Utilities/cmlibuv/src/win/req-inl.h

   1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy
   4  * of this software and associated documentation files (the "Software"), to
   5  * deal in the Software without restriction, including without limitation the
   6  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   7  * sell copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in
  11  * all copies or substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  18  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  19  * IN THE SOFTWARE.
  20  */
  21
  22 #ifndef UV_WIN_REQ_INL_H_
  23 #define UV_WIN_REQ_INL_H_
  24
  25 #include <assert.h>
  26
  27 #include "uv.h"
  28 #include "internal.h"
  29
  30
  31 #define SET_REQ_STATUS(req, status)                                     \
  32    (req)->u.io.overlapped.Internal = (ULONG_PTR) (status)
  33
  34 #define SET_REQ_ERROR(req, error)                                       \
  35   SET_REQ_STATUS((req), NTSTATUS_FROM_WIN32((error)))
  36
  37 /* Note: used open-coded in UV_REQ_INIT() because of a circular dependency
  38  * between src/uv-common.h and src/win/internal.h.
  39  */
  40 #define SET_REQ_SUCCESS(req)                                            \
  41   SET_REQ_STATUS((req), STATUS_SUCCESS)
  42
  43 #define GET_REQ_STATUS(req)                                             \
  44   ((NTSTATUS) (req)->u.io.overlapped.Internal)
  45
  46 #define REQ_SUCCESS(req)                                                \
  47   (NT_SUCCESS(GET_REQ_STATUS((req))))
  48
  49 #define GET_REQ_ERROR(req)                                              \
  50   (pRtlNtStatusToDosError(GET_REQ_STATUS((req))))
  51
  52 #define GET_REQ_SOCK_ERROR(req)                                         \
  53   (uv_ntstatus_to_winsock_error(GET_REQ_STATUS((req))))
  54
  55
  56 #define REGISTER_HANDLE_REQ(loop, handle, req)                          \
  57   do {                                                                  \
  58     INCREASE_ACTIVE_COUNT((loop), (handle));                            \
  59     uv__req_register((loop), (req));                                    \
  60   } while (0)
  61
  62 #define UNREGISTER_HANDLE_REQ(loop, handle, req)                        \
  63   do {                                                                  \
  64     DECREASE_ACTIVE_COUNT((loop), (handle));                            \
  65     uv__req_unregister((loop), (req));                                  \
  66   } while (0)
  67
  68
  69 #define UV_SUCCEEDED_WITHOUT_IOCP(result)                               \
  70   ((result) && (handle->flags & UV_HANDLE_SYNC_BYPASS_IOCP))
  71
  72 #define UV_SUCCEEDED_WITH_IOCP(result)                                  \
  73   ((result) || (GetLastError() == ERROR_IO_PENDING))
  74
  75
  76 #define POST_COMPLETION_FOR_REQ(loop, req)                              \
  77   if (!PostQueuedCompletionStatus((loop)->iocp,                         \
  78                                   0,                                    \
  79                                   0,                                    \
  80                                   &((req)->u.io.overlapped))) {         \
  81     uv_fatal_error(GetLastError(), "PostQueuedCompletionStatus");       \
  82   }
  83
  84
  85 INLINE static uv_req_t* uv_overlapped_to_req(OVERLAPPED* overlapped) {
  86   return CONTAINING_RECORD(overlapped, uv_req_t, u.io.overlapped);
  87 }
  88
  89
  90 INLINE static void uv_insert_pending_req(uv_loop_t* loop, uv_req_t* req) {
  91   req->next_req = NULL;
  92   if (loop->pending_reqs_tail) {
  93 #ifdef _DEBUG
  94     /* Ensure the request is not already in the queue, or the queue
  95      * will get corrupted.
  96      */
  97     uv_req_t* current = loop->pending_reqs_tail;
  98     do {
  99       assert(req != current);
 100       current = current->next_req;
 101     } while(current != loop->pending_reqs_tail);
 102 #endif
 103
 104     req->next_req = loop->pending_reqs_tail->next_req;
 105     loop->pending_reqs_tail->next_req = req;
 106     loop->pending_reqs_tail = req;
 107   } else {
 108     req->next_req = req;
 109     loop->pending_reqs_tail = req;
 110   }
 111 }
 112
 113
 114 #define DELEGATE_STREAM_REQ(loop, req, method, handle_at)                     \
 115   do {                                                                        \
 116     switch (((uv_handle_t*) (req)->handle_at)->type) {                        \
 117       case UV_TCP:                                                            \
 118         uv_process_tcp_##method##_req(loop,                                   \
 119                                       (uv_tcp_t*) ((req)->handle_at),         \
 120                                       req);                                   \
 121         break;                                                                \
 122                                                                               \
 123       case UV_NAMED_PIPE:                                                     \
 124         uv_process_pipe_##method##_req(loop,                                  \
 125                                        (uv_pipe_t*) ((req)->handle_at),       \
 126                                        req);                                  \
 127         break;                                                                \
 128                                                                               \
 129       case UV_TTY:                                                            \
 130         uv_process_tty_##method##_req(loop,                                   \
 131                                       (uv_tty_t*) ((req)->handle_at),         \
 132                                       req);                                   \
 133         break;                                                                \
 134                                                                               \
 135       default:                                                                \
 136         assert(0);                                                            \
 137     }                                                                         \
 138   } while (0)
 139
 140
 141 INLINE static int uv_process_reqs(uv_loop_t* loop) {
 142   uv_req_t* req;
 143   uv_req_t* first;
 144   uv_req_t* next;
 145
 146   if (loop->pending_reqs_tail == NULL)
 147     return 0;
 148
 149   first = loop->pending_reqs_tail->next_req;
 150   next = first;
 151   loop->pending_reqs_tail = NULL;
 152
 153   while (next != NULL) {
 154     req = next;
 155     next = req->next_req != first ? req->next_req : NULL;
 156
 157     switch (req->type) {
 158       case UV_READ:
 159         DELEGATE_STREAM_REQ(loop, req, read, data);
 160         break;
 161
 162       case UV_WRITE:
 163         DELEGATE_STREAM_REQ(loop, (uv_write_t*) req, write, handle);
 164         break;
 165
 166       case UV_ACCEPT:
 167         DELEGATE_STREAM_REQ(loop, req, accept, data);
 168         break;
 169
 170       case UV_CONNECT:
 171         DELEGATE_STREAM_REQ(loop, (uv_connect_t*) req, connect, handle);
 172         break;
 173
 174       case UV_SHUTDOWN:
 175         /* Tcp shutdown requests don't come here. */
 176         assert(((uv_shutdown_t*) req)->handle->type == UV_NAMED_PIPE);
 177         uv_process_pipe_shutdown_req(
 178             loop,
 179             (uv_pipe_t*) ((uv_shutdown_t*) req)->handle,
 180             (uv_shutdown_t*) req);
 181         break;
 182
 183       case UV_UDP_RECV:
 184         uv_process_udp_recv_req(loop, (uv_udp_t*) req->data, req);
 185         break;
 186
 187       case UV_UDP_SEND:
 188         uv_process_udp_send_req(loop,
 189                                 ((uv_udp_send_t*) req)->handle,
 190                                 (uv_udp_send_t*) req);
 191         break;
 192
 193       case UV_WAKEUP:
 194         uv_process_async_wakeup_req(loop, (uv_async_t*) req->data, req);
 195         break;
 196
 197       case UV_SIGNAL_REQ:
 198         uv_process_signal_req(loop, (uv_signal_t*) req->data, req);
 199         break;
 200
 201       case UV_POLL_REQ:
 202         uv_process_poll_req(loop, (uv_poll_t*) req->data, req);
 203         break;
 204
 205       case UV_PROCESS_EXIT:
 206         uv_process_proc_exit(loop, (uv_process_t*) req->data);
 207         break;
 208
 209       case UV_FS_EVENT_REQ:
 210         uv_process_fs_event_req(loop, req, (uv_fs_event_t*) req->data);
 211         break;
 212
 213       default:
 214         assert(0);
 215     }
 216   }
 217
 218   return 1;
 219 }
 220
 221 #endif /* UV_WIN_REQ_INL_H_ */