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// Copyright 2018 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/platform/wtf/threading.h"
#include <atomic>
#include "build/build_config.h"
#include "third_party/blink/renderer/platform/wtf/stack_util.h"
#include "third_party/blink/renderer/platform/wtf/text/text_codec_icu.h"
namespace WTF {
#if !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_WIN)
base::PlatformThreadId CurrentThread() {
thread_local base::PlatformThreadId g_id = base::PlatformThread::CurrentId();
return g_id;
}
#endif // !BUILDFLAG(IS_ANDROID) && !BUILDFLAG(IS_WIN)
// For debugging only -- whether a non-main thread has been created.
#if DCHECK_IS_ON()
static std::atomic_bool g_thread_created(false);
bool IsBeforeThreadCreated() {
return !g_thread_created;
}
void WillCreateThread() {
g_thread_created = true;
}
void SetIsBeforeThreadCreatedForTest() {
g_thread_created = false;
}
#endif
ThreadSpecific<Threading>* Threading::static_data_;
Threading::Threading()
: cached_converter_icu_(new ICUConverterWrapper),
thread_id_(CurrentThread()) {}
Threading::~Threading() = default;
void Threading::Initialize() {
DCHECK(!Threading::static_data_);
Threading::static_data_ = new ThreadSpecific<Threading>;
WtfThreading();
}
#if BUILDFLAG(IS_WIN) && defined(COMPILER_MSVC)
size_t Threading::ThreadStackSize() {
// Needed to bootstrap Threading on Windows, because this value is needed
// before the main thread data is fully initialized.
if (!Threading::static_data_->IsSet())
return internal::ThreadStackSize();
Threading& data = WtfThreading();
if (!data.thread_stack_size_)
data.thread_stack_size_ = internal::ThreadStackSize();
return data.thread_stack_size_;
}
#endif
} // namespace WTF
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