Thu Apr 28 2011 17:16:09

Asterisk developer's documentation


module.h File Reference

Asterisk module definitions. More...

#include "asterisk/utils.h"
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Data Structures

struct  ast_module_info

Defines

#define __MODULE_INFO_GLOBALS
#define __MODULE_INFO_SECTION
#define AST_MODULE_CONFIG   "modules.conf"
 Module configuration file.
#define AST_MODULE_INFO(keystr, flags_to_set, desc, fields...)
#define AST_MODULE_INFO_STANDARD(keystr, desc)
#define ast_module_user_add(chan)   __ast_module_user_add(ast_module_info->self, chan)
#define ast_module_user_hangup_all()   __ast_module_user_hangup_all(ast_module_info->self)
#define ast_module_user_remove(user)   __ast_module_user_remove(ast_module_info->self, user)
#define ast_register_application(app, execute, synopsis, description)   ast_register_application2(app, execute, synopsis, description, ast_module_info->self)
 Register an application.
#define ast_register_application_xml(app, execute)   ast_register_application(app, execute, NULL, NULL)
 Register an application using XML documentation.
#define ASTERISK_GPL_KEY   "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n"
 The text the key() function should return.

Enumerations

enum  ast_module_flags { AST_MODFLAG_DEFAULT = 0, AST_MODFLAG_GLOBAL_SYMBOLS = (1 << 0), AST_MODFLAG_LOAD_ORDER = (1 << 1) }
enum  ast_module_load_result {
  AST_MODULE_LOAD_SUCCESS = 0, AST_MODULE_LOAD_DECLINE = 1, AST_MODULE_LOAD_SKIP = 2, AST_MODULE_LOAD_PRIORITY = 3,
  AST_MODULE_LOAD_FAILURE = -1
}
enum  ast_module_unload_mode { AST_FORCE_SOFT = 0, AST_FORCE_FIRM = 1, AST_FORCE_HARD = 2 }

Functions

struct ast_module_user__ast_module_user_add (struct ast_module *, struct ast_channel *)
void __ast_module_user_hangup_all (struct ast_module *)
void __ast_module_user_remove (struct ast_module *, struct ast_module_user *)
enum ast_module_load_result ast_load_resource (const char *resource_name)
 Load a module.
int ast_loader_register (int(*updater)(void))
 Add a procedure to be run when modules have been updated.
int ast_loader_unregister (int(*updater)(void))
 Remove a procedure to be run when modules are updated.
int ast_module_check (const char *name)
 Check if module with the name given is loaded.
char * ast_module_helper (const char *line, const char *word, int pos, int state, int rpos, int needsreload)
 Match modules names for the Asterisk cli.
struct ast_moduleast_module_ref (struct ast_module *)
void ast_module_register (const struct ast_module_info *)
void ast_module_shutdown (void)
 Run the unload() callback for all loaded modules.
void ast_module_unref (struct ast_module *)
void ast_module_unregister (const struct ast_module_info *)
int ast_register_application2 (const char *app, int(*execute)(struct ast_channel *, void *), const char *synopsis, const char *description, void *mod)
 Register an application.
int ast_unload_resource (const char *resource_name, enum ast_module_unload_mode)
 Unload a module.
int ast_unregister_application (const char *app)
 Unregister an application.
int ast_update_module_list (int(*modentry)(const char *module, const char *description, int usecnt, const char *like), const char *like)
 Ask for a list of modules, descriptions, and use counts.
void ast_update_use_count (void)
 Notify when usecount has been changed.

Variables

static struct ast_module_infoast_module_info

Detailed Description

Asterisk module definitions.

This file contains the definitons for functions Asterisk modules should provide and some other module related functions.

Definition in file module.h.


Define Documentation

#define __MODULE_INFO_GLOBALS

Definition at line 287 of file module.h.

#define __MODULE_INFO_SECTION

Definition at line 286 of file module.h.

#define AST_MODULE_CONFIG   "modules.conf"

Module configuration file.

Definition at line 51 of file module.h.

Referenced by load_modules().

#define AST_MODULE_INFO (   keystr,
  flags_to_set,
  desc,
  fields... 
)

Definition at line 344 of file module.h.

#define AST_MODULE_INFO_STANDARD (   keystr,
  desc 
)
Value:
AST_MODULE_INFO(keystr, AST_MODFLAG_DEFAULT, desc, \
         .load = load_module,       \
         .unload = unload_module,      \
             )

Definition at line 366 of file module.h.

#define ast_module_user_add (   chan)    __ast_module_user_add(ast_module_info->self, chan)
#define ast_module_user_hangup_all ( )    __ast_module_user_hangup_all(ast_module_info->self)

Definition at line 242 of file module.h.

Referenced by unload_module().

#define ast_module_user_remove (   user)    __ast_module_user_remove(ast_module_info->self, user)
#define ast_register_application (   app,
  execute,
  synopsis,
  description 
)    ast_register_application2(app, execute, synopsis, description, ast_module_info->self)

Register an application.

Parameters:
appShort name of the application
executea function callback to execute the application. It should return non-zero if the channel needs to be hung up.
synopsisa short description (one line synopsis) of the application
descriptionlong description with all of the details about the use of the application

This registers an application with Asterisk's internal application list.

Note:
The individual applications themselves are responsible for registering and unregistering and unregistering their own CLI commands.
Return values:
0success
-1failure.

Definition at line 390 of file module.h.

Referenced by load_module().

#define ast_register_application_xml (   app,
  execute 
)    ast_register_application(app, execute, NULL, NULL)

Register an application using XML documentation.

Parameters:
appShort name of the application
executea function callback to execute the application. It should return non-zero if the channel needs to be hung up.

This registers an application with Asterisk's internal application list.

Note:
The individual applications themselves are responsible for registering and unregistering and unregistering their own CLI commands.
Return values:
0success
-1failure.

Definition at line 406 of file module.h.

Referenced by load_module().

#define ASTERISK_GPL_KEY   "This paragraph is copyright (c) 2006 by Digium, Inc. \In order for your module to load, it must return this \key via a function called \"key\". Any code which \includes this paragraph must be licensed under the GNU \General Public License version 2 or later (at your \option). In addition to Digium's general reservations \of rights, Digium expressly reserves the right to \allow other parties to license this paragraph under \different terms. Any use of Digium, Inc. trademarks or \logos (including \"Asterisk\" or \"Digium\") without \express written permission of Digium, Inc. is prohibited.\n"

The text the key() function should return.

Definition at line 38 of file module.h.


Enumeration Type Documentation

Enumerator:
AST_MODFLAG_DEFAULT 
AST_MODFLAG_GLOBAL_SYMBOLS 
AST_MODFLAG_LOAD_ORDER 

Definition at line 190 of file module.h.

Enumerator:
AST_MODULE_LOAD_SUCCESS 

Module loaded and configured

AST_MODULE_LOAD_DECLINE 

Module is not configured

AST_MODULE_LOAD_SKIP 

Module was skipped for some reason

AST_MODULE_LOAD_PRIORITY 

Module is not loaded yet, but is added to prioity heap

AST_MODULE_LOAD_FAILURE 

Module could not be loaded properly

Definition at line 60 of file module.h.

                            {
   AST_MODULE_LOAD_SUCCESS = 0,    /*!< Module loaded and configured */
   AST_MODULE_LOAD_DECLINE = 1,    /*!< Module is not configured */
   AST_MODULE_LOAD_SKIP = 2,       /*!< Module was skipped for some reason */
   AST_MODULE_LOAD_PRIORITY = 3,   /*!< Module is not loaded yet, but is added to prioity heap */
   AST_MODULE_LOAD_FAILURE = -1,   /*!< Module could not be loaded properly */
};
Enumerator:
AST_FORCE_SOFT 

Softly unload a module, only if not in use

AST_FORCE_FIRM 

Firmly unload a module, even if in use

AST_FORCE_HARD 

as FIRM, plus dlclose() on the module. Not recommended as it may cause crashes

Definition at line 53 of file module.h.

                            {
   AST_FORCE_SOFT = 0, /*!< Softly unload a module, only if not in use */
   AST_FORCE_FIRM = 1, /*!< Firmly unload a module, even if in use */
   AST_FORCE_HARD = 2, /*!< as FIRM, plus dlclose() on the module. Not recommended
            as it may cause crashes */
};

Function Documentation

struct ast_module_user* __ast_module_user_add ( struct ast_module ,
struct ast_channel  
) [read]

Definition at line 195 of file loader.c.

References ast_atomic_fetchadd_int(), ast_calloc, AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_UNLOCK, ast_update_use_count(), ast_module_user::chan, ast_module::usecount, and ast_module::users.

Referenced by ast_func_read(), ast_func_write(), and pbx_exec().

{
   struct ast_module_user *u = ast_calloc(1, sizeof(*u));

   if (!u)
      return NULL;

   u->chan = chan;

   AST_LIST_LOCK(&mod->users);
   AST_LIST_INSERT_HEAD(&mod->users, u, entry);
   AST_LIST_UNLOCK(&mod->users);

   ast_atomic_fetchadd_int(&mod->usecount, +1);

   ast_update_use_count();

   return u;
}
void __ast_module_user_remove ( struct ast_module ,
struct ast_module_user  
)
enum ast_module_load_result ast_load_resource ( const char *  resource_name)

Load a module.

Parameters:
resource_nameThe name of the module to load.

This function is run by the PBX to load the modules. It performs all loading and initialization tasks. Basically, to load a module, just give it the name of the module and it will do the rest.

Returns:
See possible enum values for ast_module_load_result.

Definition at line 834 of file loader.c.

References AST_LIST_LOCK, AST_LIST_UNLOCK, and load_resource().

Referenced by file_ok_sel(), handle_load(), load_module(), manager_moduleload(), and reload().

{
   int res;
   AST_LIST_LOCK(&module_list);
   res = load_resource(resource_name, 0, NULL);
   AST_LIST_UNLOCK(&module_list);

   return res;
}
int ast_loader_register ( int(*)(void)  updater)

Add a procedure to be run when modules have been updated.

Parameters:
updaterThe function to run when modules have been updated.

This function adds the given function to a linked list of functions to be run when the modules are updated.

Return values:
0on success
-1on failure.

Definition at line 1134 of file loader.c.

References AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_UNLOCK, ast_malloc, and loadupdate::updater.

Referenced by show_console().

{
   struct loadupdate *tmp;

   if (!(tmp = ast_malloc(sizeof(*tmp))))
      return -1;

   tmp->updater = v;
   AST_LIST_LOCK(&updaters);
   AST_LIST_INSERT_HEAD(&updaters, tmp, entry);
   AST_LIST_UNLOCK(&updaters);

   return 0;
}
int ast_loader_unregister ( int(*)(void)  updater)

Remove a procedure to be run when modules are updated.

Parameters:
updaterThe updater function to unregister.

This removes the given function from the updater list.

Return values:
0on success
-1on failure.

Definition at line 1149 of file loader.c.

References AST_LIST_LOCK, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, AST_LIST_UNLOCK, and loadupdate::updater.

Referenced by exit_now().

int ast_module_check ( const char *  name)

Check if module with the name given is loaded.

Parameters:
nameModule name, like "chan_sip.so"
Return values:
1if true
0if false

Definition at line 1121 of file loader.c.

References ast_strlen_zero(), and find_resource().

Referenced by ifmodule_read(), load_module(), manager_modulecheck(), and unload_module().

{
   struct ast_module *cur;

   if (ast_strlen_zero(name))
      return 0;       /* FALSE */

   cur = find_resource(name, 1);

   return (cur != NULL);
}
char* ast_module_helper ( const char *  line,
const char *  word,
int  pos,
int  state,
int  rpos,
int  needsreload 
)

Match modules names for the Asterisk cli.

Parameters:
lineUnused by this function, but this should be the line we are matching.
wordThe partial name to match.
posThe position the word we are completing is in.
stateThe possible match to return.
rposThe position we should be matching. This should be the same as pos.
needsreloadThis should be 1 if we need to reload this module and 0 otherwise. This function will only return modules that are reloadble if this is 1.
Return values:
Apossible completion of the partial match.
NULLif no matches were found.

Definition at line 545 of file loader.c.

References AST_LIST_LOCK, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, ast_strdup, ast_module::info, name, reload_classes::name, ast_module_info::reload, and ast_module::resource.

Referenced by handle_modlist(), handle_reload(), handle_unload(), and load_module().

{
   struct ast_module *cur;
   int i, which=0, l = strlen(word);
   char *ret = NULL;

   if (pos != rpos)
      return NULL;

   AST_LIST_LOCK(&module_list);
   AST_LIST_TRAVERSE(&module_list, cur, entry) {
      if (!strncasecmp(word, cur->resource, l) &&
          (cur->info->reload || !needsreload) &&
          ++which > state) {
         ret = ast_strdup(cur->resource);
         break;
      }
   }
   AST_LIST_UNLOCK(&module_list);

   if (!ret) {
      for (i=0; !ret && reload_classes[i].name; i++) {
         if (!strncasecmp(word, reload_classes[i].name, l) && ++which > state)
            ret = ast_strdup(reload_classes[i].name);
      }
   }

   return ret;
}
void ast_module_register ( const struct ast_module_info )

Definition at line 133 of file loader.c.

References ast_calloc, AST_LIST_HEAD_INIT, AST_LIST_INSERT_TAIL, AST_LIST_LOCK, AST_LIST_UNLOCK, embedding, ast_module::info, ast_module::resource, resource_being_loaded, and ast_module::users.

{
   struct ast_module *mod;

   if (embedding) {
      if (!(mod = ast_calloc(1, sizeof(*mod) + strlen(info->name) + 1)))
         return;
      strcpy(mod->resource, info->name);
   } else {
      mod = resource_being_loaded;
   }

   mod->info = info;
   AST_LIST_HEAD_INIT(&mod->users);

   /* during startup, before the loader has been initialized,
      there are no threads, so there is no need to take the lock
      on this list to manipulate it. it is also possible that it
      might be unsafe to use the list lock at that point... so
      let's avoid it altogether
   */
   if (embedding) {
      AST_LIST_INSERT_TAIL(&embedded_module_list, mod, entry);
   } else {
      AST_LIST_LOCK(&module_list);
      /* it is paramount that the new entry be placed at the tail of
         the list, otherwise the code that uses dlopen() to load
         dynamic modules won't be able to find out if the module it
         just opened was registered or failed to load
      */
      AST_LIST_INSERT_TAIL(&module_list, mod, entry);
      AST_LIST_UNLOCK(&module_list);
   }

   /* give the module a copy of its own handle, for later use in registrations and the like */
   *((struct ast_module **) &(info->self)) = mod;
}
void ast_module_shutdown ( void  )

Run the unload() callback for all loaded modules.

This function should be called when Asterisk is shutting down gracefully.

Note:
Some resources, like timers, are started up dynamically, and thus may be still in use, even if all channels are dead. We must therefore check the usecount before asking modules to unload.
If we go through the entire list without changing anything, ignore the usecounts and unload, then exit.

Definition at line 445 of file loader.c.

References AST_LIST_HEAD_DESTROY, AST_LIST_LOCK, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, AST_LIST_UNLOCK, ast_module::declined, ast_module::flags, free, ast_module::info, ast_module::running, ast_module_info::unload, ast_module::usecount, and ast_module::users.

Referenced by quit_handler().

{
   struct ast_module *mod;
   int somethingchanged = 1, final = 0;

   AST_LIST_LOCK(&module_list);

   /*!\note Some resources, like timers, are started up dynamically, and thus
    * may be still in use, even if all channels are dead.  We must therefore
    * check the usecount before asking modules to unload. */
   do {
      if (!somethingchanged) {
         /*!\note If we go through the entire list without changing
          * anything, ignore the usecounts and unload, then exit. */
         final = 1;
      }

      /* Reset flag before traversing the list */
      somethingchanged = 0;

      AST_LIST_TRAVERSE_SAFE_BEGIN(&module_list, mod, entry) {
         if (!final && mod->usecount) {
            continue;
         }
         AST_LIST_REMOVE_CURRENT(entry);
         if (mod->flags.running && !mod->flags.declined && mod->info->unload) {
            mod->info->unload();
         }
         AST_LIST_HEAD_DESTROY(&mod->users);
         free(mod);
         somethingchanged = 1;
      }
      AST_LIST_TRAVERSE_SAFE_END;
   } while (somethingchanged && !final);

   AST_LIST_UNLOCK(&module_list);
}
void ast_module_unregister ( const struct ast_module_info )

Definition at line 171 of file loader.c.

References ast_free, AST_LIST_HEAD_DESTROY, AST_LIST_LOCK, AST_LIST_REMOVE_CURRENT, AST_LIST_TRAVERSE_SAFE_BEGIN, AST_LIST_TRAVERSE_SAFE_END, AST_LIST_UNLOCK, ast_module::info, and ast_module::users.

{
   struct ast_module *mod = NULL;

   /* it is assumed that the users list in the module structure
      will already be empty, or we cannot have gotten to this
      point
   */
   AST_LIST_LOCK(&module_list);
   AST_LIST_TRAVERSE_SAFE_BEGIN(&module_list, mod, entry) {
      if (mod->info == info) {
         AST_LIST_REMOVE_CURRENT(entry);
         break;
      }
   }
   AST_LIST_TRAVERSE_SAFE_END;
   AST_LIST_UNLOCK(&module_list);

   if (mod) {
      AST_LIST_HEAD_DESTROY(&mod->users);
      ast_free(mod);
   }
}
int ast_register_application2 ( const char *  app,
int(*)(struct ast_channel *, void *)  execute,
const char *  synopsis,
const char *  description,
void *  mod 
)

Register an application.

Parameters:
appShort name of the application
executea function callback to execute the application. It should return non-zero if the channel needs to be hung up.
synopsisa short description (one line synopsis) of the application
descriptionlong description with all of the details about the use of the application
modmodule this application belongs to

This registers an application with Asterisk's internal application list.

Note:
The individual applications themselves are responsible for registering and unregistering and unregistering their own CLI commands.
Return values:
0success
-1failure.

Definition at line 5120 of file pbx.c.

References ast_app::arguments, ast_calloc, ast_free, ast_log(), AST_RWLIST_INSERT_BEFORE_CURRENT, AST_RWLIST_INSERT_TAIL, AST_RWLIST_TRAVERSE, AST_RWLIST_TRAVERSE_SAFE_BEGIN, AST_RWLIST_TRAVERSE_SAFE_END, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, AST_STATIC_DOC, ast_string_field_init, ast_string_field_set, ast_strlen_zero(), ast_verb, AST_XML_DOC, COLOR_BRCYAN, ast_app::docsrc, ast_app::execute, LOG_WARNING, ast_app::seealso, ast_app::syntax, and term_color().

Referenced by ast_features_init(), and load_pbx().

{
   struct ast_app *tmp, *cur = NULL;
   char tmps[80];
   int length, res;
#ifdef AST_XML_DOCS
   char *tmpxml;
#endif

   AST_RWLIST_WRLOCK(&apps);
   AST_RWLIST_TRAVERSE(&apps, tmp, list) {
      if (!(res = strcasecmp(app, tmp->name))) {
         ast_log(LOG_WARNING, "Already have an application '%s'\n", app);
         AST_RWLIST_UNLOCK(&apps);
         return -1;
      } else if (res < 0)
         break;
   }

   length = sizeof(*tmp) + strlen(app) + 1;

   if (!(tmp = ast_calloc(1, length))) {
      AST_RWLIST_UNLOCK(&apps);
      return -1;
   }

   if (ast_string_field_init(tmp, 128)) {
      AST_RWLIST_UNLOCK(&apps);
      ast_free(tmp);
      return -1;
   }

#ifdef AST_XML_DOCS
   /* Try to lookup the docs in our XML documentation database */
   if (ast_strlen_zero(synopsis) && ast_strlen_zero(description)) {
      /* load synopsis */
      tmpxml = ast_xmldoc_build_synopsis("application", app);
      ast_string_field_set(tmp, synopsis, tmpxml);
      ast_free(tmpxml);

      /* load description */
      tmpxml = ast_xmldoc_build_description("application", app);
      ast_string_field_set(tmp, description, tmpxml);
      ast_free(tmpxml);

      /* load syntax */
      tmpxml = ast_xmldoc_build_syntax("application", app);
      ast_string_field_set(tmp, syntax, tmpxml);
      ast_free(tmpxml);

      /* load arguments */
      tmpxml = ast_xmldoc_build_arguments("application", app);
      ast_string_field_set(tmp, arguments, tmpxml);
      ast_free(tmpxml);

      /* load seealso */
      tmpxml = ast_xmldoc_build_seealso("application", app);
      ast_string_field_set(tmp, seealso, tmpxml);
      ast_free(tmpxml);
      tmp->docsrc = AST_XML_DOC;
   } else {
#endif
      ast_string_field_set(tmp, synopsis, synopsis);
      ast_string_field_set(tmp, description, description);
      tmp->docsrc = AST_STATIC_DOC;
#ifdef AST_XML_DOCS
   }
#endif

   strcpy(tmp->name, app);
   tmp->execute = execute;
   tmp->module = mod;

   /* Store in alphabetical order */
   AST_RWLIST_TRAVERSE_SAFE_BEGIN(&apps, cur, list) {
      if (strcasecmp(tmp->name, cur->name) < 0) {
         AST_RWLIST_INSERT_BEFORE_CURRENT(tmp, list);
         break;
      }
   }
   AST_RWLIST_TRAVERSE_SAFE_END;
   if (!cur)
      AST_RWLIST_INSERT_TAIL(&apps, tmp, list);

   ast_verb(2, "Registered application '%s'\n", term_color(tmps, tmp->name, COLOR_BRCYAN, 0, sizeof(tmps)));

   AST_RWLIST_UNLOCK(&apps);

   return 0;
}
int ast_unload_resource ( const char *  resource_name,
enum  ast_module_unload_mode 
)

Unload a module.

Parameters:
resource_nameThe name of the module to unload.
ast_module_unload_modeThe force flag. This should be set using one of the AST_FORCE flags.

This function unloads a module. It will only unload modules that are not in use (usecount not zero), unless AST_FORCE_FIRM or AST_FORCE_HARD is specified. Setting AST_FORCE_FIRM or AST_FORCE_HARD will unload the module regardless of consequences (NOT RECOMMENDED).

Return values:
0on success.
-1on error.

Definition at line 483 of file loader.c.

References __ast_module_user_hangup_all(), AST_FORCE_FIRM, AST_LIST_LOCK, AST_LIST_UNLOCK, ast_log(), ast_update_use_count(), ast_module::declined, find_resource(), ast_module::flags, ast_module::info, ast_module::lib, LOG_WARNING, ast_module_info::restore_globals, ast_module::running, ast_module_info::unload, and ast_module::usecount.

Referenced by exit_now(), handle_unload(), manager_moduleload(), reload(), and remove_module().

{
   struct ast_module *mod;
   int res = -1;
   int error = 0;

   AST_LIST_LOCK(&module_list);

   if (!(mod = find_resource(resource_name, 0))) {
      AST_LIST_UNLOCK(&module_list);
      ast_log(LOG_WARNING, "Unload failed, '%s' could not be found\n", resource_name);
      return -1;
   }

   if (!mod->flags.running || mod->flags.declined) {
      ast_log(LOG_WARNING, "Unload failed, '%s' is not loaded.\n", resource_name);
      error = 1;
   }

   if (!error && (mod->usecount > 0)) {
      if (force)
         ast_log(LOG_WARNING, "Warning:  Forcing removal of module '%s' with use count %d\n",
            resource_name, mod->usecount);
      else {
         ast_log(LOG_WARNING, "Soft unload failed, '%s' has use count %d\n", resource_name,
            mod->usecount);
         error = 1;
      }
   }

   if (!error) {
      __ast_module_user_hangup_all(mod);
      res = mod->info->unload();

      if (res) {
         ast_log(LOG_WARNING, "Firm unload failed for %s\n", resource_name);
         if (force <= AST_FORCE_FIRM)
            error = 1;
         else
            ast_log(LOG_WARNING, "** Dangerous **: Unloading resource anyway, at user request\n");
      }
   }

   if (!error)
      mod->flags.running = mod->flags.declined = 0;

   AST_LIST_UNLOCK(&module_list);

   if (!error && !mod->lib && mod->info && mod->info->restore_globals)
      mod->info->restore_globals();

#ifdef LOADABLE_MODULES
   if (!error)
      unload_dynamic_module(mod);
#endif

   if (!error)
      ast_update_use_count();

   return res;
}
int ast_unregister_application ( const char *  app)

Unregister an application.

Parameters:
appname of the application (does not have to be the same string as the one that was registered)

This unregisters an application from Asterisk's internal application list.

Return values:
0success
-1failure

Definition at line 6461 of file pbx.c.

References ast_free, AST_RWLIST_REMOVE_CURRENT, AST_RWLIST_TRAVERSE_SAFE_BEGIN, AST_RWLIST_TRAVERSE_SAFE_END, AST_RWLIST_UNLOCK, AST_RWLIST_WRLOCK, ast_string_field_free_memory, ast_verb, and unreference_cached_app().

Referenced by __unload_module(), load_module(), and unload_module().

{
   struct ast_app *tmp;

   AST_RWLIST_WRLOCK(&apps);
   AST_RWLIST_TRAVERSE_SAFE_BEGIN(&apps, tmp, list) {
      if (!strcasecmp(app, tmp->name)) {
         unreference_cached_app(tmp);
         AST_RWLIST_REMOVE_CURRENT(list);
         ast_verb(2, "Unregistered application '%s'\n", tmp->name);
         ast_string_field_free_memory(tmp);
         ast_free(tmp);
         break;
      }
   }
   AST_RWLIST_TRAVERSE_SAFE_END;
   AST_RWLIST_UNLOCK(&apps);

   return tmp ? 0 : -1;
}
int ast_update_module_list ( int(*)(const char *module, const char *description, int usecnt, const char *like)  modentry,
const char *  like 
)

Ask for a list of modules, descriptions, and use counts.

Parameters:
modentryA callback to an updater function.
likeFor each of the modules loaded, modentry will be executed with the resource, description, and usecount values of each particular module.
Returns:
the number of modules loaded

Definition at line 1100 of file loader.c.

References AST_LIST_TRAVERSE, AST_LIST_TRYLOCK, AST_LIST_UNLOCK, ast_module_info::description, ast_module::info, ast_module::resource, and ast_module::usecount.

Referenced by ast_var_Modules(), handle_modlist(), and mod_update().

{
   struct ast_module *cur;
   int unlock = -1;
   int total_mod_loaded = 0;

   if (AST_LIST_TRYLOCK(&module_list))
      unlock = 0;
 
   AST_LIST_TRAVERSE(&module_list, cur, entry) {
      total_mod_loaded += modentry(cur->resource, cur->info->description, cur->usecount, like);
   }

   if (unlock)
      AST_LIST_UNLOCK(&module_list);

   return total_mod_loaded;
}
void ast_update_use_count ( void  )

Notify when usecount has been changed.

This function calulates use counts and notifies anyone trying to keep track of them. It should be called whenever your module's usecount changes.

Note:
The ast_module_user_* functions take care of calling this function for you.

Definition at line 1088 of file loader.c.

References AST_LIST_LOCK, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, and loadupdate::updater.

Referenced by __ast_module_user_add(), __ast_module_user_hangup_all(), __ast_module_user_remove(), ast_module_ref(), ast_module_unref(), ast_unload_resource(), exit_now(), handle_request_do(), load_module(), oh323_request(), scheduler_process_request_queue(), sip_request_call(), start_resource(), and unistim_new().

{
   /* Notify any module monitors that the use count for a
      resource has changed */
   struct loadupdate *m;

   AST_LIST_LOCK(&updaters);
   AST_LIST_TRAVERSE(&updaters, m, entry)
      m->updater();
   AST_LIST_UNLOCK(&updaters);
}

Variable Documentation

struct ast_module_info* ast_module_info [static]

Definition at line 283 of file module.h.