Let's make application/function/hint lists read/write lists... just for kicks
authorJoshua Colp <jcolp@digium.com>
Thu, 2 Nov 2006 21:40:53 +0000 (21:40 +0000)
committerJoshua Colp <jcolp@digium.com>
Thu, 2 Nov 2006 21:40:53 +0000 (21:40 +0000)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@47037 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/pbx.h
main/pbx.c

index c558289..fbaef54 100644 (file)
@@ -73,7 +73,7 @@ struct ast_custom_function {
        const char *syntax;             /*!< Syntax description */
        int (*read)(struct ast_channel *, char *, char *, char *, size_t);      /*!< Read function, if read is supported */
        int (*write)(struct ast_channel *, char *, char *, const char *);       /*!< Write function, if write is supported */
-       AST_LIST_ENTRY(ast_custom_function) acflist;
+       AST_RWLIST_ENTRY(ast_custom_function) acflist;
 };
 
 /*! \brief All switch functions have the same interface, so define a type for them */
index 7ea9596..b13c6f0 100644 (file)
@@ -177,7 +177,7 @@ struct ast_app {
        int (*execute)(struct ast_channel *chan, void *data);
        const char *synopsis;                   /*!< Synopsis text for 'show applications' */
        const char *description;                /*!< Description (help text) for 'show application &lt;name&gt;' */
-       AST_LIST_ENTRY(ast_app) list;           /*!< Next app in list */
+       AST_RWLIST_ENTRY(ast_app) list;         /*!< Next app in list */
        struct module *module;                  /*!< Module this app belongs to */
        char name[0];                           /*!< Name of the application */
 };
@@ -198,7 +198,7 @@ struct ast_hint {
        struct ast_exten *exten;        /*!< Extension */
        int laststate;                  /*!< Last known state */
        struct ast_state_cb *callbacks; /*!< Callback list for this extension */
-       AST_LIST_ENTRY(ast_hint) list;  /*!< Pointer to next hint in list */
+       AST_RWLIST_ENTRY(ast_hint) list;/*!< Pointer to next hint in list */
 };
 
 static const struct cfextension_states {
@@ -246,7 +246,7 @@ static int autofallthrough = 1;
 AST_MUTEX_DEFINE_STATIC(maxcalllock);
 static int countcalls = 0;
 
-static AST_LIST_HEAD_STATIC(acf_root, ast_custom_function);
+static AST_RWLIST_HEAD_STATIC(acf_root, ast_custom_function);
 
 /*! \brief Declaration of builtin applications */
 static struct pbx_builtin {
@@ -461,7 +461,7 @@ static struct pbx_builtin {
 static struct ast_context *contexts = NULL;
 AST_MUTEX_DEFINE_STATIC(conlock);              /*!< Lock for the ast_context list */
 
-static AST_LIST_HEAD_STATIC(apps, ast_app);
+static AST_RWLIST_HEAD_STATIC(apps, ast_app);
 
 static AST_LIST_HEAD_STATIC(switches, ast_switch);
 
@@ -472,7 +472,7 @@ static int stateid = 1;
    function will take the locks in conlock/hints order, so any other
    paths that require both locks must also take them in that order.
 */
-static AST_LIST_HEAD_STATIC(hints, ast_hint);
+static AST_RWLIST_HEAD_STATIC(hints, ast_hint);
 struct ast_state_cb *statecbs = NULL;
 
 /*
@@ -520,12 +520,12 @@ struct ast_app *pbx_findapp(const char *app)
 {
        struct ast_app *tmp;
 
-       AST_LIST_LOCK(&apps);
-       AST_LIST_TRAVERSE(&apps, tmp, list) {
+       AST_RWLIST_RDLOCK(&apps);
+       AST_RWLIST_TRAVERSE(&apps, tmp, list) {
                if (!strcasecmp(tmp->name, app))
                        break;
        }
-       AST_LIST_UNLOCK(&apps);
+       AST_RWLIST_UNLOCK(&apps);
 
        return tmp;
 }
@@ -1220,14 +1220,14 @@ static int handle_show_functions(int fd, int argc, char *argv[])
 
        ast_cli(fd, "%s Custom Functions:\n--------------------------------------------------------------------------------\n", like ? "Matching" : "Installed");
 
-       AST_LIST_LOCK(&acf_root);
-       AST_LIST_TRAVERSE(&acf_root, acf, acflist) {
+       AST_RWLIST_RDLOCK(&acf_root);
+       AST_RWLIST_TRAVERSE(&acf_root, acf, acflist) {
                if (!like || strstr(acf->name, argv[4])) {
                        count_acf++;
                        ast_cli(fd, "%-20.20s  %-35.35s  %s\n", acf->name, acf->syntax, acf->synopsis);
                }
        }
-       AST_LIST_UNLOCK(&acf_root);
+       AST_RWLIST_UNLOCK(&acf_root);
 
        ast_cli(fd, "%d %scustom functions installed.\n", count_acf, like ? "matching " : "");
 
@@ -1298,14 +1298,14 @@ static char *complete_show_function(const char *line, const char *word, int pos,
        int wordlen = strlen(word);
 
        /* case-insensitive for convenience in this 'complete' function */
-       AST_LIST_LOCK(&acf_root);
-       AST_LIST_TRAVERSE(&acf_root, acf, acflist) {
+       AST_RWLIST_RDLOCK(&acf_root);
+       AST_RWLIST_TRAVERSE(&acf_root, acf, acflist) {
                if (!strncasecmp(word, acf->name, wordlen) && ++which > state) {
                        ret = strdup(acf->name);
                        break;
                }
        }
-       AST_LIST_UNLOCK(&acf_root);
+       AST_RWLIST_UNLOCK(&acf_root);
 
        return ret;
 }
@@ -1314,12 +1314,12 @@ struct ast_custom_function *ast_custom_function_find(const char *name)
 {
        struct ast_custom_function *acf = NULL;
 
-       AST_LIST_LOCK(&acf_root);
-       AST_LIST_TRAVERSE(&acf_root, acf, acflist) {
+       AST_RWLIST_RDLOCK(&acf_root);
+       AST_RWLIST_TRAVERSE(&acf_root, acf, acflist) {
                if (!strcmp(name, acf->name))
                        break;
        }
-       AST_LIST_UNLOCK(&acf_root);
+       AST_RWLIST_UNLOCK(&acf_root);
 
        return acf;
 }
@@ -1331,17 +1331,17 @@ int ast_custom_function_unregister(struct ast_custom_function *acf)
        if (!acf)
                return -1;
 
-       AST_LIST_LOCK(&acf_root);
-       AST_LIST_TRAVERSE_SAFE_BEGIN(&acf_root, cur, acflist) {
+       AST_RWLIST_WRLOCK(&acf_root);
+       AST_RWLIST_TRAVERSE_SAFE_BEGIN(&acf_root, cur, acflist) {
                if (cur == acf) {
-                       AST_LIST_REMOVE_CURRENT(&acf_root, acflist);
+                       AST_RWLIST_REMOVE_CURRENT(&acf_root, acflist);
                        if (option_verbose > 1)
                                ast_verbose(VERBOSE_PREFIX_2 "Unregistered custom function %s\n", acf->name);
                        break;
                }
        }
-       AST_LIST_TRAVERSE_SAFE_END
-       AST_LIST_UNLOCK(&acf_root);
+       AST_RWLIST_TRAVERSE_SAFE_END
+       AST_RWLIST_UNLOCK(&acf_root);
 
        return acf ? 0 : -1;
 }
@@ -1353,26 +1353,28 @@ int ast_custom_function_register(struct ast_custom_function *acf)
        if (!acf)
                return -1;
 
-       AST_LIST_LOCK(&acf_root);
+       AST_RWLIST_WRLOCK(&acf_root);
 
-       if (ast_custom_function_find(acf->name)) {
-               ast_log(LOG_ERROR, "Function %s already registered.\n", acf->name);
-               AST_LIST_UNLOCK(&acf_root);
-               return -1;
+       AST_RWLIST_TRAVERSE(&acf_root, cur, acflist) {
+               if (!strcmp(acf->name, cur->name)) {
+                       ast_log(LOG_ERROR, "Function %s already registered.\n", acf->name);
+                       AST_RWLIST_UNLOCK(&acf_root);
+                       return -1;
+               }
        }
 
        /* Store in alphabetical order */
-       AST_LIST_TRAVERSE_SAFE_BEGIN(&acf_root, cur, acflist) {
+       AST_RWLIST_TRAVERSE_SAFE_BEGIN(&acf_root, cur, acflist) {
                if (strcasecmp(acf->name, cur->name) < 0) {
-                       AST_LIST_INSERT_BEFORE_CURRENT(&acf_root, acf, acflist);
+                       AST_RWLIST_INSERT_BEFORE_CURRENT(&acf_root, acf, acflist);
                        break;
                }
        }
-       AST_LIST_TRAVERSE_SAFE_END
+       AST_RWLIST_TRAVERSE_SAFE_END
        if (!cur)
-               AST_LIST_INSERT_TAIL(&acf_root, acf, acflist);
+               AST_RWLIST_INSERT_TAIL(&acf_root, acf, acflist);
 
-       AST_LIST_UNLOCK(&acf_root);
+       AST_RWLIST_UNLOCK(&acf_root);
 
        if (option_verbose > 1)
                ast_verbose(VERBOSE_PREFIX_2 "Registered custom function %s\n", acf->name);
@@ -1871,9 +1873,9 @@ void ast_hint_state_changed(const char *device)
 {
        struct ast_hint *hint;
 
-       AST_LIST_LOCK(&hints);
+       AST_RWLIST_RDLOCK(&hints);
 
-       AST_LIST_TRAVERSE(&hints, hint, list) {
+       AST_RWLIST_TRAVERSE(&hints, hint, list) {
                struct ast_state_cb *cblist;
                char buf[AST_MAX_EXTENSION];
                char *parse = buf;
@@ -1907,7 +1909,7 @@ void ast_hint_state_changed(const char *device)
                hint->laststate = state;        /* record we saw the change */
        }
 
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_UNLOCK(&hints);
 }
 
 /*! \brief  ast_extension_state_add: Add watcher for extension states */
@@ -1920,19 +1922,19 @@ int ast_extension_state_add(const char *context, const char *exten,
 
        /* If there's no context and extension:  add callback to statecbs list */
        if (!context && !exten) {
-               AST_LIST_LOCK(&hints);
+               AST_RWLIST_WRLOCK(&hints);
 
                for (cblist = statecbs; cblist; cblist = cblist->next) {
                        if (cblist->callback == callback) {
                                cblist->data = data;
-                               AST_LIST_UNLOCK(&hints);
+                               AST_RWLIST_UNLOCK(&hints);
                                return 0;
                        }
                }
 
                /* Now insert the callback */
                if (!(cblist = ast_calloc(1, sizeof(*cblist)))) {
-                       AST_LIST_UNLOCK(&hints);
+                       AST_RWLIST_UNLOCK(&hints);
                        return -1;
                }
                cblist->id = 0;
@@ -1942,7 +1944,7 @@ int ast_extension_state_add(const char *context, const char *exten,
                cblist->next = statecbs;
                statecbs = cblist;
 
-               AST_LIST_UNLOCK(&hints);
+               AST_RWLIST_UNLOCK(&hints);
                return 0;
        }
 
@@ -1956,22 +1958,22 @@ int ast_extension_state_add(const char *context, const char *exten,
        }
 
        /* Find the hint in the list of hints */
-       AST_LIST_LOCK(&hints);
+       AST_RWLIST_WRLOCK(&hints);
 
-       AST_LIST_TRAVERSE(&hints, hint, list) {
+       AST_RWLIST_TRAVERSE(&hints, hint, list) {
                if (hint->exten == e)
                        break;
        }
 
        if (!hint) {
                /* We have no hint, sorry */
-               AST_LIST_UNLOCK(&hints);
+               AST_RWLIST_UNLOCK(&hints);
                return -1;
        }
 
        /* Now insert the callback in the callback list  */
        if (!(cblist = ast_calloc(1, sizeof(*cblist)))) {
-               AST_LIST_UNLOCK(&hints);
+               AST_RWLIST_UNLOCK(&hints);
                return -1;
        }
        cblist->id = stateid++;         /* Unique ID for this callback */
@@ -1981,7 +1983,7 @@ int ast_extension_state_add(const char *context, const char *exten,
        cblist->next = hint->callbacks;
        hint->callbacks = cblist;
 
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_UNLOCK(&hints);
        return cblist->id;
 }
 
@@ -1994,7 +1996,7 @@ int ast_extension_state_del(int id, ast_state_cb_type callback)
        if (!id && !callback)
                return -1;
 
-       AST_LIST_LOCK(&hints);
+       AST_RWLIST_WRLOCK(&hints);
 
        if (!id) {      /* id == 0 is a callback without extension */
                for (p_cur = &statecbs; *p_cur; p_cur = &(*p_cur)->next) {
@@ -2003,7 +2005,7 @@ int ast_extension_state_del(int id, ast_state_cb_type callback)
                }
        } else { /* callback with extension, find the callback based on ID */
                struct ast_hint *hint;
-               AST_LIST_TRAVERSE(&hints, hint, list) {
+               AST_RWLIST_TRAVERSE(&hints, hint, list) {
                        for (p_cur = &hint->callbacks; *p_cur; p_cur = &(*p_cur)->next) {
                                if ((*p_cur)->id == id)
                                        break;
@@ -2018,7 +2020,7 @@ int ast_extension_state_del(int id, ast_state_cb_type callback)
                free(cur);
                ret = 0;
        }
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_UNLOCK(&hints);
        return ret;
 }
 
@@ -2030,12 +2032,12 @@ static int ast_add_hint(struct ast_exten *e)
        if (!e)
                return -1;
 
-       AST_LIST_LOCK(&hints);
+       AST_RWLIST_WRLOCK(&hints);
 
        /* Search if hint exists, do nothing */
-       AST_LIST_TRAVERSE(&hints, hint, list) {
+       AST_RWLIST_TRAVERSE(&hints, hint, list) {
                if (hint->exten == e) {
-                       AST_LIST_UNLOCK(&hints);
+                       AST_RWLIST_UNLOCK(&hints);
                        if (option_debug > 1)
                                ast_log(LOG_DEBUG, "HINTS: Not re-adding existing hint %s: %s\n", ast_get_extension_name(e), ast_get_extension_app(e));
                        return -1;
@@ -2046,15 +2048,15 @@ static int ast_add_hint(struct ast_exten *e)
                ast_log(LOG_DEBUG, "HINTS: Adding hint %s: %s\n", ast_get_extension_name(e), ast_get_extension_app(e));
 
        if (!(hint = ast_calloc(1, sizeof(*hint)))) {
-               AST_LIST_UNLOCK(&hints);
+               AST_RWLIST_UNLOCK(&hints);
                return -1;
        }
        /* Initialize and insert new item at the top */
        hint->exten = e;
        hint->laststate = ast_extension_state2(e);
-       AST_LIST_INSERT_HEAD(&hints, hint, list);
+       AST_RWLIST_INSERT_HEAD(&hints, hint, list);
 
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_UNLOCK(&hints);
        return 0;
 }
 
@@ -2064,15 +2066,15 @@ static int ast_change_hint(struct ast_exten *oe, struct ast_exten *ne)
        struct ast_hint *hint;
        int res = -1;
 
-       AST_LIST_LOCK(&hints);
-       AST_LIST_TRAVERSE(&hints, hint, list) {
+       AST_RWLIST_WRLOCK(&hints);
+       AST_RWLIST_TRAVERSE(&hints, hint, list) {
                if (hint->exten == oe) {
                        hint->exten = ne;
                        res = 0;
                        break;
                }
        }
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_UNLOCK(&hints);
 
        return res;
 }
@@ -2088,8 +2090,8 @@ static int ast_remove_hint(struct ast_exten *e)
        if (!e)
                return -1;
 
-       AST_LIST_LOCK(&hints);
-       AST_LIST_TRAVERSE_SAFE_BEGIN(&hints, hint, list) {
+       AST_RWLIST_WRLOCK(&hints);
+       AST_RWLIST_TRAVERSE_SAFE_BEGIN(&hints, hint, list) {
                if (hint->exten == e) {
                        cbprev = NULL;
                        cblist = hint->callbacks;
@@ -2101,14 +2103,14 @@ static int ast_remove_hint(struct ast_exten *e)
                                free(cbprev);
                        }
                        hint->callbacks = NULL;
-                       AST_LIST_REMOVE_CURRENT(&hints, list);
+                       AST_RWLIST_REMOVE_CURRENT(&hints, list);
                        free(hint);
                        res = 0;
                        break;
                }
        }
-       AST_LIST_TRAVERSE_SAFE_END
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_TRAVERSE_SAFE_END
+       AST_RWLIST_UNLOCK(&hints);
 
        return res;
 }
@@ -2812,11 +2814,11 @@ int ast_register_application(const char *app, int (*execute)(struct ast_channel
        char tmps[80];
        int length;
 
-       AST_LIST_LOCK(&apps);
-       AST_LIST_TRAVERSE(&apps, tmp, list) {
+       AST_RWLIST_WRLOCK(&apps);
+       AST_RWLIST_TRAVERSE(&apps, tmp, list) {
                if (!strcasecmp(app, tmp->name)) {
                        ast_log(LOG_WARNING, "Already have an application '%s'\n", app);
-                       AST_LIST_UNLOCK(&apps);
+                       AST_RWLIST_UNLOCK(&apps);
                        return -1;
                }
        }
@@ -2824,7 +2826,7 @@ int ast_register_application(const char *app, int (*execute)(struct ast_channel
        length = sizeof(*tmp) + strlen(app) + 1;
 
        if (!(tmp = ast_calloc(1, length))) {
-               AST_LIST_UNLOCK(&apps);
+               AST_RWLIST_UNLOCK(&apps);
                return -1;
        }
 
@@ -2834,20 +2836,20 @@ int ast_register_application(const char *app, int (*execute)(struct ast_channel
        tmp->description = description;
 
        /* Store in alphabetical order */
-       AST_LIST_TRAVERSE_SAFE_BEGIN(&apps, cur, list) {
+       AST_RWLIST_TRAVERSE_SAFE_BEGIN(&apps, cur, list) {
                if (strcasecmp(tmp->name, cur->name) < 0) {
-                       AST_LIST_INSERT_BEFORE_CURRENT(&apps, tmp, list);
+                       AST_RWLIST_INSERT_BEFORE_CURRENT(&apps, tmp, list);
                        break;
                }
        }
-       AST_LIST_TRAVERSE_SAFE_END
+       AST_RWLIST_TRAVERSE_SAFE_END
        if (!cur)
-               AST_LIST_INSERT_TAIL(&apps, tmp, list);
+               AST_RWLIST_INSERT_TAIL(&apps, tmp, list);
 
        if (option_verbose > 1)
                ast_verbose( VERBOSE_PREFIX_2 "Registered application '%s'\n", term_color(tmps, tmp->name, COLOR_BRCYAN, 0, sizeof(tmps)));
 
-       AST_LIST_UNLOCK(&apps);
+       AST_RWLIST_UNLOCK(&apps);
 
        return 0;
 }
@@ -2940,14 +2942,14 @@ static char *complete_show_application(const char *line, const char *word, int p
        int wordlen = strlen(word);
 
        /* return the n-th [partial] matching entry */
-       AST_LIST_LOCK(&apps);
-       AST_LIST_TRAVERSE(&apps, a, list) {
+       AST_RWLIST_RDLOCK(&apps);
+       AST_RWLIST_TRAVERSE(&apps, a, list) {
                if (!strncasecmp(word, a->name, wordlen) && ++which > state) {
                        ret = strdup(a->name);
                        break;
                }
        }
-       AST_LIST_UNLOCK(&apps);
+       AST_RWLIST_UNLOCK(&apps);
 
        return ret;
 }
@@ -2961,8 +2963,8 @@ static int handle_show_application(int fd, int argc, char *argv[])
                return RESULT_SHOWUSAGE;
 
        /* ... go through all applications ... */
-       AST_LIST_LOCK(&apps);
-       AST_LIST_TRAVERSE(&apps, a, list) {
+       AST_RWLIST_RDLOCK(&apps);
+       AST_RWLIST_TRAVERSE(&apps, a, list) {
                /* ... compare this application name with all arguments given
                 * to 'show application' command ... */
                for (app = 3; app < argc; app++) {
@@ -3011,7 +3013,7 @@ static int handle_show_application(int fd, int argc, char *argv[])
                        }
                }
        }
-       AST_LIST_UNLOCK(&apps);
+       AST_RWLIST_UNLOCK(&apps);
 
        /* we found at least one app? no? */
        if (no_registered_app) {
@@ -3030,14 +3032,15 @@ static int handle_show_hints(int fd, int argc, char *argv[])
        int watchers;
        struct ast_state_cb *watcher;
 
-       if (AST_LIST_EMPTY(&hints)) {
+       AST_RWLIST_RDLOCK(&hints);
+       if (AST_RWLIST_EMPTY(&hints)) {
                ast_cli(fd, "There are no registered dialplan hints\n");
+               AST_RWLIST_UNLOCK(&hints);
                return RESULT_SUCCESS;
        }
        /* ... we have hints ... */
        ast_cli(fd, "\n    -= Registered Asterisk Dial Plan Hints =-\n");
-       AST_LIST_LOCK(&hints);
-       AST_LIST_TRAVERSE(&hints, hint, list) {
+       AST_RWLIST_TRAVERSE(&hints, hint, list) {
                watchers = 0;
                for (watcher = hint->callbacks; watcher; watcher = watcher->next)
                        watchers++;
@@ -3050,7 +3053,7 @@ static int handle_show_hints(int fd, int argc, char *argv[])
        }
        ast_cli(fd, "----------------\n");
        ast_cli(fd, "- %d hints registered\n", num);
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_UNLOCK(&hints);
        return RESULT_SUCCESS;
 }
 
@@ -3083,11 +3086,11 @@ static int handle_show_applications(int fd, int argc, char *argv[])
        int total_match = 0;    /* Number of matches in like clause */
        int total_apps = 0;     /* Number of apps registered */
 
-       AST_LIST_LOCK(&apps);
+       AST_RWLIST_RDLOCK(&apps);
 
-       if (AST_LIST_EMPTY(&apps)) {
+       if (AST_RWLIST_EMPTY(&apps)) {
                ast_cli(fd, "There are no registered applications\n");
-               AST_LIST_UNLOCK(&apps);
+               AST_RWLIST_UNLOCK(&apps);
                return -1;
        }
 
@@ -3105,7 +3108,7 @@ static int handle_show_applications(int fd, int argc, char *argv[])
                ast_cli(fd, "    -= Matching Asterisk Applications =-\n");
        }
 
-       AST_LIST_TRAVERSE(&apps, a, list) {
+       AST_RWLIST_TRAVERSE(&apps, a, list) {
                int printapp = 0;
                total_apps++;
                if (like) {
@@ -3140,7 +3143,7 @@ static int handle_show_applications(int fd, int argc, char *argv[])
                ast_cli(fd, "    -= %d Applications Matching =-\n",total_match);
        }
 
-       AST_LIST_UNLOCK(&apps);
+       AST_RWLIST_UNLOCK(&apps);
 
        return RESULT_SUCCESS;
 }
@@ -3744,19 +3747,19 @@ int ast_unregister_application(const char *app)
 {
        struct ast_app *tmp;
 
-       AST_LIST_LOCK(&apps);
-       AST_LIST_TRAVERSE_SAFE_BEGIN(&apps, tmp, list) {
+       AST_RWLIST_WRLOCK(&apps);
+       AST_RWLIST_TRAVERSE_SAFE_BEGIN(&apps, tmp, list) {
                if (!strcasecmp(app, tmp->name)) {
                        unreference_cached_app(tmp);
-                       AST_LIST_REMOVE_CURRENT(&apps, list);
+                       AST_RWLIST_REMOVE_CURRENT(&apps, list);
                        if (option_verbose > 1)
                                ast_verbose( VERBOSE_PREFIX_2 "Unregistered application '%s'\n", tmp->name);
                        free(tmp);
                        break;
                }
        }
-       AST_LIST_TRAVERSE_SAFE_END
-       AST_LIST_UNLOCK(&apps);
+       AST_RWLIST_TRAVERSE_SAFE_END
+       AST_RWLIST_UNLOCK(&apps);
 
        return tmp ? 0 : -1;
 }
@@ -3846,10 +3849,10 @@ void ast_merge_contexts_and_delete(struct ast_context **extcontexts, const char
           other code paths that use this order
        */
        ast_mutex_lock(&conlock);
-       AST_LIST_LOCK(&hints);
+       AST_RWLIST_WRLOCK(&hints);
 
        /* preserve all watchers for hints associated with this registrar */
-       AST_LIST_TRAVERSE(&hints, hint, list) {
+       AST_RWLIST_TRAVERSE(&hints, hint, list) {
                if (hint->callbacks && !strcmp(registrar, hint->exten->parent->registrar)) {
                        length = strlen(hint->exten->exten) + strlen(hint->exten->parent->name) + 2 + sizeof(*this);
                        if (!(this = ast_calloc(1, length)))
@@ -3897,7 +3900,7 @@ void ast_merge_contexts_and_delete(struct ast_context **extcontexts, const char
        while ((this = AST_LIST_REMOVE_HEAD(&store, list))) {
                exten = ast_hint_extension(NULL, this->context, this->exten);
                /* Find the hint in the list of hints */
-               AST_LIST_TRAVERSE(&hints, hint, list) {
+               AST_RWLIST_TRAVERSE(&hints, hint, list) {
                        if (hint->exten == exten)
                                break;
                }
@@ -3922,7 +3925,7 @@ void ast_merge_contexts_and_delete(struct ast_context **extcontexts, const char
                free(this);
        }
 
-       AST_LIST_UNLOCK(&hints);
+       AST_RWLIST_UNLOCK(&hints);
        ast_mutex_unlock(&conlock);
 
        return;