From f4943f32116dbb359b03d72b8c3d3c470c657811 Mon Sep 17 00:00:00 2001
From: Joshua Colp <jcolp@digium.com>
Date: Thu, 5 Jul 2007 14:22:58 +0000
Subject: Merged revisions 73355 via svnmerge from
 https://origsvn.digium.com/svn/asterisk/branches/1.4

................
r73355 | file | 2007-07-05 11:21:44 -0300 (Thu, 05 Jul 2007) | 10 lines

Merged revisions 73349 via svnmerge from
https://origsvn.digium.com/svn/asterisk/branches/1.2

........
r73349 | file | 2007-07-05 11:19:14 -0300 (Thu, 05 Jul 2007) | 2 lines

Tweak spy locking. (issue #9951 reported by welles)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@73359 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
 apps/app_chanspy.c |  3 ++-
 main/channel.c     | 14 ++++++--------
 2 files changed, 8 insertions(+), 9 deletions(-)

diff --git a/apps/app_chanspy.c b/apps/app_chanspy.c
index f30631450..8081fb1d8 100644
--- a/apps/app_chanspy.c
+++ b/apps/app_chanspy.c
@@ -425,9 +425,10 @@ static int channel_spy(struct ast_channel *chan, struct ast_channel *spyee, int
 	else
 		ast_deactivate_generator(chan);
 
+	csth.spy.status = CHANSPY_DONE;
+
 	/* If a channel still exists on our spy structure then we need to remove ourselves */
 	if (csth.spy.chan) {
-		csth.spy.status = CHANSPY_DONE;
 		ast_channel_lock(csth.spy.chan);
 		ast_channel_spy_remove(csth.spy.chan, &csth.spy);
 		ast_channel_unlock(csth.spy.chan);
diff --git a/main/channel.c b/main/channel.c
index 5626e34f5..a39a3ad13 100644
--- a/main/channel.c
+++ b/main/channel.c
@@ -1347,23 +1347,21 @@ static void spy_cleanup(struct ast_channel *chan)
 /* Detach a spy from it's channel */
 static void spy_detach(struct ast_channel_spy *spy, struct ast_channel *chan)
 {
-	ast_mutex_lock(&spy->lock);
-
 	/* We only need to poke them if they aren't already done */
 	if (spy->status != CHANSPY_DONE) {
+		ast_mutex_lock(&spy->lock);
 		/* Indicate to the spy to stop */
 		spy->status = CHANSPY_STOP;
 		spy->chan = NULL;
 		/* Poke the spy if needed */
 		if (ast_test_flag(spy, CHANSPY_TRIGGER_MODE) != CHANSPY_TRIGGER_NONE)
 			ast_cond_signal(&spy->trigger);
+		ast_mutex_unlock(&spy->lock);
 	}
 
 	/* Print it out while we still have a lock so the structure can't go away (if signalled above) */
 	ast_debug(1, "Spy %s removed from channel %s\n", spy->type, chan->name);
 
-	ast_mutex_unlock(&spy->lock);
-
 	return;
 }
 
@@ -1375,13 +1373,10 @@ void ast_channel_spy_stop_by_type(struct ast_channel *chan, const char *type)
 		return;
 
 	AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->spies->list, spy, list) {
-		ast_mutex_lock(&spy->lock);
 		if ((spy->type == type) && (spy->status == CHANSPY_RUNNING)) {
-			ast_mutex_unlock(&spy->lock);
 			AST_LIST_REMOVE_CURRENT(&chan->spies->list, list);
 			spy_detach(spy, chan);
-		} else
-			ast_mutex_unlock(&spy->lock);
+		}
 	}
 	AST_LIST_TRAVERSE_SAFE_END
 	spy_cleanup(chan);
@@ -1493,6 +1488,9 @@ static void queue_frame_to_spies(struct ast_channel *chan, struct ast_frame *f,
 		struct ast_channel_spy_queue *queue;
 		struct ast_frame *duped_fr;
 
+		if (spy->status != CHANSPY_RUNNING)
+			continue;
+
 		ast_mutex_lock(&spy->lock);
 
 		queue = (dir == SPY_READ) ? &spy->read_queue : &spy->write_queue;
-- 
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