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(svn r6973) Add macros to easily create a pool with less code duplication and more opportunities for constant expression evaluation

This commit is contained in:
tron 2006-10-28 10:54:20 +00:00
parent 5cdeab55f0
commit 41e34a1c16
1 changed files with 44 additions and 1 deletions
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45
pool.h
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@ -16,7 +16,7 @@ typedef void MemoryPoolCleanBlock(uint start_item, uint end_item);
* please try to avoid manual calls!
*/
struct MemoryPool {
const char name[10]; ///< Name of the pool (just for debugging)
const char* const name; ///< Name of the pool (just for debugging)
const uint max_blocks; ///< The max amount of blocks this pool can have
const uint block_size_bits; ///< The size of each block in bits
@ -56,4 +56,47 @@ static inline byte *GetItemFromPool(const MemoryPool *pool, uint index)
return (pool->blocks[index >> pool->block_size_bits] + (index & ((1 << pool->block_size_bits) - 1)) * pool->item_size);
}
#define POOL_ENUM(name, type, block_size_bits, max_blocks) \
enum { \
name##_POOL_BLOCK_SIZE_BITS = block_size_bits, \
name##_POOL_MAX_BLOCKS = max_blocks \
};
#define POOL_ACCESSORS(name, type) \
static inline type* Get##name(uint index) \
{ \
assert(index < _##name##_pool.total_items); \
return (type*)( \
_##name##_pool.blocks[index >> name##_POOL_BLOCK_SIZE_BITS] + \
(index & ((1 << name##_POOL_BLOCK_SIZE_BITS) - 1)) * sizeof(type) \
); \
} \
\
static inline uint Get##name##PoolSize(void) \
{ \
return _##name##_pool.total_items; \
}
#define DECLARE_POOL(name, type, block_size_bits, max_blocks) \
POOL_ENUM(name, type, block_size_bits, max_blocks) \
extern MemoryPool _##name##_pool; \
POOL_ACCESSORS(name, type)
#define DEFINE_POOL(name, type, new_block_proc, clean_block_proc) \
MemoryPool _##name##_pool = { \
#name, name##_POOL_MAX_BLOCKS, name##_POOL_BLOCK_SIZE_BITS, sizeof(type), \
new_block_proc, clean_block_proc, \
0, 0, NULL \
};
#define STATIC_POOL(name, type, block_size_bits, max_blocks, new_block_proc, clean_block_proc) \
POOL_ENUM(name, type, block_size_bits, max_blocks) \
static DEFINE_POOL(name, type, new_block_proc, clean_block_proc) \
POOL_ACCESSORS(name, type)
#endif /* POOL_H */