[asterisk-commits] pbx: Create pbx sw.c for management of 'struct ast sw'. (asterisk[master])

SVN commits to the Asterisk project asterisk-commits at lists.digium.com
Thu Jul 21 15:55:11 CDT 2016


Anonymous Coward #1000019 has submitted this change and it was merged.

Change subject: pbx: Create pbx_sw.c for management of 'struct ast_sw'.
......................................................................


pbx: Create pbx_sw.c for management of 'struct ast_sw'.

This changes context switches from a linked list to a vector, makes
'struct ast_sw' opaque to pbx.c.

Although ast_walk_context_switches is maintained the procedure is no
longer efficient except for the first call (inc==NULL).  This
functionality is replaced by two new functions implemented by vector
macros.
* ast_context_switches_count (AST_VECTOR_SIZE)
* ast_context_switches_get (AST_VECTOR_GET)

As with ast_walk_context_switches callers of these functions are
expected to have locked contexts.  Only a few places in Asterisk walked
the switches, they have been converted to use the new functions.

Change-Id: I08deb016df22eee8288eb03de62593e45a1f0998
---
M include/asterisk/pbx.h
M main/pbx.c
M main/pbx_private.h
A main/pbx_sw.c
M pbx/pbx_config.c
M res/ael/pval.c
M utils/conf2ael.c
M utils/extconf.c
8 files changed, 235 insertions(+), 114 deletions(-)

Approvals:
  Mark Michelson: Looks good to me, approved
  George Joseph: Looks good to me, but someone else must approve
  Anonymous Coward #1000019: Verified



diff --git a/include/asterisk/pbx.h b/include/asterisk/pbx.h
index 67cdccf..d44a245 100644
--- a/include/asterisk/pbx.h
+++ b/include/asterisk/pbx.h
@@ -1229,9 +1229,9 @@
 struct ast_context *ast_get_extension_context(struct ast_exten *exten);
 const char *ast_get_include_name(const struct ast_include *include);
 const char *ast_get_ignorepat_name(const struct ast_ignorepat *ip);
-const char *ast_get_switch_name(struct ast_sw *sw);
-const char *ast_get_switch_data(struct ast_sw *sw);
-int ast_get_switch_eval(struct ast_sw *sw);
+const char *ast_get_switch_name(const struct ast_sw *sw);
+const char *ast_get_switch_data(const struct ast_sw *sw);
+int ast_get_switch_eval(const struct ast_sw *sw);
 
 /*! @} */
 
@@ -1251,7 +1251,7 @@
 const char *ast_get_extension_registrar(struct ast_exten *e);
 const char *ast_get_include_registrar(const struct ast_include *i);
 const char *ast_get_ignorepat_registrar(const struct ast_ignorepat *ip);
-const char *ast_get_switch_registrar(struct ast_sw *sw);
+const char *ast_get_switch_registrar(const struct ast_sw *sw);
 /*! @} */
 
 /*! @name Walking functions ... */
@@ -1265,7 +1265,8 @@
 	const struct ast_include *inc);
 const struct ast_ignorepat *ast_walk_context_ignorepats(const struct ast_context *con,
 	const struct ast_ignorepat *ip);
-struct ast_sw *ast_walk_context_switches(struct ast_context *con, struct ast_sw *sw);
+const struct ast_sw *ast_walk_context_switches(const struct ast_context *con,
+	const struct ast_sw *sw);
 /*! @} */
 
 /*! @name Iterator functions ... */
@@ -1274,6 +1275,8 @@
 const struct ast_include *ast_context_includes_get(const struct ast_context *con, int idx);
 int ast_context_ignorepats_count(const struct ast_context *con);
 const struct ast_ignorepat *ast_context_ignorepats_get(const struct ast_context *con, int idx);
+int ast_context_switches_count(const struct ast_context *con);
+const struct ast_sw *ast_context_switches_get(const struct ast_context *con, int idx);
 /*! @} */
 
 /*!
diff --git a/main/pbx.c b/main/pbx.c
index eb395eb..f9fad03 100644
--- a/main/pbx.c
+++ b/main/pbx.c
@@ -255,16 +255,6 @@
 	char stuff[0];
 };
 
-/*! \brief ast_sw: Switch statement in extensions.conf */
-struct ast_sw {
-	char *name;
-	const char *registrar;			/*!< Registrar */
-	char *data;				/*!< Data load */
-	int eval;
-	AST_LIST_ENTRY(ast_sw) list;
-	char stuff[0];
-};
-
 /*! \brief match_char: forms a syntax tree for quick matching of extension patterns */
 struct match_char
 {
@@ -297,10 +287,10 @@
 	struct ast_context *next;		/*!< Link them together */
 	struct ast_includes includes;		/*!< Include other contexts */
 	struct ast_ignorepats ignorepats;	/*!< Patterns for which to continue playing dialtone */
+	struct ast_sws alts;			/*!< Alternative switches */
 	char *registrar;			/*!< Registrar -- make sure you malloc this, as the registrar may have to survive module unloads */
 	int refcount;                   /*!< each module that would have created this context should inc/dec this as appropriate */
 	int autohints;                  /*!< Whether autohints support is enabled or not */
-	AST_LIST_HEAD_NOLOCK(, ast_sw) alts;	/*!< Alternative switches */
 	ast_mutex_t macrolock;			/*!< A lock to implement "exclusive" macros - held whilst a call is executing in the macro */
 	char name[0];				/*!< Name of the context */
 };
@@ -2375,10 +2365,10 @@
 	struct ast_context *next;
 	struct ast_includes includes;
 	struct ast_ignorepats ignorepats;
+	struct ast_sws alts;
 	const char *registrar;
 	int refcount;
 	int autohints;
-	AST_LIST_HEAD_NOLOCK(, ast_sw) alts;
 	ast_mutex_t macrolock;
 	char name[256];
 };
@@ -2433,7 +2423,6 @@
 	int x, res;
 	struct ast_context *tmp = NULL;
 	struct ast_exten *e = NULL, *eroot = NULL;
-	struct ast_sw *sw = NULL;
 	struct ast_exten pattern = {NULL, };
 	struct scoreboard score = {0, };
 	struct ast_str *tmpdata = NULL;
@@ -2657,23 +2646,28 @@
 	}
 
 	/* Check alternative switches */
-	AST_LIST_TRAVERSE(&tmp->alts, sw, list) {
-		struct ast_switch *asw = pbx_findswitch(sw->name);
+	for (idx = 0; idx < ast_context_switches_count(tmp); idx++) {
+		const struct ast_sw *sw = ast_context_switches_get(tmp, idx);
+		struct ast_switch *asw = pbx_findswitch(ast_get_switch_name(sw));
 		ast_switch_f *aswf = NULL;
-		char *datap;
+		const char *datap;
 
 		if (!asw) {
-			ast_log(LOG_WARNING, "No such switch '%s'\n", sw->name);
+			ast_log(LOG_WARNING, "No such switch '%s'\n", ast_get_switch_name(sw));
 			continue;
 		}
 
 		/* Substitute variables now */
-		if (sw->eval) {
+		if (ast_get_switch_eval(sw)) {
 			if (!(tmpdata = ast_str_thread_get(&switch_data, 512))) {
 				ast_log(LOG_WARNING, "Can't evaluate switch?!\n");
 				continue;
 			}
-			pbx_substitute_variables_helper(chan, sw->data, ast_str_buffer(tmpdata), ast_str_size(tmpdata));
+			pbx_substitute_variables_helper(chan, ast_get_switch_data(sw),
+				ast_str_buffer(tmpdata), ast_str_size(tmpdata));
+			datap = ast_str_buffer(tmpdata);
+		} else {
+			datap = ast_get_switch_data(sw);
 		}
 
 		/* equivalent of extension_match_core() at the switch level */
@@ -2683,7 +2677,6 @@
 			aswf = asw->matchmore;
 		else /* action == E_MATCH */
 			aswf = asw->exists;
-		datap = sw->eval ? ast_str_buffer(tmpdata) : sw->data;
 		if (!aswf)
 			res = 0;
 		else {
@@ -4819,24 +4812,29 @@
  */
 int ast_context_remove_switch2(struct ast_context *con, const char *sw, const char *data, const char *registrar)
 {
-	struct ast_sw *i;
+	int idx;
 	int ret = -1;
 
 	ast_wrlock_context(con);
 
 	/* walk switches */
-	AST_LIST_TRAVERSE_SAFE_BEGIN(&con->alts, i, list) {
-		if (!strcmp(i->name, sw) && !strcmp(i->data, data) &&
-			(!registrar || !strcmp(i->registrar, registrar))) {
+	for (idx = 0; idx < ast_context_switches_count(con); idx++) {
+		struct ast_sw *i = AST_VECTOR_GET(&con->alts, idx);
+
+		if (!strcmp(ast_get_switch_name(i), sw) &&
+			!strcmp(ast_get_switch_data(i), data) &&
+			(!registrar || !strcmp(ast_get_switch_registrar(i), registrar))) {
+
 			/* found, remove from list */
 			ast_verb(3, "Removing switch '%s' from context '%s; registrar=%s'\n", sw, ast_get_context_name(con), registrar);
-			AST_LIST_REMOVE_CURRENT(list);
-			ast_free(i); /* free switch and return */
+			AST_VECTOR_REMOVE_ORDERED(&con->alts, idx);
+
+			/* free switch and return */
+			sw_free(i);
 			ret = 0;
 			break;
 		}
 	}
-	AST_LIST_TRAVERSE_SAFE_END;
 
 	ast_unlock_context(con);
 
@@ -5517,8 +5515,9 @@
 			}
 		}
 		if (!rinclude) {
-			struct ast_sw *sw = NULL;
-			while ( (sw = ast_walk_context_switches(c, sw)) ) {
+			for (idx = 0; idx < ast_context_switches_count(c); idx++) {
+				const struct ast_sw *sw = ast_context_switches_get(c, idx);
+
 				snprintf(buf, sizeof(buf), "'%s/%s'",
 					ast_get_switch_name(sw),
 					ast_get_switch_data(sw));
@@ -5836,8 +5835,9 @@
 			}
 		}
 		if (!rinclude) {
-			struct ast_sw *sw = NULL;
-			while ( (sw = ast_walk_context_switches(c, sw)) ) {
+			for (idx = 0; idx < ast_context_switches_count(c); idx++) {
+				const struct ast_sw *sw = ast_context_switches_get(c, idx);
+
 				if (!dpc->total_items++)
 					manager_dpsendack(s, m);
 				astman_append(s, "Event: ListDialplan\r\n%s", actionidtext);
@@ -6087,6 +6087,7 @@
 		tmp->registrar = ast_strdup(registrar);
 		AST_VECTOR_INIT(&tmp->includes, 0);
 		AST_VECTOR_INIT(&tmp->ignorepats, 0);
+		AST_VECTOR_INIT(&tmp->alts, 0);
 		tmp->refcount = 1;
 	} else {
 		ast_log(LOG_ERROR, "Danger! We failed to allocate a context for %s!\n", name);
@@ -6138,7 +6139,6 @@
 static void context_merge_incls_swits_igps_other_registrars(struct ast_context *new, struct ast_context *old, const char *registrar)
 {
 	int idx;
-	struct ast_sw *sw;
 
 	ast_verb(3, "merging incls/swits/igpats from old(%s) to new(%s) context, registrar = %s\n", ast_get_context_name(old), ast_get_context_name(new), registrar);
 	/* copy in the includes, switches, and ignorepats */
@@ -6153,9 +6153,12 @@
 	}
 
 	/* walk through switches */
-	for (sw = NULL; (sw = ast_walk_context_switches(old, sw)) ; ) {
-		if (strcmp(ast_get_switch_registrar(sw), registrar) == 0)
+	for (idx = 0; idx < ast_context_switches_count(old); idx++) {
+		const struct ast_sw *sw = ast_context_switches_get(old, idx);
+
+		if (!strcmp(ast_get_switch_registrar(sw), registrar)) {
 			continue; /* not mine */
+		}
 		ast_context_add_switch2(new, ast_get_switch_name(sw), ast_get_switch_data(sw), ast_get_switch_eval(sw), ast_get_switch_registrar(sw));
 	}
 
@@ -6622,43 +6625,24 @@
 int ast_context_add_switch2(struct ast_context *con, const char *value,
 	const char *data, int eval, const char *registrar)
 {
+	int idx;
 	struct ast_sw *new_sw;
-	struct ast_sw *i;
-	int length;
-	char *p;
-
-	length = sizeof(struct ast_sw);
-	length += strlen(value) + 1;
-	if (data)
-		length += strlen(data);
-	length++;
 
 	/* allocate new sw structure ... */
-	if (!(new_sw = ast_calloc(1, length)))
+	if (!(new_sw = sw_alloc(value, data, eval, registrar))) {
 		return -1;
-	/* ... fill in this structure ... */
-	p = new_sw->stuff;
-	new_sw->name = p;
-	strcpy(new_sw->name, value);
-	p += strlen(value) + 1;
-	new_sw->data = p;
-	if (data) {
-		strcpy(new_sw->data, data);
-		p += strlen(data) + 1;
-	} else {
-		strcpy(new_sw->data, "");
-		p++;
 	}
-	new_sw->eval	  = eval;
-	new_sw->registrar = registrar;
 
 	/* ... try to lock this context ... */
 	ast_wrlock_context(con);
 
 	/* ... go to last sw and check if context is already swd too... */
-	AST_LIST_TRAVERSE(&con->alts, i, list) {
-		if (!strcasecmp(i->name, new_sw->name) && !strcasecmp(i->data, new_sw->data)) {
-			ast_free(new_sw);
+	for (idx = 0; idx < ast_context_switches_count(con); idx++) {
+		const struct ast_sw *i = ast_context_switches_get(con, idx);
+
+		if (!strcasecmp(ast_get_switch_name(i), ast_get_switch_name(new_sw)) &&
+			!strcasecmp(ast_get_switch_data(i), ast_get_switch_data(new_sw))) {
+			sw_free(new_sw);
 			ast_unlock_context(con);
 			errno = EEXIST;
 			return -1;
@@ -6666,9 +6650,10 @@
 	}
 
 	/* ... sw new context into context list, unlock, return */
-	AST_LIST_INSERT_TAIL(&con->alts, new_sw, list);
+	AST_VECTOR_APPEND(&con->alts, new_sw);
 
-	ast_verb(3, "Including switch '%s/%s' in context '%s'\n", new_sw->name, new_sw->data, ast_get_context_name(con));
+	ast_verb(3, "Including switch '%s/%s' in context '%s'\n",
+		ast_get_switch_name(new_sw), ast_get_switch_data(new_sw), ast_get_context_name(con));
 
 	ast_unlock_context(con);
 
@@ -7775,7 +7760,6 @@
 
 static void __ast_internal_context_destroy( struct ast_context *con)
 {
-	struct ast_sw *sw;
 	struct ast_exten *e, *el, *en;
 	struct ast_context *tmp = con;
 
@@ -7786,6 +7770,10 @@
 	/* Free ignorepats */
 	AST_VECTOR_CALLBACK_VOID(&tmp->ignorepats, ignorepat_free);
 	AST_VECTOR_FREE(&tmp->ignorepats);
+
+	/* Free switches */
+	AST_VECTOR_CALLBACK_VOID(&tmp->alts, sw_free);
+	AST_VECTOR_FREE(&tmp->alts);
 
 	if (tmp->registrar)
 		ast_free(tmp->registrar);
@@ -7798,8 +7786,6 @@
 	if (tmp->pattern_tree)
 		destroy_pattern_tree(tmp->pattern_tree);
 
-	while ((sw = AST_LIST_REMOVE_HEAD(&tmp->alts, list)))
-		ast_free(sw);
 	for (e = tmp->root; e;) {
 		for (en = e->peer; en;) {
 			el = en;
@@ -7846,7 +7832,6 @@
 			/* then search thru and remove any extens that match registrar. */
 			struct ast_hashtab_iter *exten_iter;
 			struct ast_hashtab_iter *prio_iter;
-			struct ast_sw *sw = NULL;
 			int idx;
 
 			/* remove any ignorepats whose registrar matches */
@@ -7868,13 +7853,14 @@
 				}
 			}
 			/* remove any switches whose registrar matches */
-			AST_LIST_TRAVERSE_SAFE_BEGIN(&tmp->alts, sw, list) {
-				if (strcmp(sw->registrar,registrar) == 0) {
-					AST_LIST_REMOVE_CURRENT(list);
-					ast_free(sw);
+			for (idx = ast_context_switches_count(tmp) - 1; idx >= 0; idx--) {
+				struct ast_sw *sw = AST_VECTOR_GET(&tmp->alts, idx);
+
+				if (!strcmp(ast_get_switch_registrar(sw), registrar)) {
+					AST_VECTOR_REMOVE_ORDERED(&tmp->alts, idx);
+					sw_free(sw);
 				}
 			}
-			AST_LIST_TRAVERSE_SAFE_END;
 
 			if (tmp->root_table) { /* it is entirely possible that the context is EMPTY */
 				exten_iter = ast_hashtab_start_traversal(tmp->root_table);
@@ -7925,7 +7911,7 @@
 			/* delete the context if it's registrar matches, is empty, has refcount of 1, */
 			/* it's not empty, if it has includes, ignorepats, or switches that are registered from
 			   another registrar. It's not empty if there are any extensions */
-			if (strcmp(tmp->registrar, registrar) == 0 && tmp->refcount < 2 && !tmp->root && !ast_context_ignorepats_count(tmp) && !ast_context_includes_count(tmp) && AST_LIST_EMPTY(&tmp->alts)) {
+			if (strcmp(tmp->registrar, registrar) == 0 && tmp->refcount < 2 && !tmp->root && !ast_context_ignorepats_count(tmp) && !ast_context_includes_count(tmp) && !ast_context_switches_count(tmp)) {
 				ast_debug(1, "delete ctx %s %s\n", tmp->name, tmp->registrar);
 				ast_hashtab_remove_this_object(contexttab, tmp);
 
@@ -8364,26 +8350,6 @@
 	return e ? e->data : NULL;
 }
 
-const char *ast_get_switch_name(struct ast_sw *sw)
-{
-	return sw ? sw->name : NULL;
-}
-
-const char *ast_get_switch_data(struct ast_sw *sw)
-{
-	return sw ? sw->data : NULL;
-}
-
-int ast_get_switch_eval(struct ast_sw *sw)
-{
-	return sw->eval;
-}
-
-const char *ast_get_switch_registrar(struct ast_sw *sw)
-{
-	return sw ? sw->registrar : NULL;
-}
-
 /*
  * Walking functions ...
  */
@@ -8401,13 +8367,43 @@
 		return exten->next;
 }
 
-struct ast_sw *ast_walk_context_switches(struct ast_context *con,
-	struct ast_sw *sw)
+const struct ast_sw *ast_walk_context_switches(const struct ast_context *con,
+	const struct ast_sw *sw)
 {
-	if (!sw)
-		return con ? AST_LIST_FIRST(&con->alts) : NULL;
-	else
-		return AST_LIST_NEXT(sw, list);
+	if (sw) {
+		int idx;
+		int next = 0;
+
+		for (idx = 0; idx < ast_context_switches_count(con); idx++) {
+			const struct ast_sw *s = ast_context_switches_get(con, idx);
+
+			if (next) {
+				return s;
+			}
+
+			if (sw == s) {
+				next = 1;
+			}
+		}
+
+		return NULL;
+	}
+
+	if (!ast_context_switches_count(con)) {
+		return NULL;
+	}
+
+	return ast_context_switches_get(con, 0);
+}
+
+int ast_context_switches_count(const struct ast_context *con)
+{
+	return AST_VECTOR_SIZE(&con->alts);
+}
+
+const struct ast_sw *ast_context_switches_get(const struct ast_context *con, int idx)
+{
+	return AST_VECTOR_GET(&con->alts, idx);
 }
 
 struct ast_exten *ast_walk_extension_priorities(struct ast_exten *exten,
diff --git a/main/pbx_private.h b/main/pbx_private.h
index 2b7d982..da1060e 100644
--- a/main/pbx_private.h
+++ b/main/pbx_private.h
@@ -49,6 +49,12 @@
 int include_valid(const struct ast_include *inc);
 const char *include_rname(const struct ast_include *inc);
 
+/*! pbx_sw.c */
+struct ast_sw;
+AST_VECTOR(ast_sws, struct ast_sw *);
+struct ast_sw *sw_alloc(const char *value, const char *data, int eval, const char *registrar);
+void sw_free(struct ast_sw *sw);
+
 /*! pbx_builtins.c functions needed by pbx.c */
 int indicate_congestion(struct ast_channel *, const char *);
 int indicate_busy(struct ast_channel *, const char *);
diff --git a/main/pbx_sw.c b/main/pbx_sw.c
new file mode 100644
index 0000000..0490ac6
--- /dev/null
+++ b/main/pbx_sw.c
@@ -0,0 +1,107 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2016, CFWare, LLC
+ *
+ * Corey Farrell <git at cfware.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Dialplan switch routines.
+ *
+ * \author Corey Farrell <git at cfware.com>
+ */
+
+/*** MODULEINFO
+	<support_level>core</support_level>
+ ***/
+
+#include "asterisk.h"
+
+ASTERISK_REGISTER_FILE()
+
+#include "asterisk/_private.h"
+#include "asterisk/pbx.h"
+#include "pbx_private.h"
+
+/*! \brief ast_sw: Switch statement in extensions.conf */
+struct ast_sw {
+	const char *name;
+	/*! Registrar */
+	const char *registrar;
+	/*! Data load */
+	const char *data;
+	int eval;
+	AST_LIST_ENTRY(ast_sw) list;
+	char stuff[0];
+};
+
+const char *ast_get_switch_name(const struct ast_sw *sw)
+{
+	return sw ? sw->name : NULL;
+}
+
+const char *ast_get_switch_data(const struct ast_sw *sw)
+{
+	return sw ? sw->data : NULL;
+}
+
+int ast_get_switch_eval(const struct ast_sw *sw)
+{
+	return sw->eval;
+}
+
+const char *ast_get_switch_registrar(const struct ast_sw *sw)
+{
+	return sw ? sw->registrar : NULL;
+}
+
+struct ast_sw *sw_alloc(const char *value, const char *data, int eval, const char *registrar)
+{
+	struct ast_sw *new_sw;
+	int length;
+	char *p;
+
+	if (!data) {
+		data = "";
+	}
+	length = sizeof(struct ast_sw);
+	length += strlen(value) + 1;
+	length += strlen(data) + 1;
+
+	/* allocate new sw structure ... */
+	if (!(new_sw = ast_calloc(1, length))) {
+		return NULL;
+	}
+
+	/* ... fill in this structure ... */
+	p = new_sw->stuff;
+	new_sw->name = p;
+	strcpy(p, value);
+
+	p += strlen(value) + 1;
+	new_sw->data = p;
+	strcpy(p, data);
+
+	new_sw->eval	  = eval;
+	new_sw->registrar = registrar;
+
+	return new_sw;
+}
+
+void sw_free(struct ast_sw *sw)
+{
+	ast_free(sw);
+}
+
diff --git a/pbx/pbx_config.c b/pbx/pbx_config.c
index cb7e03a..0da4168 100644
--- a/pbx/pbx_config.c
+++ b/pbx/pbx_config.c
@@ -928,7 +928,6 @@
 		int context_header_written = 0;
 		struct ast_exten *ext, *last_written_e = NULL;
 		int idx;
-		struct ast_sw *sw;
 
 		/* try to lock context and fireout all info */	
 		if (ast_rdlock_context(c)) { /* lock failure */
@@ -1016,7 +1015,9 @@
 		}
 
 		/* walk through switches */
-		for (sw = NULL; (sw = ast_walk_context_switches(c, sw)) ; ) {
+		for (idx = 0; idx < ast_context_switches_count(c); idx++) {
+			const struct ast_sw *sw = ast_context_switches_get(c, idx);
+
 			if (strcmp(ast_get_switch_registrar(sw), registrar) != 0)
 				continue; /* not mine */
 			PUT_CTX_HDR;
@@ -1024,8 +1025,9 @@
 				    ast_get_switch_name(sw), ast_get_switch_data(sw));
 		}
 
-		if (ast_walk_context_switches(c, NULL))
+		if (ast_context_switches_count(c)) {
 			fprintf(output, "\n");
+		}
 
 		/* fireout ignorepats ... */
 		for (idx = 0; idx < ast_context_ignorepats_count(c); idx++) {
diff --git a/res/ael/pval.c b/res/ael/pval.c
index 2941365..485f5ee 100644
--- a/res/ael/pval.c
+++ b/res/ael/pval.c
@@ -4410,7 +4410,7 @@
 {
 	struct ael_extension *exten;
 	/* Check the simple elements first */
-	if (ast_walk_context_extensions(context, NULL) || ast_context_includes_count(context) || ast_context_ignorepats_count(context) || ast_walk_context_switches(context, NULL)) {
+	if (ast_walk_context_extensions(context, NULL) || ast_context_includes_count(context) || ast_context_ignorepats_count(context) || ast_context_switches_count(context)) {
 		return 1;
 	}
 	for (exten = exten_list; exten; exten = exten->next_exten) {
diff --git a/utils/conf2ael.c b/utils/conf2ael.c
index f0cb83f..3136fe3 100644
--- a/utils/conf2ael.c
+++ b/utils/conf2ael.c
@@ -670,12 +670,6 @@
 	return NULL;
 }
 
-struct ast_sw *ast_walk_context_switches(struct ast_context *con, struct ast_sw *sw);
-struct ast_sw *ast_walk_context_switches(struct ast_context *con, struct ast_sw *sw)
-{
-	return NULL;
-}
-
 struct ast_exten *pbx_find_extension(struct ast_channel *chan,
 									 struct ast_context *bypass,
 									 struct pbx_find_info *q,
diff --git a/utils/extconf.c b/utils/extconf.c
index 0498823..8588d1a 100644
--- a/utils/extconf.c
+++ b/utils/extconf.c
@@ -4448,6 +4448,19 @@
 	return ast_walk_context_switches(con, sw);
 }
 
+int ast_context_switches_count(struct ast_context *con);
+int ast_context_switches_count(struct ast_context *con)
+{
+	int c = 0;
+	struct ast_sw *sw = NULL;
+
+	while ((sw = ast_walk_context_switches(con, sw))) {
+		c++;
+	}
+
+	return c;
+}
+
 
 static struct ast_context *ast_context_find(const char *name);
 

-- 
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Gerrit-MessageType: merged
Gerrit-Change-Id: I08deb016df22eee8288eb03de62593e45a1f0998
Gerrit-PatchSet: 2
Gerrit-Project: asterisk
Gerrit-Branch: master
Gerrit-Owner: Corey Farrell <git at cfware.com>
Gerrit-Reviewer: Anonymous Coward #1000019
Gerrit-Reviewer: Corey Farrell <git at cfware.com>
Gerrit-Reviewer: George Joseph <gjoseph at digium.com>
Gerrit-Reviewer: Mark Michelson <mmichelson at digium.com>



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