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+added threshold to the memory pool.

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This commit is contained in:
Wang Renxin 2015-10-23 14:22:19 +08:00
parent 9d331708bc
commit ee84f820a4
1 changed files with 33 additions and 0 deletions
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33
shell/main.c
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@ -141,6 +141,10 @@ static _pool_t* pool = 0;
static long alloc_count = 0;
static long alloc_bytes = 0;
static long in_pool_count = 0;
static long in_pool_bytes = 0;
#define _POOL_THRESHOLD_COUNT 1024
#define _POOL_NODE_ALLOC(size) (((char*)malloc(sizeof(_pool_tag_t) + size)) + sizeof(_pool_tag_t))
#define _POOL_NODE_PTR(s) (s - sizeof(_pool_tag_t))
@ -157,6 +161,27 @@ static int _cmp_size_t(const void* l, const void* r) {
else return 0;
}
static void _tidy_mem_pool(void) {
int i = 0;
char* s = 0;
if(in_pool_count < _POOL_THRESHOLD_COUNT)
return;
if(!pool_count)
return;
for(i = 0; i < pool_count; i++) {
while((s = pool[i].stack)) {
pool[i].stack = _POOL_NODE_NEXT(s);
_POOL_NODE_FREE(s);
}
}
in_pool_count = 0;
in_pool_bytes = 0;
}
static void _open_mem_pool(void) {
#define N 19
size_t szs[N];
@ -245,6 +270,9 @@ static char* _pop_mem(unsigned s) {
pl = &pool[i];
if(s <= pl->size) {
if(pl->stack) {
in_pool_count--;
in_pool_bytes -= (long)(_pool_chunk_size_t)s;
/* Pop from stack */
result = pl->stack;
pl->stack = _POOL_NODE_NEXT(result);
@ -282,10 +310,15 @@ static void _push_mem(char* p) {
for(i = 0; i < pool_count; i++) {
pl = &pool[i];
if(_POOL_NODE_SIZE(p) <= pl->size) {
in_pool_count++;
in_pool_bytes += _POOL_NODE_SIZE(p);
/* Push to stack */
_POOL_NODE_NEXT(p) = pl->stack;
pl->stack = p;
_tidy_mem_pool();
return;
}
}