
+ @param inbuf the input buffer
+ @return 0 if successful, or -1 if an error occurred
+ */
+int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *);
+
+
+/**
+ Append a formatted string to the end of an evbuffer.
+
+ @param buf the evbuffer that will be appended to
+ @param fmt a format string
+ @param ... arguments that will be passed to printf(3)
+ @return The number of bytes added if successful, or -1 if an error occurred.
+ */
+int evbuffer_add_printf(struct evbuffer *, const char *fmt, ...)
+#ifdef __GNUC__
+ __attribute__((format(printf, 2, 3)))
+#endif
+;
+
+
+/**
+ Append a va_list formatted string to the end of an evbuffer.
+
+ @param buf the evbuffer that will be appended to
+ @param fmt a format string
+ @param ap a varargs va_list argument array that will be passed to vprintf(3)
+ @return The number of bytes added if successful, or -1 if an error occurred.
+ */
+int evbuffer_add_vprintf(struct evbuffer *, const char *fmt, va_list ap);
+
+
+/**
+ Remove a specified number of bytes data from the beginning of an evbuffer.
+
+ @param buf the evbuffer to be drained
+ @param len the number of bytes to drain from the beginning of the buffer
+ */
+void evbuffer_drain(struct evbuffer *, size_t);
+
+
+/**
+ Write the contents of an evbuffer to a file descriptor.
+
+ The evbuffer will be drained after the bytes have been successfully written.
+
+ @param buffer the evbuffer to be written and drained
+ @param fd the file descriptor to be written to
+ @return the number of bytes written, or -1 if an error occurred
+ @see evbuffer_read()
+ */
+int evbuffer_write(struct evbuffer *, int);
+
+
+/**
+ Read from a file descriptor and store the result in an evbuffer.
+
+ @param buf the evbuffer to store the result
+ @param fd the file descriptor to read from
+ @param howmuch the number of bytes to be read
+ @return the number of bytes read, or -1 if an error occurred
+ @see evbuffer_write()
+ */
+int evbuffer_read(struct evbuffer *, int, int);
+
+
+/**
+ Find a string within an evbuffer.
+
+ @param buffer the evbuffer to be searched
+ @param what the string to be searched for
+ @param len the length of the search string
+ @return a pointer to the beginning of the search string, or NULL if the search failed.
+ */
+u_char *evbuffer_find(struct evbuffer *, const u_char *, size_t);
+
+/**
+ Set a callback to invoke when the evbuffer is modified.
+
+ @param buffer the evbuffer to be monitored
+ @param cb the callback function to invoke when the evbuffer is modified
+ @param cbarg an argument to be provided to the callback function
+ */
+void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *);
+
+/*
+ * Marshaling tagged data - We assume that all tags are inserted in their
+ * numeric order - so that unknown tags will always be higher than the
+ * known ones - and we can just ignore the end of an event buffer.
+ */
+
+void evtag_init(void);
+
+void evtag_marshal(struct evbuffer *evbuf, ev_uint32_t tag, const void *data,
+ ev_uint32_t len);
+
+/**
+ Encode an integer and store it in an evbuffer.
+
+ We encode integer's by nibbles; the first nibble contains the number
+ of significant nibbles - 1; this allows us to encode up to 64-bit
+ integers. This function is byte-order independent.
+
+ @param evbuf evbuffer to store the encoded number
+ @param number a 32-bit integer
+ */
+void encode_int(struct evbuffer *evbuf, ev_uint32_t number);
+
+void evtag_marshal_int(struct evbuffer *evbuf, ev_uint32_t tag,
+ ev_uint32_t integer);
+
+void evtag_marshal_string(struct evbuffer *buf, ev_uint32_t tag,
+ const char *string);
+
+void evtag_marshal_timeval(struct evbuffer *evbuf, ev_uint32_t tag,
+ struct timeval *tv);
+
+int evtag_unmarshal(struct evbuffer *src, ev_uint32_t *ptag,
+ struct evbuffer *dst);
+int evtag_peek(struct evbuffer *evbuf, ev_uint32_t *ptag);
+int evtag_peek_length(struct evbuffer *evbuf, ev_uint32_t *plength);
+int evtag_payload_length(struct evbuffer *evbuf, ev_uint32_t *plength);
+int evtag_consume(struct evbuffer *evbuf);
+
+int evtag_unmarshal_int(struct evbuffer *evbuf, ev_uint32_t need_tag,
+ ev_uint32_t *pinteger);
+
+int evtag_unmarshal_fixed(struct evbuffer *src, ev_uint32_t need_tag,
+ void *data, size_t len);
+
+int evtag_unmarshal_string(struct evbuffer *evbuf, ev_uint32_t need_tag,
+ char **pstring);
+
+int evtag_unmarshal_timeval(struct evbuffer *evbuf, ev_uint32_t need_tag,
+ struct timeval *ptv);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _EVENT_H_ */
View
231 deps/libevent-1.4/ChangeLog
@@ -0,0 +1,231 @@
+Changes in 1.4.14b-stable
+ o Set the VERSION_INFO correctly for 1.4.14
+
+Changes in 1.4.14-stable
+ o Add a .gitignore file for the 1.4 branch. (d014edb)
+ o Backport evbuffer_readln(). (b04cc60 Nicholas Marriott)
+ o Make the evbuffer_readln backport follow the current API (c545485)
+ o Valgrind fix: Clear struct kevent before checking for OSX bug. (5713d5d William Ahern)
+ o Fix a crash when reading badly formatted resolve.conf (5b10d00 Yasuoka Masahiko)
+ o Fix memory-leak of signal handler array with kqueue. [backport] (01f3775)
+ o Update sample/signal-test.c to use newer APIs and not leak. (891765c Evan Jones)
+ o Correct all versions in 1.4 branch (ac0d213)
+ o Make evutil_make_socket_nonblocking() leave any other flags alone. (81c26ba Jardel Weyrich)
+ o Adjusted fcntl() retval comparison on evutil_make_socket_nonblocking(). (5f2e250 Jardel Weyrich)
+ o Correct a debug message in evhttp_parse_request_line (35df59e)
+ o Merge branch 'readln-backport' into patches-1.4 (8771d5b)
+ o Do not send an HTTP error when we've already closed or responded. (4fd2dd9 Pavel Plesov)
+ o Re-add event_siglcb; some old code _was_ still using it. :( (bd03d06)
+ o Make Libevent 1.4 build on win32 with Unicode enabled. (bce58d6 Brodie Thiesfield)
+ o Distribute nmake makefile for 1.4 (20d706d)
+ o do not fail while sending on http connections the client closed. (5c8b446)
+ o make evhttp_send() safe against terminated connections, too (01ea0c5)
+ o Fix a free(NULL) in min_heap.h (2458934)
+ o Fix memory leak when setting up priorities; reported by Alexander Drozdov (cb1a722)
+ o Clean up properly when adding a signal handler fails. (ae6ece0 Gilad Benjamini)
+ o Do not abort HTTP requests missing a reason string. (29d7b32 Pierre Phaneuf)
+ o Fix compile warning in http.c (906d573)
+ o Define _REENTRANT as needed on Solaris, elsewhere (6cbea13)
+
+
+Changes in 1.4.13-stable:
+ o If the kernel tells us that there are a negative number of bytes to read from a socket, do not believe it. Fixes bug 2841177; found by Alexander Pronchenkov.
+ o Do not allocate the maximum event queue and fd array for the epoll backend at startup. Instead, start out accepting 32 events at a time, and double the queue's size when it seems that the OS is generating events faster than we're requesting them. Saves up to 512K per epoll-based event_base. Resolves bug 2839240.
+ o Fix compilation on Android, which forgot to define fd_mask in its sys/select.h
+ o Do not drop data from evbuffer when out of memory; reported by Jacek Masiulaniec
+ o Rename our replacement compat/sys/_time.h header to avoid build a conflict on HPUX; reported by Kathryn Hogg.
+ o Build kqueue.c correctly on GNU/kFreeBSD platforms. Patch pulled upstream from Debian.
+ o Fix a problem with excessive memory allocation when using multiple event priorities.
+ o When running set[ug]id, don't check the environment. Based on a patch from OpenBSD.
+
+
+Changes in 1.4.12-stable:
+ o Try to contain degree of failure when running on a win32 version so heavily firewalled that we can't fake a socketpair.
+ o Fix an obscure timing-dependent, allocator-dependent crash in the evdns code.
+ o Use __VA_ARGS__ syntax for varargs macros in event_rpcgen when compiler is not GCC.
+ o Activate fd events in a pseudorandom order with O(N) backends, so that we don't systematically favor low fds (select) or earlier-added fds (poll, win32).
+ o Fix another pair of fencepost bugs in epoll.c. [Patch from Adam Langley.]
+ o Do not break evdns connections to nameservers when our IP changes.
+ o Set truncated flag correctly in evdns server replies.
+ o Disable strict aliasing with GCC: our code is not compliant with it.
+
+Changes in 1.4.11-stable:
+ o Fix a bug when removing a timeout from the heap. [Patch from Marko Kreen]
+ o Remove the limit on size of HTTP headers by removing static buffers.
+ o Fix a nasty dangling pointer bug in epoll.c that could occur after epoll_recalc(). [Patch from Kevin Springborn]
+ o Distribute Win32-Code/event-config.h, not ./event-config.h
+
+Changes in 1.4.10-stable:
+ o clean up buffered http connection data on reset; reported by Brian O'Kelley
+ o bug fix and potential race condition in signal handling; from Alexander Drozdov
+ o rename the Solaris event ports backend to evport
+ o support compilation on Haiku
+ o fix signal processing when a signal callback delivers a signal; from Alexander Drozdov
+ o const-ify some arguments to evdns functions.
+ o off-by-one error in epoll_recalc; reported by Victor Goya
+ o include Doxyfile in tar ball; from Jeff Garzik
+ o correctly parse queries with encoded \r, \n or + characters
+
+Changes in 1.4.9-stable:
+ o event_add would not return error for some backends; from Dean McNamee
+ o Clear the timer cache on entering the event loop; reported by Victor Chang
+ o Only bind the socket on connect when a local address has been provided; reported by Alejo Sanchez
+ o Allow setting of local port for evhttp connections to support millions of connections from a single system; from Richard Jones.
+ o Clear the timer cache when leaving the event loop; reported by Robin Haberkorn
+ o Fix a typo in setting the global event base; reported by lance.
+ o Fix a memory leak when reading multi-line headers
+ o Fix a memory leak by not running explicit close detection for server connections
+
+Changes in 1.4.8-stable:
+ o Match the query in DNS replies to the query in the request; from Vsevolod Stakhov.
+ o Fix a merge problem in which name_from_addr returned pointers to the stack; found by Jiang Hong.
+ o Do not remove Accept-Encoding header
+
+Changes in 1.4.7-stable:
+ o Fix a bug where headers arriving in multiple packets were not parsed; fix from Jiang Hong; test by me.
+
+Changes in 1.4.6-stable:
+ o evutil.h now includes <stdarg.h> directly
+ o switch all uses of [v]snprintf over to evutil
+ o Correct handling of trailing headers in chunked replies; from Scott Lamb.
+ o Support multi-line HTTP headers; based on a patch from Moshe Litvin
+ o Reject negative Content-Length headers; anonymous bug report
+ o Detect CLOCK_MONOTONIC at runtime for evdns; anonymous bug report
+ o Fix a bug where deleting signals with the kqueue backend would cause subsequent adds to fail
+ o Support multiple events listening on the same signal; make signals regular events that go on the same event queue; problem report by Alexander Drozdov.
+ o Deal with evbuffer_read() returning -1 on EINTR|EAGAIN; from Adam Langley.
+ o Fix a bug in which the DNS server would incorrectly set the type of a cname reply to a.
+ o Fix a bug where setting the timeout on a bufferevent would take not effect if the event was already pending.
+ o Fix a memory leak when using signals for some event bases; reported by Alexander Drozdov.
+ o Add libevent.vcproj file to distribution to help with Windows build.
+ o Fix a problem with epoll() and reinit; problem report by Alexander Drozdov.
+ o Fix off-by-one errors in devpoll; from Ian Bell
+ o Make event_add not change any state if it fails; reported by Ian Bell.
+ o Do not warn on accept when errno is either EAGAIN or EINTR
+
+Changes in 1.4.5-stable:
+ o Fix connection keep-alive behavior for HTTP/1.0
+ o Fix use of freed memory in event_reinit; pointed out by Peter Postma
+ o Constify struct timeval * where possible; pointed out by Forest Wilkinson
+ o allow min_heap_erase to be called on removed members; from liusifan.
+ o Rename INPUT and OUTPUT to EVRPC_INPUT and EVRPC_OUTPUT. Retain INPUT/OUTPUT aliases on on-win32 platforms for backwards compatibility.
+ o Do not use SO_REUSEADDR when connecting
+ o Fix Windows build
+ o Fix a bug in event_rpcgen when generated fixed-sized entries
+
+Changes in 1.4.4-stable:
+ o Correct the documentation on buffer printf functions.
+ o Don't warn on unimplemented epoll_create(): this isn't a problem, just a reason to fall back to poll or select.
+ o Correctly handle timeouts larger than 35 minutes on Linux with epoll.c. This is probably a kernel defect, but we'll have to support old kernels anyway even if it gets fixed.
+ o Fix a potential stack corruption bug in tagging on 64-bit CPUs.
+ o expose bufferevent_setwatermark via header files and fix high watermark on read
+ o fix a bug in bufferevent read water marks and add a test for them
+ o introduce bufferevent_setcb and bufferevent_setfd to allow better manipulation of bufferevents
+ o use libevent's internal timercmp on all platforms, to avoid bugs on old platforms where timercmp(a,b,<=) is buggy.
+ o reduce system calls for getting current time by caching it.
+ o fix evhttp_bind_socket() so that multiple sockets can be bound by the same http server.
+ o Build test directory correctly with CPPFLAGS set.
+ o Fix build under Visual C++ 2005.
+ o Expose evhttp_accept_socket() API.
+ o Merge windows gettimeofday() replacement into a new evutil_gettimeofday() function.
+ o Fix autoconf script behavior on IRIX.
+ o Make sure winsock2.h include always comes before windows.h include.
+
+Changes in 1.4.3-stable:
+ o include Content-Length in reply for HTTP/1.0 requests with keep-alive
+ o Patch from Tani Hosokawa: make some functions in http.c threadsafe.
+ o Do not free the kqop file descriptor in other processes, also allow it to be 0; from Andrei Nigmatulin
+ o make event_rpcgen.py generate code include event-config.h; reported by Sam Banks.
+ o make event methods static so that they are not exported; from Andrei Nigmatulin
+ o make RPC replies use application/octet-stream as mime type
+ o do not delete uninitialized timeout event in evdns
+
+Changes in 1.4.2-rc:
+ o remove pending timeouts on event_base_free()
+ o also check EAGAIN for Solaris' event ports; from W.C.A. Wijngaards
+ o devpoll and evport need reinit; tested by W.C.A Wijngaards
+ o event_base_get_method; from Springande Ulv
+ o Send CRLF after each chunk in HTTP output, for compliance with RFC2626. Patch from "propanbutan". Fixes bug 1894184.
+ o Add a int64_t parsing function, with unit tests, so we can apply Scott Lamb's fix to allow large HTTP values.
+ o Use a 64-bit field to hold HTTP content-lengths. Patch from Scott Lamb.
+ o Allow regression code to build even without Python installed
+ o remove NDEBUG ifdefs from evdns.c
+ o update documentation of event_loop and event_base_loop; from Tani Hosokawa.
+ o detect integer types properly on platforms without stdint.h
+ o Remove "AM_MAINTAINER_MODE" declaration in configure.in: now makefiles and configure should get re-generated automatically when Makefile.am or configure.in chanes.
+ o do not insert event into list when evsel->add fails
+
+Changes in 1.4.1-beta:
+ o free minheap on event_base_free(); from Christopher Layne
+ o debug cleanups in signal.c; from Christopher Layne
+ o provide event_base_new() that does not set the current_base global
+ o bufferevent_write now uses a const source argument; report from Charles Kerr
+ o better documentation for event_base_loopexit; from Scott Lamb.
+ o Make kqueue have the same behavior as other backends when a signal is caught between event_add() and event_loop(). Previously, it would catch and ignore such signals.
+ o Make kqueue restore signal handlers correctly when event_del() is called.
+ o provide event_reinit() to reintialize an event_base after fork
+ o small improvements to evhttp documentation
+ o always generate Date and Content-Length headers for HTTP/1.1 replies
+ o set the correct event base for HTTP close events
+ o New function, event_{base_}loopbreak. Like event_loopexit, it makes an event loop stop executing and return. Unlike event_loopexit, it keeps subsequent pending events from getting executed. Patch from Scott Lamb
+ o Removed obsoleted recalc code
+ o pull setters/getters out of RPC structures into a base class to which we just need to store a pointer; this reduces the memory footprint of these structures.
+ o fix a bug with event_rpcgen for integers
+ o move EV_PERSIST handling out of the event backends
+ o support for 32-bit tag numbers in rpc structures; this is wire compatible, but changes the API slightly.
+ o prefix {encode,decode}_tag functions with evtag to avoid collisions
+ o Correctly handle DNS replies with no answers set (Fixes bug 1846282)
+ o The configure script now takes an --enable-gcc-warnigns option that turns on many optional gcc warnings. (Nick has been building with these for a while, but they might be useful to other developers.)
+ o When building with GCC, use the "format" attribute to verify type correctness of calls to printf-like functions.
+ o removed linger from http server socket; reported by Ilya Martynov
+ o allow \r or \n individually to separate HTTP headers instead of the standard "\r\n"; from Charles Kerr.
+ o demote most http warnings to debug messages
+ o Fix Solaris compilation; from Magne Mahre
+ o Add a "Date" header to HTTP responses, as required by HTTP 1.1.
+ o Support specifying the local address of an evhttp_connection using set_local_address
+ o Fix a memory leak in which failed HTTP connections would not free the request object
+ o Make adding of array members in event_rpcgen more efficient, but doubling memory allocation
+ o Fix a memory leak in the DNS server
+ o Fix compilation when DNS_USE_OPENSSL_FOR_ID is enabled
+ o Fix buffer size and string generation in evdns_resolve_reverse_ipv6().
+ o Respond to nonstandard DNS queries with "NOTIMPL" rather than by ignoring them.
+ o In DNS responses, the CD flag should be preserved, not the TC flag.
+ o Fix http.c to compile properly with USE_DEBUG; from Christopher Layne
+ o Handle NULL timeouts correctly on Solaris; from Trond Norbye
+ o Recalculate pending events properly when reallocating event array on Solaris; from Trond Norbye
+ o Add Doxygen documentation to header files; from Mark Heily
+ o Add a evdns_set_transaction_id_fn() function to override the default
+ transaction ID generation code.
+ o Add an evutil module (with header evutil.h) to implement our standard cross-platform hacks, on the theory that somebody else would like to use them too.
+ o Fix signals implementation on windows.
+ o Fix http module on windows to close sockets properly.
+ o Make autogen.sh script run correctly on systems where /bin/sh isn't bash. (Patch from Trond Norbye, rewritten by Hagne Mahre and then Hannah Schroeter.)
+ o Skip calling gettime() in timeout_process if we are not in fact waiting for any events. (Patch from Trond Norbye)
+ o Make test subdirectory compile under mingw.
+ o Fix win32 buffer.c behavior so that it is correct for sockets (which do not like ReadFile and WriteFile).
+ o Make the test.sh script run unit tests for the evpoll method.
+ o Make the entire evdns.h header enclosed in "extern C" as appropriate.
+ o Fix implementation of strsep on platforms that lack it
+ o Fix implementation of getaddrinfo on platforms that lack it; mainly, this will make Windows http.c work better. Original patch by Lubomir Marinov.
+ o Fix evport implementation: port_disassociate called on unassociated events resulting in bogus errors; more efficient memory management; from Trond Norbye and Prakash Sangappa
+ o support for hooks on rpc input and output; can be used to implement rpc independent processing such as compression or authentication.
+ o use a min heap instead of a red-black tree for timeouts; as a result finding the min is a O(1) operation now; from Maxim Yegorushkin
+ o associate an event base with an rpc pool
+ o added two additional libraries: libevent_core and libevent_extra in addition to the regular libevent. libevent_core contains only the event core whereas libevent_extra contains dns, http and rpc support
+ o Begin using libtool's library versioning support correctly. If we don't mess up, this will more or less guarantee binaries linked against old versions of libevent continue working when we make changes to libevent that do not break backward compatibility.
+ o Fix evhttp.h compilation when TAILQ_ENTRY is not defined.
+ o Small code cleanups in epoll_dispatch().
+ o Increase the maximum number of addresses read from a packet in evdns to 32.
+ o Remove support for the rtsig method: it hasn't compiled for a while, and nobody seems to miss it very much. Let us know if there's a good reason to put it back in.
+ o Rename the "class" field in evdns_server_request to dns_question_class, so that it won't break compilation under C++. Use a macro so that old code won't break. Mark the macro as deprecated.
+ o Fix DNS unit tests so that having a DNS server with broken IPv6 support is no longer cause for aborting the unit tests.
+ o Make event_base_free() succeed even if there are pending non-internal events on a base. This may still leak memory and fds, but at least it no longer crashes.
+ o Post-process the config.h file into a new, installed event-config.h file that we can install, and whose macros will be safe to include in header files.
+ o Remove the long-deprecated acconfig.h file.
+ o Do not require #include <sys/types.h> before #include <event.h>.
+ o Add new evutil_timer* functions to wrap (or replace) the regular timeval manipulation functions.
+ o Fix many build issues when using the Microsoft C compiler.
+ o Remove a bash-ism in autogen.sh
+ o When calling event_del on a signal, restore the signal handler's previous value rather than setting it to SIG_DFL. Patch from Christopher Layne.
+ o Make the logic for active events work better with internal events; patch from Christopher Layne.
+ o We do not need to specially remove a timeout before calling event_del; patch from Christopher Layne.
View
230 deps/libevent-1.4/Doxyfile
@@ -0,0 +1,230 @@
+# Doxyfile 1.5.1
+
+# This file describes the settings to be used by the documentation system
+# doxygen (www.doxygen.org) for a project
+#
+# All text after a hash (#) is considered a comment and will be ignored
+# The format is:
+# TAG = value [value, ...]
+# For lists items can also be appended using:
+# TAG += value [value, ...]
+# Values that contain spaces should be placed between quotes (" ")
+
+#---------------------------------------------------------------------------
+# Project related configuration options
+#---------------------------------------------------------------------------
+
+# The PROJECT_NAME tag is a single word (or a sequence of words surrounded
+# by quotes) that should identify the project.
+
+PROJECT_NAME = libevent
+
+# Place all output under 'doxygen/'
+
+OUTPUT_DIRECTORY = doxygen/
+
+# If the JAVADOC_AUTOBRIEF tag is set to YES then Doxygen
+# will interpret the first line (until the first dot) of a JavaDoc-style
+# comment as the brief description. If set to NO, the JavaDoc
+# comments will behave just like the Qt-style comments (thus requiring an
+# explicit @brief command for a brief description.
+
+JAVADOC_AUTOBRIEF = YES
+
+# Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C
+# sources only. Doxygen will then generate output that is more tailored for C.
+# For instance, some of the names that are used will be different. The list
+# of all members will be omitted, etc.
+
+OPTIMIZE_OUTPUT_FOR_C = YES
+
+# If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the
+# brief documentation of file, namespace and class members alphabetically
+# by member name. If set to NO (the default) the members will appear in
+# declaration order.
+
+SORT_BRIEF_DOCS = YES
+
+#---------------------------------------------------------------------------
+# configuration options related to the input files
+#---------------------------------------------------------------------------
+
+# The INPUT tag can be used to specify the files and/or directories that contain
+# documented source files. You may enter file names like "myfile.cpp" or
+# directories like "/usr/src/myproject". Separate the files or directories
+# with spaces.
+
+INPUT = event.h evdns.h evhttp.h evrpc.h
+
+#---------------------------------------------------------------------------
+# configuration options related to the HTML output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_HTML tag is set to YES (the default) Doxygen will
+# generate HTML output.
+
+GENERATE_HTML = YES
+
+#---------------------------------------------------------------------------
+# configuration options related to the LaTeX output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_LATEX tag is set to YES (the default) Doxygen will
+# generate Latex output.
+
+GENERATE_LATEX = YES
+
+# The LATEX_OUTPUT tag is used to specify where the LaTeX docs will be put.
+# If a relative path is entered the value of OUTPUT_DIRECTORY will be
+# put in front of it. If left blank `latex' will be used as the default path.
+
+LATEX_OUTPUT = latex
+
+# The LATEX_CMD_NAME tag can be used to specify the LaTeX command name to be
+# invoked. If left blank `latex' will be used as the default command name.
+
+LATEX_CMD_NAME = latex
+
+# The MAKEINDEX_CMD_NAME tag can be used to specify the command name to
+# generate index for LaTeX. If left blank `makeindex' will be used as the
+# default command name.
+
+MAKEINDEX_CMD_NAME = makeindex
+
+# If the COMPACT_LATEX tag is set to YES Doxygen generates more compact
+# LaTeX documents. This may be useful for small projects and may help to
+# save some trees in general.
+
+COMPACT_LATEX = NO
+
+# The PAPER_TYPE tag can be used to set the paper type that is used
+# by the printer. Possible values are: a4, a4wide, letter, legal and
+# executive. If left blank a4wide will be used.
+
+PAPER_TYPE = a4wide
+
+# The EXTRA_PACKAGES tag can be to specify one or more names of LaTeX
+# packages that should be included in the LaTeX output.
+
+EXTRA_PACKAGES =
+
+# The LATEX_HEADER tag can be used to specify a personal LaTeX header for
+# the generated latex document. The header should contain everything until
+# the first chapter. If it is left blank doxygen will generate a
+# standard header. Notice: only use this tag if you know what you are doing!
+
+LATEX_HEADER =
+
+# If the PDF_HYPERLINKS tag is set to YES, the LaTeX that is generated
+# is prepared for conversion to pdf (using ps2pdf). The pdf file will
+# contain links (just like the HTML output) instead of page references
+# This makes the output suitable for online browsing using a pdf viewer.
+
+PDF_HYPERLINKS = NO
+
+# If the USE_PDFLATEX tag is set to YES, pdflatex will be used instead of
+# plain latex in the generated Makefile. Set this option to YES to get a
+# higher quality PDF documentation.
+
+USE_PDFLATEX = NO
+
+# If the LATEX_BATCHMODE tag is set to YES, doxygen will add the \\batchmode.
+# command to the generated LaTeX files. This will instruct LaTeX to keep
+# running if errors occur, instead of asking the user for help.
+# This option is also used when generating formulas in HTML.
+
+LATEX_BATCHMODE = NO
+
+# If LATEX_HIDE_INDICES is set to YES then doxygen will not
+# include the index chapters (such as File Index, Compound Index, etc.)
+# in the output.
+
+LATEX_HIDE_INDICES = NO
+
+#---------------------------------------------------------------------------
+# configuration options related to the man page output
+#---------------------------------------------------------------------------
+
+# If the GENERATE_MAN tag is set to YES (the default) Doxygen will
+# generate man pages
+
+GENERATE_MAN = YES
+
+# The MAN_EXTENSION tag determines the extension that is added to
+# the generated man pages (default is the subroutine's section .3)
+
+MAN_EXTENSION = .3
+
+# If the MAN_LINKS tag is set to YES and Doxygen generates man output,
+# then it will generate one additional man file for each entity
+# documented in the real man page(s). These additional files
+# only source the real man page, but without them the man command
+# would be unable to find the correct page. The default is NO.
+
+MAN_LINKS = YES
+
+#---------------------------------------------------------------------------
+# Configuration options related to the preprocessor
+#---------------------------------------------------------------------------
+
+# If the ENABLE_PREPROCESSING tag is set to YES (the default) Doxygen will
+# evaluate all C-preprocessor directives found in the sources and include
+# files.
+
+ENABLE_PREPROCESSING = YES
+
+# If the MACRO_EXPANSION tag is set to YES Doxygen will expand all macro
+# names in the source code. If set to NO (the default) only conditional
+# compilation will be performed. Macro expansion can be done in a controlled
+# way by setting EXPAND_ONLY_PREDEF to YES.
+
+MACRO_EXPANSION = NO
+
+# If the EXPAND_ONLY_PREDEF and MACRO_EXPANSION tags are both set to YES
+# then the macro expansion is limited to the macros specified with the
+# PREDEFINED and EXPAND_AS_DEFINED tags.
+
+EXPAND_ONLY_PREDEF = NO
+
+# If the SEARCH_INCLUDES tag is set to YES (the default) the includes files
+# in the INCLUDE_PATH (see below) will be search if a #include is found.
+
+SEARCH_INCLUDES = YES
+
+# The INCLUDE_PATH tag can be used to specify one or more directories that
+# contain include files that are not input files but should be processed by
+# the preprocessor.
+
+INCLUDE_PATH =
+
+# You can use the INCLUDE_FILE_PATTERNS tag to specify one or more wildcard
+# patterns (like *.h and *.hpp) to filter out the header-files in the
+# directories. If left blank, the patterns specified with FILE_PATTERNS will
+# be used.
+
+INCLUDE_FILE_PATTERNS =
+
+# The PREDEFINED tag can be used to specify one or more macro names that
+# are defined before the preprocessor is started (similar to the -D option of
+# gcc). The argument of the tag is a list of macros of the form: name
+# or name=definition (no spaces). If the definition and the = are
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+
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+
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+# function macros are typically used for boiler-plate code, and will confuse
+# the parser if not removed.
+
+SKIP_FUNCTION_MACROS = YES
View
148 deps/libevent-1.4/Makefile.am
@@ -0,0 +1,148 @@
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+
+# This is the point release for libevent. It shouldn't include any
+# a/b/c/d/e notations.
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+
+# This is the version info for the libevent binary API. It has three
+# numbers:
+# Current -- the number of the binary API that we're implementing
+# Revision -- which iteration of the implementation of the binary
+# API are we supplying?
+# Age -- How many previous binary API versions do we also
+# support?
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+# binary-compatible with any other version.
+#
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+# 1.4.x series could be potentially binary-compatible with one another,
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+# set VERSION_INFO correctly, or update it as often as we should have.
+# The VERSION_INFO values were:
+# 1.4.0-beta .. 1.4.4-stable : 2:0:0 [See note 1]
+# 1.4.5-stable : 3:0:1 (compatible ABI change)
+# 1.4.6-stable : 3:1:1 (no ABI change)
+# 1.4.7-stable : 3:1:1 [see note 1]
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+# 1.4.9-stable : 3:2:1 [see note 1]
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+# 1.4.14b-stable: : 4:0:2 (compatible ABI change)
+#
+# [1]: Using the same VERSION_INFO value was wrong; we should have been
+# updating the Revision field.
+# [2]: We set the VERSION_INFO completely wrong on 1.4.14b-stable
+
+bin_SCRIPTS = event_rpcgen.py
+
+EXTRA_DIST = autogen.sh event.h event-internal.h log.h evsignal.h evdns.3 \
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+ event.3 \
+ Doxyfile \
+ kqueue.c epoll_sub.c epoll.c select.c poll.c signal.c \
+ evport.c devpoll.c event_rpcgen.py \
+ sample/Makefile.am sample/Makefile.in sample/event-test.c \
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+
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+
+if BUILD_WIN32
+
+SUBDIRS = . sample
+SYS_LIBS = -lws2_32
+SYS_SRC = WIN32-Code/win32.c
+SYS_INCLUDES = -IWIN32-Code
+
+else
+
+SUBDIRS = . sample test
+SYS_LIBS =
+SYS_SRC =
+SYS_INCLUDES =
+
+endif
+
+BUILT_SOURCES = event-config.h
+
+event-config.h: config.h
+ echo '/* event-config.h' > $@
+ echo ' * Generated by autoconf; post-processed by libevent.' >> $@
+ echo ' * Do not edit this file.' >> $@
+ echo ' * Do not rely on macros in this file existing in later versions.'>> $@
+ echo ' */' >> $@
+ echo '#ifndef _EVENT_CONFIG_H_' >> $@
+ echo '#define _EVENT_CONFIG_H_' >> $@
+
+ sed -e 's/#define /#define _EVENT_/' \
+ -e 's/#undef /#undef _EVENT_/' \
+ -e 's/#ifndef /#ifndef _EVENT_/' < config.h >> $@
+ echo "#endif" >> $@
+
+CORE_SRC = event.c buffer.c evbuffer.c log.c evutil.c $(SYS_SRC)
+EXTRA_SRC = event_tagging.c http.c evhttp.h http-internal.h evdns.c \
+ evdns.h evrpc.c evrpc.h evrpc-internal.h \
+ strlcpy.c strlcpy-internal.h strlcpy-internal.h
+
+libevent_la_SOURCES = $(CORE_SRC) $(EXTRA_SRC)
+libevent_la_LIBADD = @LTLIBOBJS@ $(SYS_LIBS)
+libevent_la_LDFLAGS = -release $(RELEASE) -version-info $(VERSION_INFO)
+
+libevent_core_la_SOURCES = $(CORE_SRC)
+libevent_core_la_LIBADD = @LTLIBOBJS@ $(SYS_LIBS)
+libevent_core_la_LDFLAGS = -release $(RELEASE) -version-info $(VERSION_INFO)
+
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+libevent_extra_la_LIBADD = @LTLIBOBJS@ $(SYS_LIBS)
+libevent_extra_la_LDFLAGS = -release $(RELEASE) -version-info $(VERSION_INFO)
+
+include_HEADERS = event.h evhttp.h evdns.h evrpc.h evutil.h
+
+nodist_include_HEADERS = event-config.h
+
+INCLUDES = -I$(srcdir)/compat $(SYS_INCLUDES)
+
+man_MANS = event.3 evdns.3
+
+verify: libevent.la
+ cd test && make verify
+
+doxygen: FORCE
+ doxygen $(srcdir)/Doxyfile
+FORCE:
+
+DISTCLEANFILES = *~ event-config.h
View
1,123 deps/libevent-1.4/Makefile.in
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+ event.3 \
+ Doxyfile \
+ kqueue.c epoll_sub.c epoll.c select.c poll.c signal.c \
+ evport.c devpoll.c event_rpcgen.py \
+ sample/Makefile.am sample/Makefile.in sample/event-test.c \
+ sample/signal-test.c sample/time-test.c \
+ test/Makefile.am test/Makefile.in test/bench.c test/regress.c \
+ test/test-eof.c test/test-weof.c test/test-time.c \
+ test/test-init.c test/test.sh \
+ compat/sys/queue.h compat/sys/_libevent_time.h \
+ WIN32-Code/config.h \
+ WIN32-Code/event-config.h \
+ WIN32-Code/win32.c \
+ WIN32-Code/tree.h \
+ WIN32-Prj/event_test/event_test.dsp \
+ WIN32-Prj/event_test/test.txt WIN32-Prj/libevent.dsp \
+ WIN32-Prj/libevent.dsw WIN32-Prj/signal_test/signal_test.dsp \
+ WIN32-Prj/time_test/time_test.dsp WIN32-Prj/regress/regress.vcproj \
+ WIN32-Prj/libevent.sln WIN32-Prj/libevent.vcproj \
+ Makefile.nmake test/Makefile.nmake
+
+lib_LTLIBRARIES = libevent.la libevent_core.la libevent_extra.la
+@BUILD_WIN32_FALSE@SUBDIRS = . sample test
+@BUILD_WIN32_TRUE@SUBDIRS = . sample
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+@BUILD_WIN32_TRUE@SYS_LIBS = -lws2_32
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+@BUILD_WIN32_TRUE@SYS_INCLUDES = -IWIN32-Code
+BUILT_SOURCES = event-config.h
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+EXTRA_SRC = event_tagging.c http.c evhttp.h http-internal.h evdns.c \
+ evdns.h evrpc.c evrpc.h evrpc-internal.h \
+ strlcpy.c strlcpy-internal.h strlcpy-internal.h
+
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