67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
#include "nuklear.h"
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#include "nuklear_internal.h"
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/* ===============================================================
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*
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* POOL
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*
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* ===============================================================*/
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NK_LIB void
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nk_pool_init(struct nk_pool *pool, struct nk_allocator *alloc,
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unsigned int capacity)
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{
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NK_ASSERT(capacity >= 1);
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nk_zero(pool, sizeof(*pool));
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pool->alloc = *alloc;
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pool->capacity = capacity;
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pool->type = NK_BUFFER_DYNAMIC;
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pool->pages = 0;
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}
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NK_LIB void
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nk_pool_free(struct nk_pool *pool)
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{
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struct nk_page *iter;
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if (!pool) return;
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iter = pool->pages;
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if (pool->type == NK_BUFFER_FIXED) return;
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while (iter) {
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struct nk_page *next = iter->next;
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pool->alloc.free(pool->alloc.userdata, iter);
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iter = next;
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}
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}
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NK_LIB void
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nk_pool_init_fixed(struct nk_pool *pool, void *memory, nk_size size)
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{
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nk_zero(pool, sizeof(*pool));
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NK_ASSERT(size >= sizeof(struct nk_page));
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if (size < sizeof(struct nk_page)) return;
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/* first nk_page_element is embedded in nk_page, additional elements follow in adjacent space */
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pool->capacity = (unsigned)(1 + (size - sizeof(struct nk_page)) / sizeof(struct nk_page_element));
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pool->pages = (struct nk_page*)memory;
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pool->type = NK_BUFFER_FIXED;
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pool->size = size;
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}
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NK_LIB struct nk_page_element*
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nk_pool_alloc(struct nk_pool *pool)
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{
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if (!pool->pages || pool->pages->size >= pool->capacity) {
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/* allocate new page */
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struct nk_page *page;
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if (pool->type == NK_BUFFER_FIXED) {
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NK_ASSERT(pool->pages);
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if (!pool->pages) return 0;
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NK_ASSERT(pool->pages->size < pool->capacity);
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return 0;
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} else {
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nk_size size = sizeof(struct nk_page);
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size += (pool->capacity - 1) * sizeof(struct nk_page_element);
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page = (struct nk_page*)pool->alloc.alloc(pool->alloc.userdata,0, size);
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page->next = pool->pages;
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pool->pages = page;
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page->size = 0;
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}
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} return &pool->pages->win[pool->pages->size++];
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}
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