mirror of
https://github.com/git/git
synced 2024-08-28 12:09:19 +00:00
![Jameson Miller](/assets/img/avatar_default.png)
This moves the reusable parts of the memory pool logic used by fast-import.c into its own file for use by other components. Signed-off-by: Jameson Miller <jamill@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
|
|
* Memory Pool implementation logic.
|
|
*/
|
|
|
|
#include "cache.h"
|
|
#include "mem-pool.h"
|
|
|
|
static struct mp_block *mem_pool_alloc_block(struct mem_pool *mem_pool, size_t block_alloc)
|
|
{
|
|
struct mp_block *p;
|
|
|
|
mem_pool->pool_alloc += sizeof(struct mp_block) + block_alloc;
|
|
p = xmalloc(st_add(sizeof(struct mp_block), block_alloc));
|
|
p->next_block = mem_pool->mp_block;
|
|
p->next_free = (char *)p->space;
|
|
p->end = p->next_free + block_alloc;
|
|
mem_pool->mp_block = p;
|
|
|
|
return p;
|
|
}
|
|
|
|
void *mem_pool_alloc(struct mem_pool *mem_pool, size_t len)
|
|
{
|
|
struct mp_block *p;
|
|
void *r;
|
|
|
|
/* round up to a 'uintmax_t' alignment */
|
|
if (len & (sizeof(uintmax_t) - 1))
|
|
len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1));
|
|
|
|
for (p = mem_pool->mp_block; p; p = p->next_block)
|
|
if (p->end - p->next_free >= len)
|
|
break;
|
|
|
|
if (!p) {
|
|
if (len >= (mem_pool->block_alloc / 2)) {
|
|
mem_pool->pool_alloc += len;
|
|
return xmalloc(len);
|
|
}
|
|
|
|
p = mem_pool_alloc_block(mem_pool, mem_pool->block_alloc);
|
|
}
|
|
|
|
r = p->next_free;
|
|
p->next_free += len;
|
|
return r;
|
|
}
|
|
|
|
void *mem_pool_calloc(struct mem_pool *mem_pool, size_t count, size_t size)
|
|
{
|
|
size_t len = st_mult(count, size);
|
|
void *r = mem_pool_alloc(mem_pool, len);
|
|
memset(r, 0, len);
|
|
return r;
|
|
}
|