108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
|
#ifndef __BLOCKPOOL_H__
|
||
|
|
#define __BLOCKPOOL_H__
|
||
|
|
|
||
|
|
#ifdef _RV_MEM_SYS_SUPPORT
|
||
|
|
|
||
|
|
/*
|
||
|
|
===============================================================================
|
||
|
|
|
||
|
|
Block based allocator for fixed size objects.
|
||
|
|
|
||
|
|
All objects of the 'type' are properly constructed.
|
||
|
|
However, the constructor is not called for re-used objects.
|
||
|
|
|
||
|
|
This is essentially the same as idBlockAlloc found in heap.h. The difference
|
||
|
|
is that rvBlockPool is aware of which system heap it should allocate into.
|
||
|
|
|
||
|
|
===============================================================================
|
||
|
|
*/
|
||
|
|
|
||
|
|
template<class type, int blockSize, byte memoryTag, Rv_Sys_Heap_ID_t heapID>
|
||
|
|
class rvBlockPool {
|
||
|
|
public:
|
||
|
|
rvBlockPool( void );
|
||
|
|
~rvBlockPool( void );
|
||
|
|
|
||
|
|
void Shutdown( void );
|
||
|
|
|
||
|
|
type * Alloc( void );
|
||
|
|
void Free( type *element );
|
||
|
|
|
||
|
|
int GetTotalCount( void ) const { return total; }
|
||
|
|
int GetAllocCount( void ) const { return active; }
|
||
|
|
int GetFreeCount( void ) const { return total - active; }
|
||
|
|
|
||
|
|
size_t Allocated( void ) const { return( total * sizeof( type ) ); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
typedef struct element_s {
|
||
|
|
struct element_s * next;
|
||
|
|
type t;
|
||
|
|
} element_t;
|
||
|
|
typedef struct block_s {
|
||
|
|
element_t elements[blockSize];
|
||
|
|
struct block_s * next;
|
||
|
|
} block_t;
|
||
|
|
|
||
|
|
block_t * blocks;
|
||
|
|
element_t * free;
|
||
|
|
int total;
|
||
|
|
int active;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<class type, int blockSize, byte memoryTag, Rv_Sys_Heap_ID_t heapID>
|
||
|
|
rvBlockPool<type,blockSize,memoryTag,heapID>::rvBlockPool( void ) {
|
||
|
|
blocks = NULL;
|
||
|
|
free = NULL;
|
||
|
|
total = active = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class type, int blockSize, byte memoryTag, Rv_Sys_Heap_ID_t heapID>
|
||
|
|
rvBlockPool<type,blockSize,memoryTag,heapID>::~rvBlockPool( void ) {
|
||
|
|
Shutdown();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class type, int blockSize, byte memoryTag, Rv_Sys_Heap_ID_t heapID>
|
||
|
|
type *rvBlockPool<type,blockSize,memoryTag,heapID>::Alloc( void ) {
|
||
|
|
if ( !free ) {
|
||
|
|
RV_PUSH_SYS_HEAP_ID(heapID);
|
||
|
|
block_t *block = new block_t;
|
||
|
|
RV_POP_HEAP();
|
||
|
|
block->next = blocks;
|
||
|
|
blocks = block;
|
||
|
|
for ( int i = 0; i < blockSize; i++ ) {
|
||
|
|
block->elements[i].next = free;
|
||
|
|
free = &block->elements[i];
|
||
|
|
}
|
||
|
|
total += blockSize;
|
||
|
|
}
|
||
|
|
active++;
|
||
|
|
element_t *element = free;
|
||
|
|
free = free->next;
|
||
|
|
element->next = NULL;
|
||
|
|
return &element->t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class type, int blockSize, byte memoryTag, Rv_Sys_Heap_ID_t heapID>
|
||
|
|
void rvBlockPool<type,blockSize,memoryTag,heapID>::Free( type *t ) {
|
||
|
|
element_t *element = (element_t *)( ( (unsigned char *) t ) - ( (int) &((element_t *)0)->t ) );
|
||
|
|
element->next = free;
|
||
|
|
free = element;
|
||
|
|
active--;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class type, int blockSize, byte memoryTag, Rv_Sys_Heap_ID_t heapID>
|
||
|
|
void rvBlockPool<type,blockSize,memoryTag,heapID>::Shutdown( void ) {
|
||
|
|
while( blocks ) {
|
||
|
|
block_t *block = blocks;
|
||
|
|
blocks = blocks->next;
|
||
|
|
delete block;
|
||
|
|
}
|
||
|
|
blocks = NULL;
|
||
|
|
free = NULL;
|
||
|
|
total = active = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // _RV_MEM_SYS_SUPPORT
|
||
|
|
#endif // __BLOCKPOOL_H__
|