Windows support in thread::hardware_concurrency.
llvm-svn: 185451
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: ca69356d52bd1f1abfd57686be5fb13648fb9e46
diff --git a/src/thread.cpp b/src/thread.cpp
index 5bf7414..1fd8bb0 100644
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -23,6 +23,9 @@
#if defined(__NetBSD__)
#pragma weak pthread_create // Do not create libpthread dependency
#endif
+#if defined(_WIN32)
+#include <windows.h>
+#endif
_LIBCPP_BEGIN_NAMESPACE_STD
@@ -79,6 +82,10 @@
if (result < 0)
return 0;
return static_cast<unsigned>(result);
+#elif defined(_WIN32)
+ SYSTEM_INFO info;
+ GetSystemInfo(&info);
+ return info.dwNumberOfProcessors;
#else // defined(CTL_HW) && defined(HW_NCPU)
// TODO: grovel through /proc or check cpuid on x86 and similar
// instructions on other architectures.