X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fafb-evt.c;h=1c8798fdc39cb8858a407f91748552c19fc73ff3;hb=f40979c718fa6fe6b571e133e1bf19fc90957298;hp=960d4137b501c9b7bd7e48809a5043cd6198b480;hpb=909893eb96838441b64272a649764367dfd69557;p=src%2Fapp-framework-binder.git diff --git a/src/afb-evt.c b/src/afb-evt.c index 960d4137..1c8798fd 100644 --- a/src/afb-evt.c +++ b/src/afb-evt.c @@ -30,6 +30,8 @@ #include "afb-evt.h" #include "afb-hook.h" #include "verbose.h" +#include "jobs.h" +#include "uuid.h" struct afb_evt_watch; @@ -54,7 +56,7 @@ struct afb_evt_listener { pthread_rwlock_t rwlock; /* count of reference to the listener */ - int refcount; + uint16_t refcount; }; /* @@ -80,10 +82,13 @@ struct afb_evtid { #endif /* refcount */ - int refcount; + uint16_t refcount; /* id of the event */ - int id; + uint16_t id; + + /* has client? */ + int has_client; /* fullname of the event */ char fullname[]; @@ -110,6 +115,36 @@ struct afb_evt_watch { unsigned activity; }; +/* + * structure for job of broadcasting events + */ +struct job_broadcast +{ + /** object atached to the event */ + struct json_object *object; + + /** the uuid of the event */ + uuid_binary_t uuid; + + /** remaining hop */ + uint8_t hop; + + /** name of the event to broadcast */ + char event[]; +}; + +/* + * structure for job of broadcasting or pushing events + */ +struct job_evtid +{ + /** the event to broadcast */ + struct afb_evtid *evtid; + + /** object atached to the event */ + struct json_object *object; +}; + /* the interface for events */ static struct afb_event_x2_itf afb_evt_event_x2_itf = { .broadcast = (void*)afb_evt_evtid_broadcast, @@ -130,6 +165,10 @@ static struct afb_event_x2_itf afb_evt_hooked_event_x2_itf = { }; #endif +/* job groups for events push/broadcast */ +#define BROADCAST_JOB_GROUP (&afb_evt_event_x2_itf) +#define PUSH_JOB_GROUP (&afb_evt_event_x2_itf) + /* head of the list of listeners */ static pthread_rwlock_t listeners_rwlock = PTHREAD_RWLOCK_INITIALIZER; static struct afb_evt_listener *listeners = NULL; @@ -137,61 +176,171 @@ static struct afb_evt_listener *listeners = NULL; /* handling id of events */ static pthread_rwlock_t events_rwlock = PTHREAD_RWLOCK_INITIALIZER; static struct afb_evtid *evtids = NULL; -static int event_id_counter = 0; -static int event_id_wrapped = 0; +static uint16_t event_genid = 0; +static uint16_t event_count = 0; + +/* head of uniqueness of events */ +#if !defined(EVENT_BROADCAST_HOP_MAX) +# define EVENT_BROADCAST_HOP_MAX 10 +#endif +#if !defined(EVENT_BROADCAST_MEMORY_COUNT) +# define EVENT_BROADCAST_MEMORY_COUNT 8 +#endif + +#if EVENT_BROADCAST_MEMORY_COUNT +static struct { + pthread_mutex_t mutex; + uint8_t base; + uint8_t count; + uuid_binary_t uuids[EVENT_BROADCAST_MEMORY_COUNT]; +} uniqueness = { + .mutex = PTHREAD_MUTEX_INITIALIZER, + .base = 0, + .count = 0 +}; +#endif /* - * Broadcasts the 'event' of 'id' with its 'obj' - * 'obj' is released (like json_object_put) - * Returns the count of listener having receive the event. + * Create structure for job of broadcasting string 'event' with 'object' + * Returns the created structure or NULL if out of memory */ -static int broadcast(const char *event, struct json_object *obj, int id) +static struct job_broadcast *make_job_broadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop) { - int result; - struct afb_evt_listener *listener; + size_t sz = 1 + strlen(event); + struct job_broadcast *jb = malloc(sz + sizeof *jb); + if (jb) { + jb->object = object; + memcpy(jb->uuid, uuid, sizeof jb->uuid); + jb->hop = hop; + memcpy(jb->event, event, sz); + } + return jb; +} - result = 0; +/* + * Destroy structure 'jb' for job of broadcasting string events + */ +static void destroy_job_broadcast(struct job_broadcast *jb) +{ + json_object_put(jb->object); + free(jb); +} + +/* + * Create structure for job of broadcasting or pushing 'evtid' with 'object' + * Returns the created structure or NULL if out of memory + */ +static struct job_evtid *make_job_evtid(struct afb_evtid *evtid, struct json_object *object) +{ + struct job_evtid *je = malloc(sizeof *je); + if (je) { + je->evtid = afb_evt_evtid_addref(evtid); + je->object = object; + } + return je; +} + +/* + * Destroy structure for job of broadcasting or pushing evtid + */ +static void destroy_job_evtid(struct job_evtid *je) +{ + afb_evt_evtid_unref(je->evtid); + json_object_put(je->object); + free(je); +} + +/* + * Broadcasts the 'event' of 'id' with its 'object' + */ +static void broadcast(struct job_broadcast *jb) +{ + struct afb_evt_listener *listener; pthread_rwlock_rdlock(&listeners_rwlock); listener = listeners; while(listener) { - if (listener->itf->broadcast != NULL) { - listener->itf->broadcast(listener->closure, event, id, json_object_get(obj)); - result++; - } + if (listener->itf->broadcast != NULL) + listener->itf->broadcast(listener->closure, jb->event, json_object_get(jb->object), jb->uuid, jb->hop); listener = listener->next; } pthread_rwlock_unlock(&listeners_rwlock); - json_object_put(obj); - return result; } -#if WITH_AFB_HOOK /* - * Broadcasts the 'event' of 'id' with its 'obj' - * 'obj' is released (like json_object_put) - * calls hooks if hookflags isn't 0 - * Returns the count of listener having receive the event. + * Jobs callback for broadcasting string asynchronously */ -static int hooked_broadcast(const char *event, struct json_object *obj, int id, int hookflags) +static void broadcast_job(int signum, void *closure) { - int result; - - json_object_get(obj); + struct job_broadcast *jb = closure; - if (hookflags & afb_hook_flag_evt_broadcast_before) - afb_hook_evt_broadcast_before(event, id, obj); + if (signum == 0) + broadcast(jb); + destroy_job_broadcast(jb); +} - result = broadcast(event, obj, id); +/* + * Broadcasts the string 'event' with its 'object' + */ +static int unhooked_broadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop) +{ + uuid_binary_t local_uuid; + struct job_broadcast *jb; + int rc; +#if EVENT_BROADCAST_MEMORY_COUNT + int iter, count; +#endif - if (hookflags & afb_hook_flag_evt_broadcast_after) - afb_hook_evt_broadcast_after(event, id, obj, result); + /* check if lately sent */ + if (!uuid) { + uuid_new_binary(local_uuid); + uuid = local_uuid; + hop = EVENT_BROADCAST_HOP_MAX; +#if EVENT_BROADCAST_MEMORY_COUNT + pthread_mutex_lock(&uniqueness.mutex); + } else { + pthread_mutex_lock(&uniqueness.mutex); + iter = (int)uniqueness.base; + count = (int)uniqueness.count; + while (count) { + if (0 == memcmp(uuid, uniqueness.uuids[iter], sizeof(uuid_binary_t))) { + pthread_mutex_unlock(&uniqueness.mutex); + return 0; + } + if (++iter == EVENT_BROADCAST_MEMORY_COUNT) + iter = 0; + count--; + } + } + iter = (int)uniqueness.base; + if (uniqueness.count < EVENT_BROADCAST_MEMORY_COUNT) + iter += (int)(uniqueness.count++); + else if (++uniqueness.base == EVENT_BROADCAST_MEMORY_COUNT) + uniqueness.base = 0; + memcpy(uniqueness.uuids[iter], uuid, sizeof(uuid_binary_t)); + pthread_mutex_unlock(&uniqueness.mutex); +#else + } +#endif - json_object_put(obj); + /* create the structure for the job */ + jb = make_job_broadcast(event, object, uuid, hop); + if (jb == NULL) { + ERROR("Cant't create broadcast string job item for %s(%s)", + event, json_object_to_json_string(object)); + json_object_put(object); + return -1; + } - return result; + /* queue the job */ + rc = jobs_queue(BROADCAST_JOB_GROUP, 0, broadcast_job, jb); + if (rc) { + ERROR("cant't queue broadcast string job item for %s(%s)", + event, json_object_to_json_string(object)); + destroy_job_broadcast(jb); + } + return rc; } -#endif /* * Broadcasts the event 'evtid' with its 'object' @@ -200,7 +349,7 @@ static int hooked_broadcast(const char *event, struct json_object *obj, int id, */ int afb_evt_evtid_broadcast(struct afb_evtid *evtid, struct json_object *object) { - return broadcast(evtid->fullname, object, evtid->id); + return unhooked_broadcast(evtid->fullname, object, NULL, 0); } #if WITH_AFB_HOOK @@ -211,10 +360,42 @@ int afb_evt_evtid_broadcast(struct afb_evtid *evtid, struct json_object *object) */ int afb_evt_evtid_hooked_broadcast(struct afb_evtid *evtid, struct json_object *object) { - return hooked_broadcast(evtid->fullname, object, evtid->id, evtid->hookflags); + int result; + + json_object_get(object); + + if (evtid->hookflags & afb_hook_flag_evt_broadcast_before) + afb_hook_evt_broadcast_before(evtid->fullname, evtid->id, object); + + result = afb_evt_evtid_broadcast(evtid, object); + + if (evtid->hookflags & afb_hook_flag_evt_broadcast_after) + afb_hook_evt_broadcast_after(evtid->fullname, evtid->id, object, result); + + json_object_put(object); + + return result; } #endif +int afb_evt_rebroadcast(const char *event, struct json_object *object, const uuid_binary_t uuid, uint8_t hop) +{ + int result; + +#if WITH_AFB_HOOK + json_object_get(object); + afb_hook_evt_broadcast_before(event, 0, object); +#endif + + result = unhooked_broadcast(event, object, uuid, hop); + +#if WITH_AFB_HOOK + afb_hook_evt_broadcast_after(event, 0, object, result); + json_object_put(object); +#endif + return result; +} + /* * Broadcasts the 'event' with its 'object' * 'object' is released (like json_object_put) @@ -222,39 +403,76 @@ int afb_evt_evtid_hooked_broadcast(struct afb_evtid *evtid, struct json_object * */ int afb_evt_broadcast(const char *event, struct json_object *object) { -#if WITH_AFB_HOOK - return hooked_broadcast(event, object, 0, -1); -#else - return broadcast(event, object, 0); -#endif + return afb_evt_rebroadcast(event, object, NULL, 0); } /* * Pushes the event 'evtid' with 'obj' to its listeners - * 'obj' is released (like json_object_put) * Returns the count of listener that received the event. */ -int afb_evt_evtid_push(struct afb_evtid *evtid, struct json_object *obj) +static void push_evtid(struct afb_evtid *evtid, struct json_object *object) { - int result; + int has_client; struct afb_evt_watch *watch; struct afb_evt_listener *listener; - result = 0; + has_client = 0; pthread_rwlock_rdlock(&evtid->rwlock); watch = evtid->watchs; while(watch) { listener = watch->listener; assert(listener->itf->push != NULL); if (watch->activity != 0) { - listener->itf->push(listener->closure, evtid->fullname, evtid->id, json_object_get(obj)); - result++; + listener->itf->push(listener->closure, evtid->fullname, evtid->id, json_object_get(object)); + has_client = 1; } watch = watch->next_by_evtid; } + evtid->has_client = has_client; pthread_rwlock_unlock(&evtid->rwlock); - json_object_put(obj); - return result; +} + +/* + * Jobs callback for pushing evtid asynchronously + */ +static void push_job_evtid(int signum, void *closure) +{ + struct job_evtid *je = closure; + + if (signum == 0) + push_evtid(je->evtid, je->object); + destroy_job_evtid(je); +} + +/* + * Pushes the event 'evtid' with 'obj' to its listeners + * 'obj' is released (like json_object_put) + * Returns 1 if at least one listener exists or 0 if no listener exists or + * -1 in case of error and the event can't be delivered + */ +int afb_evt_evtid_push(struct afb_evtid *evtid, struct json_object *object) +{ + struct job_evtid *je; + int rc; + + je = make_job_evtid(evtid, object); + if (je == NULL) { + ERROR("Cant't create push evtid job item for %s(%s)", + evtid->fullname, json_object_to_json_string(object)); + json_object_put(object); + return -1; + } + + rc = jobs_queue(PUSH_JOB_GROUP, 0, push_job_evtid, je); + if (rc == 0) + rc = evtid->has_client; + else { + ERROR("cant't queue push evtid job item for %s(%s)", + evtid->fullname, json_object_to_json_string(object)); + destroy_job_evtid(je); + } + + return rc; } #if WITH_AFB_HOOK @@ -327,6 +545,7 @@ struct afb_evtid *afb_evt_evtid_create(const char *fullname) { size_t len; struct afb_evtid *evtid, *oevt; + uint16_t id; /* allocates the event */ len = strlen(fullname); @@ -336,15 +555,20 @@ struct afb_evtid *afb_evt_evtid_create(const char *fullname) /* allocates the id */ pthread_rwlock_wrlock(&events_rwlock); + if (event_count == UINT16_MAX) { + pthread_rwlock_unlock(&events_rwlock); + free(evtid); + ERROR("Can't create more events"); + return NULL; + } + event_count++; do { - if (++event_id_counter < 0) { - event_id_wrapped = 1; - event_id_counter = 1024; /* heuristic: small numbers are not destroyed */ - } - if (!event_id_wrapped) - break; + /* TODO add a guard (counting number of event created) */ + id = ++event_genid; + if (!id) + id = event_genid = 1; oevt = evtids; - while(oevt != NULL && oevt->id != event_id_counter) + while(oevt != NULL && oevt->id != id) oevt = oevt->next; } while (oevt != NULL); @@ -353,7 +577,8 @@ struct afb_evtid *afb_evt_evtid_create(const char *fullname) evtid->next = evtids; evtid->refcount = 1; evtid->watchs = NULL; - evtid->id = event_id_counter; + evtid->id = id; + evtid->has_client = 0; pthread_rwlock_init(&evtid->rwlock, NULL); evtids = evtid; #if WITH_AFB_HOOK @@ -430,8 +655,10 @@ void afb_evt_evtid_unref(struct afb_evtid *evtid) prv = &evtids; while (*prv && !(found = (*prv == evtid))) prv = &(*prv)->next; - if (found) + if (found) { *prv = evtid->next; + event_count--; + } pthread_rwlock_unlock(&events_rwlock); /* destroys the event */ @@ -501,7 +728,7 @@ const char *afb_evt_evtid_hooked_name(struct afb_evtid *evtid) /* * Returns the id of the 'event' */ -int afb_evt_evtid_id(struct afb_evtid *evtid) +uint16_t afb_evt_evtid_id(struct afb_evtid *evtid) { return evtid->id; } @@ -633,6 +860,7 @@ found: if (watch->activity == 0 && listener->itf->add != NULL) listener->itf->add(listener->closure, evtid->fullname, evtid->id); watch->activity++; + evtid->has_client = 1; pthread_rwlock_unlock(&listener->rwlock); return 0; @@ -666,6 +894,36 @@ int afb_evt_watch_sub_evtid(struct afb_evt_listener *listener, struct afb_evtid return -1; } +/* + * Avoids the 'listener' to watch 'eventid' + * Returns 0 in case of success or else -1. + */ +int afb_evt_watch_sub_eventid(struct afb_evt_listener *listener, uint16_t eventid) +{ + struct afb_evt_watch *watch; + struct afb_evtid *evtid; + + /* search the existing watch */ + pthread_rwlock_wrlock(&listener->rwlock); + watch = listener->watchs; + while(watch != NULL) { + evtid = watch->evtid; + if (evtid->id == eventid) { + if (watch->activity != 0) { + watch->activity--; + if (watch->activity == 0 && listener->itf->remove != NULL) + listener->itf->remove(listener->closure, evtid->fullname, evtid->id); + } + pthread_rwlock_unlock(&listener->rwlock); + return 0; + } + watch = watch->next_by_listener; + } + pthread_rwlock_unlock(&listener->rwlock); + errno = ENOENT; + return -1; +} + #if WITH_AFB_HOOK /* * update the hooks for events @@ -723,7 +981,7 @@ const char *afb_evt_event_x2_fullname(struct afb_event_x2 *eventid) /* * Returns the id of the 'eventid' */ -int afb_evt_event_x2_id(struct afb_event_x2 *eventid) +uint16_t afb_evt_event_x2_id(struct afb_event_x2 *eventid) { struct afb_evtid *evtid = afb_evt_event_x2_to_evtid(eventid); return evtid ? evtid->id : 0;