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authorPaolo Bonzini <pbonzini@redhat.com>2012-02-23 13:23:34 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2012-10-31 10:37:48 +0100
commitd354c7eccf5466ec2715a03d3f33dbfd6680dcc5 (patch)
tree1c77f58c201cb14dc7f13d45a1e4cd70ce2f30d9 /qint.c
parent38b14db34e16bb0ae1f28b7ddccb6aa11a2a96a1 (diff)
downloadqemu-d354c7eccf5466ec2715a03d3f33dbfd6680dcc5.tar.gz
aio: add generic thread-pool facility
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>
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