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/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/* See uv_loop_new for an introduction. */
#ifndef UV_H
#define UV_H
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _WIN32
/* Windows - set up dll import/export decorators. */
# if defined(BUILDING_UV_SHARED)
/* Building shared library. Export everything from c-ares as well. */
# define UV_EXTERN __declspec(dllexport)
# define CARES_BUILDING_LIBRARY 1
# elif defined(USING_UV_SHARED)
/* Using shared library. Use shared c-ares as well. */
# define UV_EXTERN __declspec(dllimport)
# else
/* Building static library. Build c-ares statically as well. */
# define UV_EXTERN /* nothing */
# define CARES_STATICLIB 1
# endif
#else
/* Unix. TODO: symbol hiding */
# define UV_EXTERN /* nothing */
#endif
#define UV_VERSION_MAJOR 0
#define UV_VERSION_MINOR 1
#include <stdint.h> /* int64_t */
#include <sys/types.h> /* size_t */
#include "ares.h"
#ifndef _SSIZE_T_
typedef intptr_t ssize_t;
#endif
#if defined(__unix__) || defined(__POSIX__) || defined(__APPLE__)
# include "uv-private/uv-unix.h"
#else
# include "uv-private/uv-win.h"
#endif
/* Expand this list if necessary. */
typedef enum {
UV_UNKNOWN = -1,
UV_OK = 0,
UV_EOF,
UV_EACCESS,
UV_EAGAIN,
UV_EADDRINUSE,
UV_EADDRNOTAVAIL,
UV_EAFNOSUPPORT,
UV_EALREADY,
UV_EBADF,
UV_EBUSY,
UV_ECONNABORTED,
UV_ECONNREFUSED,
UV_ECONNRESET,
UV_EDESTADDRREQ,
UV_EFAULT,
UV_EHOSTUNREACH,
UV_EINTR,
UV_EINVAL,
UV_EISCONN,
UV_EMFILE,
UV_EMSGSIZE,
UV_ENETDOWN,
UV_ENETUNREACH,
UV_ENFILE,
UV_ENOBUFS,
UV_ENOMEM,
UV_ENOTDIR,
UV_ENONET,
UV_ENOPROTOOPT,
UV_ENOTCONN,
UV_ENOTSOCK,
UV_ENOTSUP,
UV_ENOENT,
UV_ENOSYS,
UV_EPIPE,
UV_EPROTO,
UV_EPROTONOSUPPORT,
UV_EPROTOTYPE,
UV_ETIMEDOUT,
UV_ECHARSET,
UV_EAIFAMNOSUPPORT,
UV_EAINONAME,
UV_EAISERVICE,
UV_EAISOCKTYPE,
UV_ESHUTDOWN,
UV_EEXIST
} uv_err_code;
typedef enum {
UV_UNKNOWN_HANDLE = 0,
UV_TCP,
UV_UDP,
UV_NAMED_PIPE,
UV_TTY,
UV_FILE,
UV_TIMER,
UV_PREPARE,
UV_CHECK,
UV_IDLE,
UV_ASYNC,
UV_ARES_TASK,
UV_ARES_EVENT,
UV_PROCESS,
UV_FS_EVENT
} uv_handle_type;
typedef enum {
UV_UNKNOWN_REQ = 0,
UV_CONNECT,
UV_ACCEPT,
UV_READ,
UV_WRITE,
UV_SHUTDOWN,
UV_WAKEUP,
UV_UDP_SEND,
UV_FS,
UV_WORK,
UV_GETADDRINFO,
UV_REQ_TYPE_PRIVATE
} uv_req_type;
typedef struct uv_loop_s uv_loop_t;
typedef struct uv_ares_task_s uv_ares_task_t;
typedef struct uv_err_s uv_err_t;
typedef struct uv_handle_s uv_handle_t;
typedef struct uv_stream_s uv_stream_t;
typedef struct uv_tcp_s uv_tcp_t;
typedef struct uv_udp_s uv_udp_t;
typedef struct uv_pipe_s uv_pipe_t;
typedef struct uv_tty_s uv_tty_t;
typedef struct uv_timer_s uv_timer_t;
typedef struct uv_prepare_s uv_prepare_t;
typedef struct uv_check_s uv_check_t;
typedef struct uv_idle_s uv_idle_t;
typedef struct uv_async_s uv_async_t;
typedef struct uv_getaddrinfo_s uv_getaddrinfo_t;
typedef struct uv_process_s uv_process_t;
typedef struct uv_counters_s uv_counters_t;
/* Request types */
typedef struct uv_req_s uv_req_t;
typedef struct uv_shutdown_s uv_shutdown_t;
typedef struct uv_write_s uv_write_t;
typedef struct uv_connect_s uv_connect_t;
typedef struct uv_udp_send_s uv_udp_send_t;
typedef struct uv_fs_s uv_fs_t;
/* uv_fs_event_t is a subclass of uv_handle_t. */
typedef struct uv_fs_event_s uv_fs_event_t;
typedef struct uv_work_s uv_work_t;
/*
* This function must be called before any other functions in libuv.
*
* All functions besides uv_run() are non-blocking.
*
* All callbacks in libuv are made asynchronously. That is they are never
* made by the function that takes them as a parameter.
*/
UV_EXTERN uv_loop_t* uv_loop_new();
UV_EXTERN void uv_loop_delete(uv_loop_t*);
/*
* Returns the default loop.
*/
UV_EXTERN uv_loop_t* uv_default_loop();
/*
* This function starts the event loop. It blocks until the reference count
* of the loop drops to zero.
*/
UV_EXTERN int uv_run (uv_loop_t*);
/*
* Manually modify the event loop's reference count. Useful if the user wants
* to have a handle or timeout that doesn't keep the loop alive.
*/
UV_EXTERN void uv_ref(uv_loop_t*);
UV_EXTERN void uv_unref(uv_loop_t*);
UV_EXTERN void uv_update_time(uv_loop_t*);
UV_EXTERN int64_t uv_now(uv_loop_t*);
/*
* The status parameter is 0 if the request completed successfully,
* and should be -1 if the request was cancelled or failed.
* For uv_close_cb, -1 means that the handle was closed due to an error.
* Error details can be obtained by calling uv_last_error().
*
* In the case of uv_read_cb the uv_buf_t returned should be freed by the
* user.
*/
typedef uv_buf_t (*uv_alloc_cb)(uv_handle_t* handle, size_t suggested_size);
typedef void (*uv_read_cb)(uv_stream_t* stream, ssize_t nread, uv_buf_t buf);
/*
* Just like the uv_read_cb except that if the pending parameter is true
* then you can use uv_accept() to pull the new handle into the process.
* If no handle is pending then pending will be UV_UNKNOWN_HANDLE.
*/
typedef void (*uv_read2_cb)(uv_pipe_t* pipe, ssize_t nread, uv_buf_t buf,
uv_handle_type pending);
typedef void (*uv_write_cb)(uv_write_t* req, int status);
typedef void (*uv_connect_cb)(uv_connect_t* req, int status);
typedef void (*uv_shutdown_cb)(uv_shutdown_t* req, int status);
typedef void (*uv_connection_cb)(uv_stream_t* server, int status);
typedef void (*uv_close_cb)(uv_handle_t* handle);
typedef void (*uv_timer_cb)(uv_timer_t* handle, int status);
/* TODO: do these really need a status argument? */
typedef void (*uv_async_cb)(uv_async_t* handle, int status);
typedef void (*uv_prepare_cb)(uv_prepare_t* handle, int status);
typedef void (*uv_check_cb)(uv_check_t* handle, int status);
typedef void (*uv_idle_cb)(uv_idle_t* handle, int status);
typedef void (*uv_getaddrinfo_cb)(uv_getaddrinfo_t* handle, int status,
struct addrinfo* res);
typedef void (*uv_exit_cb)(uv_process_t*, int exit_status, int term_signal);
typedef void (*uv_fs_cb)(uv_fs_t* req);
typedef void (*uv_work_cb)(uv_work_t* req);
typedef void (*uv_after_work_cb)(uv_work_t* req);
/*
* This will be called repeatedly after the uv_fs_event_t is initialized.
* If uv_fs_event_t was initialized with a directory the filename parameter
* will be a relative path to a file contained in the directory.
* The events paramenter is an ORed mask of enum uv_fs_event elements.
*/
typedef void (*uv_fs_event_cb)(uv_fs_event_t* handle, const char* filename,
int events, int status);
typedef enum {
UV_LEAVE_GROUP = 0,
UV_JOIN_GROUP
} uv_membership;
struct uv_err_s {
/* read-only */
uv_err_code code;
/* private */
int sys_errno_;
};
/*
* Most functions return boolean: 0 for success and -1 for failure.
* On error the user should then call uv_last_error() to determine
* the error code.
*/
UV_EXTERN uv_err_t uv_last_error(uv_loop_t*);
UV_EXTERN char* uv_strerror(uv_err_t err);
UV_EXTERN const char* uv_err_name(uv_err_t err);
#define UV_REQ_FIELDS \
/* read-only */ \
uv_req_type type; \
/* public */ \
void* data; \
/* private */ \
UV_REQ_PRIVATE_FIELDS
/* Abstract base class of all requests. */
struct uv_req_s {
UV_REQ_FIELDS
};
/* Platform-specific request types */
UV_PRIVATE_REQ_TYPES
/*
* uv_shutdown_t is a subclass of uv_req_t
*
* Shutdown the outgoing (write) side of a duplex stream. It waits for
* pending write requests to complete. The handle should refer to a
* initialized stream. req should be an uninitalized shutdown request
* struct. The cb is a called after shutdown is complete.
*/
UV_EXTERN int uv_shutdown(uv_shutdown_t* req, uv_stream_t* handle,
uv_shutdown_cb cb);
struct uv_shutdown_s {
UV_REQ_FIELDS
uv_stream_t* handle;
uv_shutdown_cb cb;
UV_SHUTDOWN_PRIVATE_FIELDS
};
#define UV_HANDLE_FIELDS \
/* read-only */ \
uv_loop_t* loop; \
uv_handle_type type; \
/* public */ \
uv_close_cb close_cb; \
void* data; \
/* private */ \
UV_HANDLE_PRIVATE_FIELDS
/* The abstract base class of all handles. */
struct uv_handle_s {
UV_HANDLE_FIELDS
};
/*
* Returns 1 if the prepare/check/idle handle has been started, 0 otherwise.
* For other handle types this always returns 1.
*/
UV_EXTERN int uv_is_active(uv_handle_t* handle);
/*
* Request handle to be closed. close_cb will be called asynchronously after
* this call. This MUST be called on each handle before memory is released.
*
* Note that handles that wrap file descriptors are closed immediately but
* close_cb will still be deferred to the next iteration of the event loop.
* It gives you a chance to free up any resources associated with the handle.
*/
UV_EXTERN void uv_close(uv_handle_t* handle, uv_close_cb close_cb);
/*
* Constructor for uv_buf_t.
* Due to platform differences the user cannot rely on the ordering of the
* base and len members of the uv_buf_t struct. The user is responsible for
* freeing base after the uv_buf_t is done. Return struct passed by value.
*/
UV_EXTERN uv_buf_t uv_buf_init(char* base, size_t len);
#define UV_STREAM_FIELDS \
/* number of bytes queued for writing */ \
size_t write_queue_size; \
uv_alloc_cb alloc_cb; \
uv_read_cb read_cb; \
uv_read2_cb read2_cb; \
/* private */ \
UV_STREAM_PRIVATE_FIELDS
/*
* uv_stream_t is a subclass of uv_handle_t
*
* uv_stream is an abstract class.
*
* uv_stream_t is the parent class of uv_tcp_t, uv_pipe_t, uv_tty_t, and
* soon uv_file_t.
*/
struct uv_stream_s {
UV_HANDLE_FIELDS
UV_STREAM_FIELDS
};
UV_EXTERN int uv_listen(uv_stream_t* stream, int backlog, uv_connection_cb cb);
/*
* This call is used in conjunction with uv_listen() to accept incoming
* connections. Call uv_accept after receiving a uv_connection_cb to accept
* the connection. Before calling uv_accept use uv_*_init() must be
* called on the client. Non-zero return value indicates an error.
*
* When the uv_connection_cb is called it is guaranteed that uv_accept will
* complete successfully the first time. If you attempt to use it more than
* once, it may fail. It is suggested to only call uv_accept once per
* uv_connection_cb call.
*/
UV_EXTERN int uv_accept(uv_stream_t* server, uv_stream_t* client);
/*
* Read data from an incoming stream. The callback will be made several
* several times until there is no more data to read or uv_read_stop is
* called. When we've reached EOF nread will be set to -1 and the error is
* set to UV_EOF. When nread == -1 the buf parameter might not point to a
* valid buffer; in that case buf.len and buf.base are both set to 0.
* Note that nread might also be 0, which does *not* indicate an error or
* eof; it happens when libuv requested a buffer through the alloc callback
* but then decided that it didn't need that buffer.
*/
UV_EXTERN int uv_read_start(uv_stream_t*, uv_alloc_cb alloc_cb,
uv_read_cb read_cb);
UV_EXTERN int uv_read_stop(uv_stream_t*);
/*
* Extended read methods for receiving handles over a pipe. The pipe must be
* initialized with ipc == 1.
*/
UV_EXTERN int uv_read2_start(uv_stream_t*, uv_alloc_cb alloc_cb,
uv_read2_cb read_cb);
/*
* Write data to stream. Buffers are written in order. Example:
*
* uv_buf_t a[] = {
* { .base = "1", .len = 1 },
* { .base = "2", .len = 1 }
* };
*
* uv_buf_t b[] = {
* { .base = "3", .len = 1 },
* { .base = "4", .len = 1 }
* };
*
* // writes "1234"
* uv_write(req, stream, a, 2);
* uv_write(req, stream, b, 2);
*
*/
UV_EXTERN int uv_write(uv_write_t* req, uv_stream_t* handle,
uv_buf_t bufs[], int bufcnt, uv_write_cb cb);
UV_EXTERN int uv_write2(uv_write_t* req, uv_stream_t* handle, uv_buf_t bufs[],
int bufcnt, uv_stream_t* send_handle, uv_write_cb cb);
/* uv_write_t is a subclass of uv_req_t */
struct uv_write_s {
UV_REQ_FIELDS
uv_write_cb cb;
uv_stream_t* send_handle;
uv_stream_t* handle;
UV_WRITE_PRIVATE_FIELDS
};
/*
* uv_tcp_t is a subclass of uv_stream_t
*
* Represents a TCP stream or TCP server.
*/
struct uv_tcp_s {
UV_HANDLE_FIELDS
UV_STREAM_FIELDS
UV_TCP_PRIVATE_FIELDS
};
UV_EXTERN int uv_tcp_init(uv_loop_t*, uv_tcp_t* handle);
/* Enable/disable Nagle's algorithm. */
UV_EXTERN int uv_tcp_nodelay(uv_tcp_t* handle, int enable);
/* Enable/disable TCP keep-alive.
*
* `ms` is the initial delay in seconds, ignored when `enable` is zero.
*/
UV_EXTERN int uv_tcp_keepalive(uv_tcp_t* handle, int enable,
unsigned int delay);
UV_EXTERN int uv_tcp_bind(uv_tcp_t* handle, struct sockaddr_in);
UV_EXTERN int uv_tcp_bind6(uv_tcp_t* handle, struct sockaddr_in6);
UV_EXTERN int uv_tcp_getsockname(uv_tcp_t* handle, struct sockaddr* name,
int* namelen);
UV_EXTERN int uv_tcp_getpeername(uv_tcp_t* handle, struct sockaddr* name,
int* namelen);
/*
* uv_tcp_connect, uv_tcp_connect6
* These functions establish IPv4 and IPv6 TCP connections. Provide an
* initialized TCP handle and an uninitialized uv_connect_t*. The callback
* will be made when the connection is estabished.
*/
UV_EXTERN int uv_tcp_connect(uv_connect_t* req, uv_tcp_t* handle,
struct sockaddr_in address, uv_connect_cb cb);
UV_EXTERN int uv_tcp_connect6(uv_connect_t* req, uv_tcp_t* handle,
struct sockaddr_in6 address, uv_connect_cb cb);
/* uv_connect_t is a subclass of uv_req_t */
struct uv_connect_s {
UV_REQ_FIELDS
uv_connect_cb cb;
uv_stream_t* handle;
UV_CONNECT_PRIVATE_FIELDS
};
/*
* UDP support.
*/
enum uv_udp_flags {
/* Disables dual stack mode. Used with uv_udp_bind6(). */
UV_UDP_IPV6ONLY = 1,
/*
* Indicates message was truncated because read buffer was too small. The
* remainder was discarded by the OS. Used in uv_udp_recv_cb.
*/
UV_UDP_PARTIAL = 2
};
/*
* Called after a uv_udp_send() or uv_udp_send6(). status 0 indicates
* success otherwise error.
*/
typedef void (*uv_udp_send_cb)(uv_udp_send_t* req, int status);
/*
* Callback that is invoked when a new UDP datagram is received.
*
* handle UDP handle.
* nread Number of bytes that have been received.
* 0 if there is no more data to read. You may
* discard or repurpose the read buffer.
* -1 if a transmission error was detected.
* buf uv_buf_t with the received data.
* addr struct sockaddr_in or struct sockaddr_in6.
* Valid for the duration of the callback only.
* flags One or more OR'ed UV_UDP_* constants.
* Right now only UV_UDP_PARTIAL is used.
*/
typedef void (*uv_udp_recv_cb)(uv_udp_t* handle, ssize_t nread, uv_buf_t buf,
struct sockaddr* addr, unsigned flags);
/* uv_udp_t is a subclass of uv_handle_t */
struct uv_udp_s {
UV_HANDLE_FIELDS
UV_UDP_PRIVATE_FIELDS
};
/* uv_udp_send_t is a subclass of uv_req_t */
struct uv_udp_send_s {
UV_REQ_FIELDS
uv_udp_t* handle;
uv_udp_send_cb cb;
UV_UDP_SEND_PRIVATE_FIELDS
};
/*
* Initialize a new UDP handle. The actual socket is created lazily.
* Returns 0 on success.
*/
UV_EXTERN int uv_udp_init(uv_loop_t*, uv_udp_t* handle);
/*
* Bind to a IPv4 address and port.
*
* Arguments:
* handle UDP handle. Should have been initialized with `uv_udp_init`.
* addr struct sockaddr_in with the address and port to bind to.
* flags Unused.
*
* Returns:
* 0 on success, -1 on error.
*/
UV_EXTERN int uv_udp_bind(uv_udp_t* handle, struct sockaddr_in addr,
unsigned flags);
/*
* Bind to a IPv6 address and port.
*
* Arguments:
* handle UDP handle. Should have been initialized with `uv_udp_init`.
* addr struct sockaddr_in with the address and port to bind to.
* flags Should be 0 or UV_UDP_IPV6ONLY.
*
* Returns:
* 0 on success, -1 on error.
*/
UV_EXTERN int uv_udp_bind6(uv_udp_t* handle, struct sockaddr_in6 addr,
unsigned flags);
UV_EXTERN int uv_udp_getsockname(uv_udp_t* handle, struct sockaddr* name,
int* namelen);
/*
* Set membership for a multicast address
*
* Arguments:
* handle UDP handle. Should have been initialized with
* `uv_udp_init`.
* multicast_addr multicast address to set membership for
* interface_addr interface address
* membership Should be UV_JOIN_GROUP or UV_LEAVE_GROUP
*
* Returns:
* 0 on success, -1 on error.
*/
UV_EXTERN int uv_udp_set_membership(uv_udp_t* handle,
const char* multicast_addr, const char* interface_addr,
uv_membership membership);
/*
* Send data. If the socket has not previously been bound with `uv_udp_bind`
* or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address)
* and a random port number.
*
* Arguments:
* req UDP request handle. Need not be initialized.
* handle UDP handle. Should have been initialized with `uv_udp_init`.
* bufs List of buffers to send.
* bufcnt Number of buffers in `bufs`.
* addr Address of the remote peer. See `uv_ip4_addr`.
* send_cb Callback to invoke when the data has been sent out.
*
* Returns:
* 0 on success, -1 on error.
*/
UV_EXTERN int uv_udp_send(uv_udp_send_t* req, uv_udp_t* handle,
uv_buf_t bufs[], int bufcnt, struct sockaddr_in addr,
uv_udp_send_cb send_cb);
/*
* Send data. If the socket has not previously been bound with `uv_udp_bind6`,
* it is bound to ::0 (the "all interfaces" address) and a random port number.
*
* Arguments:
* req UDP request handle. Need not be initialized.
* handle UDP handle. Should have been initialized with `uv_udp_init`.
* bufs List of buffers to send.
* bufcnt Number of buffers in `bufs`.
* addr Address of the remote peer. See `uv_ip6_addr`.
* send_cb Callback to invoke when the data has been sent out.
*
* Returns:
* 0 on success, -1 on error.
*/
UV_EXTERN int uv_udp_send6(uv_udp_send_t* req, uv_udp_t* handle,
uv_buf_t bufs[], int bufcnt, struct sockaddr_in6 addr,
uv_udp_send_cb send_cb);
/*
* Receive data. If the socket has not previously been bound with `uv_udp_bind`
* or `uv_udp_bind6`, it is bound to 0.0.0.0 (the "all interfaces" address)
* and a random port number.
*
* Arguments:
* handle UDP handle. Should have been initialized with `uv_udp_init`.
* alloc_cb Callback to invoke when temporary storage is needed.
* recv_cb Callback to invoke with received data.
*
* Returns:
* 0 on success, -1 on error.
*/
UV_EXTERN int uv_udp_recv_start(uv_udp_t* handle, uv_alloc_cb alloc_cb,
uv_udp_recv_cb recv_cb);
/*
* Stop listening for incoming datagrams.
*
* Arguments:
* handle UDP handle. Should have been initialized with `uv_udp_init`.
*
* Returns:
* 0 on success, -1 on error.
*/
UV_EXTERN int uv_udp_recv_stop(uv_udp_t* handle);
/*
* uv_tty_t is a subclass of uv_stream_t
*
* Representing a stream for the console.
*/
struct uv_tty_s {
UV_HANDLE_FIELDS
UV_STREAM_FIELDS
UV_TTY_PRIVATE_FIELDS
};
/*
* Initialize a new TTY stream with the given file descriptor. Usually the
* file descriptor will be
* 0 = stdin
* 1 = stdout
* 2 = stderr
* The last argument, readable, specifies if you plan on calling
* uv_read_start with this stream. stdin is readable, stdout is not.
*
* TTY streams which are not readable have blocking writes.
*/
UV_EXTERN int uv_tty_init(uv_loop_t*, uv_tty_t*, uv_file fd, int readable);
/*
* Set mode. 0 for normal, 1 for raw.
*/
UV_EXTERN int uv_tty_set_mode(uv_tty_t*, int mode);
/*
* To be called when the program exits. Resets TTY settings to default
* values for the next process to take over.
*/
UV_EXTERN void uv_tty_reset_mode();
/*
* Gets the current Window size. On success zero is returned.
*/
UV_EXTERN int uv_tty_get_winsize(uv_tty_t*, int* width, int* height);
/*
* Used to detect what type of stream should be used with a given file
* descriptor. Usually this will be used during initialization to guess the
* type of the stdio streams.
* For isatty() functionality use this function and test for UV_TTY.
*/
UV_EXTERN uv_handle_type uv_guess_handle(uv_file file);
/*
* uv_pipe_t is a subclass of uv_stream_t
*
* Representing a pipe stream or pipe server. On Windows this is a Named
* Pipe. On Unix this is a UNIX domain socket.
*/
struct uv_pipe_s {
UV_HANDLE_FIELDS
UV_STREAM_FIELDS
UV_PIPE_PRIVATE_FIELDS
int ipc; /* non-zero if this pipe is used for passing handles */
};
/*
* Initialize a pipe. The last argument is a boolean to indicate if
* this pipe will be used for handle passing between processes.
*/
UV_EXTERN int uv_pipe_init(uv_loop_t*, uv_pipe_t* handle, int ipc);
/*
* Opens an existing file descriptor or HANDLE as a pipe.
*/
UV_EXTERN void uv_pipe_open(uv_pipe_t*, uv_file file);
UV_EXTERN int uv_pipe_bind(uv_pipe_t* handle, const char* name);
UV_EXTERN int uv_pipe_connect(uv_connect_t* req, uv_pipe_t* handle,
const char* name, uv_connect_cb cb);
/*
* uv_prepare_t is a subclass of uv_handle_t.
*
* libev wrapper. Every active prepare handle gets its callback called
* exactly once per loop iteration, just before the system blocks to wait
* for completed i/o.
*/
struct uv_prepare_s {
UV_HANDLE_FIELDS
UV_PREPARE_PRIVATE_FIELDS
};
UV_EXTERN int uv_prepare_init(uv_loop_t*, uv_prepare_t* prepare);
UV_EXTERN int uv_prepare_start(uv_prepare_t* prepare, uv_prepare_cb cb);
UV_EXTERN int uv_prepare_stop(uv_prepare_t* prepare);
/*
* uv_check_t is a subclass of uv_handle_t.
*
* libev wrapper. Every active check handle gets its callback called exactly
* once per loop iteration, just after the system returns from blocking.
*/
struct uv_check_s {
UV_HANDLE_FIELDS
UV_CHECK_PRIVATE_FIELDS
};
UV_EXTERN int uv_check_init(uv_loop_t*, uv_check_t* check);
UV_EXTERN int uv_check_start(uv_check_t* check, uv_check_cb cb);
UV_EXTERN int uv_check_stop(uv_check_t* check);
/*
* uv_idle_t is a subclass of uv_handle_t.
*
* libev wrapper. Every active idle handle gets its callback called
* repeatedly until it is stopped. This happens after all other types of
* callbacks are processed. When there are multiple "idle" handles active,
* their callbacks are called in turn.
*/
struct uv_idle_s {
UV_HANDLE_FIELDS
UV_IDLE_PRIVATE_FIELDS
};
UV_EXTERN int uv_idle_init(uv_loop_t*, uv_idle_t* idle);
UV_EXTERN int uv_idle_start(uv_idle_t* idle, uv_idle_cb cb);
UV_EXTERN int uv_idle_stop(uv_idle_t* idle);
/*
* uv_async_t is a subclass of uv_handle_t.
*
* libev wrapper. uv_async_send wakes up the event
* loop and calls the async handle's callback There is no guarantee that
* every uv_async_send call leads to exactly one invocation of the callback;
* The only guarantee is that the callback function is called at least once
* after the call to async_send. Unlike all other libuv functions,
* uv_async_send can be called from another thread.
*/
struct uv_async_s {
UV_HANDLE_FIELDS
UV_ASYNC_PRIVATE_FIELDS
};
UV_EXTERN int uv_async_init(uv_loop_t*, uv_async_t* async,
uv_async_cb async_cb);
/*
* This can be called from other threads to wake up a libuv thread.
*
* libuv is single threaded at the moment.
*/
UV_EXTERN int uv_async_send(uv_async_t* async);
/*
* uv_timer_t is a subclass of uv_handle_t.
*
* Wraps libev's ev_timer watcher. Used to get woken up at a specified time
* in the future.
*/
struct uv_timer_s {
UV_HANDLE_FIELDS
UV_TIMER_PRIVATE_FIELDS
};
UV_EXTERN int uv_timer_init(uv_loop_t*, uv_timer_t* timer);
UV_EXTERN int uv_timer_start(uv_timer_t* timer, uv_timer_cb cb,
int64_t timeout, int64_t repeat);
UV_EXTERN int uv_timer_stop(uv_timer_t* timer);
/*
* Stop the timer, and if it is repeating restart it using the repeat value
* as the timeout. If the timer has never been started before it returns -1 and
* sets the error to UV_EINVAL.
*/
UV_EXTERN int uv_timer_again(uv_timer_t* timer);
/*
* Set the repeat value. Note that if the repeat value is set from a timer
* callback it does not immediately take effect. If the timer was nonrepeating
* before, it will have been stopped. If it was repeating, then the old repeat
* value will have been used to schedule the next timeout.
*/
UV_EXTERN void uv_timer_set_repeat(uv_timer_t* timer, int64_t repeat);
UV_EXTERN int64_t uv_timer_get_repeat(uv_timer_t* timer);
/* c-ares integration initialize and terminate */
UV_EXTERN int uv_ares_init_options(uv_loop_t*,
ares_channel *channelptr, struct ares_options *options, int optmask);
/* TODO remove the loop argument from this function? */
UV_EXTERN void uv_ares_destroy(uv_loop_t*, ares_channel channel);
/*
* uv_getaddrinfo_t is a subclass of uv_req_t
*
* Request object for uv_getaddrinfo.
*/
struct uv_getaddrinfo_s {
UV_REQ_FIELDS
/* read-only */
uv_loop_t* loop; \
UV_GETADDRINFO_PRIVATE_FIELDS
};
/*
* Asynchronous getaddrinfo(3).
*
* Return code 0 means that request is accepted and callback will be called
* with result. Other return codes mean that there will not be a callback.
* Input arguments may be released after return from this call.
*
* uv_freeaddrinfo() must be called after completion to free the addrinfo
* structure.
*
* On error NXDOMAIN the status code will be non-zero and UV_ENOENT returned.
*/
UV_EXTERN int uv_getaddrinfo(uv_loop_t*, uv_getaddrinfo_t* handle,
uv_getaddrinfo_cb getaddrinfo_cb, const char* node, const char* service,
const struct addrinfo* hints);
UV_EXTERN void uv_freeaddrinfo(struct addrinfo* ai);
/* uv_spawn() options */
typedef struct uv_process_options_s {
uv_exit_cb exit_cb; /* Called after the process exits. */
const char* file; /* Path to program to execute. */
/*
* Command line arguments. args[0] should be the path to the program. On
* Windows this uses CreateProcess which concatinates the arguments into a
* string this can cause some strange errors. See the note at
* windows_verbatim_arguments.
*/
char** args;
/*
* This will be set as the environ variable in the subprocess. If this is
* NULL then the parents environ will be used.
*/
char** env;
/*
* If non-null this represents a directory the subprocess should execute
* in. Stands for current working directory.
*/
char* cwd;
/*
* TODO describe how this works.
*/
int windows_verbatim_arguments;
/*
* The user should supply pointers to initialized uv_pipe_t structs for
* stdio. This is used to to send or receive input from the subprocess.
* The user is reponsible for calling uv_close on them.
*/
uv_pipe_t* stdin_stream;
uv_pipe_t* stdout_stream;
uv_pipe_t* stderr_stream;
} uv_process_options_t;
/*
* uv_process_t is a subclass of uv_handle_t
*/
struct uv_process_s {
UV_HANDLE_FIELDS
uv_exit_cb exit_cb;
int pid;
UV_PROCESS_PRIVATE_FIELDS
};
/* Initializes uv_process_t and starts the process. */
UV_EXTERN int uv_spawn(uv_loop_t*, uv_process_t*,
uv_process_options_t options);
/*
* Kills the process with the specified signal. The user must still
* call uv_close on the process.
*/
UV_EXTERN int uv_process_kill(uv_process_t*, int signum);
/*
* uv_work_t is a subclass of uv_req_t
*/
struct uv_work_s {
UV_REQ_FIELDS
uv_loop_t* loop;
uv_work_cb work_cb;
uv_after_work_cb after_work_cb;
UV_WORK_PRIVATE_FIELDS
};
/* Queues a work request to execute asynchronously on the thread pool. */
UV_EXTERN int uv_queue_work(uv_loop_t* loop, uv_work_t* req,
uv_work_cb work_cb, uv_after_work_cb after_work_cb);
/*
* File System Methods.
*
* The uv_fs_* functions execute a blocking system call asynchronously (in a
* thread pool) and call the specified callback in the specified loop after
* completion. If the user gives NULL as the callback the blocking system
* call will be called synchronously. req should be a pointer to an
* uninitialized uv_fs_t object.
*
* uv_fs_req_cleanup() must be called after completion of the uv_fs_
* function to free any internal memory allocations associted with the
* request.
*/
typedef enum {
UV_FS_UNKNOWN = -1,
UV_FS_CUSTOM,
UV_FS_OPEN,
UV_FS_CLOSE,
UV_FS_READ,
UV_FS_WRITE,
UV_FS_SENDFILE,
UV_FS_STAT,
UV_FS_LSTAT,
UV_FS_FSTAT,
UV_FS_FTRUNCATE,
UV_FS_UTIME,
UV_FS_FUTIME,
UV_FS_CHMOD,
UV_FS_FCHMOD,
UV_FS_FSYNC,
UV_FS_FDATASYNC,
UV_FS_UNLINK,
UV_FS_RMDIR,
UV_FS_MKDIR,
UV_FS_RENAME,
UV_FS_READDIR,
UV_FS_LINK,
UV_FS_SYMLINK,
UV_FS_READLINK,
UV_FS_CHOWN,
UV_FS_FCHOWN
} uv_fs_type;
/* uv_fs_t is a subclass of uv_req_t */
struct uv_fs_s {
UV_REQ_FIELDS
uv_loop_t* loop;
uv_fs_type fs_type;
uv_fs_cb cb;
ssize_t result;
void* ptr;
char* path;
int errorno;
UV_FS_PRIVATE_FIELDS
};
UV_EXTERN void uv_fs_req_cleanup(uv_fs_t* req);
UV_EXTERN int uv_fs_close(uv_loop_t* loop, uv_fs_t* req, uv_file file,
uv_fs_cb cb);
UV_EXTERN int uv_fs_open(uv_loop_t* loop, uv_fs_t* req, const char* path,
int flags, int mode, uv_fs_cb cb);
UV_EXTERN int uv_fs_read(uv_loop_t* loop, uv_fs_t* req, uv_file file,
void* buf, size_t length, off_t offset, uv_fs_cb cb);
UV_EXTERN int uv_fs_unlink(uv_loop_t* loop, uv_fs_t* req, const char* path,
uv_fs_cb cb);
UV_EXTERN int uv_fs_write(uv_loop_t* loop, uv_fs_t* req, uv_file file,
void* buf, size_t length, off_t offset, uv_fs_cb cb);
UV_EXTERN int uv_fs_mkdir(uv_loop_t* loop, uv_fs_t* req, const char* path,
int mode, uv_fs_cb cb);
UV_EXTERN int uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path,
uv_fs_cb cb);
UV_EXTERN int uv_fs_readdir(uv_loop_t* loop, uv_fs_t* req,
const char* path, int flags, uv_fs_cb cb);
UV_EXTERN int uv_fs_stat(uv_loop_t* loop, uv_fs_t* req, const char* path,
uv_fs_cb cb);
UV_EXTERN int uv_fs_fstat(uv_loop_t* loop, uv_fs_t* req, uv_file file,
uv_fs_cb cb);
UV_EXTERN int uv_fs_rename(uv_loop_t* loop, uv_fs_t* req, const char* path,
const char* new_path, uv_fs_cb cb);
UV_EXTERN int uv_fs_fsync(uv_loop_t* loop, uv_fs_t* req, uv_file file,
uv_fs_cb cb);
UV_EXTERN int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file,
uv_fs_cb cb);
UV_EXTERN int uv_fs_ftruncate(uv_loop_t* loop, uv_fs_t* req, uv_file file,
off_t offset, uv_fs_cb cb);
UV_EXTERN int uv_fs_sendfile(uv_loop_t* loop, uv_fs_t* req, uv_file out_fd,
uv_file in_fd, off_t in_offset, size_t length, uv_fs_cb cb);
UV_EXTERN int uv_fs_chmod(uv_loop_t* loop, uv_fs_t* req, const char* path,
int mode, uv_fs_cb cb);
UV_EXTERN int uv_fs_utime(uv_loop_t* loop, uv_fs_t* req, const char* path,
double atime, double mtime, uv_fs_cb cb);
UV_EXTERN int uv_fs_futime(uv_loop_t* loop, uv_fs_t* req, uv_file file,
double atime, double mtime, uv_fs_cb cb);
UV_EXTERN int uv_fs_lstat(uv_loop_t* loop, uv_fs_t* req, const char* path,
uv_fs_cb cb);
UV_EXTERN int uv_fs_link(uv_loop_t* loop, uv_fs_t* req, const char* path,
const char* new_path, uv_fs_cb cb);
/*
* This flag can be used with uv_fs_symlink on Windows
* to specify whether path argument points to a directory.
*/
#define UV_FS_SYMLINK_DIR 0x0001
UV_EXTERN int uv_fs_symlink(uv_loop_t* loop, uv_fs_t* req, const char* path,
const char* new_path, int flags, uv_fs_cb cb);
UV_EXTERN int uv_fs_readlink(uv_loop_t* loop, uv_fs_t* req, const char* path,
uv_fs_cb cb);
UV_EXTERN int uv_fs_fchmod(uv_loop_t* loop, uv_fs_t* req, uv_file file,
int mode, uv_fs_cb cb);
UV_EXTERN int uv_fs_chown(uv_loop_t* loop, uv_fs_t* req, const char* path,
int uid, int gid, uv_fs_cb cb);
UV_EXTERN int uv_fs_fchown(uv_loop_t* loop, uv_fs_t* req, uv_file file,
int uid, int gid, uv_fs_cb cb);
enum uv_fs_event {
UV_RENAME = 1,
UV_CHANGE = 2
};
struct uv_fs_event_s {
UV_HANDLE_FIELDS
char* filename;
UV_FS_EVENT_PRIVATE_FIELDS
};
/*
* Gets load avg
* See: http://en.wikipedia.org/wiki/Load_(computing)
* (Returns [0,0,0] for windows and cygwin)
*/
UV_EXTERN void uv_loadavg(double avg[3]);
/*
* If filename is a directory then we will watch for all events in that
* directory. If filename is a file - we will only get events from that
* file. Subdirectories are not watched.
*/
UV_EXTERN int uv_fs_event_init(uv_loop_t* loop, uv_fs_event_t* handle,
const char* filename, uv_fs_event_cb cb);
/* Utility */
/* Convert string ip addresses to binary structures */
UV_EXTERN struct sockaddr_in uv_ip4_addr(const char* ip, int port);
UV_EXTERN struct sockaddr_in6 uv_ip6_addr(const char* ip, int port);
/* Convert binary addresses to strings */
UV_EXTERN int uv_ip4_name(struct sockaddr_in* src, char* dst, size_t size);
UV_EXTERN int uv_ip6_name(struct sockaddr_in6* src, char* dst, size_t size);
/* Gets the executable path */
UV_EXTERN int uv_exepath(char* buffer, size_t* size);
/* Gets memory info in bytes */
UV_EXTERN uint64_t uv_get_free_memory(void);
UV_EXTERN uint64_t uv_get_total_memory(void);
/*
* Returns the current high-resolution real time. This is expressed in
* nanoseconds. It is relative to an arbitrary time in the past. It is not
* related to the time of day and therefore not subject to clock drift. The
* primary use is for measuring performance between intervals.
*
* Note not every platform can support nanosecond resolution; however, this
* value will always be in nanoseconds.
*/
UV_EXTERN extern uint64_t uv_hrtime(void);
/*
* Opens a shared library. The filename is in utf-8. On success, -1 is
* and the variable pointed by library receives a handle to the library.
*/
UV_EXTERN uv_err_t uv_dlopen(const char* filename, uv_lib_t* library);
UV_EXTERN uv_err_t uv_dlclose(uv_lib_t library);
/*
* Retrieves a data pointer from a dynamic library.
*/
UV_EXTERN uv_err_t uv_dlsym(uv_lib_t library, const char* name, void** ptr);
/* the presence of these unions force similar struct layout */
union uv_any_handle {
uv_tcp_t tcp;
uv_pipe_t pipe;
uv_prepare_t prepare;
uv_check_t check;
uv_idle_t idle;
uv_async_t async;
uv_timer_t timer;
uv_getaddrinfo_t getaddrinfo;
uv_fs_event_t fs_event;
};
union uv_any_req {
uv_req_t req;
uv_write_t write;
uv_connect_t connect;
uv_shutdown_t shutdown;
uv_fs_t fs_req;
uv_work_t work_req;
};
struct uv_counters_s {
uint64_t eio_init;
uint64_t req_init;
uint64_t handle_init;
uint64_t stream_init;
uint64_t tcp_init;
uint64_t udp_init;
uint64_t pipe_init;
uint64_t tty_init;
uint64_t prepare_init;
uint64_t check_init;
uint64_t idle_init;
uint64_t async_init;
uint64_t timer_init;
uint64_t process_init;
uint64_t fs_event_init;
};
struct uv_loop_s {
UV_LOOP_PRIVATE_FIELDS
/* list used for ares task handles */
uv_ares_task_t* uv_ares_handles_;
/* Various thing for libeio. */
uv_async_t uv_eio_want_poll_notifier;
uv_async_t uv_eio_done_poll_notifier;
uv_idle_t uv_eio_poller;
/* Diagnostic counters */
uv_counters_t counters;
/* The last error */
uv_err_t last_err;
/* User data - use this for whatever. */
void* data;
};
/* Don't export the private CPP symbols. */
#undef UV_REQ_TYPE_PRIVATE
#undef UV_REQ_PRIVATE_FIELDS
#undef UV_STREAM_PRIVATE_FIELDS
#undef UV_TCP_PRIVATE_FIELDS
#undef UV_PREPARE_PRIVATE_FIELDS
#undef UV_CHECK_PRIVATE_FIELDS
#undef UV_IDLE_PRIVATE_FIELDS
#undef UV_ASYNC_PRIVATE_FIELDS
#undef UV_TIMER_PRIVATE_FIELDS
#undef UV_GETADDRINFO_PRIVATE_FIELDS
#undef UV_FS_REQ_PRIVATE_FIELDS
#undef UV_WORK_PRIVATE_FIELDS
#undef UV_FS_EVENT_PRIVATE_FIELDS
#ifdef __cplusplus
}
#endif
#endif /* UV_H */
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