/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrSemaphore_DEFINED
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#define GrSemaphore_DEFINED
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#include "GrBackendSemaphore.h"
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#include "GrGpuResource.h"
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/**
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* Represents a semaphore-like GPU synchronization object. This is a slightly odd fit for
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* GrGpuResource because we don't care about budgeting, recycling, or read/write references for
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* these. However, making it a GrGpuResource makes it simpler to handle releasing/abandoning these
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* along with other resources. If more cases like this arise we could consider moving some of the
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* unused functionality off of GrGpuResource.
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*/
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class GrSemaphore : public GrGpuResource {
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public:
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// The derived class can return its GrBackendSemaphore. This is used when flushing with signal
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// semaphores so we can set the client's GrBackendSemaphore object after we've created the
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// internal semaphore.
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virtual GrBackendSemaphore backendSemaphore() const = 0;
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const char* getResourceType() const override { return "semaphore"; }
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protected:
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explicit GrSemaphore(GrGpu* gpu) : INHERITED(gpu) {}
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private:
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size_t onGpuMemorySize() const override { return 0; }
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typedef GrGpuResource INHERITED;
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};
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#endif
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