/*

 * Copyright 2017 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef GrSemaphore_DEFINED

#define GrSemaphore_DEFINED

#include "include/gpu/GrBackendSemaphore.h"

/**

 * Represents a semaphore-like GPU synchronization object.

 */

class GrSemaphore {

public:

    virtual ~GrSemaphore() {}

    // The derived class can return its GrBackendSemaphore. This is used when flushing with signal

    // semaphores so we can set the client's GrBackendSemaphore object after we've created the

    // internal semaphore.

    virtual GrBackendSemaphore backendSemaphore() const = 0;

private:

    friend class GrGpu; // for setIsOwned

    // This is only used in GrGpu to handle the case where we created a semaphore that was meant to

    // be borrowed, but we failed to submit it. So we must go back and switch the semaphore to owned

    // so that it gets deleted.

    virtual void setIsOwned() = 0;

};

#endif