runtime/entrypoints/portable/portable_lock_entrypoints.cc

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "entrypoints/entrypoint_utils-inl.h"
#include "mirror/object-inl.h"

namespace art {

extern "C" void art_portable_lock_object_from_code(mirror::Object* obj, Thread* thread)
    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
    NO_THREAD_SAFETY_ANALYSIS /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ {
  DCHECK(obj != nullptr);        // Assumed to have been checked before entry.
  obj->MonitorEnter(thread);  // May block.
  DCHECK(thread->HoldsLock(obj));
  // Only possible exception is NPE and is handled before entry.
  DCHECK(!thread->IsExceptionPending());
}

extern "C" void art_portable_unlock_object_from_code(mirror::Object* obj, Thread* thread)
    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
    NO_THREAD_SAFETY_ANALYSIS /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ {
  DCHECK(obj != nullptr);  // Assumed to have been checked before entry.
  // MonitorExit may throw exception.
  obj->MonitorExit(thread);
}

}  // namespace art