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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <atomic>
#include <vespamalloc/malloc/common.h>
#include <vespamalloc/malloc/allocchunk.h>
#include <vespamalloc/malloc/globalpool.h>
namespace vespamalloc {
template <typename MemBlockPtrT, typename ThreadStatT >
class ThreadPoolT
{
public:
typedef AFList<MemBlockPtrT> ChunkSList;
typedef AllocPoolT<MemBlockPtrT> AllocPool;
ThreadPoolT();
~ThreadPoolT();
void setPool(AllocPool & pool) {
_allocPool = & pool;
}
void malloc(size_t sz, MemBlockPtrT & mem) __attribute__((noinline));
void free(MemBlockPtrT mem, SizeClassT sc) __attribute__((noinline));
void info(FILE * os, size_t level, const DataSegment<MemBlockPtrT> & ds) const __attribute__((noinline));
/**
* Indicates if it represents an active thread.
* @return true if this represents an active thread.
*/
bool isActive() const;
/**
* Indicates if it represents an active thread that actually has done any allocations/deallocations.
* @return true if this represents an active used thread.
*/
bool isUsed() const;
int osThreadId() const { return _osThreadId; }
void quit() { _osThreadId = 0; } // Implicit memory barrier
void init(int thrId);
static void setParams(size_t alwayReuseLimit, size_t threadCacheLimit);
bool grabAvailable();
private:
bool hasActuallyBeenUsed() const;
ThreadPoolT(const ThreadPoolT & rhs);
ThreadPoolT & operator =(const ThreadPoolT & rhs);
unsigned threadId() const { return _threadId; }
void setThreadId(unsigned th) { _threadId = th; }
class AllocFree {
public:
AllocFree() : _allocFrom(NULL), _freeTo(NULL) { }
void init(AllocPool & allocPool, SizeClassT sc) {
if (_allocFrom == NULL) {
_allocFrom = allocPool.getFree(sc, 1);
assert(_allocFrom != NULL);
_freeTo = allocPool.getFree(sc, 1);
assert(_freeTo != NULL);
}
}
void swap() {
std::swap(_allocFrom, _freeTo);
}
ChunkSList *_allocFrom;
ChunkSList *_freeTo;
};
void mallocHelper(size_t exactSize, SizeClassT sc, AllocFree & af, MemBlockPtrT & mem) __attribute__ ((noinline));
bool alwaysReuse(SizeClassT sc) { return sc > _alwaysReuseSCLimit; }
AllocPool * _allocPool;
AllocFree _memList[NUM_SIZE_CLASSES];
ThreadStatT _stat[NUM_SIZE_CLASSES];
unsigned _threadId;
std::atomic<ssize_t> _osThreadId;
static SizeClassT _alwaysReuseSCLimit __attribute__((visibility("hidden")));
static size_t _threadCacheLimit __attribute__((visibility("hidden")));
};
}
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