jamesge commented on code in PR #2086:
URL: https://github.com/apache/brpc/pull/2086#discussion_r1086221251
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src/bthread/butex.cpp:
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@@ -137,27 +137,41 @@ static void wakeup_pthread(ButexPthreadWaiter* pw) {
bool erase_from_butex(ButexWaiter*, bool, WaiterState);
-int wait_pthread(ButexPthreadWaiter& pw, timespec* ptimeout) {
+int wait_pthread(ButexPthreadWaiter& pw, const timespec* abstime) {
+ timespec* ptimeout = NULL;
+ timespec timeout;
+ int64_t timeout_us = 0;
+ int rc;
+
while (true) {
- const int rc = futex_wait_private(&pw.sig, PTHREAD_NOT_SIGNALLED,
ptimeout);
- if (PTHREAD_NOT_SIGNALLED != pw.sig.load(butil::memory_order_acquire))
{
- // If `sig' is changed, wakeup_pthread() must be called and `pw'
- // is already removed from the butex.
- // Acquire fence makes this thread sees changes before wakeup.
- return rc;
+ if (abstime != NULL) {
+ timeout_us = butil::timespec_to_microseconds(*abstime) -
butil::gettimeofday_us();
+ timeout = butil::microseconds_to_timespec(timeout_us);
Review Comment:
这个timeout在下文中有用到么？
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