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This file is part of Open Sound System.
Copyright (C) 4Front Technologies 1996-2008.
This this source file is released under GPL v2 license (no other versions). See the COPYING file included in the main directory of this source distribution for the license terms and conditions.
#include <oss_config.h>
struct _oss_memblk_t
{
oss_memblk_t *next;
void *addr;
};
oss_memblk_t *oss_global_memblk=NULL;
void
*oss_memblk_malloc(oss_memblk_t **blk, int size)
{
oss_memblk_t *newblk;
newblk = KERNEL_MALLOC (sizeof(oss_memblk_t) + size);
newblk->addr = newblk +1;
newblk->next = NULL;
if (*blk == NULL)
{
No earlier memory blocks in the chain.
*blk = newblk; return newblk->addr; }
Add this block to the chain.
newblk->next = *blk;
*blk = newblk;
return newblk->addr;
}
void
oss_memblk_free(oss_memblk_t **blk, void *addr)
{
oss_memblk_t *this_one = *blk, *prev = NULL;
while (this_one != NULL)
{
if (this_one->addr == addr)
{
if (prev == NULL) /* First one in the chain */
{
*blk = this_one->next;
KERNEL_FREE (this_one);
}
else
{
prev->next = this_one->next;
KERNEL_FREE (this_one);
}
return;
}
this_one = this_one->next;
}
}
void
oss_memblk_unalloc(oss_memblk_t **blk)
{
Free all memory allocations on the chain.
oss_memblk_t *this_one = *blk;
while (this_one != NULL)
{
oss_memblk_t *next_one;
next_one = this_one->next;
KERNEL_FREE(this_one);
this_one = next_one;
}
*blk = NULL;
}