libcxx initial import

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-11 19:42:16 +00:00
commit bc8d3f97eb
3893 changed files with 1209942 additions and 0 deletions
--- a/src/thread.cpp
+++ b/src/thread.cpp
@@ -0,0 +1,73 @@
+//===------------------------- thread.cpp----------------------------------===//
+//
+// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "thread"
+#include "exception"
+#include <sys/sysctl.h>
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+thread::~thread()
+{
+    if (__t_ != nullptr)
+        terminate();
+}
+
+void
+thread::join()
+{
+    int ec = pthread_join(__t_, 0);
+    if (ec)
+        throw system_error(error_code(ec, system_category()), "thread::join failed");
+    __t_ = nullptr;
+}
+
+void
+thread::detach()
+{
+    int ec = EINVAL;
+    if (__t_ != 0)
+    {
+        ec = pthread_detach(__t_);
+        if (ec == 0)
+            __t_ = 0;
+    }
+    if (ec)
+        throw system_error(error_code(ec, system_category()), "thread::detach failed");
+}
+
+unsigned
+thread::hardware_concurrency()
+{
+    int n;
+    int mib[2] = {CTL_HW, HW_NCPU};
+    std::size_t s = sizeof(n);
+    sysctl(mib, 2, &n, &s, 0, 0);
+    return n;
+}
+
+namespace this_thread
+{
+
+void
+sleep_for(const chrono::nanoseconds& ns)
+{
+    using namespace chrono;
+    if (ns >= nanoseconds::zero())
+    {
+        timespec ts;
+        ts.tv_sec = static_cast<decltype(ts.tv_sec)>(duration_cast<seconds>(ns).count());
+        ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((ns - seconds(ts.tv_sec)).count());
+        nanosleep(&ts, 0);
+    }
+}
+
+}  // this_thread
+
+_LIBCPP_END_NAMESPACE_STD