diff options
Diffstat (limited to 'third_party/git/mem-pool.c')
-rw-r--r-- | third_party/git/mem-pool.c | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/third_party/git/mem-pool.c b/third_party/git/mem-pool.c deleted file mode 100644 index a2841a4a9a..0000000000 --- a/third_party/git/mem-pool.c +++ /dev/null @@ -1,145 +0,0 @@ -/* - * Memory Pool implementation logic. - */ - -#include "cache.h" -#include "mem-pool.h" - -#define BLOCK_GROWTH_SIZE 1024*1024 - sizeof(struct mp_block); - -/* - * Allocate a new mp_block and insert it after the block specified in - * `insert_after`. If `insert_after` is NULL, then insert block at the - * head of the linked list. - */ -static struct mp_block *mem_pool_alloc_block(struct mem_pool *mem_pool, size_t block_alloc, struct mp_block *insert_after) -{ - 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_free = (char *)p->space; - p->end = p->next_free + block_alloc; - - if (insert_after) { - p->next_block = insert_after->next_block; - insert_after->next_block = p; - } else { - p->next_block = mem_pool->mp_block; - mem_pool->mp_block = p; - } - - return p; -} - -void mem_pool_init(struct mem_pool **mem_pool, size_t initial_size) -{ - struct mem_pool *pool; - - if (*mem_pool) - return; - - pool = xcalloc(1, sizeof(*pool)); - - pool->block_alloc = BLOCK_GROWTH_SIZE; - - if (initial_size > 0) - mem_pool_alloc_block(pool, initial_size, NULL); - - *mem_pool = pool; -} - -void mem_pool_discard(struct mem_pool *mem_pool, int invalidate_memory) -{ - struct mp_block *block, *block_to_free; - - block = mem_pool->mp_block; - while (block) - { - block_to_free = block; - block = block->next_block; - - if (invalidate_memory) - memset(block_to_free->space, 0xDD, ((char *)block_to_free->end) - ((char *)block_to_free->space)); - - free(block_to_free); - } - - free(mem_pool); -} - -void *mem_pool_alloc(struct mem_pool *mem_pool, size_t len) -{ - struct mp_block *p = NULL; - void *r; - - /* round up to a 'uintmax_t' alignment */ - if (len & (sizeof(uintmax_t) - 1)) - len += sizeof(uintmax_t) - (len & (sizeof(uintmax_t) - 1)); - - if (mem_pool->mp_block && - mem_pool->mp_block->end - mem_pool->mp_block->next_free >= len) - p = mem_pool->mp_block; - - if (!p) { - if (len >= (mem_pool->block_alloc / 2)) - return mem_pool_alloc_block(mem_pool, len, mem_pool->mp_block); - - p = mem_pool_alloc_block(mem_pool, mem_pool->block_alloc, NULL); - } - - 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; -} - -int mem_pool_contains(struct mem_pool *mem_pool, void *mem) -{ - struct mp_block *p; - - /* Check if memory is allocated in a block */ - for (p = mem_pool->mp_block; p; p = p->next_block) - if ((mem >= ((void *)p->space)) && - (mem < ((void *)p->end))) - return 1; - - return 0; -} - -void mem_pool_combine(struct mem_pool *dst, struct mem_pool *src) -{ - struct mp_block *p; - - /* Append the blocks from src to dst */ - if (dst->mp_block && src->mp_block) { - /* - * src and dst have blocks, append - * blocks from src to dst. - */ - p = dst->mp_block; - while (p->next_block) - p = p->next_block; - - p->next_block = src->mp_block; - } else if (src->mp_block) { - /* - * src has blocks, dst is empty. - */ - dst->mp_block = src->mp_block; - } else { - /* src is empty, nothing to do. */ - } - - dst->pool_alloc += src->pool_alloc; - src->pool_alloc = 0; - src->mp_block = NULL; -} |