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Simplify mpegplayer a bit and use array-based lists rather than linked lists for stream management. Move a couple useful functions to handle pointer arrays from kernel.c into general.c; mpeglayer now makes use of them.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26101 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sevakis 2010-05-17 12:34:05 +00:00
parent 9fde12676b
commit fcf36dd4f9
15 changed files with 199 additions and 313 deletions
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35
firmware/kernel.c
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@ -27,6 +27,7 @@
#include "system.h"
#include "panic.h"
#include "debug.h"
#include "general.h"
/* Make this nonzero to enable more elaborate checks on objects */
#if defined(DEBUG) || defined(SIMULATOR)
@ -61,40 +62,6 @@ static struct
IF_COP( struct corelock cl; )
} all_queues SHAREDBSS_ATTR;
/****************************************************************************
* Common utilities
****************************************************************************/
/* Find a pointer in a pointer array. Returns the addess of the element if
* found or the address of the terminating NULL otherwise. */
static void ** find_array_ptr(void **arr, void *ptr)
{
void *curr;
for(curr = *arr; curr != NULL && curr != ptr; curr = *(++arr));
return arr;
}
/* Remove a pointer from a pointer array if it exists. Compacts it so that
* no gaps exist. Returns 0 on success and -1 if the element wasn't found. */
static int remove_array_ptr(void **arr, void *ptr)
{
void *curr;
arr = find_array_ptr(arr, ptr);
if(*arr == NULL)
return -1;
/* Found. Slide up following items. */
do
{
void **arr1 = arr + 1;
*arr++ = curr = *arr1;
}
while(curr != NULL);
return 0;
}
/****************************************************************************
* Standard kernel stuff
****************************************************************************/