diff options
author | Aaron Durbin <adurbin@chromium.org> | 2015-09-08 13:34:43 -0500 |
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committer | Aaron Durbin <adurbin@chromium.org> | 2015-09-22 21:21:34 +0000 |
commit | dc9f5cd54661e5ba3fffee7af0ba17dde9367b95 (patch) | |
tree | 43b5eca98ba0b09390ff9a6d1174c2e0cce94e1b /src/commonlib/mem_pool.c | |
parent | 4b93a4f47a7457162d1be20eeffe57f81d5cd6af (diff) | |
download | coreboot-dc9f5cd54661e5ba3fffee7af0ba17dde9367b95.tar.xz |
coreboot: introduce commonlib
Instead of reaching into src/include and re-writing code
allow for cleaner code sharing within coreboot and its
utilities. The additional thing needed at this point is
for the utilities to provide a printk() declaration within
a <console/console.h> file. That way code which uses printk()
can than be mapped properly to verbosity of utility parameters.
Change-Id: I9e46a279569733336bc0a018aed96bc924c07cdd
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/11592
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Diffstat (limited to 'src/commonlib/mem_pool.c')
-rw-r--r-- | src/commonlib/mem_pool.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/commonlib/mem_pool.c b/src/commonlib/mem_pool.c new file mode 100644 index 0000000000..a7292f3036 --- /dev/null +++ b/src/commonlib/mem_pool.c @@ -0,0 +1,51 @@ +/* + * 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 <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; +} |