Include RE2 library

third_party/re2/util/thread.cc

+// Copyright 2009 The RE2 Authors.  All Rights Reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include <pthread.h>
+
+#include "util/util.h"
+#include "util/thread.h"
+
+Thread::Thread() {
+  pid_ = 0;
+  running_ = 0;
+  joinable_ = 0;
+}
+
+Thread::~Thread() {
+}
+
+void *startThread(void *v) {
+  Thread* t = (Thread*)v;
+  t->Run();
+  return 0;
+}
+
+void Thread::Start() {
+  CHECK(!running_);
+  pthread_create(&pid_, 0, startThread, this);
+  running_ = true;
+  if (!joinable_)
+    pthread_detach(pid_);
+}
+
+void Thread::Join() {
+  CHECK(running_);
+  CHECK(joinable_);
+  void *val;
+  pthread_join(pid_, &val);
+  running_ = 0;
+}
+
+void Thread::SetJoinable(bool j) {
+  CHECK(!running_);
+  joinable_ = j;
+}