// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
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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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#ifndef sw_Resource_hpp
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#define sw_Resource_hpp
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#include "MutexLock.hpp"
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namespace sw
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{
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enum Accessor
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{
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PUBLIC, // Application/API access
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PRIVATE, // Renderer access, shared by multiple threads if read-only
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MANAGED, // Renderer access, shared read/write access if partitioned
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EXCLUSIVE
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};
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class Resource
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{
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public:
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Resource(size_t bytes);
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void destruct(); // Asynchronous destructor
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void *lock(Accessor claimer);
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void *lock(Accessor relinquisher, Accessor claimer);
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void unlock();
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void unlock(Accessor relinquisher);
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const void *data() const;
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const size_t size;
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private:
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~Resource(); // Always call destruct() instead
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MutexLock criticalSection;
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Event unblock;
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volatile int blocked;
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volatile Accessor accessor;
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volatile int count;
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bool orphaned;
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void *buffer;
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};
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}
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#endif // sw_Resource_hpp
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