66 lines
2.4 KiB
C++
66 lines
2.4 KiB
C++
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "callee_save_frame.h"
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#include "common_throws.h"
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#include "mirror/object-inl.h"
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namespace art {
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extern "C" int artLockObjectFromCode(mirror::Object* obj, Thread* self)
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NO_THREAD_SAFETY_ANALYSIS
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REQUIRES(!Roles::uninterruptible_)
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REQUIRES_SHARED(Locks::mutator_lock_) /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ {
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ScopedQuickEntrypointChecks sqec(self);
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if (UNLIKELY(obj == nullptr)) {
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ThrowNullPointerException("Null reference used for synchronization (monitor-enter)");
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return -1; // Failure.
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} else {
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ObjPtr<mirror::Object> object = obj->MonitorEnter(self); // May block
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DCHECK(self->HoldsLock(object));
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// Exceptions can be thrown by monitor event listeners. This is expected to be rare however.
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if (UNLIKELY(self->IsExceptionPending())) {
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// TODO Remove this DCHECK if we expand the use of monitor callbacks.
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DCHECK(Runtime::Current()->HasLoadedPlugins())
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<< "Exceptions are only expected to be thrown by plugin code which doesn't seem to be "
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<< "loaded.";
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// We need to get rid of the lock
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bool unlocked = object->MonitorExit(self);
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DCHECK(unlocked);
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return -1; // Failure.
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} else {
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DCHECK(self->HoldsLock(object));
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return 0; // Success.
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}
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}
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}
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extern "C" int artUnlockObjectFromCode(mirror::Object* obj, Thread* self)
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NO_THREAD_SAFETY_ANALYSIS
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REQUIRES(!Roles::uninterruptible_)
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REQUIRES_SHARED(Locks::mutator_lock_) /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ {
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ScopedQuickEntrypointChecks sqec(self);
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if (UNLIKELY(obj == nullptr)) {
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ThrowNullPointerException("Null reference used for synchronization (monitor-exit)");
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return -1; // Failure.
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} else {
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// MonitorExit may throw exception.
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return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */;
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}
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}
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} // namespace art
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