https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80538
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- Author: redi Date: Thu Oct 11 16:37:23 2018 New Revision: 265044 URL: https://gcc.gnu.org/viewcvs?rev=265044&root=gcc&view=rev Log: PR libstdc++/80538 Only call sleep for non-zero values Avoid a system call when no sleep is required. Sleep in a loop (actually two loops) to handle interruption by signals. PR libstdc++/80538 * src/c++11/thread.cc (this_thread::__sleep_for) [_GLIBCXX_HAVE_SLEEP]: Only call sleep for non-zero values. Loop while sleep call is interrupted and until steady_clock shows requested duration has elapsed. (!_GLIBCXX_HAVE_USLEEP]: Use the _GLIBCXX_HAVE_SLEEP code path, but avoiding the usleep call. * testsuite/30_threads/this_thread/60421.cc: Test repeated signal interruptions. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/src/c++11/thread.cc trunk/libstdc++-v3/testsuite/30_threads/this_thread/60421.cc
