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/*
* 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 "common_throws.h"
#include "mirror/object-inl.h"
namespace art {
extern "C" int artLockObjectFromCode(mirror::Object* obj, Thread* self)
NO_THREAD_SAFETY_ANALYSIS
REQUIRES(!Roles::uninterruptible_)
REQUIRES_SHARED(Locks::mutator_lock_) /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ {
ScopedQuickEntrypointChecks sqec(self);
if (UNLIKELY(obj == nullptr)) {
ThrowNullPointerException("Null reference used for synchronization (monitor-enter)");
return -1; // Failure.
} else {
ObjPtr<mirror::Object> object = obj->MonitorEnter(self); // May block
DCHECK(self->HoldsLock(object));
// Exceptions can be thrown by monitor event listeners. This is expected to be rare however.
if (UNLIKELY(self->IsExceptionPending())) {
// TODO Remove this DCHECK if we expand the use of monitor callbacks.
DCHECK(Runtime::Current()->HasLoadedPlugins())
<< "Exceptions are only expected to be thrown by plugin code which doesn't seem to be "
<< "loaded.";
// We need to get rid of the lock
bool unlocked = object->MonitorExit(self);
DCHECK(unlocked);
return -1; // Failure.
} else {
DCHECK(self->HoldsLock(object));
return 0; // Success.
}
}
}
extern "C" int artUnlockObjectFromCode(mirror::Object* obj, Thread* self)
NO_THREAD_SAFETY_ANALYSIS
REQUIRES(!Roles::uninterruptible_)
REQUIRES_SHARED(Locks::mutator_lock_) /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ {
ScopedQuickEntrypointChecks sqec(self);
if (UNLIKELY(obj == nullptr)) {
ThrowNullPointerException("Null reference used for synchronization (monitor-exit)");
return -1; // Failure.
} else {
// MonitorExit may throw exception.
return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */;
}
}
} // namespace art
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