blob: 010c0ff643dd33a7516bee5c52c55cb3d8894f39 [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef FLUTTER_FML_THREAD_LOCAL_H_
#define FLUTTER_FML_THREAD_LOCAL_H_
#include <memory>
#include "flutter/fml/build_config.h"
#include "flutter/fml/macros.h"
#define FML_THREAD_LOCAL_PTHREADS \
FML_OS_MACOSX || FML_OS_LINUX || FML_OS_ANDROID
#if FML_THREAD_LOCAL_PTHREADS
#include <pthread.h>
#endif
namespace fml {
#if FML_THREAD_LOCAL_PTHREADS
#define FML_THREAD_LOCAL static
namespace internal {
class ThreadLocalPointer {
public:
explicit ThreadLocalPointer(void (*destroy)(void*));
~ThreadLocalPointer();
void* get() const;
void* swap(void* ptr);
private:
pthread_key_t key_;
FML_DISALLOW_COPY_AND_ASSIGN(ThreadLocalPointer);
};
} // namespace internal
template <typename T>
class ThreadLocalUniquePtr {
public:
ThreadLocalUniquePtr() : ptr_(destroy) {}
T* get() const { return reinterpret_cast<T*>(ptr_.get()); }
void reset(T* ptr) { destroy(ptr_.swap(ptr)); }
private:
static void destroy(void* ptr) { delete reinterpret_cast<T*>(ptr); }
internal::ThreadLocalPointer ptr_;
FML_DISALLOW_COPY_AND_ASSIGN(ThreadLocalUniquePtr);
};
#else // FML_THREAD_LOCAL_PTHREADS
#define FML_THREAD_LOCAL static thread_local
template <typename T>
class ThreadLocalUniquePtr {
public:
ThreadLocalUniquePtr() = default;
T* get() const { return ptr_.get(); }
void reset(T* ptr) { ptr_.reset(ptr); }
private:
std::unique_ptr<T> ptr_;
FML_DISALLOW_COPY_AND_ASSIGN(ThreadLocalUniquePtr);
};
#endif // FML_THREAD_LOCAL_PTHREADS
#ifndef FML_THREAD_LOCAL
#error Thread local storage unavailable on the platform.
#endif // FML_THREAD_LOCAL
} // namespace fml
#endif // FLUTTER_FML_THREAD_LOCAL_H_