don't use locks when reading usecounts (reading only, not writing)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5994 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_agent.c

@@ -2225,11 +2225,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_alsa.c

@@ -1102,11 +1102,7 @@ char *description()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_features.c

@@ -570,11 +570,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_h323.c

@@ -2420,11 +2420,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *description()

channels/chan_iax2.c

@@ -9327,11 +9327,7 @@ char *description()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_local.c

@@ -585,11 +585,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_mgcp.c

@@ -4383,11 +4383,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_modem.c

@@ -1085,11 +1085,7 @@ int load_module()
 
 int usecount(void)
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *description()

channels/chan_modem_aopen.c

@@ -465,11 +465,7 @@ static struct ast_modem_driver aopen_driver =
 
 int usecount(void)
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 int load_module(void)

channels/chan_modem_bestdata.c

@@ -577,11 +577,7 @@ static struct ast_modem_driver bestdata_driver =
 
 int usecount(void)
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 int load_module(void)

channels/chan_modem_i4l.c

@@ -706,11 +706,7 @@ static struct ast_modem_driver i4l_driver =
 
 int usecount(void)
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 int load_module(void)

channels/chan_nbs.c

@@ -296,11 +296,7 @@ int load_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *description()

channels/chan_oss.c

@@ -1111,11 +1111,7 @@ char *description()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_phone.c

@@ -1392,11 +1392,7 @@ int load_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *description()

channels/chan_sip.c

@@ -11598,13 +11598,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_skinny.c

@@ -3392,11 +3392,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *key()

channels/chan_vpb.c

@@ -2962,11 +2962,7 @@ int unload_module()
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *description()

channels/chan_zap.c

@@ -10645,11 +10645,7 @@ int reload(void)
 
 int usecount()
 {
-	int res;
-	ast_mutex_lock(&usecnt_lock);
-	res = usecnt;
-	ast_mutex_unlock(&usecnt_lock);
-	return res;
+	return usecnt;
 }
 
 char *description()

include/asterisk/module.h

@@ -210,9 +210,7 @@ void ast_unregister_atexit(void (*func)(void));
 }
 
 #define STANDARD_USECOUNT(res) { \
-	ast_mutex_lock(&localuser_lock); \
 	res = localusecnt; \
-	ast_mutex_unlock(&localuser_lock); \
 }