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libstdc++: testsuite: tolerate non-cancelling sleep 

Though sleep, nanosleep and clock_nanosleep are all POSIX cancellation
points, not all target systems follow this POSIX requirement.
30_threads/thread/native_handle/cancel.cc will run until it times out
on such systems.

Rather than failing a C++ library test because of a limitation of the
target system, this patch gives the test a chance to successfully
exercise the features it intends to exercise, by introducing a
cancellation point in a loop that would otherwise run indefinitely on
systems exhibiting this limitation.


for  libstdc++-v3/ChangeLog

	* testsuite/30_threads/thread/native_handle/cancel.cc: Add an
	explicit cancellation point in case sleep_for lacks one.
This commit is contained in:
Alexandre Oliva 2022-06-23 23:20:46 -03:00 committed by Alexandre Oliva
parent a5bba80e32
commit 0b2c1781db
1 changed files with 5 additions and 1 deletions
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6
libstdc++-v3/testsuite/30_threads/thread/native_handle/cancel.cc
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@ -30,7 +30,11 @@ void f(std::atomic<bool>& started)
{
started = true;
while (true)
std::this_thread::sleep_for(std::chrono::milliseconds(100));
{
std::this_thread::sleep_for(std::chrono::milliseconds(100));
// In case the target system doesn't make sleep a cancellation point...
pthread_testcancel();
}
}
int main()