#include "afb-evt.h"
#include "afb-hook.h"
#include "verbose.h"
+#include "jobs.h"
+#include "uuid.h"
struct afb_evt_watch;
pthread_rwlock_t rwlock;
/* count of reference to the listener */
- int refcount;
+ uint16_t refcount;
};
/*
#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[];
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,
};
#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;
/* 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'
*/
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
*/
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)
*/
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
{
size_t len;
struct afb_evtid *evtid, *oevt;
+ uint16_t id;
/* allocates the event */
len = strlen(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);
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
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 */
/*
* 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;
}
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;
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
/*
* 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;
Code Review / src / app-framework-binder.git / blobdiff