[asterisk-commits] rmudgett: trunk r261822 - /trunk/channels/sig_pri.c
SVN commits to the Asterisk project
asterisk-commits at lists.digium.com
Thu May 6 18:41:26 CDT 2010
Author: rmudgett
Date: Thu May 6 18:41:22 2010
New Revision: 261822
URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=261822
Log:
Some code optimizations.
* Made more places use pri_queue_control() instead of pri_queue_frame()
and a local frame variable.
* Made pri_queue_frame() use sig_pri_lock_owner(). pri_queue_frame() no
longer releases the libpri access lock unless it is required.
* Made the pri_queue_frame() and pri_queue_control() parameter list
similar to sig_pri_lock_owner().
Modified:
trunk/channels/sig_pri.c
Modified: trunk/channels/sig_pri.c
URL: http://svnview.digium.com/svn/asterisk/trunk/channels/sig_pri.c?view=diff&rev=261822&r1=261821&r2=261822
==============================================================================
--- trunk/channels/sig_pri.c (original)
+++ trunk/channels/sig_pri.c Thu May 6 18:41:22 2010
@@ -895,37 +895,85 @@
return 0;
}
-static void pri_queue_frame(struct sig_pri_chan *p, struct ast_frame *f, struct sig_pri_pri *pri)
-{
- /* We must unlock the PRI to avoid the possibility of a deadlock */
- if (pri)
+/*!
+ * \internal
+ * \brief Obtain the sig_pri owner channel lock if the owner exists.
+ * \since 1.8
+ *
+ * \param pri sig_pri PRI control structure.
+ * \param chanpos Channel position in the span.
+ *
+ * \note Assumes the pri->lock is already obtained.
+ * \note Assumes the sig_pri_lock_private(pri->pvts[chanpos]) is already obtained.
+ *
+ * \return Nothing
+ */
+static void sig_pri_lock_owner(struct sig_pri_pri *pri, int chanpos)
+{
+ for (;;) {
+ if (!pri->pvts[chanpos]->owner) {
+ /* There is no owner lock to get. */
+ break;
+ }
+ if (!ast_channel_trylock(pri->pvts[chanpos]->owner)) {
+ /* We got the lock */
+ break;
+ }
+ /* We must unlock the PRI to avoid the possibility of a deadlock */
ast_mutex_unlock(&pri->lock);
- for (;;) {
- if (p->owner) {
- if (ast_channel_trylock(p->owner)) {
- PRI_DEADLOCK_AVOIDANCE(p);
- } else {
- ast_queue_frame(p->owner, f);
- ast_channel_unlock(p->owner);
- break;
- }
- } else
- break;
- }
- if (pri)
+ PRI_DEADLOCK_AVOIDANCE(pri->pvts[chanpos]);
ast_mutex_lock(&pri->lock);
-}
-
-static void pri_queue_control(struct sig_pri_chan *p, int subclass, struct sig_pri_pri *pri)
+ }
+}
+
+/*!
+ * \internal
+ * \brief Queue the given frame onto the owner channel.
+ * \since 1.8
+ *
+ * \param pri sig_pri PRI control structure.
+ * \param chanpos Channel position in the span.
+ * \param frame Frame to queue onto the owner channel.
+ *
+ * \note Assumes the pri->lock is already obtained.
+ * \note Assumes the sig_pri_lock_private(pri->pvts[chanpos]) is already obtained.
+ *
+ * \return Nothing
+ */
+static void pri_queue_frame(struct sig_pri_pri *pri, int chanpos, struct ast_frame *frame)
+{
+ sig_pri_lock_owner(pri, chanpos);
+ if (pri->pvts[chanpos]->owner) {
+ ast_queue_frame(pri->pvts[chanpos]->owner, frame);
+ ast_channel_unlock(pri->pvts[chanpos]->owner);
+ }
+}
+
+/*!
+ * \internal
+ * \brief Queue a control frame of the specified subclass onto the owner channel.
+ * \since 1.8
+ *
+ * \param pri sig_pri PRI control structure.
+ * \param chanpos Channel position in the span.
+ * \param subclass Control frame subclass to queue onto the owner channel.
+ *
+ * \note Assumes the pri->lock is already obtained.
+ * \note Assumes the sig_pri_lock_private(pri->pvts[chanpos]) is already obtained.
+ *
+ * \return Nothing
+ */
+static void pri_queue_control(struct sig_pri_pri *pri, int chanpos, int subclass)
{
struct ast_frame f = {AST_FRAME_CONTROL, };
+ struct sig_pri_chan *p = pri->pvts[chanpos];
if (p->calls->queue_control) {
p->calls->queue_control(p->chan_pvt, subclass);
}
f.subclass.integer = subclass;
- pri_queue_frame(p, &f, pri);
+ pri_queue_frame(pri, chanpos, &f);
}
static int pri_find_principle(struct sig_pri_pri *pri, int channel, q931_call *call)
@@ -1521,37 +1569,6 @@
return 0;
}
-/*!
- * \internal
- * \brief Obtain the sig_pri owner channel lock if the owner exists.
- * \since 1.8
- *
- * \param pri sig_pri PRI control structure.
- * \param chanpos Channel position in the span.
- *
- * \note Assumes the pri->lock is already obtained.
- * \note Assumes the sig_pri_lock_private(pri->pvts[chanpos]) is already obtained.
- *
- * \return Nothing
- */
-static void sig_pri_lock_owner(struct sig_pri_pri *pri, int chanpos)
-{
- for (;;) {
- if (!pri->pvts[chanpos]->owner) {
- /* There is no owner lock to get. */
- break;
- }
- if (!ast_channel_trylock(pri->pvts[chanpos]->owner)) {
- /* We got the lock */
- break;
- }
- /* We must unlock the PRI to avoid the possibility of a deadlock */
- ast_mutex_unlock(&pri->lock);
- PRI_DEADLOCK_AVOIDANCE(pri->pvts[chanpos]);
- ast_mutex_lock(&pri->lock);
- }
-}
-
#if defined(HAVE_PRI_CCSS)
/*!
* \internal
@@ -2533,8 +2550,13 @@
} else {
struct ast_frame f = { AST_FRAME_CONTROL, };
+ /*
+ * Things are in an odd state here so we cannot use pri_queue_control().
+ * However, we already have the owner lock so we can simply queue the frame.
+ */
f.subclass.integer = AST_CONTROL_HOLD;
ast_queue_frame(owner, &f);
+
sig_pri_span_devstate_changed(pri);
retval = 0;
}
@@ -2602,12 +2624,7 @@
sig_pri_lock_private(pri->pvts[chanpos]);
sig_pri_handle_subcmds(pri, chanpos, ev->e, ev->retrieve.channel,
ev->retrieve.subcmds, ev->retrieve.call);
- {
- struct ast_frame f = { AST_FRAME_CONTROL, };
-
- f.subclass.integer = AST_CONTROL_UNHOLD;
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
- }
+ pri_queue_control(pri, chanpos, AST_CONTROL_UNHOLD);
sig_pri_unlock_private(pri->pvts[chanpos]);
sig_pri_span_devstate_changed(pri);
pri_retrieve_ack(pri->pri, ev->retrieve.call,
@@ -2953,7 +2970,7 @@
for (i = 0; i < digitlen; i++) {
struct ast_frame f = { AST_FRAME_DTMF, .subclass.integer = e->digit.digits[i], };
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_frame(pri, chanpos, &f);
}
}
sig_pri_unlock_private(pri->pvts[chanpos]);
@@ -2988,7 +3005,7 @@
for (i = 0; i < digitlen; i++) {
struct ast_frame f = { AST_FRAME_DTMF, .subclass.integer = e->ring.callednum[i], };
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_frame(pri, chanpos, &f);
}
}
sig_pri_unlock_private(pri->pvts[chanpos]);
@@ -3430,7 +3447,7 @@
e->ringing.subcmds, e->ringing.call);
sig_pri_cc_generic_check(pri, chanpos, AST_CC_CCNR);
sig_pri_set_echocanceller(pri->pvts[chanpos], 1);
- pri_queue_control(pri->pvts[chanpos], AST_CONTROL_RINGING, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_RINGING);
pri->pvts[chanpos]->alerting = 1;
#ifdef SUPPORT_USERUSER
@@ -3469,8 +3486,9 @@
|| (e->proceeding.progress == 8)
#endif
) {
- struct ast_frame f = { AST_FRAME_CONTROL, .subclass.integer = AST_CONTROL_PROGRESS, };
-
+ int subclass;
+
+ subclass = AST_CONTROL_PROGRESS;
if (e->proceeding.cause > -1) {
ast_verb(3, "PROGRESS with cause code %d received\n", e->proceeding.cause);
@@ -3480,14 +3498,14 @@
ast_verb(3, "PROGRESS with 'user busy' received, signaling AST_CONTROL_BUSY instead of AST_CONTROL_PROGRESS\n");
pri->pvts[chanpos]->owner->hangupcause = e->proceeding.cause;
- f.subclass.integer = AST_CONTROL_BUSY;
+ subclass = AST_CONTROL_BUSY;
}
}
}
ast_debug(1, "Queuing frame from PRI_EVENT_PROGRESS on channel %d/%d span %d\n",
pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset,pri->span);
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_control(pri, chanpos, subclass);
if (
#ifdef PRI_PROGRESS_MASK
e->proceeding.progressmask & PRI_PROG_INBAND_AVAILABLE
@@ -3496,8 +3514,7 @@
#endif
) {
/* Bring voice path up */
- f.subclass.integer = AST_CONTROL_PROGRESS;
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_PROGRESS);
}
pri->pvts[chanpos]->progress = 1;
sig_pri_set_dialing(pri->pvts[chanpos], 0);
@@ -3517,11 +3534,9 @@
sig_pri_handle_subcmds(pri, chanpos, e->e, e->proceeding.channel,
e->proceeding.subcmds, e->proceeding.call);
if (!pri->pvts[chanpos]->proceeding) {
- struct ast_frame f = { AST_FRAME_CONTROL, .subclass.integer = AST_CONTROL_PROCEEDING, };
-
ast_debug(1, "Queuing frame from PRI_EVENT_PROCEEDING on channel %d/%d span %d\n",
pri->pvts[chanpos]->logicalspan, pri->pvts[chanpos]->prioffset,pri->span);
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_PROCEEDING);
if (
#ifdef PRI_PROGRESS_MASK
e->proceeding.progressmask & PRI_PROG_INBAND_AVAILABLE
@@ -3530,8 +3545,7 @@
#endif
) {
/* Bring voice path up */
- f.subclass.integer = AST_CONTROL_PROGRESS;
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_PROGRESS);
}
pri->pvts[chanpos]->proceeding = 1;
sig_pri_set_dialing(pri->pvts[chanpos], 0);
@@ -3593,7 +3607,7 @@
sig_pri_handle_subcmds(pri, chanpos, e->e, e->answer.channel,
e->answer.subcmds, e->answer.call);
- pri_queue_control(pri->pvts[chanpos], AST_CONTROL_ANSWER, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_ANSWER);
/* Enable echo cancellation if it's not on already */
sig_pri_set_dialing(pri->pvts[chanpos], 0);
sig_pri_set_echocanceller(pri->pvts[chanpos], 1);
@@ -3655,7 +3669,7 @@
default:
switch (e->hangup.cause) {
case PRI_CAUSE_USER_BUSY:
- pri_queue_control(pri->pvts[chanpos], AST_CONTROL_BUSY, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_BUSY);
break;
case PRI_CAUSE_CALL_REJECTED:
case PRI_CAUSE_NETWORK_OUT_OF_ORDER:
@@ -3663,7 +3677,7 @@
case PRI_CAUSE_SWITCH_CONGESTION:
case PRI_CAUSE_DESTINATION_OUT_OF_ORDER:
case PRI_CAUSE_NORMAL_TEMPORARY_FAILURE:
- pri_queue_control(pri->pvts[chanpos], AST_CONTROL_CONGESTION, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_CONGESTION);
break;
default:
ast_softhangup_nolock(pri->pvts[chanpos]->owner, AST_SOFTHANGUP_DEV);
@@ -3756,7 +3770,7 @@
default:
switch (e->hangup.cause) {
case PRI_CAUSE_USER_BUSY:
- pri_queue_control(pri->pvts[chanpos], AST_CONTROL_BUSY, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_BUSY);
break;
case PRI_CAUSE_CALL_REJECTED:
case PRI_CAUSE_NETWORK_OUT_OF_ORDER:
@@ -3764,7 +3778,7 @@
case PRI_CAUSE_SWITCH_CONGESTION:
case PRI_CAUSE_DESTINATION_OUT_OF_ORDER:
case PRI_CAUSE_NORMAL_TEMPORARY_FAILURE:
- pri_queue_control(pri->pvts[chanpos], AST_CONTROL_CONGESTION, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_CONGESTION);
break;
default:
ast_softhangup_nolock(pri->pvts[chanpos]->owner, AST_SOFTHANGUP_DEV);
@@ -3953,18 +3967,12 @@
switch (e->notify.info) {
case PRI_NOTIFY_REMOTE_HOLD:
if (!pri->discardremoteholdretrieval) {
- struct ast_frame f = { AST_FRAME_CONTROL, };
-
- f.subclass.integer = AST_CONTROL_HOLD;
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_HOLD);
}
break;
case PRI_NOTIFY_REMOTE_RETRIEVAL:
if (!pri->discardremoteholdretrieval) {
- struct ast_frame f = { AST_FRAME_CONTROL, };
-
- f.subclass.integer = AST_CONTROL_UNHOLD;
- pri_queue_frame(pri->pvts[chanpos], &f, pri);
+ pri_queue_control(pri, chanpos, AST_CONTROL_UNHOLD);
}
break;
}
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