/*
- * Copyright 2013 Facebook, Inc.
+ * Copyright 2015 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_THREADCACHEDARENA_H_
#define FOLLY_THREADCACHEDARENA_H_
-#include <utility>
-#include <mutex>
-#include <limits>
-#include <boost/intrusive/slist.hpp>
+#include <type_traits>
-#include "folly/Likely.h"
-#include "folly/Arena.h"
-#include "folly/ThreadLocal.h"
+#include <folly/Arena.h>
+#include <folly/Likely.h>
+#include <folly/Synchronized.h>
+#include <folly/ThreadLocal.h>
namespace folly {
class ThreadCachedArena {
public:
explicit ThreadCachedArena(
- size_t minBlockSize = SysArena::kDefaultMinBlockSize);
+ size_t minBlockSize = SysArena::kDefaultMinBlockSize,
+ size_t maxAlign = SysArena::kDefaultMaxAlign);
void* allocate(size_t size) {
SysArena* arena = arena_.get();
// Deallocate? Never!
}
+ // Gets the total memory used by the arena
+ size_t totalSize() const;
+
private:
+ struct ThreadLocalPtrTag {};
+
ThreadCachedArena(const ThreadCachedArena&) = delete;
ThreadCachedArena(ThreadCachedArena&&) = delete;
ThreadCachedArena& operator=(const ThreadCachedArena&) = delete;
// the ThreadCachedArena is destroyed.
void zombify(SysArena&& arena);
- size_t minBlockSize_;
- SysArena zombies_; // allocated from threads that are now dead
- std::mutex zombiesMutex_;
- ThreadLocalPtr<SysArena> arena_; // per-thread arena
+ const size_t minBlockSize_;
+ const size_t maxAlign_;
+
+ ThreadLocalPtr<SysArena, ThreadLocalPtrTag> arena_; // Per-thread arena.
+
+ // Allocations from threads that are now dead.
+ Synchronized<SysArena> zombies_;
};
+template <>
+struct IsArenaAllocator<ThreadCachedArena> : std::true_type { };
+
} // namespace folly
#endif /* FOLLY_THREADCACHEDARENA_H_ */
-