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#include "UnityPrefix.h"
#include "MemoryPool.h"
#include "Runtime/Utilities/Word.h"
#include "Runtime/Profiler/MemoryProfiler.h"
#include "Runtime/Utilities/InitializeAndCleanup.h"
static int kMinBlockSize = sizeof(void*);
UNITY_VECTOR(kMemPoolAlloc,MemoryPool*)* MemoryPool::s_MemoryPools = NULL;
void MemoryPool::StaticInitialize()
{
s_MemoryPools = UNITY_NEW(UNITY_VECTOR(kMemPoolAlloc,MemoryPool*),kMemPoolAlloc);
}
void MemoryPool::StaticDestroy()
{
for(size_t i = 0; i < s_MemoryPools->size(); i++)
UNITY_DELETE((*s_MemoryPools)[i],kMemPoolAlloc);
UNITY_DELETE(s_MemoryPools,kMemPoolAlloc);
}
static RegisterRuntimeInitializeAndCleanup s_MemoryPoolCallbacks(MemoryPool::StaticInitialize, MemoryPool::StaticDestroy);
void MemoryPool::RegisterStaticMemoryPool(MemoryPool* pool)
{
s_MemoryPools->push_back(pool);
}
MemoryPool::MemoryPool( bool threadCheck, const char* name, int blockSize, int hintSize, MemLabelId label )
: m_AllocLabel(MemLabelId(label.label, GET_CURRENT_ALLOC_ROOT_HEADER()))
, m_Bubbles(MemLabelId(label.label, GET_CURRENT_ALLOC_ROOT_HEADER()))
#if DEBUGMODE
, m_PeakAllocCount(0)
, m_Name(name)
#endif
{
#if ENABLE_THREAD_CHECK_IN_ALLOCS
m_ThreadCheck = threadCheck;
#endif
if (blockSize < kMinBlockSize)
blockSize = kMinBlockSize;
m_BlockSize = blockSize;
m_BubbleSize = hintSize;
m_BlocksPerBubble = (m_BubbleSize - sizeof(Bubble) + 1) / blockSize;
int usedBubbleSize = sizeof(Bubble) + m_BlocksPerBubble * blockSize - 1;
Assert(usedBubbleSize <= m_BubbleSize);
Assert(m_BubbleSize - usedBubbleSize <= m_BlockSize);
Assert (m_BlocksPerBubble >= 128);
Assert(hintSize % 4096 == 0);
m_AllocateMemoryAutomatically = true;
Reset();
}
MemoryPool::~MemoryPool()
{
#if !UNITY_EDITOR && DEBUGMODE
if (m_AllocCount > 0)
ErrorStringMsg( "Memory pool has %d unallocated objects: %s", m_AllocCount, m_Name ); // some stuff not deallocated?
#endif
DeallocateAll();
}
void MemoryPool::Reset()
{
#if DEBUGMODE
m_AllocCount = 0;
#endif
m_HeadOfFreeList = NULL;
}
void MemoryPool::DeallocateAll()
{
Bubbles::iterator it, itEnd = m_Bubbles.end();
for( it = m_Bubbles.begin(); it != itEnd; ++it )
UNITY_FREE( m_AllocLabel, *it );
m_Bubbles.clear();
Reset();
}
void MemoryPool::PreallocateMemory (int size)
{
bool temp = m_AllocateMemoryAutomatically;
m_AllocateMemoryAutomatically = true;
for (int i=0;i <= size / (m_BlocksPerBubble * m_BlockSize);i++)
{
AllocNewBubble();
}
m_AllocateMemoryAutomatically = temp;
}
void MemoryPool::AllocNewBubble( )
{
if (!m_AllocateMemoryAutomatically)
return;
AssertIf (m_BlocksPerBubble == 1); // can't have 1 element per bubble
Bubble *bubble = (Bubble*)UNITY_MALLOC( m_AllocLabel, m_BubbleSize );
AssertIf( !bubble );
// put to bubble list
m_Bubbles.push_back( bubble );
// setup the free list inside a bubble
void* oldHeadOfFreeList = m_HeadOfFreeList;
m_HeadOfFreeList = bubble->data;
AssertIf( !m_HeadOfFreeList );
void **newBubble = (void**)m_HeadOfFreeList;
for( int j = 0; j < m_BlocksPerBubble-1; ++j )
{
newBubble[0] = (char*)newBubble + m_BlockSize;
newBubble = (void**)newBubble[0];
}
newBubble[0] = oldHeadOfFreeList; // continue with existing free list (or terminate with NULL if no free elements)
// still failure, error out
if( !m_HeadOfFreeList )
{
ErrorString( "out of memory!" );
}
}
void* MemoryPool::Allocate()
{
return Allocate( m_BlockSize );
}
void *MemoryPool::Allocate( size_t amount )
{
#if ENABLE_THREAD_CHECK_IN_ALLOCS
ErrorAndReturnValueIf(m_ThreadCheck && Thread::mainThreadId && !Thread::CurrentThreadIsMainThread(), NULL);
#endif
void *returnBlock;
if( amount > (unsigned int)m_BlockSize ) {
ErrorString( Format("requested larger amount than block size! requested: %d, blocksize: %d", (unsigned)amount, (unsigned)m_BlockSize ));
return NULL;
}
if( !m_HeadOfFreeList ) {
// allocate new bubble
AllocNewBubble();
// Can't allocate
if( m_HeadOfFreeList == NULL )
return NULL;
}
#if DEBUGMODE
++m_AllocCount;
if( m_AllocCount > m_PeakAllocCount )
m_PeakAllocCount = m_AllocCount;
#endif
returnBlock = m_HeadOfFreeList;
// move the pointer to the next block
m_HeadOfFreeList = *((void**)m_HeadOfFreeList);
return returnBlock;
}
void MemoryPool::Deallocate( void *mem_Block )
{
#if ENABLE_THREAD_CHECK_IN_ALLOCS
ErrorAndReturnIf(m_ThreadCheck && Thread::mainThreadId && !Thread::CurrentThreadIsMainThread());
#endif
if( !mem_Block ) // ignore NULL deletes
return;
#if DEBUGMODE
// check to see if the memory is from the allocated range
bool ok = false;
size_t n = m_Bubbles.size();
for( size_t i = 0; i < n; ++i ) {
Bubble* p = m_Bubbles[i];
if( (char*)mem_Block >= p->data && (char*)mem_Block < (p->data + m_BlockSize * m_BlocksPerBubble) ) {
ok = true;
break;
}
}
AssertIf( !ok );
#endif
#if DEBUGMODE
// invalidate the memory
memset( mem_Block, 0xDD, m_BlockSize );
AssertIf(m_AllocCount == 0);
#endif
#if DEBUGMODE
--m_AllocCount;
#endif
// make the block point to the first free item in the list
*((void**)mem_Block) = m_HeadOfFreeList;
// the list head is now the Deallocated block
m_HeadOfFreeList = mem_Block;
}
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