| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2015 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <commonlib/mem_pool.h> |
| #include <stdlib.h> |
| |
| void *mem_pool_alloc(struct mem_pool *mp, size_t sz) |
| { |
| void *p; |
| |
| /* Make all allocations be at least 8 byte aligned. */ |
| sz = ALIGN_UP(sz, 8); |
| |
| /* Determine if any space available. */ |
| if ((mp->size - mp->free_offset) < sz) |
| return NULL; |
| |
| p = &mp->buf[mp->free_offset]; |
| |
| mp->free_offset += sz; |
| mp->last_alloc = p; |
| |
| return p; |
| } |
| |
| void mem_pool_free(struct mem_pool *mp, void *p) |
| { |
| /* Determine if p was the most recent allocation. */ |
| if (p == NULL || mp->last_alloc != p) |
| return; |
| |
| mp->free_offset = mp->last_alloc - mp->buf; |
| /* No way to track allocation before this one. */ |
| mp->last_alloc = NULL; |
| } |