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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/webaudio/offline_audio_worklet_thread.h"
#include "third_party/blink/renderer/core/workers/global_scope_creation_params.h"
#include "third_party/blink/renderer/modules/webaudio/audio_worklet_global_scope.h"
#include "third_party/blink/renderer/platform/instrumentation/tracing/trace_event.h"
namespace blink {
namespace {
// Use for ref-counting of all OfflineAudioWorkletThread instances in a
// process. Incremented by the constructor and decremented by destructor.
int ref_count = 0;
void EnsureSharedBackingThread(const ThreadCreationParams& params) {
DCHECK(IsMainThread());
DCHECK_EQ(ref_count, 1);
WorkletThreadHolder<OfflineAudioWorkletThread>::EnsureInstance(params);
}
} // namespace
template class WorkletThreadHolder<OfflineAudioWorkletThread>;
OfflineAudioWorkletThread::OfflineAudioWorkletThread(
WorkerReportingProxy& worker_reporting_proxy)
: WorkerThread(worker_reporting_proxy) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("audio-worklet"),
"OfflineAudioWorkletThread()");
DCHECK(IsMainThread());
ThreadCreationParams params =
ThreadCreationParams(ThreadType::kOfflineAudioWorkletThread);
// OfflineAudioWorkletThread always uses a kNormal type thread.
params.base_thread_type = base::ThreadType::kDefault;
if (++ref_count == 1) {
EnsureSharedBackingThread(params);
}
}
OfflineAudioWorkletThread::~OfflineAudioWorkletThread() {
DCHECK(IsMainThread());
DCHECK_GT(ref_count, 0);
if (--ref_count == 0) {
ClearSharedBackingThread();
}
}
WorkerBackingThread& OfflineAudioWorkletThread::GetWorkerBackingThread() {
return *WorkletThreadHolder<OfflineAudioWorkletThread>::GetInstance()
->GetThread();
}
void OfflineAudioWorkletThread::ClearSharedBackingThread() {
DCHECK(IsMainThread());
CHECK_EQ(ref_count, 0);
WorkletThreadHolder<OfflineAudioWorkletThread>::ClearInstance();
}
WorkerOrWorkletGlobalScope* OfflineAudioWorkletThread::CreateWorkerGlobalScope(
std::unique_ptr<GlobalScopeCreationParams> creation_params) {
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("audio-worklet"),
"OfflineAudioWorkletThread::CreateWorkerGlobalScope");
return MakeGarbageCollected<AudioWorkletGlobalScope>(
std::move(creation_params), this);
}
} // namespace blink
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