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authorStefan Hajnoczi <stefanha@redhat.com>2014-03-03 11:30:04 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2014-03-13 14:42:24 +0100
commit98563fc3ec44c1becce6f1720ad6b0a82ed101b4 (patch)
tree18adf9c0239707158d5f95ef2e0702c5eeaa29b8 /target-lm32/cpu-qom.h
parent2da61b671eb89fcaa306738f44eed472977d6587 (diff)
aio: add aio_context_acquire() and aio_context_release()
It can be useful to run an AioContext from a thread which normally does not "own" the AioContext. For example, request draining can be implemented by acquiring the AioContext and looping aio_poll() until all requests have been completed. The following pattern should work: /* Event loop thread */ while (running) { aio_context_acquire(ctx); aio_poll(ctx, true); aio_context_release(ctx); } /* Another thread */ aio_context_acquire(ctx); bdrv_read(bs, 0x1000, buf, 1); aio_context_release(ctx); This patch implements aio_context_acquire() and aio_context_release(). Note that existing aio_poll() callers do not need to worry about acquiring and releasing - it is only needed when multiple threads will call aio_poll() on the same AioContext. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'target-lm32/cpu-qom.h')
0 files changed, 0 insertions, 0 deletions