66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
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// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/files/file_tracing.h"
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#include "base/atomicops.h"
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#include "base/files/file.h"
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using base::subtle::AtomicWord;
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namespace base {
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namespace {
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AtomicWord g_provider;
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}
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FileTracing::Provider* GetProvider() {
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AtomicWord provider = base::subtle::Acquire_Load(&g_provider);
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return reinterpret_cast<FileTracing::Provider*>(provider);
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}
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// static
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bool FileTracing::IsCategoryEnabled() {
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FileTracing::Provider* provider = GetProvider();
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return provider && provider->FileTracingCategoryIsEnabled();
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}
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// static
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void FileTracing::SetProvider(FileTracing::Provider* provider) {
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base::subtle::Release_Store(&g_provider,
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reinterpret_cast<AtomicWord>(provider));
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}
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FileTracing::ScopedEnabler::ScopedEnabler() {
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FileTracing::Provider* provider = GetProvider();
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if (provider)
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provider->FileTracingEnable(this);
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}
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FileTracing::ScopedEnabler::~ScopedEnabler() {
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FileTracing::Provider* provider = GetProvider();
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if (provider)
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provider->FileTracingDisable(this);
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}
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FileTracing::ScopedTrace::ScopedTrace() : id_(nullptr) {}
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FileTracing::ScopedTrace::~ScopedTrace() {
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if (id_) {
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FileTracing::Provider* provider = GetProvider();
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if (provider)
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provider->FileTracingEventEnd(name_, id_);
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}
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}
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void FileTracing::ScopedTrace::Initialize(const char* name,
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const File* file,
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int64_t size) {
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id_ = &file->trace_enabler_;
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name_ = name;
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GetProvider()->FileTracingEventBegin(name_, id_, file->tracing_path_, size);
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}
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} // namespace base
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