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Added pool freelist struct for readability

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This adds a git_pool_freelist_item struct that makes it a little
easier to follow what's going on with the pool free list block
management code.  It is functionally neutral.
This commit is contained in:
Russell Belfer 2013-03-14 15:08:04 -07:00
parent d85296ab9b
commit 14bedad907
1 changed files with 15 additions and 7 deletions
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22
src/pool.c
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@ -10,6 +10,11 @@ struct git_pool_page {
char data[GIT_FLEX_ARRAY];
};
typedef struct git_pool_freelist_item git_pool_freelist_item;
struct git_pool_freelist_item {
git_pool_freelist_item *next;
};
#define GIT_POOL_MIN_USABLE 4
#define GIT_POOL_MIN_PAGESZ 2 * sizeof(void*)
@ -150,7 +155,7 @@ void *git_pool_malloc(git_pool *pool, uint32_t items)
pool->has_multi_item_alloc = 1;
else if (pool->free_list != NULL) {
ptr = pool->free_list;
pool->free_list = *((void **)pool->free_list);
pool->free_list = ((git_pool_freelist_item *)pool->free_list)->next;
return ptr;
}
@ -235,16 +240,19 @@ char *git_pool_strcat(git_pool *pool, const char *a, const char *b)
void git_pool_free(git_pool *pool, void *ptr)
{
git_pool_freelist_item *item = ptr;
assert(pool && pool->item_size >= sizeof(void*));
if (ptr) {
*((void **)ptr) = pool->free_list;
pool->free_list = ptr;
if (item) {
item->next = pool->free_list;
pool->free_list = item;
}
}
void git_pool_free_array(git_pool *pool, size_t count, void **ptrs)
{
git_pool_freelist_item **items = (git_pool_freelist_item **)ptrs;
size_t i;
assert(pool && ptrs && pool->item_size >= sizeof(void*));
@ -253,10 +261,10 @@ void git_pool_free_array(git_pool *pool, size_t count, void **ptrs)
return;
for (i = count - 1; i > 0; --i)
*((void **)ptrs[i]) = ptrs[i - 1];
items[i]->next = items[i - 1];
*((void **)ptrs[0]) = pool->free_list;
pool->free_list = ptrs[count - 1];
items[i]->next = pool->free_list;
pool->free_list = items[count - 1];
}
uint32_t git_pool__open_pages(git_pool *pool)