Sat Aug 6 00:39:59 2011

Asterisk developer's documentation


module.h File Reference

Asterisk module definitions. More...

#include "asterisk/utils.h"

Go to the source code of this file.

Data Structures

struct  ast_module_info

Defines

#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 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_BUILDSUM = (1 << 1), AST_MODFLAG_LOAD_FIRST = (1 << 2) }
enum  ast_module_load_result { AST_MODULE_LOAD_SUCCESS = 0, AST_MODULE_LOAD_DECLINE = 1, AST_MODULE_LOAD_SKIP = 2, AST_MODULE_LOAD_FAILURE = -1 }
enum  ast_module_unload_mode { AST_FORCE_SOFT = 0, AST_FORCE_FIRM = 1, AST_FORCE_HARD = 2 }

Functions

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.
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.
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_unload_resource (const char *resource_name, enum ast_module_unload_mode)
 Unload a module.
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 const 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 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 270 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 289 of file module.h.

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

Definition at line 228 of file module.h.

Referenced by __login_exec(), _macro_exec(), _while_exec(), acf_curl_exec(), acf_cut_exec(), acf_rand_exec(), acf_sort_exec(), acf_vmcount_exec(), admin_exec(), adsi_exec(), agi_exec_full(), alarmreceiver_exec(), amd_exec(), app_exec(), appendcdruserfield_exec(), aqm_exec(), asyncgoto_exec(), auth_exec(), background_detect_exec(), builtin_parkcall(), chanavail_exec(), chanspy_exec(), conf_exec(), controlplayback_exec(), count_exec(), cpeid_exec(), del_exec(), deltree_exec(), dictate_exec(), directory_exec(), disa_exec(), dumpchan_exec(), dundifunc_read(), echo_exec(), exec(), exec_exec(), execif_exec(), extenspy_exec(), festival_exec(), flash_exec(), function_enum(), function_realtime_read(), function_realtime_write(), function_txtcidname(), gosub_exec(), gosubif_exec(), hasvoicemail_exec(), ices_exec(), local_new(), log_exec(), lookupblacklist_exec(), lookupcidname_exec(), macroif_exec(), milliwatt_exec(), mixmonitor_exec(), morsecode_exec(), mp3_exec(), nbs_new(), NBScat_exec(), nocdr_exec(), ospauth_exec(), ospfinished_exec(), osplookup_exec(), ospnext_exec(), page_exec(), park_call_exec(), park_exec(), parkandannounce_exec(), pickup_exec(), playback_exec(), pqm_exec(), privacy_exec(), ql_exec(), queue_exec(), queue_function_queuemembercount(), queue_function_queuememberlist(), queue_function_queuewaitingcount(), random_exec(), read_exec(), readfile_exec(), realtime_exec(), realtime_update_exec(), record_exec(), retrydial_exec(), rqm_exec(), sayunixtime_exec(), senddtmf_exec(), sendimage_exec(), sendtext_exec(), sendurl_exec(), setcallerid_exec(), setcallerid_pres_exec(), setcdruserfield_exec(), settransfercapability_exec(), skel_exec(), smdi_msg_read(), smdi_msg_retrieve_read(), sms_exec(), softhangup_exec(), speech_activate(), speech_background(), speech_create(), speech_deactivate(), speech_destroy(), speech_load(), speech_processing_sound(), speech_start(), speech_unload(), system_exec_helper(), testclient_exec(), testserver_exec(), transfer_exec(), tryexec_exec(), upqm_exec(), userevent_exec(), verbose_exec(), vm_box_exists(), vm_exec(), vm_execmain(), vmauthenticate(), waitforring_exec(), and zapateller_exec().

 
#define ast_module_user_hangup_all (  )     __ast_module_user_hangup_all(ast_module_info->self)

Definition at line 230 of file module.h.

Referenced by unload_module().

#define ast_module_user_remove ( user   )     __ast_module_user_remove(ast_module_info->self, user)

Definition at line 229 of file module.h.

Referenced by _macro_exec(), acf_curl_exec(), acf_cut_exec(), acf_rand_exec(), acf_sort_exec(), acf_vmcount_exec(), admin_exec(), adsi_exec(), agi_exec_full(), alarmreceiver_exec(), amd_exec(), app_exec(), appendcdruserfield_exec(), aqm_exec(), asyncgoto_exec(), auth_exec(), background_detect_exec(), builtin_parkcall(), chanavail_exec(), chanspy_exec(), conf_exec(), controlplayback_exec(), count_exec(), cpeid_exec(), del_exec(), deltree_exec(), dictate_exec(), directory_exec(), disa_exec(), dumpchan_exec(), dundifunc_read(), echo_exec(), exec(), exec_exec(), execif_exec(), extenspy_exec(), festival_exec(), flash_exec(), function_enum(), function_realtime_read(), function_realtime_write(), function_txtcidname(), gosub_exec(), gosubif_exec(), hasvoicemail_exec(), ices_exec(), local_hangup(), log_exec(), lookupblacklist_exec(), lookupcidname_exec(), macroif_exec(), milliwatt_exec(), mixmonitor_exec(), morsecode_exec(), mp3_exec(), nbs_destroy(), NBScat_exec(), nocdr_exec(), ospauth_exec(), ospfinished_exec(), osplookup_exec(), ospnext_exec(), page_exec(), park_call_exec(), park_exec(), parkandannounce_exec(), pickup_exec(), playback_exec(), pqm_exec(), privacy_exec(), ql_exec(), queue_function_queuemembercount(), queue_function_queuememberlist(), queue_function_queuewaitingcount(), random_exec(), read_exec(), readfile_exec(), realtime_exec(), realtime_update_exec(), record_exec(), retrydial_exec(), rqm_exec(), sayunixtime_exec(), senddtmf_exec(), sendimage_exec(), sendtext_exec(), sendurl_exec(), setcallerid_exec(), setcallerid_pres_exec(), setcdruserfield_exec(), settransfercapability_exec(), skel_exec(), smdi_msg_read(), smdi_msg_retrieve_read(), sms_exec(), softhangup_exec(), speech_activate(), speech_background(), speech_create(), speech_deactivate(), speech_destroy(), speech_load(), speech_processing_sound(), speech_start(), speech_unload(), system_exec_helper(), testclient_exec(), testserver_exec(), transfer_exec(), tryexec_exec(), upqm_exec(), verbose_exec(), vm_box_exists(), vm_exec(), vm_execmain(), vmauthenticate(), waitforring_exec(), and zapateller_exec().

#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

enum ast_module_flags

Enumerator:
AST_MODFLAG_DEFAULT 
AST_MODFLAG_GLOBAL_SYMBOLS 
AST_MODFLAG_BUILDSUM 
AST_MODFLAG_LOAD_FIRST  Load this module in the first pass on auto loading.

When module auto loading is used, modules with this flag set will be loaded after preloaded modules, but before all modules being automatically loaded without this flag set on them.

Definition at line 179 of file module.h.

00179                       {
00180    AST_MODFLAG_DEFAULT = 0,
00181    AST_MODFLAG_GLOBAL_SYMBOLS = (1 << 0),
00182    AST_MODFLAG_BUILDSUM = (1 << 1),
00183    /*!
00184     * \brief Load this module in the first pass on auto loading
00185     *
00186     * When module auto loading is used, modules with this flag set will
00187     * be loaded after preloaded modules, but before all modules being
00188     * automatically loaded without this flag set on them.
00189     */
00190    AST_MODFLAG_LOAD_FIRST = (1 << 2),
00191 };

enum ast_module_load_result

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_FAILURE  Module could not be loaded properly

Definition at line 60 of file module.h.

00060                             {
00061    AST_MODULE_LOAD_SUCCESS = 0,  /*!< Module loaded and configured */
00062    AST_MODULE_LOAD_DECLINE = 1,  /*!< Module is not configured */
00063    AST_MODULE_LOAD_SKIP = 2,  /*!< Module was skipped for some reason */
00064    AST_MODULE_LOAD_FAILURE = -1, /*!< Module could not be loaded properly */
00065 };

enum ast_module_unload_mode

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.

00053                             {
00054    AST_FORCE_SOFT = 0, /*!< Softly unload a module, only if not in use */
00055    AST_FORCE_FIRM = 1, /*!< Firmly unload a module, even if in use */
00056    AST_FORCE_HARD = 2, /*!< as FIRM, plus dlclose() on the module. Not recommended
00057             as it may cause crashes */
00058 };


Function Documentation

struct ast_module_user* __ast_module_user_add ( struct ast_module ,
struct ast_channel  
)

Definition at line 197 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_user::entry, ast_module::usecount, and ast_module::users.

00199 {
00200    struct ast_module_user *u = ast_calloc(1, sizeof(*u));
00201 
00202    if (!u)
00203       return NULL;
00204 
00205    u->chan = chan;
00206 
00207    AST_LIST_LOCK(&mod->users);
00208    AST_LIST_INSERT_HEAD(&mod->users, u, entry);
00209    AST_LIST_UNLOCK(&mod->users);
00210 
00211    ast_atomic_fetchadd_int(&mod->usecount, +1);
00212 
00213    ast_update_use_count();
00214 
00215    return u;
00216 }

void __ast_module_user_hangup_all ( struct ast_module  ) 

Definition at line 229 of file loader.c.

References ast_atomic_fetchadd_int(), AST_LIST_LOCK, AST_LIST_REMOVE_HEAD, AST_LIST_UNLOCK, ast_softhangup(), AST_SOFTHANGUP_APPUNLOAD, ast_update_use_count(), ast_module_user::chan, ast_module_user::entry, free, ast_module::usecount, and ast_module::users.

Referenced by ast_unload_resource().

00230 {
00231    struct ast_module_user *u;
00232 
00233    AST_LIST_LOCK(&mod->users);
00234    while ((u = AST_LIST_REMOVE_HEAD(&mod->users, entry))) {
00235       ast_softhangup(u->chan, AST_SOFTHANGUP_APPUNLOAD);
00236       ast_atomic_fetchadd_int(&mod->usecount, -1);
00237       free(u);
00238    }
00239    AST_LIST_UNLOCK(&mod->users);
00240 
00241         ast_update_use_count();
00242 }

void __ast_module_user_remove ( struct ast_module ,
struct ast_module_user  
)

Definition at line 218 of file loader.c.

References ast_atomic_fetchadd_int(), AST_LIST_LOCK, AST_LIST_REMOVE, AST_LIST_UNLOCK, ast_update_use_count(), ast_module_user::entry, free, ast_module::usecount, and ast_module::users.

00219 {
00220    AST_LIST_LOCK(&mod->users);
00221    AST_LIST_REMOVE(&mod->users, u, entry);
00222    AST_LIST_UNLOCK(&mod->users);
00223    ast_atomic_fetchadd_int(&mod->usecount, -1);
00224    free(u);
00225 
00226    ast_update_use_count();
00227 }

enum ast_module_load_result ast_load_resource ( const char *  resource_name  ) 

Load a module.

Parameters:
resource_name The name of the module to load.
This function is run by the PBX to load the modules. It performs all loading and initilization 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 837 of file loader.c.

References AST_LIST_LOCK, AST_LIST_UNLOCK, LOAD_ALL, and load_resource().

Referenced by file_ok_sel(), handle_load(), handle_load_deprecated(), and reload().

00838 {
00839        AST_LIST_LOCK(&module_list);
00840        load_resource(resource_name, LOAD_ALL);
00841        AST_LIST_UNLOCK(&module_list);
00842 
00843        return 0;
00844 }

int ast_loader_register ( int(*)(void)  updater  ) 

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

Parameters:
updater The 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.

Returns:
Zero on success and -1 on failure.

Definition at line 1073 of file loader.c.

References AST_LIST_INSERT_HEAD, AST_LIST_LOCK, AST_LIST_UNLOCK, ast_malloc, and ast_module_user::entry.

Referenced by show_console().

01074 {
01075    struct loadupdate *tmp;
01076 
01077    if (!(tmp = ast_malloc(sizeof(*tmp))))
01078       return -1;
01079 
01080    tmp->updater = v;
01081    AST_LIST_LOCK(&updaters);
01082    AST_LIST_INSERT_HEAD(&updaters, tmp, entry);
01083    AST_LIST_UNLOCK(&updaters);
01084 
01085    return 0;
01086 }

int ast_loader_unregister ( int(*)(void)  updater  ) 

Remove a procedure to be run when modules are updated.

Parameters:
updater The updater function to unregister.
This removes the given function from the updater list.

Returns:
Zero on success, -1 on failure.

Definition at line 1088 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, ast_module_user::entry, and loadupdate::updater.

Referenced by exit_now().

01089 {
01090    struct loadupdate *cur;
01091 
01092    AST_LIST_LOCK(&updaters);
01093    AST_LIST_TRAVERSE_SAFE_BEGIN(&updaters, cur, entry) {
01094       if (cur->updater == v)  {
01095          AST_LIST_REMOVE_CURRENT(&updaters, entry);
01096          break;
01097       }
01098    }
01099    AST_LIST_TRAVERSE_SAFE_END;
01100    AST_LIST_UNLOCK(&updaters);
01101 
01102    return cur ? 0 : -1;
01103 }

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:
line Unused by this function, but this should be the line we are matching.
word The partial name to match.
pos The position the word we are completing is in.
state The possible match to return.
rpos The position we should be matching. This should be the same as pos.
needsreload This 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.
Returns:
A possible completion of the partial match, or NULL if no matches were found.

Definition at line 557 of file loader.c.

References AST_LIST_LOCK, AST_LIST_TRAVERSE, AST_LIST_UNLOCK, ast_module_user::entry, ast_module::info, name, ast_module_info::reload, ast_module::resource, and strdup.

Referenced by complete_mod_2(), complete_mod_2_nr(), complete_mod_3(), complete_mod_3_nr(), complete_mod_4(), and load_module().

00558 {
00559    struct ast_module *cur;
00560    int i, which=0, l = strlen(word);
00561    char *ret = NULL;
00562 
00563    if (pos != rpos)
00564       return NULL;
00565 
00566    AST_LIST_LOCK(&module_list);
00567    AST_LIST_TRAVERSE(&module_list, cur, entry) {
00568       if (!strncasecmp(word, cur->resource, l) &&
00569           (cur->info->reload || !needsreload) &&
00570           ++which > state) {
00571          ret = strdup(cur->resource);
00572          break;
00573       }
00574    }
00575    AST_LIST_UNLOCK(&module_list);
00576 
00577    if (!ret) {
00578       for (i=0; !ret && reload_classes[i].name; i++) {
00579          if (!strncasecmp(word, reload_classes[i].name, l) && ++which > state)
00580             ret = strdup(reload_classes[i].name);
00581       }
00582    }
00583 
00584    return ret;
00585 }

struct ast_module* ast_module_ref ( struct ast_module  ) 

Definition at line 1105 of file loader.c.

References ast_atomic_fetchadd_int(), ast_update_use_count(), and ast_module::usecount.

Referenced by __oh323_new(), alsa_new(), ast_iax2_new(), cli_audio_convert(), cli_audio_convert_deprecated(), complete_orig(), dahdi_new(), features_new(), fn_wrapper(), gtalk_new(), handle_orig(), mgcp_new(), newpvt(), oss_new(), phone_check_exception(), phone_new(), sip_new(), and skinny_new().

01106 {
01107    ast_atomic_fetchadd_int(&mod->usecount, +1);
01108    ast_update_use_count();
01109 
01110    return mod;
01111 }

void ast_module_register ( const struct ast_module_info  ) 

Definition at line 135 of file loader.c.

References ast_calloc, AST_LIST_HEAD_INIT, AST_LIST_INSERT_TAIL, AST_LIST_LOCK, AST_LIST_UNLOCK, embedding, ast_module_user::entry, ast_module::info, ast_module_info::name, resource_being_loaded, ast_module_info::self, and ast_module::users.

00136 {
00137    struct ast_module *mod;
00138 
00139    if (embedding) {
00140       if (!(mod = ast_calloc(1, sizeof(*mod) + strlen(info->name) + 1)))
00141          return;
00142       strcpy(mod->resource, info->name);
00143    } else {
00144       mod = resource_being_loaded;
00145    }
00146 
00147    mod->info = info;
00148    AST_LIST_HEAD_INIT(&mod->users);
00149 
00150    /* during startup, before the loader has been initialized,
00151       there are no threads, so there is no need to take the lock
00152       on this list to manipulate it. it is also possible that it
00153       might be unsafe to use the list lock at that point... so
00154       let's avoid it altogether
00155    */
00156    if (!embedding)
00157       AST_LIST_LOCK(&module_list);
00158 
00159    /* it is paramount that the new entry be placed at the tail of
00160       the list, otherwise the code that uses dlopen() to load
00161       dynamic modules won't be able to find out if the module it
00162       just opened was registered or failed to load
00163    */
00164    AST_LIST_INSERT_TAIL(&module_list, mod, entry);
00165 
00166    if (!embedding)
00167       AST_LIST_UNLOCK(&module_list);
00168 
00169    /* give the module a copy of its own handle, for later use in registrations and the like */
00170    *((struct ast_module **) &(info->self)) = mod;
00171 }

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 456 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_user::entry, 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().

00457 {
00458    struct ast_module *mod;
00459    int somethingchanged = 1, final = 0;
00460 
00461    AST_LIST_LOCK(&module_list);
00462 
00463    /*!\note Some resources, like timers, are started up dynamically, and thus
00464     * may be still in use, even if all channels are dead.  We must therefore
00465     * check the usecount before asking modules to unload. */
00466    do {
00467       if (!somethingchanged) {
00468          /*!\note If we go through the entire list without changing
00469           * anything, ignore the usecounts and unload, then exit. */
00470          final = 1;
00471       }
00472 
00473       /* Reset flag before traversing the list */
00474       somethingchanged = 0;
00475 
00476       AST_LIST_TRAVERSE_SAFE_BEGIN(&module_list, mod, entry) {
00477          if (!final && mod->usecount) {
00478             continue;
00479          }
00480          AST_LIST_REMOVE_CURRENT(&module_list, entry);
00481          if (mod->flags.running && !mod->flags.declined && mod->info->unload) {
00482             mod->info->unload();
00483          }
00484          AST_LIST_HEAD_DESTROY(&mod->users);
00485          free(mod);
00486          somethingchanged = 1;
00487       }
00488       AST_LIST_TRAVERSE_SAFE_END;
00489    } while (somethingchanged && !final);
00490 
00491    AST_LIST_UNLOCK(&module_list);
00492 }

void ast_module_unref ( struct ast_module  ) 

Definition at line 1113 of file loader.c.

References ast_atomic_fetchadd_int(), ast_update_use_count(), and ast_module::usecount.

Referenced by alsa_hangup(), ast_smdi_interface_destroy(), cli_audio_convert(), cli_audio_convert_deprecated(), complete_orig(), dahdi_destroy_channel_bynum(), dahdi_hangup(), destroy(), filestream_destructor(), gtalk_hangup(), handle_orig(), iax2_predestroy(), mgcp_hangup(), oh323_hangup(), oss_hangup(), phone_check_exception(), phone_hangup(), and sip_hangup().

01114 {
01115    ast_atomic_fetchadd_int(&mod->usecount, -1);
01116    ast_update_use_count();
01117 }

void ast_module_unregister ( const struct ast_module_info  ) 

Definition at line 173 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_user::entry, free, ast_module::info, and ast_module::users.

00174 {
00175    struct ast_module *mod = NULL;
00176 
00177    /* it is assumed that the users list in the module structure
00178       will already be empty, or we cannot have gotten to this
00179       point
00180    */
00181    AST_LIST_LOCK(&module_list);
00182    AST_LIST_TRAVERSE_SAFE_BEGIN(&module_list, mod, entry) {
00183       if (mod->info == info) {
00184          AST_LIST_REMOVE_CURRENT(&module_list, entry);
00185          break;
00186       }
00187    }
00188    AST_LIST_TRAVERSE_SAFE_END;
00189    AST_LIST_UNLOCK(&module_list);
00190 
00191    if (mod) {
00192       AST_LIST_HEAD_DESTROY(&mod->users);
00193       free(mod);
00194    }
00195 }

int ast_unload_resource ( const char *  resource_name,
enum  ast_module_unload_mode 
)

Unload a module.

Parameters:
resource_name The name of the module to unload.
ast_module_unload_mode The 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).

Returns:
Zero on success, -1 on error.

Definition at line 494 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::lib, LOG_WARNING, ast_module::running, unload_dynamic_module(), and ast_module::usecount.

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

00495 {
00496    struct ast_module *mod;
00497    int res = -1;
00498    int error = 0;
00499 
00500    AST_LIST_LOCK(&module_list);
00501 
00502    if (!(mod = find_resource(resource_name, 0))) {
00503       AST_LIST_UNLOCK(&module_list);
00504       return 0;
00505    }
00506 
00507    if (!mod->flags.running || mod->flags.declined) {
00508       ast_log(LOG_WARNING, "Unload failed, '%s' is not loaded.\n", resource_name);
00509       error = 1;
00510    }
00511 
00512    if (!mod->lib) {
00513       ast_log(LOG_WARNING, "Unloading embedded modules is not supported.\n");
00514       error = 1;
00515    }
00516 
00517    if (!error && (mod->usecount > 0)) {
00518       if (force)
00519          ast_log(LOG_WARNING, "Warning:  Forcing removal of module '%s' with use count %d\n",
00520             resource_name, mod->usecount);
00521       else {
00522          ast_log(LOG_WARNING, "Soft unload failed, '%s' has use count %d\n", resource_name,
00523             mod->usecount);
00524          error = 1;
00525       }
00526    }
00527 
00528    if (!error) {
00529       __ast_module_user_hangup_all(mod);
00530       res = mod->info->unload();
00531 
00532       if (res) {
00533          ast_log(LOG_WARNING, "Firm unload failed for %s\n", resource_name);
00534          if (force <= AST_FORCE_FIRM)
00535             error = 1;
00536          else
00537             ast_log(LOG_WARNING, "** Dangerous **: Unloading resource anyway, at user request\n");
00538       }
00539    }
00540 
00541    if (!error)
00542       mod->flags.running = mod->flags.declined = 0;
00543 
00544    AST_LIST_UNLOCK(&module_list);
00545 
00546 #ifdef LOADABLE_MODULES
00547    if (!error)
00548       unload_dynamic_module(mod);
00549 #endif
00550 
00551    if (!error)
00552       ast_update_use_count();
00553 
00554    return res;
00555 }

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:
modentry A callback to an updater function.
like For 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 1053 of file loader.c.

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

Referenced by handle_modlist(), and mod_update().

01055 {
01056    struct ast_module *cur;
01057    int unlock = -1;
01058    int total_mod_loaded = 0;
01059 
01060    if (AST_LIST_TRYLOCK(&module_list))
01061       unlock = 0;
01062 
01063    AST_LIST_TRAVERSE(&module_list, cur, entry) {
01064       total_mod_loaded += modentry(cur->resource, cur->info->description, cur->usecount, like);
01065    }
01066 
01067    if (unlock)
01068       AST_LIST_UNLOCK(&module_list);
01069 
01070    return total_mod_loaded;
01071 }

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 LOCAL_USER macros take care of calling this function for you.

Definition at line 1041 of file loader.c.

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

Referenced by __ast_module_user_add(), __ast_module_user_hangup_all(), __ast_module_user_remove(), agent_new(), ast_module_ref(), ast_module_unref(), ast_unload_resource(), exit_now(), load_module(), load_resource(), oh323_request(), sip_request_call(), and sipsock_read().

01042 {
01043    /* Notify any module monitors that the use count for a
01044       resource has changed */
01045    struct loadupdate *m;
01046 
01047    AST_LIST_LOCK(&updaters);
01048    AST_LIST_TRAVERSE(&updaters, m, entry)
01049       m->updater();
01050    AST_LIST_UNLOCK(&updaters);
01051 }


Variable Documentation

const struct ast_module_info* ast_module_info [static]

Definition at line 268 of file module.h.


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