fuchsia/msd_img_semaphore.h

// Copyright 2019 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MSD_IMG_SEMAPHORE_H
#define MSD_IMG_SEMAPHORE_H

#include "magma_util/macros.h"
#include "msd.h"
#include "platform_semaphore.h"

class MsdImgSemaphore
{
public:
	static std::unique_ptr<MsdImgSemaphore> Import(uint32_t handle);
	static std::unique_ptr<MsdImgSemaphore> Create();

	MsdImgSemaphore(std::unique_ptr<magma::PlatformSemaphore> platform_semaphore);

	~MsdImgSemaphore();

	magma::PlatformSemaphore* platform_semaphore()
	{
		DASSERT(platform_semaphore_);
		return platform_semaphore_.get();
	}

private:
	std::unique_ptr<magma::PlatformSemaphore> platform_semaphore_;
};

class MsdImgAbiSemaphore : public msd_semaphore_t
{
public:
	MsdImgAbiSemaphore(std::shared_ptr<MsdImgSemaphore> ptr) : base_ptr_(std::move(ptr)) { magic_ = kMagic; }

	static MsdImgAbiSemaphore* cast(msd_semaphore_t* sema)
	{
		DASSERT(sema);
		DASSERT(sema->magic_ == kMagic);
		return static_cast<MsdImgAbiSemaphore*>(sema);
	}

	std::shared_ptr<MsdImgSemaphore> base_ptr() { return base_ptr_; }

private:
	std::shared_ptr<MsdImgSemaphore> base_ptr_;

	static const uint32_t kMagic = 'sema';
};

#endif // MSD_IMG_SEMAPHORE_H