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author | Saleem Abdulrasool <compnerd@compnerd.org> | 2017-01-07 02:48:30 +0000 |
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committer | Saleem Abdulrasool <compnerd@compnerd.org> | 2017-01-07 02:48:30 +0000 |
commit | cc1d780758e3759212d452e7d71da75bb3b2c076 (patch) | |
tree | 8052c355b37ce5e990a70d7460b5a81e0939744e | |
parent | 2342c11c50e53c34dd1f5137513d96e9eba9eb3b (diff) | |
download | external_libcxx-cc1d780758e3759212d452e7d71da75bb3b2c076.tar.gz external_libcxx-cc1d780758e3759212d452e7d71da75bb3b2c076.tar.bz2 external_libcxx-cc1d780758e3759212d452e7d71da75bb3b2c076.zip |
thread: implement sleep_for on Windows
Windows does not provide an implementation of `nanosleep`. Round up the
time duration to the nearest ms and use `Sleep`. Although this may
over-sleep, there is no hard real-time guarantee on the wake, so
sleeping a bit more is better than under-sleeping as it within the
specification.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@291331 91177308-0d34-0410-b5e6-96231b3b80d8
-rw-r--r-- | src/thread.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/thread.cpp b/src/thread.cpp index 4fb1dd21f..290e2aef9 100644 --- a/src/thread.cpp +++ b/src/thread.cpp @@ -117,6 +117,12 @@ sleep_for(const chrono::nanoseconds& ns) using namespace chrono; if (ns > nanoseconds::zero()) { +#if defined(_LIBCPP_WIN32API) + milliseconds ms = duration_cast<milliseconds>(ns); + if (ns > duration_cast<nanoseconds>(ms)) + ++ms; + Sleep(ms.count()); +#else seconds s = duration_cast<seconds>(ns); timespec ts; typedef decltype(ts.tv_sec) ts_sec; @@ -134,6 +140,7 @@ sleep_for(const chrono::nanoseconds& ns) while (nanosleep(&ts, &ts) == -1 && errno == EINTR) ; +#endif } } |