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d354c7eccf
Add a generic thread-pool. The code is roughly based on posix-aio-compat.c, with some changes, especially the following: - use QemuSemaphore instead of QemuCond; - separate the state of the thread from the return code of the worker function. The return code is totally opaque for the thread pool; - do not busy wait when doing cancellation. A more generic threadpool (but still specific to I/O so that in the future it can use special scheduling classes or PI mutexes) can have many uses: it allows more flexibility in raw-posix.c and can more easily be extended to Win32, and it will also be used to do an msync of the persistent bitmap. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
35 lines
955 B
C
35 lines
955 B
C
/*
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* QEMU block layer thread pool
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*
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* Copyright IBM, Corp. 2008
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* Copyright Red Hat, Inc. 2012
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Paolo Bonzini <pbonzini@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#ifndef QEMU_THREAD_POOL_H
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#define QEMU_THREAD_POOL_H 1
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#include "qemu-common.h"
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#include "qemu-queue.h"
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#include "qemu-thread.h"
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#include "qemu-coroutine.h"
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#include "block_int.h"
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typedef int ThreadPoolFunc(void *opaque);
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BlockDriverAIOCB *thread_pool_submit_aio(ThreadPoolFunc *func, void *arg,
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BlockDriverCompletionFunc *cb, void *opaque);
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int coroutine_fn thread_pool_submit_co(ThreadPoolFunc *func, void *arg);
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void thread_pool_submit(ThreadPoolFunc *func, void *arg);
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#endif
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