1 files changed, 102 insertions, 0 deletions
diff --git a/base/thread_posix.cc b/base/thread_posix.cc
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+++ b/base/thread_posix.cc
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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "base/thread.h"
+
+#include "base/message_loop.h"
+#include "base/ref_counted.h"
+#include "base/string_util.h"
+
+// This task is used to trigger the message loop to exit.
+class ThreadQuitTask : public Task {
+ public:
+  virtual void Run() {
+    MessageLoop::current()->Quit();
+#ifndef NDEBUG
+    Thread::SetThreadWasQuitProperly(true);
+#endif
+  }
+};
+
+Thread::Thread(const char *name)
+    : thread_id_(0),
+      message_loop_(NULL),
+      name_(name) {
+  DCHECK(tls_index_) << "static initializer failed";
+}
+
+Thread::~Thread() {
+  Stop();
+}
+
+void* ThreadFunc(void* closure) {
+  // TODO(pinkerton): I have no clue what to do here
+  
+  pthread_exit(NULL);
+}
+
+// We use this thread-local variable to record whether or not a thread exited
+// because its Stop method was called.  This allows us to catch cases where
+// MessageLoop::Quit() is called directly, which is unexpected when using a
+// Thread to setup and run a MessageLoop.
+// Note that if we start doing complex stuff in other static initializers
+// this could cause problems.
+TLSSlot Thread::tls_index_ = ThreadLocalStorage::Alloc();
+
+void Thread::SetThreadWasQuitProperly(bool flag) {
+  ThreadLocalStorage::Set(tls_index_, reinterpret_cast<void*>(flag));
+}
+
+bool Thread::GetThreadWasQuitProperly() {
+  return (ThreadLocalStorage::Get(tls_index_) != 0);
+}
+
+
+bool Thread::Start() {
+  bool success = false;
+  int result = pthread_create(&thread_id_, NULL, ThreadFunc, &message_loop_);
+  if (!result)
+    success = true;
+  
+  return success;
+}
+
+void Thread::Stop() {
+//  DCHECK_NE(thread_id_, GetCurrentThreadId())
+//             << "Can't call Stop() on itself";
+
+  // We had better have a message loop at this point!  If we do not, then it
+  // most likely means that the thread terminated unexpectedly, probably due
+  // to someone calling Quit() on our message loop directly.
+  DCHECK(message_loop_);
+
+  message_loop_->PostTask(FROM_HERE, new ThreadQuitTask());
+
+  message_loop_ = NULL;
+}