This emulates Win32 manual-reset events using futexes or conditional variables. Typical ways to use them are with multi-producer, single-consumer data structures, to test for a complex condition whose elements come from different threads: for (;;) { qemu_event_reset(ev); ... test complex condition ... if (condition is true) { break; } qemu_event_wait(ev); } Or more efficiently (but with some duplication): ... evaluate condition ... while (!condition) { qemu_event_reset(ev); ... evaluate condition ... if (!condition) { qemu_event_wait(ev); ... evaluate condition ... } } QemuEvent provides a very fast userspace path in the common case when no other thread is waiting, or the event is not changing state. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
||
---|---|---|
.. | ||
acl.c | ||
aes.c | ||
bitmap.c | ||
bitops.c | ||
cache-utils.c | ||
compatfd.c | ||
crc32c.c | ||
cutils.c | ||
envlist.c | ||
error.c | ||
event_notifier-posix.c | ||
event_notifier-win32.c | ||
fifo8.c | ||
hbitmap.c | ||
hexdump.c | ||
host-utils.c | ||
iov.c | ||
Makefile.objs | ||
module.c | ||
notify.c | ||
osdep.c | ||
oslib-posix.c | ||
oslib-win32.c | ||
path.c | ||
qemu-config.c | ||
qemu-error.c | ||
qemu-openpty.c | ||
qemu-option.c | ||
qemu-progress.c | ||
qemu-sockets.c | ||
qemu-thread-posix.c | ||
qemu-thread-win32.c | ||
qemu-timer-common.c | ||
throttle.c | ||
unicode.c | ||
uri.c |