devs/foxbox
1
0
Fork 0
forked from len0rd/rockbox
Code Pull requests Activity

buflib: Try harder in buflib_alloc_maximum().

Browse source 
This function will now ask shrinkable allocations to give up all of their
memory. With future support of playback.c this can be used as a safe
replacement for audio_get_buffer().

Change-Id: I290a51d2c75254e66baf5698c41dc444dea6247a
This commit is contained in:
Thomas Martitz 2013-05-29 07:12:01 +02:00
parent 9f878b105d
commit d25a512caf
2 changed files with 17 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

13
firmware/buflib.c
View file

@ -724,7 +724,18 @@ buflib_alloc_maximum(struct buflib_context* ctx, const char* name, size_t *size,
/* limit name to 16 since that's what buflib_available() accounts for it */
char buf[16];
*size = buflib_available(ctx);
/* ignore ctx->compact because it's true if all movable blocks are contiguous
* even if the buffer has holes due to unmovable allocations */
unsigned hints;
size_t bufsize = ctx->handle_table - ctx->buf_start;
bufsize = MIN(BUFLIB_SHRINK_SIZE_MASK, bufsize*sizeof(union buflib_data)); /* make it bytes */
/* try as hard as possible to free up space. allocations are
* welcome to give up some or all of their memory */
hints = BUFLIB_SHRINK_POS_BACK | BUFLIB_SHRINK_POS_FRONT | bufsize;
/* compact until no space can be gained anymore */
while (buflib_compact_and_shrink(ctx, hints));
*size = buflib_allocatable(ctx);
if (*size <= 0) /* OOM */
return -1;