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#include "UnityPrefix.h"
#include "UnityDefaultAllocator.h"
#if ENABLE_MEMORY_MANAGER
#include "Runtime/Allocator/AllocationHeader.h"
#include "Runtime/Profiler/MemoryProfiler.h"
#include "Runtime/Utilities/BitUtility.h"
#include "Runtime/Allocator/MemoryManager.h"
template<class LLAlloctor>
UnityDefaultAllocator<LLAlloctor>::UnityDefaultAllocator(const char* name)
: BaseAllocator(name)
{
memset(m_PageAllocationList,0,sizeof(m_PageAllocationList));
}
template<class LLAlloctor>
void* UnityDefaultAllocator<LLAlloctor>::Allocate (size_t size, int align)
{
size_t realSize = AllocationHeader::CalculateNeededAllocationSize(size, align);
void* rawPtr = LLAlloctor::Malloc( realSize );
if(rawPtr == NULL)
return NULL;
void* realPtr = AddHeaderAndFooter(rawPtr, size, align);
RegisterAllocation(realPtr);
return realPtr;
}
template<class LLAlloctor>
void* UnityDefaultAllocator<LLAlloctor>::Reallocate( void* p, size_t size, int align)
{
if (p == NULL)
return Allocate(size, align);
AllocationHeader::ValidateIntegrity(p, m_AllocatorIdentifier, align);
RegisterDeallocation(p);
size_t oldSize = GetPtrSize(p);
size_t oldPadCount = AllocationHeader::GetHeader(p)->GetPadding();
void* realPtr = AllocationHeader::GetRealPointer(p);
size_t realSize = AllocationHeader::CalculateNeededAllocationSize(size, align);
char* rawPtr = (char*)LLAlloctor::Realloc(realPtr, realSize);
if(rawPtr == NULL)
return NULL;
int newPadCount = AllocationHeader::GetRequiredPadding(rawPtr, align);
if (newPadCount != oldPadCount){
// new ptr needs different align padding. move memory and repad
char* srcptr = rawPtr + AllocationHeader::GetHeaderSize() + oldPadCount;
char* dstptr = rawPtr + AllocationHeader::GetHeaderSize() + newPadCount;
memmove(dstptr, srcptr, ( oldSize < size ? oldSize : size ) );
}
void* newptr = AddHeaderAndFooter(rawPtr, size, align);
RegisterAllocation(newptr);
return newptr;
}
template<class LLAlloctor>
void UnityDefaultAllocator<LLAlloctor>::Deallocate (void* p)
{
if (p == NULL)
return;
AllocationHeader::ValidateIntegrity(p, m_AllocatorIdentifier);
RegisterDeallocation(p);
void* realpointer = AllocationHeader::GetRealPointer(p);
LLAlloctor::Free(realpointer);
}
template<class LLAlloctor>
template<RequestType requestType>
bool UnityDefaultAllocator<LLAlloctor>::AllocationPage(const void* p){
// A memory and performance optimization could be to register lone pointers in the array instead of setting the bit.
// when multiple pointers arrive, pull the pointer out, register it, and register the next. Requires some bookkeeping.
// bottom 2 bits of the pointer can be used for flags.
int pageAllocationListIndex = 0;
UInt32 val = (UInt32)p;
if(sizeof(void*) > sizeof(UInt32))
{
Assert(sizeof(void*) == sizeof(UInt64));
UInt32 highbits = (UInt32)((UInt64)(uintptr_t)(p) >> 32);
if(highbits != 0)
{
pageAllocationListIndex = -1;
for(int i = 0; i < kNumPageAllocationBlocks; i++)
if(m_PageAllocationList[i].m_HighBits == highbits)
pageAllocationListIndex = i;
if(pageAllocationListIndex == -1)
{
// highbits not found in the list. find a free list element
for(int i = 0; i < kNumPageAllocationBlocks; i++)
{
if(m_PageAllocationList[i].m_PageAllocations == NULL)
{
m_PageAllocationList[i].m_HighBits = highbits;
pageAllocationListIndex = i;
break;
}
}
if(requestType == kTest)
{
return false;
}
else
{
if(pageAllocationListIndex == -1)
ErrorString("Using memoryadresses from more that 16GB of memory");
}
}
}
}
int ****& pageAllocations = m_PageAllocationList[pageAllocationListIndex].m_PageAllocations;
int page1 = (val >> (32-kPage1Bits)) & ((1<<kPage1Bits)-1);
int page2 = (val >> (32-kPage1Bits-kPage2Bits)) & ((1<<kPage2Bits)-1);
int page3 = (val >> (32-kPage1Bits-kPage2Bits-kPage3Bits)) & ((1<<kPage3Bits)-1);
int page4 = (val >> (32-kPage1Bits-kPage2Bits-kPage3Bits-kPage4Bits)) & ((1<<kPage4Bits)-1);
int bitindex = (val >> kTargetBitsRepresentedPerBit) & 0x1F;
if(requestType == kUnregister){
Assert(pageAllocations != NULL);
Assert(pageAllocations[page1] != NULL);
Assert(pageAllocations[page1][page2] != NULL);
Assert(pageAllocations[page1][page2][page3] != NULL);
pageAllocations[page1][page2][page3][page4] &= ~(1<<bitindex);
if(--pageAllocations[page1][page2][page3][(1<<kPage4Bits)] == 0)
{
m_BookKeepingMemoryUsage -= ((1<<kPage4Bits)+1)*sizeof(int*);
MemoryManager::LowLevelFree (pageAllocations[page1][page2][page3]);
pageAllocations[page1][page2][page3] = NULL;
}
if(--pageAllocations[page1][page2][(1<<kPage3Bits)] == 0)
{
m_BookKeepingMemoryUsage -= ((1<<kPage3Bits)+1)*sizeof(int**);
MemoryManager::LowLevelFree (pageAllocations[page1][page2]);
pageAllocations[page1][page2] = NULL;
}
if(--pageAllocations[page1][(1<<kPage2Bits)] == 0)
{
m_BookKeepingMemoryUsage -= ((1<<kPage2Bits)+1)*sizeof(int***);
MemoryManager::LowLevelFree (pageAllocations[page1]);
pageAllocations[page1] = NULL;
}
if(--pageAllocations[(1<<kPage1Bits)] == 0)
{
m_BookKeepingMemoryUsage -= ((1<<kPage1Bits)+1)*sizeof(int***);
MemoryManager::LowLevelFree (pageAllocations);
pageAllocations = NULL;
}
return true;
}
if(pageAllocations == NULL)
{
if(requestType == kRegister)
{
pageAllocations = (int****)MemoryManager::LowLevelCAllocate((1<<kPage1Bits)+1,sizeof(int****));
m_BookKeepingMemoryUsage += ((1<<kPage1Bits)+1)*sizeof(int****);
pageAllocations[(1<<kPage1Bits)] = 0;
}
else
return false;
}
if(pageAllocations[page1] == NULL)
{
if(requestType == kRegister)
{
pageAllocations[page1] = (int***)MemoryManager::LowLevelCAllocate((1<<kPage2Bits)+1,sizeof(int***));
m_BookKeepingMemoryUsage += ((1<<kPage2Bits)+1)*sizeof(int***);
pageAllocations[page1][(1<<kPage2Bits)] = 0;
}
else
return false;
}
if(pageAllocations[page1][page2] == NULL)
{
if(requestType == kRegister)
{
pageAllocations[page1][page2] = (int**)MemoryManager::LowLevelCAllocate((1<<kPage3Bits)+1,sizeof(int**));
m_BookKeepingMemoryUsage += ((1<<kPage3Bits)+1)*sizeof(int**);
pageAllocations[page1][page2][(1<<kPage3Bits)] = 0;
}
else
return false;
}
if(pageAllocations[page1][page2][page3] == NULL)
{
if(requestType == kRegister)
{
pageAllocations[page1][page2][page3] = (int*)MemoryManager::LowLevelCAllocate((1<<kPage4Bits)+1,sizeof(int*));
m_BookKeepingMemoryUsage += ((1<<kPage4Bits)+1)*sizeof(int*);
pageAllocations[page1][page2][page3][(1<<kPage4Bits)] = 0;
}
else
return false;
}
if(requestType == kTest)
return (pageAllocations[page1][page2][page3][page4] & (1<<bitindex)) != 0;
pageAllocations[page1][page2][page3][(1<<kPage4Bits)]++;
pageAllocations[page1][page2][(1<<kPage3Bits)]++;
pageAllocations[page1][(1<<kPage2Bits)]++;
pageAllocations[(1<<kPage1Bits)]++;
Assert((pageAllocations[page1][page2][page3][page4] & (1<<bitindex)) == 0); // the bit for this pointer should not be set yet
pageAllocations[page1][page2][page3][page4] |= (1<<bitindex);
return true;
}
template<class LLAlloctor>
void* UnityDefaultAllocator<LLAlloctor>::AddHeaderAndFooter( void* ptr, size_t size, int align ) const
{
Assert(align >= kDefaultMemoryAlignment && align <= 16*1024 && IsPowerOfTwo(align));
// calculate required padding for ptr to be aligned after header addition
// ppppppppHHHH***********
int padCount = AllocationHeader::GetRequiredPadding(ptr, align);
void* realPtr = ((char*)ptr) + (padCount + AllocationHeader::GetHeaderSize());
AllocationHeader::Set(realPtr, m_AllocatorIdentifier, size, padCount, align);
return realPtr;
}
template<class LLAlloctor>
void UnityDefaultAllocator<LLAlloctor>::RegisterAllocation( const void* p )
{
Mutex::AutoLock lock(m_AllocLock);
const size_t ptrSize = GetPtrSize(p);
const int overheadSize = AllocationHeader::GetHeader(p)->GetOverheadSize();
RegisterAllocationData(ptrSize, overheadSize);
m_TotalReservedMemory += ptrSize + overheadSize;
AllocationPage<kRegister>(p);
}
template<class LLAlloctor>
void UnityDefaultAllocator<LLAlloctor>::RegisterDeallocation( const void* p )
{
Mutex::AutoLock lock(m_AllocLock);
const size_t ptrSize = GetPtrSize(p);
const int overheadSize = AllocationHeader::GetHeader(p)->GetOverheadSize();
RegisterDeallocationData(ptrSize, overheadSize);
m_TotalReservedMemory -= ptrSize + overheadSize;
AllocationPage<kUnregister>(p);
}
template<class LLAlloctor>
bool UnityDefaultAllocator<LLAlloctor>::Contains (const void* p)
{
Mutex::AutoLock lock(m_AllocLock);
return AllocationPage<kTest>(p);
}
template<class LLAlloctor>
size_t UnityDefaultAllocator<LLAlloctor>::GetPtrSize( const void* ptr ) const
{
return AllocationHeader::GetHeader(ptr)->GetRequestedSize();
}
template<class LLAlloctor>
ProfilerAllocationHeader* UnityDefaultAllocator<LLAlloctor>::GetProfilerHeader(const void* ptr) const
{
// LocalHeader:ProfilerHeader:Data
return AllocationHeader::GetProfilerHeader(ptr);
}
template<class LLAlloctor>
int UnityDefaultAllocator<LLAlloctor>::GetOverheadSize(void* ptr)
{
return AllocationHeader::GetHeader(ptr)->GetOverheadSize();
}
template class UnityDefaultAllocator<LowLevelAllocator>;
#endif
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