1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "callee_save_frame.h"
18#include "common_throws.h"
19#include "mirror/object-inl.h"
20
21namespace art {
22
23extern "C" int artLockObjectFromCode(mirror::Object* obj, Thread* self)
24    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
25    NO_THREAD_SAFETY_ANALYSIS /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ {
26  ScopedQuickEntrypointChecks sqec(self);
27  if (UNLIKELY(obj == nullptr)) {
28    ThrowNullPointerException("Null reference used for synchronization (monitor-enter)");
29    return -1;  // Failure.
30  } else {
31    if (kIsDebugBuild) {
32      obj = obj->MonitorEnter(self);  // May block
33      CHECK(self->HoldsLock(obj));
34      CHECK(!self->IsExceptionPending());
35    } else {
36      obj->MonitorEnter(self);  // May block
37    }
38    return 0;  // Success.
39    // Only possible exception is NPE and is handled before entry
40  }
41}
42
43extern "C" int artUnlockObjectFromCode(mirror::Object* obj, Thread* self)
44    SHARED_LOCKS_REQUIRED(Locks::mutator_lock_)
45    NO_THREAD_SAFETY_ANALYSIS /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ {
46  ScopedQuickEntrypointChecks sqec(self);
47  if (UNLIKELY(obj == nullptr)) {
48    ThrowNullPointerException("Null reference used for synchronization (monitor-exit)");
49    return -1;  // Failure.
50  } else {
51    // MonitorExit may throw exception.
52    return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */;
53  }
54}
55
56}  // namespace art
57