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// Copyright 2015 The Chromium 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 "base/files/file_tracing.h"
#include "base/atomicops.h"
#include "base/files/file.h"
using base::subtle::AtomicWord;
namespace base {
namespace {
AtomicWord g_provider;
}
FileTracing::Provider* GetProvider() {
AtomicWord provider = base::subtle::Acquire_Load(&g_provider);
return reinterpret_cast<FileTracing::Provider*>(provider);
}
// static
bool FileTracing::IsCategoryEnabled() {
FileTracing::Provider* provider = GetProvider();
return provider && provider->FileTracingCategoryIsEnabled();
}
// static
void FileTracing::SetProvider(FileTracing::Provider* provider) {
base::subtle::Release_Store(&g_provider,
reinterpret_cast<AtomicWord>(provider));
}
FileTracing::ScopedEnabler::ScopedEnabler() {
FileTracing::Provider* provider = GetProvider();
if (provider)
provider->FileTracingEnable(this);
}
FileTracing::ScopedEnabler::~ScopedEnabler() {
FileTracing::Provider* provider = GetProvider();
if (provider)
provider->FileTracingDisable(this);
}
FileTracing::ScopedTrace::ScopedTrace() : id_(nullptr) {}
FileTracing::ScopedTrace::~ScopedTrace() {
if (id_) {
FileTracing::Provider* provider = GetProvider();
if (provider)
provider->FileTracingEventEnd(name_, id_);
}
}
void FileTracing::ScopedTrace::Initialize(const char* name,
const File* file,
int64_t size) {
id_ = &file->trace_enabler_;
name_ = name;
GetProvider()->FileTracingEventBegin(name_, id_, file->tracing_path_, size);
}
} // namespace base
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