include/block/thread-pool.h

   1 /*
   2  * QEMU block layer thread pool
   3  *
   4  * Copyright IBM, Corp. 2008
   5  * Copyright Red Hat, Inc. 2012
   6  *
   7  * Authors:
   8  *  Anthony Liguori   <aliguori@us.ibm.com>
   9  *  Paolo Bonzini     <pbonzini@redhat.com>
  10  *
  11  * This work is licensed under the terms of the GNU GPL, version 2.  See
  12  * the COPYING file in the top-level directory.
  13  *
  14  * Contributions after 2012-01-13 are licensed under the terms of the
  15  * GNU GPL, version 2 or (at your option) any later version.
  16  */
  17
  18 #ifndef QEMU_THREAD_POOL_H
  19 #define QEMU_THREAD_POOL_H
  20
  21 #include "block/aio.h"
  22
  23 #define THREAD_POOL_MAX_THREADS_DEFAULT         64
  24
  25 typedef int ThreadPoolFunc(void *opaque);
  26
  27 typedef struct ThreadPool ThreadPool;
  28
  29 ThreadPool *thread_pool_new(struct AioContext *ctx);
  30 void thread_pool_free(ThreadPool *pool);
  31
  32 /*
  33  * thread_pool_submit* API: submit I/O requests in the thread's
  34  * current AioContext.
  35  */
  36 BlockAIOCB *thread_pool_submit_aio(ThreadPool *pool,
  37         ThreadPoolFunc *func, void *arg,
  38         BlockCompletionFunc *cb, void *opaque);
  39 int coroutine_fn thread_pool_submit_co(ThreadPool *pool,
  40         ThreadPoolFunc *func, void *arg);
  41 void thread_pool_submit(ThreadPool *pool, ThreadPoolFunc *func, void *arg);
  42
  43 void thread_pool_update_params(ThreadPool *pool, struct AioContext *ctx);
  44
  45 #endif