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/* Copyright (c) <2003-2011> <Julio Jerez, Newton Game Dynamics>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source distribution.
*/
#ifndef __dgMemory__
#define __dgMemory__
#include "dgStdafx.h"
#ifdef _DEBUG
//#define __TRACK_MEMORY_LEAKS__
#endif
class dgMemoryAllocator;
void dgInitMemoryGlobals();
void dgDestroyMemoryGlobals();
void *dgApi dgMalloc(size_t size, dgMemoryAllocator *const allocator);
void dgApi dgFree(void *const ptr);
void *dgApi dgMallocStack(size_t size);
void *dgApi dgMallocAligned(size_t size, dgInt32 alignmentInBytes);
void dgApi dgFreeStack(void *const ptr);
typedef void *(dgApi *dgMemAlloc)(dgUnsigned32 size);
typedef void (dgApi *dgMemFree)(void *const ptr, dgUnsigned32 size);
typedef void (dgApi *dgSerialize)(void *const userData, const void *const buffer, size_t size);
typedef void (dgApi *dgDeserialize)(void *const userData, void *buffer, size_t size);
//void dgSetMemoryDrivers (dgMemAlloc alloc, dgMemFree free);
void dgSetGlobalAllocators(dgMemAlloc alloc, dgMemFree free);
dgInt32 dgGetMemoryUsed();
#define DG_CLASS_ALLOCATOR_NEW(allocator) inline void *operator new (size_t size, dgMemoryAllocator* const allocator) { return dgMalloc(size, allocator);}
#define DG_CLASS_ALLOCATOR_NEW_ARRAY(allocator) inline void *operator new[] (size_t size, dgMemoryAllocator* const allocator) { return dgMalloc(size, allocator);}
#define DG_CLASS_ALLOCATOR_DELETE(allocator) inline void operator delete (void* const ptr, dgMemoryAllocator* const allocator) { dgFree(ptr); }
#define DG_CLASS_ALLOCATOR_DELETE_ARRAY(allocator) inline void operator delete[] (void* const ptr, dgMemoryAllocator* const allocator) { dgFree(ptr); }
#define DG_CLASS_ALLOCATOR_NEW_DUMMY inline void *operator new (size_t size) { NEWTON_ASSERT (0); return dgMalloc(size, NULL);}
#define DG_CLASS_ALLOCATOR_NEW_ARRAY_DUMMY inline void *operator new[] (size_t size) { NEWTON_ASSERT (0); return dgMalloc(size, NULL);}
#define DG_CLASS_ALLOCATOR_DELETE_DUMMY inline void operator delete (void* const ptr) { dgFree(ptr); }
#define DG_CLASS_ALLOCATOR_DELETE_ARRAY_DUMMY inline void operator delete[] (void* const ptr) { dgFree(ptr); }
#define DG_CLASS_ALLOCATOR(allocator) \
DG_CLASS_ALLOCATOR_DELETE(allocator) \
DG_CLASS_ALLOCATOR_DELETE_ARRAY(allocator) \
DG_CLASS_ALLOCATOR_NEW(allocator) \
DG_CLASS_ALLOCATOR_NEW_ARRAY(allocator) \
DG_CLASS_ALLOCATOR_NEW_DUMMY \
DG_CLASS_ALLOCATOR_NEW_ARRAY_DUMMY \
DG_CLASS_ALLOCATOR_DELETE_DUMMY \
DG_CLASS_ALLOCATOR_DELETE_ARRAY_DUMMY
class dgMemoryAllocator {
static constexpr dgInt32 memoryGranularity = sizeof(void*) * 8;
static constexpr dgInt32 memorySize = 1024 - 64;
static constexpr dgInt32 memoryBinSize = 1024 * 16;
static constexpr dgInt32 memoryBinEntries = memorySize / memoryGranularity;
public:
class dgMemoryBin {
public:
class dgMemoryBinInfo {
public:
dgInt32 m_count;
dgInt32 m_totalCount;
dgInt32 m_stepInBites;
dgMemoryBin *m_next;
dgMemoryBin *m_prev;
};
char m_pool[memoryBinSize - sizeof(dgMemoryBinInfo) - memoryGranularity * 2];
dgMemoryBinInfo m_info;
};
class dgMemoryCacheEntry {
public:
dgMemoryCacheEntry *m_next;
dgMemoryCacheEntry *m_prev;
};
class dgMemoryInfo {
public:
void *m_ptr;
dgMemoryAllocator *m_allocator;
dgInt32 m_size;
dgInt32 m_enum;
#ifdef _DEBUG
dgInt32 m_workingSize;
#endif
DG_INLINE void SaveInfo(dgMemoryAllocator *const allocator, void *const ptr, dgInt32 size, dgInt32 &enumerator, dgInt32 workingSize = 0) {
m_ptr = ptr;
m_size = size;
m_enum = enumerator;
enumerator ++;
m_allocator = allocator;
#ifdef _DEBUG
m_workingSize = workingSize;
#endif
}
};
class dgMemDirectory {
public:
dgMemoryBin *m_first;
dgMemoryCacheEntry *m_cache;
};
// this is a simple memory leak tracker, it uses an flat array of two megabyte indexed by a hatch code
#ifdef __TRACK_MEMORY_LEAKS__
class dgMemoryLeaksTracker {
#define DG_TRACK_MEMORY_LEAKS_ENTRIES (1024 * 1024 * 4)
class Pool {
public:
void *m_ptr;
dgInt32 m_size;
dgInt32 m_allocationNumber;
};
public:
dgMemoryLeaksTracker();
~dgMemoryLeaksTracker();
void RemoveBlock(void *const ptr);
void InsertBlock(dgInt32 size, void *const ptr);
dgInt32 m_density;
dgInt32 m_totalAllocatedBytes;
dgInt32 m_totalAllocatedCalls;
dgInt32 m_leakAllocationCounter;
Pool m_pool[DG_TRACK_MEMORY_LEAKS_ENTRIES];
};
#endif
dgMemoryAllocator();
~dgMemoryAllocator();
void *operator new (size_t size);
void operator delete (void *const ptr);
dgInt32 GetMemoryUsed() const;
void SetAllocatorsCallback(dgMemAlloc memAlloc, dgMemFree memFree);
void *MallocLow(dgInt32 size, dgInt32 alignment = memoryGranularity);
void FreeLow(void *const retPtr);
void *Malloc(dgInt32 memsize);
void Free(void *const retPtr);
protected:
dgMemoryAllocator(dgMemAlloc memAlloc, dgMemFree memFree);
dgInt32 m_emumerator;
dgInt32 m_memoryUsed;
dgMemFree m_free;
dgMemAlloc m_malloc;
dgMemDirectory m_memoryDirectory[memoryBinEntries + 1];
#ifdef __TRACK_MEMORY_LEAKS__
dgMemoryLeaksTracker m_leaklTracker;
#endif
};
#endif
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