hw/9pfs/coth.c

   1 /*
   2  * 9p backend
   3  *
   4  * Copyright IBM, Corp. 2010
   5  *
   6  * Authors:
   7  *  Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
   8  *  Venkateswararao Jujjuri(JV) <jvrao@linux.vnet.ibm.com>
   9  *
  10  * This work is licensed under the terms of the GNU GPL, version 2.  See
  11  * the COPYING file in the top-level directory.
  12  *
  13  */
  14
  15 /*
  16  * Not so fast! You might want to read the 9p developer docs first:
  17  * https://wiki.qemu.org/Documentation/9p
  18  */
  19
  20 #include "qemu/osdep.h"
  21 #include "block/thread-pool.h"
  22 #include "qemu/coroutine.h"
  23 #include "qemu/main-loop.h"
  24 #include "coth.h"
  25
  26 /* Called from QEMU I/O thread.  */
  27 static void coroutine_enter_cb(void *opaque, int ret)
  28 {
  29     Coroutine *co = opaque;
  30     qemu_coroutine_enter(co);
  31 }
  32
  33 /* Called from worker thread.  */
  34 static int coroutine_enter_func(void *arg)
  35 {
  36     Coroutine *co = arg;
  37     qemu_coroutine_enter(co);
  38     return 0;
  39 }
  40
  41 void co_run_in_worker_bh(void *opaque)
  42 {
  43     Coroutine *co = opaque;
  44     thread_pool_submit_aio(coroutine_enter_func, co, coroutine_enter_cb, co);
  45 }