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main-loop: Calculate poll timeout using timeout argument

The timeout argument was unused up to now,
but it can be used to reduce the poll_timeout when it is infinite
(negative value) or larger than timeout.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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1 parent 1b29604 commit 3239ad04695f95ce060bdc2a0a6e1243d2068971 @stweil stweil committed with blueswirl Apr 29, 2012
Showing with 5 additions and 1 deletion.
  1. +5 −1 main-loop.c
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@@ -425,7 +425,7 @@ static int os_host_main_loop_wait(uint32_t timeout)
if (nfds >= 0) {
ret = select(nfds + 1, &rfds, &wfds, &xfds, &tv0);
if (ret != 0) {
- /* TODO. */
+ timeout = 0;
}
}
@@ -439,6 +439,10 @@ static int os_host_main_loop_wait(uint32_t timeout)
poll_fds[n_poll_fds + i].events = G_IO_IN;
}
+ if (poll_timeout < 0 || timeout < poll_timeout) {
+ poll_timeout = timeout;
+ }
+
qemu_mutex_unlock_iothread();
ret = g_poll(poll_fds, n_poll_fds + w->num, poll_timeout);
qemu_mutex_lock_iothread();

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