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aio-posix: split aio_dispatch_handlers out of aio_dispatch

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This simplifies the handling of dispatch_fds.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20170112180800.21085-6-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-01-12 19:07:55 +01:00 committed by Stefan Hajnoczi
parent fbcc3e5004
commit 56d2c3c60d
1 changed files with 25 additions and 18 deletions
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41
aio-posix.c
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@ -367,31 +367,16 @@ bool aio_pending(AioContext *ctx)
return false; return false;
} }
/* static bool aio_dispatch_handlers(AioContext *ctx)
* Note that dispatch_fds == false has the side-effect of post-poning the
* freeing of deleted handlers.
*/
bool aio_dispatch(AioContext *ctx, bool dispatch_fds)
{ {
AioHandler *node = NULL; AioHandler *node;
bool progress = false; bool progress = false;
/*
* If there are callbacks left that have been queued, we need to call them.
* Do not call select in this case, because it is possible that the caller
* does not need a complete flush (as is the case for aio_poll loops).
*/
if (aio_bh_poll(ctx)) {
progress = true;
}
/* /*
* We have to walk very carefully in case aio_set_fd_handler is * We have to walk very carefully in case aio_set_fd_handler is
* called while we're walking. * called while we're walking.
*/ */
if (dispatch_fds) {
node = QLIST_FIRST(&ctx->aio_handlers); node = QLIST_FIRST(&ctx->aio_handlers);
}
while (node) { while (node) {
AioHandler *tmp; AioHandler *tmp;
int revents; int revents;
@ -431,6 +416,28 @@ bool aio_dispatch(AioContext *ctx, bool dispatch_fds)
} }
} }
return progress;
}
/*
* Note that dispatch_fds == false has the side-effect of post-poning the
* freeing of deleted handlers.
*/
bool aio_dispatch(AioContext *ctx, bool dispatch_fds)
{
bool progress;
/*
* If there are callbacks left that have been queued, we need to call them.
* Do not call select in this case, because it is possible that the caller
* does not need a complete flush (as is the case for aio_poll loops).
*/
progress = aio_bh_poll(ctx);
if (dispatch_fds) {
progress |= aio_dispatch_handlers(ctx);
}
/* Run our timers */ /* Run our timers */
progress |= timerlistgroup_run_timers(&ctx->tlg); progress |= timerlistgroup_run_timers(&ctx->tlg);