internal.h

/* 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.
 */

#ifndef UV_WIN_INTERNAL_H_
#define UV_WIN_INTERNAL_H_

#include "uv.h"
#include "../uv-common.h"

#include "tree.h"
#include "winapi.h"
#include "winsock.h"


/*
 * Timers
 */
void uv_timer_endgame(uv_loop_t* loop, uv_timer_t* handle);

DWORD uv_get_poll_timeout(uv_loop_t* loop);
void uv_process_timers(uv_loop_t* loop);


/*
 * Handles
 */

/* Private uv_handle flags */
#define UV_HANDLE_CLOSING          0x0001
#define UV_HANDLE_CLOSED           0x0002
#define UV_HANDLE_BOUND            0x0004
#define UV_HANDLE_LISTENING        0x0008
#define UV_HANDLE_CONNECTION       0x0010
#define UV_HANDLE_CONNECTED        0x0020
#define UV_HANDLE_READING          0x0040
#define UV_HANDLE_ACTIVE           0x0040
#define UV_HANDLE_EOF              0x0080
#define UV_HANDLE_SHUTTING         0x0100
#define UV_HANDLE_SHUT             0x0200
#define UV_HANDLE_ENDGAME_QUEUED   0x0400
#define UV_HANDLE_BIND_ERROR       0x1000
#define UV_HANDLE_IPV6             0x2000
#define UV_HANDLE_PIPESERVER       0x4000
#define UV_HANDLE_READ_PENDING     0x8000
#define UV_HANDLE_GIVEN_OS_HANDLE  0x10000
#define UV_HANDLE_UV_ALLOCED       0x20000
#define UV_HANDLE_SYNC_BYPASS_IOCP 0x40000
#define UV_HANDLE_ZERO_READ        0x80000
#define UV_HANDLE_TTY_RAW          0x100000

void uv_want_endgame(uv_loop_t* loop, uv_handle_t* handle);
void uv_process_endgames(uv_loop_t* loop);

#define DECREASE_PENDING_REQ_COUNT(handle)    \
  do {                                        \
    assert(handle->reqs_pending > 0);         \
    handle->reqs_pending--;                   \
                                              \
    if (handle->flags & UV_HANDLE_CLOSING &&  \
        handle->reqs_pending == 0) {          \
      uv_want_endgame(loop, (uv_handle_t*)handle);  \
    }                                         \
  } while (0)

#define UV_SUCCEEDED_WITHOUT_IOCP(result)                     \
  ((result) && (handle->flags & UV_HANDLE_SYNC_BYPASS_IOCP))

#define UV_SUCCEEDED_WITH_IOCP(result)                        \
  ((result) || (GetLastError() == ERROR_IO_PENDING))


/*
 * Requests
 */
void uv_req_init(uv_loop_t* loop, uv_req_t* req);

uv_req_t* uv_overlapped_to_req(OVERLAPPED* overlapped);

void uv_insert_pending_req(uv_loop_t* loop, uv_req_t* req);
void uv_process_reqs(uv_loop_t* loop);

#define POST_COMPLETION_FOR_REQ(loop, req)                                    \
  if (!PostQueuedCompletionStatus((loop)->iocp,                           \
                                  0,                                    \
                                  0,                                    \
                                  &((req)->overlapped))) {              \
    uv_fatal_error(GetLastError(), "PostQueuedCompletionStatus");       \
  }


/*
 * Streams
 */
void uv_stream_init(uv_loop_t* loop, uv_stream_t* handle);
void uv_connection_init(uv_stream_t* handle);

size_t uv_count_bufs(uv_buf_t bufs[], int count);


/*
 * TCP
 */
int uv_tcp_listen(uv_tcp_t* handle, int backlog, uv_connection_cb cb);
int uv_tcp_accept(uv_tcp_t* server, uv_tcp_t* client);
int uv_tcp_read_start(uv_tcp_t* handle, uv_alloc_cb alloc_cb,
    uv_read_cb read_cb);
int uv_tcp_write(uv_loop_t* loop, uv_write_t* req, uv_tcp_t* handle,
    uv_buf_t bufs[], int bufcnt, uv_write_cb cb);

void uv_process_tcp_read_req(uv_loop_t* loop, uv_tcp_t* handle, uv_req_t* req);
void uv_process_tcp_write_req(uv_loop_t* loop, uv_tcp_t* handle,
    uv_write_t* req);
void uv_process_tcp_accept_req(uv_loop_t* loop, uv_tcp_t* handle,
    uv_req_t* req);
void uv_process_tcp_connect_req(uv_loop_t* loop, uv_tcp_t* handle,
    uv_connect_t* req);

void uv_tcp_endgame(uv_loop_t* loop, uv_tcp_t* handle);


/*
 * UDP
 */
void uv_process_udp_recv_req(uv_loop_t* loop, uv_udp_t* handle, uv_req_t* req);
void uv_process_udp_send_req(uv_loop_t* loop, uv_udp_t* handle,
    uv_udp_send_t* req);

void uv_udp_endgame(uv_loop_t* loop, uv_udp_t* handle);


/*
 * Pipes
 */
int uv_pipe_init_with_handle(uv_loop_t* loop, uv_pipe_t* handle,
    HANDLE pipeHandle);
int uv_stdio_pipe_server(uv_loop_t* loop, uv_pipe_t* handle, DWORD access,
    char* name, size_t nameSize);
void close_pipe(uv_pipe_t* handle, int* status, uv_err_t* err);
void uv_pipe_endgame(uv_loop_t* loop, uv_pipe_t* handle);

int uv_pipe_listen(uv_pipe_t* handle, int backlog, uv_connection_cb cb);
int uv_pipe_accept(uv_pipe_t* server, uv_pipe_t* client);
int uv_pipe_read_start(uv_pipe_t* handle, uv_alloc_cb alloc_cb,
    uv_read_cb read_cb);
int uv_pipe_write(uv_loop_t* loop, uv_write_t* req, uv_pipe_t* handle,
    uv_buf_t bufs[], int bufcnt, uv_write_cb cb);

void uv_process_pipe_read_req(uv_loop_t* loop, uv_pipe_t* handle,
    uv_req_t* req);
void uv_process_pipe_write_req(uv_loop_t* loop, uv_pipe_t* handle,
    uv_write_t* req);
void uv_process_pipe_accept_req(uv_loop_t* loop, uv_pipe_t* handle,
    uv_req_t* raw_req);
void uv_process_pipe_connect_req(uv_loop_t* loop, uv_pipe_t* handle,
    uv_connect_t* req);
void uv_process_pipe_shutdown_req(uv_loop_t* loop, uv_pipe_t* handle,
    uv_shutdown_t* req);


/*
 * TTY
 */
void uv_console_init();

int uv_tty_read_start(uv_tty_t* handle, uv_alloc_cb alloc_cb,
    uv_read_cb read_cb);
int uv_tty_read_stop(uv_tty_t* handle);
int uv_tty_write(uv_loop_t* loop, uv_write_t* req, uv_tty_t* handle,
    uv_buf_t bufs[], int bufcnt, uv_write_cb cb);
void uv_tty_close(uv_tty_t* handle);

void uv_process_tty_read_req(uv_loop_t* loop, uv_tty_t* handle,
    uv_req_t* req);
void uv_process_tty_write_req(uv_loop_t* loop, uv_tty_t* handle,
    uv_write_t* req);
/* TODO: remove me */
void uv_process_tty_accept_req(uv_loop_t* loop, uv_tty_t* handle,
    uv_req_t* raw_req);
/* TODO: remove me */
void uv_process_tty_connect_req(uv_loop_t* loop, uv_tty_t* handle,
    uv_connect_t* req);

void uv_tty_endgame(uv_loop_t* loop, uv_tty_t* handle);


/*
 * Loop watchers
 */
void uv_loop_watcher_endgame(uv_loop_t* loop, uv_handle_t* handle);

void uv_prepare_invoke(uv_loop_t* loop);
void uv_check_invoke(uv_loop_t* loop);
void uv_idle_invoke(uv_loop_t* loop);


/*
 * Async watcher
 */
void uv_async_endgame(uv_loop_t* loop, uv_async_t* handle);

void uv_process_async_wakeup_req(uv_loop_t* loop, uv_async_t* handle,
    uv_req_t* req);


/*
 * Spawn
 */
void uv_process_proc_exit(uv_loop_t* loop, uv_process_t* handle);
void uv_process_proc_close(uv_loop_t* loop, uv_process_t* handle);
void uv_process_close(uv_loop_t* loop, uv_process_t* handle);
void uv_process_endgame(uv_loop_t* loop, uv_process_t* handle);


/*
 * C-ares integration
 */
typedef struct uv_ares_action_s uv_ares_action_t;

void uv_process_ares_event_req(uv_loop_t* loop, uv_ares_action_t* handle,
    uv_req_t* req);
void uv_process_ares_cleanup_req(uv_loop_t* loop, uv_ares_task_t* handle,
    uv_req_t* req);

/*
 * Getaddrinfo
 */
void uv_process_getaddrinfo_req(uv_loop_t* loop, uv_getaddrinfo_t* handle,
    uv_req_t* req);


/*
 * FS
 */
void uv_fs_init();
void uv_process_fs_req(uv_loop_t* loop, uv_fs_t* req);


/*
 * Threadpool
 */
void uv_process_work_req(uv_loop_t* loop, uv_work_t* req);


/*
 * FS Event
 */
void uv_process_fs_event_req(uv_loop_t* loop, uv_req_t* req, uv_fs_event_t* handle);
void uv_fs_event_close(uv_loop_t* loop, uv_fs_event_t* handle);
void uv_fs_event_endgame(uv_loop_t* loop, uv_fs_event_t* handle);


/*
 * Error handling
 */
extern const uv_err_t uv_ok_;

void uv_fatal_error(const int errorno, const char* syscall);

uv_err_code uv_translate_sys_error(int sys_errno);
uv_err_t uv_new_sys_error(int sys_errno);
void uv_set_sys_error(uv_loop_t* loop, int sys_errno);
void uv_set_error(uv_loop_t* loop, uv_err_code code, int sys_errno);

#define SET_REQ_STATUS(req, status)                                     \
   (req)->overlapped.Internal = (ULONG_PTR) (status)

#define SET_REQ_ERROR(req, error)                                       \
  SET_REQ_STATUS((req), NTSTATUS_FROM_WIN32((error)))

#define SET_REQ_SUCCESS(req)                                            \
  SET_REQ_STATUS((req), STATUS_SUCCESS)

#define GET_REQ_STATUS(req)                                             \
  ((req)->overlapped.Internal)

#define REQ_SUCCESS(req)                                                \
  (NT_SUCCESS(GET_REQ_STATUS((req))))

#define GET_REQ_ERROR(req)                                              \
  (pRtlNtStatusToDosError(GET_REQ_STATUS((req))))

#define GET_REQ_SOCK_ERROR(req)                                         \
  (uv_ntstatus_to_winsock_error(GET_REQ_STATUS((req))))

#define GET_REQ_UV_ERROR(req)                                           \
  (uv_new_sys_error(GET_REQ_ERROR((req))))

#define GET_REQ_UV_SOCK_ERROR(req)                                      \
  (uv_new_sys_error(GET_REQ_SOCK_ERROR((req))))


/*
 * Initialization for the windows and winsock api
 */
void uv_winapi_init();
void uv_winsock_init();
int uv_ntstatus_to_winsock_error(NTSTATUS status);


/* Threads and synchronization */
typedef struct uv_once_s {
  unsigned char ran;
  /* The actual event handle must be aligned to sizeof(HANDLE), so in */
  /* practice it might overlap padding a little. */
  HANDLE event;
  HANDLE padding;
} uv_once_t;

#define UV_ONCE_INIT \
  { 0, NULL, NULL }

void uv_once(uv_once_t* guard, void (*callback)(void));


#endif /* UV_WIN_INTERNAL_H_ */