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Fix swap_subs for better locking 

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@2746 f38db490-d61c-443f-a65b-d21fe96a405b
This commit is contained in:
markster 2004-04-22 16:02:56 +00:00
parent 3af23d948d
commit eaae3eb463
1 changed files with 22 additions and 8 deletions
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30
channels/chan_zap.c
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@ -618,12 +618,29 @@ static int zt_get_index(struct ast_channel *ast, struct zt_pvt *p, int nullok)
return res;
}
static void wakeup_sub(struct zt_pvt *p, int a)
{
struct ast_frame null = { AST_FRAME_NULL, };
for (;;) {
if (p->subs[a].owner) {
if (ast_mutex_trylock(&p->subs[a].owner->lock)) {
ast_mutex_unlock(&p->lock);
usleep(1);
ast_mutex_lock(&p->lock);
} else {
ast_queue_frame(p->subs[a].owner, &null);
ast_mutex_unlock(&p->subs[a].owner->lock);
}
} else
break;
}
}
static void swap_subs(struct zt_pvt *p, int a, int b)
{
int tchan;
int tinthreeway;
struct ast_channel *towner;
struct ast_frame null = { AST_FRAME_NULL, };
ast_log(LOG_DEBUG, "Swapping %d and %d\n", a, b);
@ -639,15 +656,12 @@ static void swap_subs(struct zt_pvt *p, int a, int b)
p->subs[b].owner = towner;
p->subs[b].inthreeway = tinthreeway;
if (p->subs[a].owner) {
if (p->subs[a].owner)
p->subs[a].owner->fds[0] = p->subs[a].zfd;
ast_queue_frame(p->subs[a].owner, &null);
}
if (p->subs[b].owner) {
if (p->subs[b].owner)
p->subs[b].owner->fds[0] = p->subs[b].zfd;
ast_queue_frame(p->subs[b].owner, &null);
}
wakeup_sub(p, a);
wakeup_sub(p, b);
}
static int zt_open(char *fn)