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Merge team/russell/frame_caching

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There are some situations in Asterisk where ast_frame and/or iax_frame
structures are rapidly allocatted and freed (at least 50 times per second
for one call).

This code significantly improves the performance of ast_frame_header_new(), 
ast_frdup(), ast_frfree(), iax_frame_new(), and iax_frame_free() by keeping
a thread-local cache of these structures and using frames from the cache 
whenever possible instead of calling malloc/free every time.

This commit also converts the ast_frame and iax_frame structures to use the
linked list macros.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@41278 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Russell Bryant
2006-08-29 20:50:36 +00:00
parent d22476348a
commit f7e7161607
16 changed files with 345 additions and 313 deletions
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17
apps/app_milliwatt.c
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@@ -66,10 +66,16 @@ static void milliwatt_release(struct ast_channel *chan, void *data)
static int milliwatt_generate(struct ast_channel *chan, void *data, int len, int samples)
{
struct ast_frame wf;
unsigned char buf[AST_FRIENDLY_OFFSET + 640];
const int maxsamples = sizeof (buf) / sizeof (buf[0]);
int i, *indexp = (int *) data;
struct ast_frame wf = {
.frametype = AST_FRAME_VOICE,
.subclass = AST_FORMAT_ULAW,
.offset = AST_FRIENDLY_OFFSET,
.data = buf + AST_FRIENDLY_OFFSET,
.src = __FUNCTION__,
};
/* Instead of len, use samples, because channel.c generator_force
* generate(chan, tmp, 0, 160) ignores len. In any case, len is
@@ -82,17 +88,8 @@ static int milliwatt_generate(struct ast_channel *chan, void *data, int len, int
samples = maxsamples;
}
len = samples * sizeof (buf[0]);
wf.frametype = AST_FRAME_VOICE;
wf.subclass = AST_FORMAT_ULAW;
wf.offset = AST_FRIENDLY_OFFSET;
wf.mallocd = 0;
wf.data = buf + AST_FRIENDLY_OFFSET;
wf.datalen = len;
wf.samples = samples;
wf.src = "app_milliwatt";
wf.delivery.tv_sec = 0;
wf.delivery.tv_usec = 0;
wf.prev = wf.next = NULL;
/* create a buffer containing the digital milliwatt pattern */
for(i = 0; i < len; i++)
{