/* * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc. */ #include <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; }