Add libc++ and libc++abi to third-party.

third_party/libcxx/src/condition_variable.cpp

+//===-------------------- condition_variable.cpp --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "condition_variable"
+#include "thread"
+#include "system_error"
+#include "cassert"
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+condition_variable::~condition_variable()
+{
+    pthread_cond_destroy(&__cv_);
+}
+
+void
+condition_variable::notify_one() _NOEXCEPT
+{
+    pthread_cond_signal(&__cv_);
+}
+
+void
+condition_variable::notify_all() _NOEXCEPT
+{
+    pthread_cond_broadcast(&__cv_);
+}
+
+void
+condition_variable::wait(unique_lock<mutex>& lk)
+{
+    if (!lk.owns_lock())
+        __throw_system_error(EPERM,
+                                  "condition_variable::wait: mutex not locked");
+    int ec = pthread_cond_wait(&__cv_, lk.mutex()->native_handle());
+    if (ec)
+        __throw_system_error(ec, "condition_variable wait failed");
+}
+
+void
+condition_variable::__do_timed_wait(unique_lock<mutex>& lk,
+               chrono::time_point<chrono::system_clock, chrono::nanoseconds> tp)
+{
+    using namespace chrono;
+    if (!lk.owns_lock())
+        __throw_system_error(EPERM,
+                            "condition_variable::timed wait: mutex not locked");
+    nanoseconds d = tp.time_since_epoch();
+    if (d > nanoseconds(0x59682F000000E941))
+        d = nanoseconds(0x59682F000000E941);
+    timespec ts;
+    seconds s = duration_cast<seconds>(d);
+    typedef decltype(ts.tv_sec) ts_sec;
+    _LIBCPP_CONSTEXPR ts_sec ts_sec_max = numeric_limits<ts_sec>::max();
+    if (s.count() < ts_sec_max)
+    {
+        ts.tv_sec = static_cast<ts_sec>(s.count());
+        ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((d - s).count());
+    }
+    else
+    {
+        ts.tv_sec = ts_sec_max;
+        ts.tv_nsec = giga::num - 1;
+    }
+    int ec = pthread_cond_timedwait(&__cv_, lk.mutex()->native_handle(), &ts);
+    if (ec != 0 && ec != ETIMEDOUT)
+        __throw_system_error(ec, "condition_variable timed_wait failed");
+}
+
+void
+notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk)
+{
+    __thread_local_data()->notify_all_at_thread_exit(&cond, lk.release());
+}
+
+_LIBCPP_END_NAMESPACE_STD