EDK: Move mutex.*, cond_var.*, and thread_annotations.h to //mojo/edk/util.

mojo/edk/system/mutex.cc

-// Copyright 2015 The Chromium 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 "mojo/edk/system/mutex.h"
-
-#if !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)
-#include <errno.h>
-#include <string.h>
-
-#include "base/logging.h"
-
-namespace mojo {
-namespace system {
-
-Mutex::Mutex() {
-  pthread_mutexattr_t attr;
-  int error = pthread_mutexattr_init(&attr);
-  DCHECK(!error) << "pthread_mutexattr_init: " << strerror(error);
-  error = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK);
-  DCHECK(!error) << "pthread_mutexattr_settype: " << strerror(error);
-  error = pthread_mutex_init(&impl_, &attr);
-  DCHECK(!error) << "pthread_mutex_init: " << strerror(error);
-  error = pthread_mutexattr_destroy(&attr);
-  DCHECK(!error) << "pthread_mutexattr_destroy: " << strerror(error);
-}
-
-Mutex::~Mutex() {
-  int error = pthread_mutex_destroy(&impl_);
-  DCHECK(!error) << "pthread_mutex_destroy: " << strerror(error);
-}
-
-void Mutex::Lock() MOJO_EXCLUSIVE_LOCK_FUNCTION() {
-  int error = pthread_mutex_lock(&impl_);
-  DCHECK(!error) << "pthread_mutex_lock: " << strerror(error);
-}
-
-void Mutex::Unlock() MOJO_UNLOCK_FUNCTION() {
-  int error = pthread_mutex_unlock(&impl_);
-  DCHECK(!error) << "pthread_mutex_unlock: " << strerror(error);
-}
-
-bool Mutex::TryLock() MOJO_EXCLUSIVE_TRYLOCK_FUNCTION(true) {
-  int error = pthread_mutex_trylock(&impl_);
-  DCHECK(!error || error == EBUSY) << "pthread_mutex_trylock: "
-                                   << strerror(error);
-  return !error;
-}
-
-void Mutex::AssertHeld() MOJO_ASSERT_EXCLUSIVE_LOCK() {
-  int error = pthread_mutex_lock(&impl_);
-  DCHECK_EQ(error, EDEADLK) << ". pthread_mutex_lock: " << strerror(error);
-}
-
-}  // namespace system
-}  // namespace mojo
-
-#endif  // !defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)