mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 06:16:30 +03:00
97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
// Copyright 2016 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/sequence_token.h"
|
|
|
|
#include "base/atomic_sequence_num.h"
|
|
#include "base/check_op.h"
|
|
#include "base/no_destructor.h"
|
|
#include "base/threading/thread_local.h"
|
|
|
|
namespace base {
|
|
|
|
namespace {
|
|
|
|
base::AtomicSequenceNumber g_sequence_token_generator;
|
|
|
|
base::AtomicSequenceNumber g_task_token_generator;
|
|
|
|
ThreadLocalPointer<const SequenceToken>& GetTlsCurrentSequenceToken() {
|
|
static base::NoDestructor<ThreadLocalPointer<const SequenceToken>> instance;
|
|
return *instance;
|
|
}
|
|
|
|
ThreadLocalPointer<const TaskToken>& GetTlsCurrentTaskToken() {
|
|
static base::NoDestructor<ThreadLocalPointer<const TaskToken>> instance;
|
|
return *instance;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
bool SequenceToken::operator==(const SequenceToken& other) const {
|
|
return token_ == other.token_ && IsValid();
|
|
}
|
|
|
|
bool SequenceToken::operator!=(const SequenceToken& other) const {
|
|
return !(*this == other);
|
|
}
|
|
|
|
bool SequenceToken::IsValid() const {
|
|
return token_ != kInvalidSequenceToken;
|
|
}
|
|
|
|
int SequenceToken::ToInternalValue() const {
|
|
return token_;
|
|
}
|
|
|
|
SequenceToken SequenceToken::Create() {
|
|
return SequenceToken(g_sequence_token_generator.GetNext());
|
|
}
|
|
|
|
SequenceToken SequenceToken::GetForCurrentThread() {
|
|
const SequenceToken* current_sequence_token =
|
|
GetTlsCurrentSequenceToken().Get();
|
|
return current_sequence_token ? *current_sequence_token : SequenceToken();
|
|
}
|
|
|
|
bool TaskToken::operator==(const TaskToken& other) const {
|
|
return token_ == other.token_ && IsValid();
|
|
}
|
|
|
|
bool TaskToken::operator!=(const TaskToken& other) const {
|
|
return !(*this == other);
|
|
}
|
|
|
|
bool TaskToken::IsValid() const {
|
|
return token_ != kInvalidTaskToken;
|
|
}
|
|
|
|
TaskToken TaskToken::Create() {
|
|
return TaskToken(g_task_token_generator.GetNext());
|
|
}
|
|
|
|
TaskToken TaskToken::GetForCurrentThread() {
|
|
const TaskToken* current_task_token = GetTlsCurrentTaskToken().Get();
|
|
return current_task_token ? *current_task_token : TaskToken();
|
|
}
|
|
|
|
ScopedSetSequenceTokenForCurrentThread::ScopedSetSequenceTokenForCurrentThread(
|
|
const SequenceToken& sequence_token)
|
|
: sequence_token_(sequence_token), task_token_(TaskToken::Create()) {
|
|
DCHECK(!GetTlsCurrentSequenceToken().Get());
|
|
DCHECK(!GetTlsCurrentTaskToken().Get());
|
|
GetTlsCurrentSequenceToken().Set(&sequence_token_);
|
|
GetTlsCurrentTaskToken().Set(&task_token_);
|
|
}
|
|
|
|
ScopedSetSequenceTokenForCurrentThread::
|
|
~ScopedSetSequenceTokenForCurrentThread() {
|
|
DCHECK_EQ(GetTlsCurrentSequenceToken().Get(), &sequence_token_);
|
|
DCHECK_EQ(GetTlsCurrentTaskToken().Get(), &task_token_);
|
|
GetTlsCurrentSequenceToken().Set(nullptr);
|
|
GetTlsCurrentTaskToken().Set(nullptr);
|
|
}
|
|
|
|
} // namespace base
|