/*
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* Copyright (C) 2010 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 "Configuration.h"
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/** \file locks.h Mutual exclusion and condition variables */
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#ifdef USE_DEBUG
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extern void object_lock_exclusive_(IObject *thiz, const char *file, int line);
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extern void object_unlock_exclusive_(IObject *thiz, const char *file, int line);
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extern void object_unlock_exclusive_attributes_(IObject *thiz, unsigned attr,
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const char *file, int line);
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extern void object_cond_wait_(IObject *thiz, const char *file, int line);
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#else
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extern void object_lock_exclusive(IObject *thiz);
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extern void object_unlock_exclusive(IObject *thiz);
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extern void object_unlock_exclusive_attributes(IObject *thiz, unsigned attr);
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extern void object_cond_wait(IObject *thiz);
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#endif
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extern void object_cond_signal(IObject *thiz);
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extern void object_cond_broadcast(IObject *thiz);
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#ifdef USE_DEBUG
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#define object_lock_exclusive(thiz) object_lock_exclusive_((thiz), __FILE__, __LINE__)
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#define object_unlock_exclusive(thiz) object_unlock_exclusive_((thiz), __FILE__, __LINE__)
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#define object_unlock_exclusive_attributes(thiz, attr) \
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object_unlock_exclusive_attributes_((thiz), (attr), __FILE__, __LINE__)
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#define object_cond_wait(thiz) object_cond_wait_((thiz), __FILE__, __LINE__)
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#endif
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// Currently shared locks are implemented as exclusive, but don't count on it
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#define object_lock_shared(thiz) object_lock_exclusive(thiz)
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#define object_unlock_shared(thiz) object_unlock_exclusive(thiz)
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// Currently interface locks are actually on whole object, but don't count on it.
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// These operations are undefined on IObject, as it lacks an mThis.
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// If you have an IObject, then use the object_ functions instead.
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#define interface_lock_exclusive(thiz) object_lock_exclusive(InterfaceToIObject(thiz))
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#define interface_unlock_exclusive(thiz) object_unlock_exclusive(InterfaceToIObject(thiz))
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#define interface_unlock_exclusive_attributes(thiz, attr) \
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object_unlock_exclusive_attributes(InterfaceToIObject(thiz), (attr))
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#define interface_lock_shared(thiz) object_lock_shared(InterfaceToIObject(thiz))
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#define interface_unlock_shared(thiz) object_unlock_shared(InterfaceToIObject(thiz))
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#define interface_cond_wait(thiz) object_cond_wait(InterfaceToIObject(thiz))
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#define interface_cond_signal(thiz) object_cond_signal(InterfaceToIObject(thiz))
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#define interface_cond_broadcast(thiz) object_cond_broadcast(InterfaceToIObject(thiz))
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// Peek and poke are an optimization for small atomic fields that don't "matter".
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// Don't use for struct, as struct copy might not be atomic.
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// On uniprocessor they can be no-ops, on SMP they could be memory barriers but locks are easier.
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#define object_lock_peek(thiz) object_lock_shared(thiz)
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#define object_unlock_peek(thiz) object_unlock_shared(thiz)
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#define interface_lock_poke(thiz) interface_lock_exclusive(thiz)
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#define interface_unlock_poke(thiz) interface_unlock_exclusive(thiz)
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#define interface_lock_peek(thiz) interface_lock_shared(thiz)
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#define interface_unlock_peek(thiz) interface_unlock_shared(thiz)
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