locks.h revision d07ed7df4ec9338f97f12627690d58ed9b34f25b
1a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten/* 2a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * Copyright (C) 2010 The Android Open Source Project 3a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * 4a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * Licensed under the Apache License, Version 2.0 (the "License"); 5a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * you may not use this file except in compliance with the License. 6a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * You may obtain a copy of the License at 7a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * 8a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * http://www.apache.org/licenses/LICENSE-2.0 9a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * 10a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * Unless required by applicable law or agreed to in writing, software 11a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * distributed under the License is distributed on an "AS IS" BASIS, 12a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * See the License for the specific language governing permissions and 14a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten * limitations under the License. 15a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten */ 16a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 17a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kastenextern void object_lock_exclusive(IObject *this); 18a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kastenextern void object_unlock_exclusive(IObject *this); 19a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kastenextern void object_cond_wait(IObject *this); 20a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kastenextern void object_cond_signal(IObject *this); 21a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 22a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten// Currently shared locks are implemented as exclusive, but don't count on it 23a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 24a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten#define object_lock_shared(this) object_lock_exclusive(this) 25a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten#define object_unlock_shared(this) object_unlock_exclusive(this) 26a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 27d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten// Currently interface locks are actually on whole object, but don't count on it. 28d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten// These operations are undefined on IObject, as it lacks an mThis. 29d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten// If you have an IObject, then use the object_ functions instead. 30a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 31d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten#define interface_lock_exclusive(this) object_lock_exclusive(InterfaceToIObject(this)) 32d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten#define interface_unlock_exclusive(this) object_unlock_exclusive(InterfaceToIObject(this)) 33d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten#define interface_lock_shared(this) object_lock_shared(InterfaceToIObject(this)) 34d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten#define interface_unlock_shared(this) object_unlock_shared(InterfaceToIObject(this)) 35d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten#define interface_cond_wait(this) object_cond_wait(InterfaceToIObject(this)) 36d07ed7df4ec9338f97f12627690d58ed9b34f25bGlenn Kasten#define interface_cond_signal(this) object_cond_signal(InterfaceToIObject(this)) 37a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 38a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten// Peek and poke are an optimization for small atomic fields that don't "matter" 39a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten 403a413f1863daa026ed2b9fc9eac01e1341116cdbGlenn Kasten#define object_lock_peek(this) /* object_lock_shared(this) */ 413a413f1863daa026ed2b9fc9eac01e1341116cdbGlenn Kasten#define object_unlock_peek(this) /* object_unlock_shared(this) */ 42a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten#define interface_lock_poke(this) /* interface_lock_exclusive(this) */ 43a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten#define interface_unlock_poke(this) /* interface_unlock_exclusive(this) */ 44a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten#define interface_lock_peek(this) /* interface_lock_shared(this) */ 45a6d984c32855a239f7f79a3d3b7f2ddfb8cb9697Glenn Kasten#define interface_unlock_peek(this) /* interface_unlock_shared(this) */ 46