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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "common.h"
#include "allocchunk.h"
#include "globalpool.h"
#include "mmappool.h"
#include <atomic>
namespace vespamalloc {
constexpr int MMAP_LIMIT_MIN = 0x100000; // 1M
constexpr int MMAP_LIMIT_DEFAULT = 0x4000000; // 64M
constexpr int MMAP_LIMIT_MAX = 0x40000000; // 1G
template <typename MemBlockPtrT, typename ThreadStatT >
class ThreadPoolT
{
public:
using ChunkSList = AFList<MemBlockPtrT>;
using AllocPool = AllocPoolT<MemBlockPtrT>;
using DataSegment = segment::DataSegment;
ThreadPoolT();
~ThreadPoolT();
void setPool(AllocPool & allocPool, MMapPool & mmapPool) {
_allocPool = & allocPool;
_mmapPool = & mmapPool;
}
int mallopt(int param, int value);
void malloc(size_t sz, MemBlockPtrT & mem);
void free(MemBlockPtrT mem, SizeClassT sc);
void info(FILE * os, size_t level, const DataSegment & 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; }
uint32_t threadId() const { return _threadId; }
void quit() { _osThreadId = 0; } // Implicit memory barrier
void init(int thrId);
static void setParams(size_t threadCacheLimit);
bool grabAvailable();
private:
bool hasActuallyBeenUsed() const;
ThreadPoolT(const ThreadPoolT & rhs);
ThreadPoolT & operator =(const ThreadPoolT & rhs);
void setThreadId(uint32_t th) { _threadId = th; }
class AllocFree {
public:
AllocFree() : _allocFrom(nullptr), _freeTo(nullptr) { }
void init(AllocPool & allocPool, SizeClassT sc) {
if (_allocFrom == nullptr) {
_allocFrom = allocPool.getFree(sc, 1);
ASSERT_STACKTRACE(_allocFrom != nullptr);
_freeTo = allocPool.getFree(sc, 1);
ASSERT_STACKTRACE(_freeTo != nullptr);
}
}
void swap() {
std::swap(_allocFrom, _freeTo);
}
ChunkSList *_allocFrom;
ChunkSList *_freeTo;
};
void mallocHelper(size_t exactSize, SizeClassT sc, AllocFree & af, MemBlockPtrT & mem) __attribute__ ((noinline));
static constexpr bool alwaysReuse(SizeClassT sc) { return sc > ALWAYS_REUSE_SC_LIMIT; }
AllocPool * _allocPool;
MMapPool * _mmapPool;
size_t _mmapLimit;
AllocFree _memList[NUM_SIZE_CLASSES];
ThreadStatT _stat[NUM_SIZE_CLASSES];
uint32_t _threadId;
std::atomic<ssize_t> _osThreadId;
static constexpr SizeClassT ALWAYS_REUSE_SC_LIMIT = std::max(MemBlockPtrT::sizeClass(ALWAYS_REUSE_LIMIT),
SizeClassT(MemBlockPtrT::SizeClassSpan));
static size_t _threadCacheLimit __attribute__((visibility("hidden")));
};
}
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