lib/magma/src/sys_driver/magma_system_buffer.cc

// Copyright 2016 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.

#include "magma_system_buffer.h"
#include "magma_util/macros.h"

MagmaSystemBuffer::MagmaSystemBuffer(std::unique_ptr<magma::PlatformBuffer> platform_buf,
                                     msd_buffer_unique_ptr_t msd_buf)
    : platform_buf_(std::move(platform_buf)), msd_buf_(std::move(msd_buf))
{
}

std::unique_ptr<MagmaSystemBuffer>
MagmaSystemBuffer::Create(std::unique_ptr<magma::PlatformBuffer> platform_buffer)
{
    if (!platform_buffer)
        return DRETP(nullptr, "Failed to create PlatformBuffer");

    uint32_t duplicate_handle;
    if (!platform_buffer->duplicate_handle(&duplicate_handle))
        return DRETP(nullptr, "failed to get duplicate_handle");

    msd_buffer_unique_ptr_t msd_buf = MsdBufferUniquePtr(msd_buffer_import(duplicate_handle));
    if (!msd_buf)
        return DRETP(nullptr,
                     "Failed to import newly allocated buffer into the MSD Implementation");

    return std::unique_ptr<MagmaSystemBuffer>(
        new MagmaSystemBuffer(std::move(platform_buffer), std::move(msd_buf)));
}