/*
- * Copyright 2013 Facebook, Inc.
+ * Copyright 2014 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
#ifndef FOLLY_THREADLOCAL_H_
#define FOLLY_THREADLOCAL_H_
-#include "folly/Portability.h"
+#include <folly/Portability.h>
#include <boost/iterator/iterator_facade.hpp>
-#include "folly/Likely.h"
+#include <folly/Likely.h>
#include <type_traits>
};
} // namespace
-#include "folly/detail/ThreadLocalDetail.h"
+#include <folly/detail/ThreadLocalDetail.h>
namespace folly {
* We use a single global pthread_key_t per Tag to manage object destruction and
* memory cleanup upon thread exit because there is a finite number of
* pthread_key_t's available per machine.
+ *
+ * NOTE: Apple platforms don't support the same semantics for __thread that
+ * Linux does (and it's only supported at all on i386). For these, use
+ * pthread_setspecific()/pthread_getspecific() for the per-thread
+ * storage. Windows (MSVC and GCC) does support the same semantics
+ * with __declspec(thread)
*/
template<class T, class Tag=void>
public:
ThreadLocalPtr() : id_(threadlocal_detail::StaticMeta<Tag>::create()) { }
- ThreadLocalPtr(ThreadLocalPtr&& other) : id_(other.id_) {
+ ThreadLocalPtr(ThreadLocalPtr&& other) noexcept : id_(other.id_) {
other.id_ = 0;
}
return *get();
}
+ T* release() {
+ threadlocal_detail::ElementWrapper& w =
+ threadlocal_detail::StaticMeta<Tag>::get(id_);
+
+ return static_cast<T*>(w.release());
+ }
+
void reset(T* newPtr = nullptr) {
threadlocal_detail::ElementWrapper& w =
threadlocal_detail::StaticMeta<Tag>::get(id_);
friend class ThreadLocalPtr<T,Tag>;
threadlocal_detail::StaticMeta<Tag>& meta_;
- boost::mutex* lock_;
- int id_;
+ std::mutex* lock_;
+ uint32_t id_;
public:
class Iterator;
}
private:
- explicit Accessor(int id)
+ explicit Accessor(uint32_t id)
: meta_(threadlocal_detail::StaticMeta<Tag>::instance()),
lock_(&meta_.lock_) {
lock_->lock();
ThreadLocalPtr(const ThreadLocalPtr&) = delete;
ThreadLocalPtr& operator=(const ThreadLocalPtr&) = delete;
- int id_; // every instantiation has a unique id
+ uint32_t id_; // every instantiation has a unique id
};
} // namespace folly