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freeswitch/src/switch_event.c

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/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2005/2006, Anthony Minessale II <anthmct@yahoo.com>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <anthmct@yahoo.com>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Anthony Minessale II <anthmct@yahoo.com>
*
*
* switch_event.c -- Event System
*
*/
#include <switch_event.h>
static switch_event_node *EVENT_NODES[SWITCH_EVENT_ALL+1] = {NULL};
static switch_mutex_t *BLOCK = NULL;
static switch_mutex_t *POOL_LOCK = NULL;
static switch_memory_pool *RUNTIME_POOL = NULL;
static switch_memory_pool *APOOL = NULL;
static switch_memory_pool *BPOOL = NULL;
static switch_memory_pool *THRUNTIME_POOL = NULL;
static switch_queue_t *EVENT_QUEUE = NULL;
//#define MALLOC_EVENTS
#ifdef MALLOC_EVENTS
static int POOL_COUNT = 0;
#endif
static int POOL_COUNT_MAX = 100;
static switch_hash *CUSTOM_HASH = NULL;
static int THREAD_RUNNING = 0;
#ifdef MALLOC_EVENTS
#define ALLOC(size) malloc(size)
#define DUP(str) strdup(str)
#else
static void *locked_alloc(size_t len)
{
void *mem;
switch_mutex_lock(POOL_LOCK);
/* <LOCKED> -----------------------------------------------*/
mem = switch_core_alloc(THRUNTIME_POOL, len);
switch_mutex_unlock(POOL_LOCK);
/* </LOCKED> ----------------------------------------------*/
return mem;
}
static void *locked_dup(char *str)
{
char *dup;
switch_mutex_lock(POOL_LOCK);
/* <LOCKED> -----------------------------------------------*/
dup = switch_core_strdup(THRUNTIME_POOL, str);
switch_mutex_unlock(POOL_LOCK);
/* </LOCKED> ----------------------------------------------*/
return dup;
}
#define ALLOC(size) locked_alloc(size)
#define DUP(str) locked_dup(str)
#endif
/* make sure this is synced with the switch_event_t enum in switch_types.h
also never put any new ones before EVENT_ALL
*/
static char *EVENT_NAMES[] = {
"CUSTOM",
"CHANNEL_STATE",
"CHANNEL_ANSWER",
"CHANNEL_HANGUP",
"API",
"LOG",
"INBOUND_CHAN",
"OUTBOUND_CHAN",
"STARTUP",
"SHUTDOWN",
"ALL"
};
static int switch_events_match(switch_event *event, switch_event_node *node)
{
int match = 0;
if (node->event_id == SWITCH_EVENT_ALL) {
match++;
if (!node->subclass) {
return match;
}
}
if (match || event->event_id == node->event_id) {
if (event->subclass && node->subclass) {
if (!strncasecmp(node->subclass->name, "file:", 5)) {
char *file_header;
if ((file_header = switch_event_get_header(event, "file"))) {
match = strstr(node->subclass->name + 5, file_header) ? 1 : 0;
}
} else if (!strncasecmp(node->subclass->name, "func:", 5)) {
char *func_header;
if ((func_header = switch_event_get_header(event, "function"))) {
match = strstr(node->subclass->name + 5, func_header) ? 1 : 0;
}
} else {
match = strstr(event->subclass->name, node->subclass->name) ? 1 : 0;
}
} else if (event->subclass && !node->subclass) {
match = 1;
} else {
match = 0;
}
}
return match;
}
static void * SWITCH_THREAD_FUNC switch_event_thread(switch_thread *thread, void *obj)
{
switch_event_node *node;
switch_event *out_event = NULL;
switch_event_t e;
void *pop;
assert(POOL_LOCK != NULL);
assert(RUNTIME_POOL != NULL);
THREAD_RUNNING = 1;
while(THREAD_RUNNING == 1 || switch_queue_size(EVENT_QUEUE)) {
#ifdef MALLOC_EVENTS
switch_mutex_lock(POOL_LOCK);
/* <LOCKED> -----------------------------------------------*/
if (POOL_COUNT >= POOL_COUNT_MAX) {
if (THRUNTIME_POOL == APOOL) {
THRUNTIME_POOL = BPOOL;
} else {
THRUNTIME_POOL = APOOL;
}
switch_pool_clear(THRUNTIME_POOL);
POOL_COUNT = 0;
}
switch_mutex_unlock(POOL_LOCK);
/* </LOCKED> -----------------------------------------------*/
#endif
while (switch_queue_trypop(EVENT_QUEUE, &pop) == SWITCH_STATUS_SUCCESS) {
out_event = pop;
for(e = out_event->event_id;; e = SWITCH_EVENT_ALL) {
for(node = EVENT_NODES[e]; node; node = node->next) {
if (switch_events_match(out_event, node)) {
out_event->bind_user_data = node->user_data;
node->callback(out_event);
}
}
if (e == SWITCH_EVENT_ALL) {
break;
}
}
switch_event_destroy(&out_event);
}
switch_yield(1000);
}
THREAD_RUNNING = 0;
return NULL;
}
SWITCH_DECLARE(switch_status) switch_event_running(void)
{
return THREAD_RUNNING ? SWITCH_STATUS_SUCCESS : SWITCH_STATUS_FALSE;
}
SWITCH_DECLARE(char *) switch_event_name(switch_event_t event)
{
assert(BLOCK != NULL);
assert(RUNTIME_POOL != NULL);
return EVENT_NAMES[event];
}
SWITCH_DECLARE(switch_status) switch_event_reserve_subclass_detailed(char *owner, char *subclass_name)
{
switch_event_subclass *subclass;
assert(RUNTIME_POOL != NULL);
assert(CUSTOM_HASH != NULL);
if (switch_core_hash_find(CUSTOM_HASH, subclass_name)) {
return SWITCH_STATUS_INUSE;
}
if (!(subclass = switch_core_alloc(RUNTIME_POOL, sizeof(*subclass)))) {
return SWITCH_STATUS_MEMERR;
}
subclass->owner = switch_core_strdup(RUNTIME_POOL, owner);
subclass->name = switch_core_strdup(RUNTIME_POOL, subclass_name);
switch_core_hash_insert(CUSTOM_HASH, subclass->name, subclass);
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_status) switch_event_shutdown(void)
{
THREAD_RUNNING = -1;
while(THREAD_RUNNING) {
switch_yield(1000);
}
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_status) switch_event_init(switch_memory_pool *pool)
{
switch_thread *thread;
switch_threadattr_t *thd_attr;;
switch_threadattr_create(&thd_attr, pool);
switch_threadattr_detach_set(thd_attr, 1);
assert(pool != NULL);
RUNTIME_POOL = pool;
if (switch_core_new_memory_pool(&APOOL) != SWITCH_STATUS_SUCCESS) {
switch_console_printf(SWITCH_CHANNEL_CONSOLE, "Could not allocate memory pool\n");
return SWITCH_STATUS_MEMERR;
}
if (switch_core_new_memory_pool(&BPOOL) != SWITCH_STATUS_SUCCESS) {
switch_console_printf(SWITCH_CHANNEL_CONSOLE, "Could not allocate memory pool\n");
return SWITCH_STATUS_MEMERR;
}
THRUNTIME_POOL = APOOL;
switch_queue_create(&EVENT_QUEUE, POOL_COUNT_MAX + 10, THRUNTIME_POOL);
switch_console_printf(SWITCH_CHANNEL_CONSOLE, "Activate Eventing Engine.\n");
switch_mutex_init(&BLOCK, SWITCH_MUTEX_NESTED, RUNTIME_POOL);
switch_mutex_init(&POOL_LOCK, SWITCH_MUTEX_NESTED, RUNTIME_POOL);
switch_core_hash_init(&CUSTOM_HASH, RUNTIME_POOL);
switch_thread_create(&thread,
thd_attr,
switch_event_thread,
NULL,
RUNTIME_POOL
);
while(!THREAD_RUNNING) {
switch_yield(1000);
}
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_status) switch_event_create_subclass(switch_event **event, switch_event_t event_id, char *subclass_name)
{
if (event_id != SWITCH_EVENT_CUSTOM && subclass_name) {
return SWITCH_STATUS_GENERR;
}
if(!(*event = ALLOC(sizeof(switch_event)))) {
return SWITCH_STATUS_MEMERR;
}
#ifdef MALLOC_EVENTS
memset(*event, 0, sizeof(switch_event));
#endif
(*event)->event_id = event_id;
if (subclass_name) {
(*event)->subclass = switch_core_hash_find(CUSTOM_HASH, subclass_name);
}
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(char *) switch_event_get_header(switch_event *event, char *header_name)
{
switch_event_header *hp;
if (header_name) {
for(hp = event->headers; hp; hp = hp->next) {
if (!strcasecmp(hp->name, header_name)) {
return hp->value;
}
}
}
return NULL;
}
SWITCH_DECLARE(switch_status) switch_event_add_header(switch_event *event, switch_stack_t stack, char *header_name, char *fmt, ...)
{
int ret = 0;
char data[2048];
va_list ap;
va_start(ap, fmt);
vsnprintf(data, sizeof(data), fmt, ap);
va_end(ap);
if (ret == -1) {
return SWITCH_STATUS_MEMERR;
} else {
switch_event_header *header, *hp;
if (!(header = ALLOC(sizeof(*header)))) {
return SWITCH_STATUS_MEMERR;
}
#ifdef MALLOC_EVENTS
memset(header, 0, sizeof(*header));
#endif
header->name = DUP(header_name);
header->value = DUP(data);
if ((stack = SWITCH_STACK_TOP)) {
header->next = event->headers;
event->headers = header;
} else {
for (hp = event->headers; hp && hp->next; hp = hp->next);
if (hp) {
hp->next = header;
} else {
event->headers = header;
}
}
return SWITCH_STATUS_SUCCESS;
}
return (ret >= 0) ? SWITCH_STATUS_SUCCESS : SWITCH_STATUS_GENERR;
}
SWITCH_DECLARE(switch_status) switch_event_add_body(switch_event *event, char *fmt, ...)
{
int ret = 0;
char data[2048];
va_list ap;
va_start(ap, fmt);
vsnprintf(data, sizeof(data), fmt, ap);
va_end(ap);
if (ret == -1) {
return SWITCH_STATUS_MEMERR;
} else {
event->body = DUP(data);
return SWITCH_STATUS_SUCCESS;
}
return (ret >= 0) ? SWITCH_STATUS_SUCCESS : SWITCH_STATUS_GENERR;
}
SWITCH_DECLARE(void) switch_event_destroy(switch_event **event)
{
#ifdef MALLOC_EVENTS
switch_event_header *hp, *tofree;
for (hp = (*event)->headers; hp && hp->next;) {
tofree = hp;
hp = hp->next;
free(tofree->name);
free(tofree->value);
free(tofree);
}
free((*event));
#endif
*event = NULL;
}
SWITCH_DECLARE(switch_status) switch_event_dup(switch_event **event, switch_event *todup)
{
switch_event_header *header, *hp, *hp2;
if (switch_event_create_subclass(event, todup->event_id, todup->subclass->name) != SWITCH_STATUS_SUCCESS) {
return SWITCH_STATUS_GENERR;
}
(*event)->subclass = todup->subclass;
(*event)->event_user_data = todup->event_user_data;
(*event)->bind_user_data = todup->bind_user_data;
for (hp = todup->headers; hp && hp->next;) {
if (!(header = ALLOC(sizeof(*header)))) {
return SWITCH_STATUS_MEMERR;
}
#ifdef MALLOC_EVENTS
memset(header, 0, sizeof(*header));
#endif
header->name = DUP(hp->name);
header->value = DUP(hp->value);
for (hp2 = todup->headers; hp2 && hp2->next; hp2 = hp2->next);
if (hp2) {
hp2->next = header;
} else {
(*event)->headers = header;
}
}
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_status) switch_event_serialize(switch_event *event, char *buf, size_t buflen, char *fmt, ...)
{
size_t len = 0;
switch_event_header *hp;
char *data = NULL, *body = NULL;
int ret = 0;
va_list ap;
if (fmt) {
va_start(ap, fmt);
#ifdef HAVE_VASPRINTF
ret = vasprintf(&data, fmt, ap);
#else
data = (char *) malloc(2048);
vsnprintf(data, 2048, fmt, ap);
#endif
va_end(ap);
if (ret == -1) {
return SWITCH_STATUS_MEMERR;
}
}
for (hp = event->headers; hp; hp = hp->next) {
snprintf(buf+len, buflen-len, "%s: %s\n", hp->name, hp->value);
len = strlen(buf);
}
if (data) {
body = data;
} else if (event->body) {
body = event->body;
}
if (body) {
int blen = (int)strlen(body);
if (blen) {
snprintf(buf+len, buflen-len, "Content-Length: %d\n\n%s", blen, body);
} else {
snprintf(buf+len, buflen-len, "\n");
}
} else {
snprintf(buf+len, buflen-len, "\n");
}
if (data) {
free(data);
}
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_status) switch_event_fire_detailed(char *file, char *func, int line, switch_event **event, void *user_data)
{
switch_time_exp_t tm;
char date[80] = "";
size_t retsize;
assert(BLOCK != NULL);
assert(RUNTIME_POOL != NULL);
if (THREAD_RUNNING <= 0) {
/* sorry we're closed */
switch_event_destroy(event);
return SWITCH_STATUS_FALSE;
}
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Calling-Line-Number", "%d", line);
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Calling-Function", func);
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Calling-File", switch_cut_path(file));
switch_time_exp_lt(&tm, switch_time_now());
switch_strftime(date, &retsize, sizeof(date), "%a, %d-%b-%Y %X", &tm);
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Date-Local", date);
switch_rfc822_date(date, switch_time_now());
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Date-GMT", date);
if ((*event)->subclass) {
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Subclass", (*event)->subclass->name);
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Subclass-Owner", (*event)->subclass->owner);
}
switch_event_add_header(*event, SWITCH_STACK_TOP, "Event-Name", switch_event_name((*event)->event_id));
if (user_data) {
(*event)->event_user_data = user_data;
}
switch_queue_push(EVENT_QUEUE, *event);
*event = NULL;
#ifdef MALLOC_EVENTS
POOL_COUNT++;
#endif
return SWITCH_STATUS_SUCCESS;
}
SWITCH_DECLARE(switch_status) switch_event_bind(char *id, switch_event_t event, char *subclass_name, switch_event_callback_t callback, void *user_data)
{
switch_event_node *event_node;
switch_event_subclass *subclass = NULL;
assert(BLOCK != NULL);
assert(RUNTIME_POOL != NULL);
if (subclass_name) {
if (!(subclass = switch_core_hash_find(CUSTOM_HASH, subclass_name))) {
if (!(subclass = switch_core_alloc(RUNTIME_POOL, sizeof(*subclass)))) {
return SWITCH_STATUS_MEMERR;
} else {
subclass->owner = switch_core_strdup(RUNTIME_POOL, id);
subclass->name = switch_core_strdup(RUNTIME_POOL, subclass_name);
}
}
}
if (event <= SWITCH_EVENT_ALL && (event_node = switch_core_alloc(RUNTIME_POOL, sizeof(switch_event_node)))) {
switch_mutex_lock(BLOCK);
/* <LOCKED> -----------------------------------------------*/
event_node->id = switch_core_strdup(RUNTIME_POOL, id);
event_node->event_id = event;
event_node->subclass = subclass;
event_node->callback = callback;
event_node->user_data = user_data;
if (EVENT_NODES[event]) {
event_node->next = EVENT_NODES[event];
}
EVENT_NODES[event] = event_node;
switch_mutex_unlock(BLOCK);
/* </LOCKED> -----------------------------------------------*/
return SWITCH_STATUS_SUCCESS;
}
return SWITCH_STATUS_MEMERR;
}
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