block/block-gen.h

   1 /*
   2  * Block coroutine wrapping core, used by auto-generated block/block-gen.c
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  * Copyright (c) 2020 Virtuozzo International GmbH
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #ifndef BLOCK_BLOCK_GEN_H
  27 #define BLOCK_BLOCK_GEN_H
  28
  29 #include "block/block_int.h"
  30
  31 /* Base structure for argument packing structures */
  32 typedef struct BdrvPollCo {
  33     AioContext *ctx;
  34     bool in_progress;
  35     Coroutine *co; /* Keep pointer here for debugging */
  36 } BdrvPollCo;
  37
  38 static inline void bdrv_poll_co(BdrvPollCo *s)
  39 {
  40     assert(!qemu_in_coroutine());
  41
  42     aio_co_enter(s->ctx, s->co);
  43     AIO_WAIT_WHILE(s->ctx, s->in_progress);
  44 }
  45
  46 #endif /* BLOCK_BLOCK_GEN_H */