src/oat/runtime/support_locks.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 "callee_save_frame.h"
#include "object.h"

namespace art {

extern "C" int artUnlockObjectFromCode(Object* obj, Thread* self, Method** sp)
    UNLOCK_FUNCTION(monitor_lock_) {
  FinishCalleeSaveFrameSetup(self, sp, Runtime::kRefsOnly);
  DCHECK(obj != NULL);  // Assumed to have been checked before entry
  // MonitorExit may throw exception
  return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */;
}

extern "C" void artLockObjectFromCode(Object* obj, Thread* thread, Method** sp)
    EXCLUSIVE_LOCK_FUNCTION(monitor_lock_) {
  FinishCalleeSaveFrameSetup(thread, sp, Runtime::kRefsOnly);
  DCHECK(obj != NULL);        // 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());
}

}  // namespace art