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    NO_THREAD_SAFETY_ANALYSIS
25    REQUIRES(!Roles::uninterruptible_)
26    SHARED_REQUIRES(Locks::mutator_lock_) /* EXCLUSIVE_LOCK_FUNCTION(Monitor::monitor_lock_) */ {
27  ScopedQuickEntrypointChecks sqec(self);
28  if (UNLIKELY(obj == nullptr)) {
29    ThrowNullPointerException("Null reference used for synchronization (monitor-enter)");
30    return -1;  // Failure.
31  } else {
32    if (kIsDebugBuild) {
33      obj = obj->MonitorEnter(self);  // May block
34      CHECK(self->HoldsLock(obj));
35      CHECK(!self->IsExceptionPending());
36    } else {
37      obj->MonitorEnter(self);  // May block
38    }
39    return 0;  // Success.
40    // Only possible exception is NPE and is handled before entry
41  }
42}
43
44extern "C" int artUnlockObjectFromCode(mirror::Object* obj, Thread* self)
45    NO_THREAD_SAFETY_ANALYSIS
46    REQUIRES(!Roles::uninterruptible_)
47    SHARED_REQUIRES(Locks::mutator_lock_) /* UNLOCK_FUNCTION(Monitor::monitor_lock_) */ {
48  ScopedQuickEntrypointChecks sqec(self);
49  if (UNLIKELY(obj == nullptr)) {
50    ThrowNullPointerException("Null reference used for synchronization (monitor-exit)");
51    return -1;  // Failure.
52  } else {
53    // MonitorExit may throw exception.
54    return obj->MonitorExit(self) ? 0 /* Success */ : -1 /* Failure */;
55  }
56}
57
58}  // namespace art
59