Source/WebCore/Modules/webgpu/WebGPUPipeline.cpp

/*
 * Copyright (C) 2019 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 */

#include "config.h"
#include "WebGPUPipeline.h"

#if ENABLE(WEBGPU)

#include "GPUErrorScopes.h"
#include "InspectorInstrumentation.h"
#include "ScriptExecutionContext.h"
#include "WebGPUDevice.h"
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/Ref.h>

namespace WebCore {

HashMap<WebGPUPipeline*, WebGPUDevice*>& WebGPUPipeline::instances(const LockHolder&)
{
    static NeverDestroyed<HashMap<WebGPUPipeline*, WebGPUDevice*>> instances;
    return instances;
}

Lock& WebGPUPipeline::instancesMutex()
{
    static LazyNeverDestroyed<Lock> mutex;
    static std::once_flag initializeMutex;
    std::call_once(initializeMutex, [] {
        mutex.construct();
    });
    return mutex.get();
}

WebGPUPipeline::WebGPUPipeline(WebGPUDevice& device, GPUErrorScopes& errorScopes)
    : GPUObjectBase(makeRef(errorScopes))
    , m_scriptExecutionContext(device.scriptExecutionContext())
{
    ASSERT(m_scriptExecutionContext);

    {
        LockHolder lock(instancesMutex());
        instances(lock).add(this, &device);
    }
}

WebGPUPipeline::~WebGPUPipeline()
{
    InspectorInstrumentation::willDestroyWebGPUPipeline(*this);

    {
        LockHolder lock(instancesMutex());
        ASSERT(instances(lock).contains(this));
        instances(lock).remove(this);
    }
}

} // namespace WebCore

#endif // ENABLE(WEBGPU)