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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 "freelist.h"
#include <vespamalloc/util/traceutil.h>
#include <vespamalloc/util/stream.h>
namespace vespamalloc::segment {
template<typename MemBlockPtrT>
class DataSegment
{
public:
DataSegment(const DataSegment & rhs) = delete;
DataSegment & operator = (const DataSegment & rhs) = delete;
DataSegment() __attribute__((noinline));
~DataSegment() __attribute__((noinline));
void * getBlock(size_t & oldBlockSize, SizeClassT sc) __attribute__((noinline));
void returnBlock(void *ptr) __attribute__((noinline));
SizeClassT sizeClass(const void * ptr) const { return _blockList[blockId(ptr)].sizeClass(); }
bool containsPtr(const void * ptr) const { return blockId(ptr) < BlockCount; }
size_t getMaxSize(const void * ptr) const { return _blockList[blockId(ptr)].getMaxSize<MemBlockPtrT>(); }
const void * start() const { return _osMemory.getStart(); }
const void * end() const { return _osMemory.getEnd(); }
static SizeClassT adjustedSizeClass(size_t sz) { return (sz >> 16) + 0x400; }
static size_t adjustedClassSize(SizeClassT sc) { return (sc > 0x400) ? (sc - 0x400) << 16 : sc; }
size_t dataSize() const { return (const char*)end() - (const char*)start(); }
size_t freeSize() const;
size_t infoThread(FILE * os, int level, uint32_t thread, SizeClassT sct, uint32_t maxThreadId=0) const __attribute__((noinline));
void info(FILE * os, size_t level) __attribute__((noinline));
void setupLog(size_t bigMemLogLevel, size_t bigLimit, size_t bigIncrement, size_t allocs2Show)
{
_bigSegmentLogLevel = bigMemLogLevel;
if ((size_t(end()) < _nextLogLimit) || (size_t(end()) < (size_t(start()) + bigLimit))) {
_nextLogLimit = size_t(start()) + bigLimit;
}
_bigIncrement = bigIncrement;
_allocs2Show = allocs2Show;
checkAndLogBigSegment();
}
void enableThreadSupport() { _mutex.init(); }
private:
void checkAndLogBigSegment() __attribute__((noinline));
typedef BlockT BlockList[BlockCount];
typedef FreeListT<BlockCount/2> FreeList;
OSMemory _osMemory;
size_t _bigSegmentLogLevel;
size_t _bigIncrement;
size_t _allocs2Show;
size_t _unmapSize;
size_t _nextLogLimit;
size_t _partialExtension;
Mutex _mutex;
BlockList _blockList;
FreeList _freeList;
FreeList _unMappedList;
};
}
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