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// Copyright 2015 The Chromium Authors
// 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 <atomic>
#include "base/files/file.h"
#include "base/trace_event/trace_event.h"
namespace base {
namespace {
std::atomic<FileTracing::Provider*> g_provider;
}
FileTracing::Provider* GetProvider() {
return g_provider.load(std::memory_order_acquire);
}
// static
bool FileTracing::IsCategoryEnabled() {
FileTracing::Provider* provider = GetProvider();
return provider && provider->FileTracingCategoryIsEnabled();
}
// static
void FileTracing::SetProvider(FileTracing::Provider* provider) {
g_provider.store(provider, std::memory_order_release);
}
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() {
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->path_, size);
}
} // namespace base
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