diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/synth/util_mem.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/synth/util_mem.c | 211 |
1 files changed, 0 insertions, 211 deletions
diff --git a/ANDROID_3.4.5/sound/synth/util_mem.c b/ANDROID_3.4.5/sound/synth/util_mem.c deleted file mode 100644 index 8e34bc4e..00000000 --- a/ANDROID_3.4.5/sound/synth/util_mem.c +++ /dev/null @@ -1,211 +0,0 @@ -/* - * Copyright (C) 2000 Takashi Iwai <tiwai@suse.de> - * - * Generic memory management routines for soundcard memory allocation - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/mutex.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/module.h> -#include <sound/core.h> -#include <sound/util_mem.h> - -MODULE_AUTHOR("Takashi Iwai"); -MODULE_DESCRIPTION("Generic memory management routines for soundcard memory allocation"); -MODULE_LICENSE("GPL"); - -#define get_memblk(p) list_entry(p, struct snd_util_memblk, list) - -/* - * create a new memory manager - */ -struct snd_util_memhdr * -snd_util_memhdr_new(int memsize) -{ - struct snd_util_memhdr *hdr; - - hdr = kzalloc(sizeof(*hdr), GFP_KERNEL); - if (hdr == NULL) - return NULL; - hdr->size = memsize; - mutex_init(&hdr->block_mutex); - INIT_LIST_HEAD(&hdr->block); - - return hdr; -} - -/* - * free a memory manager - */ -void snd_util_memhdr_free(struct snd_util_memhdr *hdr) -{ - struct list_head *p; - - if (!hdr) - return; - /* release all blocks */ - while ((p = hdr->block.next) != &hdr->block) { - list_del(p); - kfree(get_memblk(p)); - } - kfree(hdr); -} - -/* - * allocate a memory block (without mutex) - */ -struct snd_util_memblk * -__snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size) -{ - struct snd_util_memblk *blk; - unsigned int units, prev_offset; - struct list_head *p; - - if (snd_BUG_ON(!hdr || size <= 0)) - return NULL; - - /* word alignment */ - units = size; - if (units & 1) - units++; - if (units > hdr->size) - return NULL; - - /* look for empty block */ - prev_offset = 0; - list_for_each(p, &hdr->block) { - blk = get_memblk(p); - if (blk->offset - prev_offset >= units) - goto __found; - prev_offset = blk->offset + blk->size; - } - if (hdr->size - prev_offset < units) - return NULL; - -__found: - return __snd_util_memblk_new(hdr, units, p->prev); -} - - -/* - * create a new memory block with the given size - * the block is linked next to prev - */ -struct snd_util_memblk * -__snd_util_memblk_new(struct snd_util_memhdr *hdr, unsigned int units, - struct list_head *prev) -{ - struct snd_util_memblk *blk; - - blk = kmalloc(sizeof(struct snd_util_memblk) + hdr->block_extra_size, - GFP_KERNEL); - if (blk == NULL) - return NULL; - - if (prev == &hdr->block) - blk->offset = 0; - else { - struct snd_util_memblk *p = get_memblk(prev); - blk->offset = p->offset + p->size; - } - blk->size = units; - list_add(&blk->list, prev); - hdr->nblocks++; - hdr->used += units; - return blk; -} - - -/* - * allocate a memory block (with mutex) - */ -struct snd_util_memblk * -snd_util_mem_alloc(struct snd_util_memhdr *hdr, int size) -{ - struct snd_util_memblk *blk; - mutex_lock(&hdr->block_mutex); - blk = __snd_util_mem_alloc(hdr, size); - mutex_unlock(&hdr->block_mutex); - return blk; -} - - -/* - * remove the block from linked-list and free resource - * (without mutex) - */ -void -__snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk) -{ - list_del(&blk->list); - hdr->nblocks--; - hdr->used -= blk->size; - kfree(blk); -} - -/* - * free a memory block (with mutex) - */ -int snd_util_mem_free(struct snd_util_memhdr *hdr, struct snd_util_memblk *blk) -{ - if (snd_BUG_ON(!hdr || !blk)) - return -EINVAL; - - mutex_lock(&hdr->block_mutex); - __snd_util_mem_free(hdr, blk); - mutex_unlock(&hdr->block_mutex); - return 0; -} - -/* - * return available memory size - */ -int snd_util_mem_avail(struct snd_util_memhdr *hdr) -{ - unsigned int size; - mutex_lock(&hdr->block_mutex); - size = hdr->size - hdr->used; - mutex_unlock(&hdr->block_mutex); - return size; -} - - -EXPORT_SYMBOL(snd_util_memhdr_new); -EXPORT_SYMBOL(snd_util_memhdr_free); -EXPORT_SYMBOL(snd_util_mem_alloc); -EXPORT_SYMBOL(snd_util_mem_free); -EXPORT_SYMBOL(snd_util_mem_avail); -EXPORT_SYMBOL(__snd_util_mem_alloc); -EXPORT_SYMBOL(__snd_util_mem_free); -EXPORT_SYMBOL(__snd_util_memblk_new); - -/* - * INIT part - */ - -static int __init alsa_util_mem_init(void) -{ - return 0; -} - -static void __exit alsa_util_mem_exit(void) -{ -} - -module_init(alsa_util_mem_init) -module_exit(alsa_util_mem_exit) |