| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: libcpp-has-no-threads |
| |
| // This test uses the POSIX header <sys/time.h> which Windows doesn't provide |
| // UNSUPPORTED: windows |
| |
| // Until 58a0a70fb2f1, this_thread::sleep_for misbehaves when interrupted by |
| // a signal, as tested here. Disable the test on the corresponding system |
| // libraries. |
| // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11}} |
| |
| // TODO(ldionne): This test fails on Ubuntu Focal on our CI nodes (and only there), in 32 bit mode. |
| // UNSUPPORTED: linux && 32bits-on-64bits |
| |
| // <thread> |
| |
| // template <class Rep, class Period> |
| // void sleep_for(const chrono::duration<Rep, Period>& rel_time); |
| |
| // This test ensures that we sleep for the right amount of time even when |
| // we get interrupted by a signal, as fixed in 58a0a70fb2f1. |
| |
| #include <thread> |
| #include <cassert> |
| #include <chrono> |
| #include <cstring> // for std::memset |
| |
| #include <signal.h> |
| #include <sys/time.h> |
| |
| #include "test_macros.h" |
| |
| void sig_action(int) {} |
| |
| int main(int, char**) |
| { |
| int ec; |
| struct sigaction action; |
| action.sa_handler = &sig_action; |
| sigemptyset(&action.sa_mask); |
| action.sa_flags = 0; |
| |
| ec = sigaction(SIGALRM, &action, nullptr); |
| assert(!ec); |
| |
| struct itimerval it; |
| std::memset(&it, 0, sizeof(itimerval)); |
| it.it_value.tv_sec = 0; |
| it.it_value.tv_usec = 250000; |
| // This will result in a SIGALRM getting fired resulting in the nanosleep |
| // inside sleep_for getting EINTR. |
| ec = setitimer(ITIMER_REAL, &it, nullptr); |
| assert(!ec); |
| |
| typedef std::chrono::system_clock Clock; |
| typedef Clock::time_point time_point; |
| std::chrono::milliseconds ms(500); |
| time_point t0 = Clock::now(); |
| std::this_thread::sleep_for(ms); |
| time_point t1 = Clock::now(); |
| // NOTE: Operating systems are (by default) best effort and therefore we may |
| // have slept longer, perhaps much longer than we requested. |
| assert(t1 - t0 >= ms); |
| |
| return 0; |
| } |