Add 'afb_service_call_sync' function
[src/app-framework-binder.git] / src / afb-svc.c
index 5717341..ac01291 100644 (file)
 #define _GNU_SOURCE
 
 #include <stdlib.h>
+#include <string.h>
 #include <errno.h>
 
 #include <json-c/json.h>
 
-#include <afb/afb-req-itf.h>
-#include <afb/afb-service-itf.h>
+#include <afb/afb-binding-v1.h>
+#include <afb/afb-binding-v2.h>
 
 #include "afb-session.h"
 #include "afb-context.h"
@@ -33,7 +34,7 @@
 #include "afb-xreq.h"
 #include "afb-cred.h"
 #include "afb-apiset.h"
-#include "afb-ditf.h"
+#include "jobs.h"
 #include "verbose.h"
 
 /*
@@ -51,13 +52,7 @@ struct afb_svc
        struct afb_evt_listener *listener;
 
        /* on event callback for the service */
-       union {
-               void (*on_event_v1)(const char *event, struct json_object *object);
-               void (*on_event_v2)(struct afb_service service, const char *event, struct json_object *object);
-       };
-
-       /* the daemon interface */
-       struct afb_ditf *ditf;
+       void (*on_event)(const char *event, struct json_object *object);
 };
 
 /*
@@ -67,30 +62,35 @@ struct svc_req
 {
        struct afb_xreq xreq;
 
+       struct afb_svc *svc;
+
        /* the args */
        void (*callback)(void*, int, struct json_object*);
        void *closure;
+
+       /* sync */
+       struct jobloop *jobloop;
+       struct json_object *result;
+       int iserror;
 };
 
 /* functions for services */
-static void svc_on_event_v1(void *closure, const char *event, int eventid, struct json_object *object);
-static void svc_on_event_v2(void *closure, const char *event, int eventid, struct json_object *object);
+static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object);
 static void svc_call(void *closure, const char *api, const char *verb, struct json_object *args,
                                void (*callback)(void*, int, struct json_object*), void *cbclosure);
+static int svc_call_sync(void *closure, const char *api, const char *verb, struct json_object *args,
+                               struct json_object **result);
 
 /* the interface for services */
 static const struct afb_service_itf service_itf = {
-       .call = svc_call
+       .call = svc_call,
+       .call_sync = svc_call_sync
 };
 
 /* the interface for events */
-static const struct afb_evt_itf evt_itf_v1 = {
-       .broadcast = svc_on_event_v1,
-       .push = svc_on_event_v1
-};
-static const struct afb_evt_itf evt_itf_v2 = {
-       .broadcast = svc_on_event_v2,
-       .push = svc_on_event_v2
+static const struct afb_evt_itf evt_itf = {
+       .broadcast = svc_on_event,
+       .push = svc_on_event
 };
 
 /* functions for requests of services */
@@ -106,12 +106,7 @@ const struct afb_xreq_query_itf afb_svc_xreq_itf = {
 /* the common session for services sharing their session */
 static struct afb_session *common_session;
 
-static inline struct afb_service to_afb_service_v1(struct afb_svc *svc)
-{
-       return (struct afb_service){ .itf = &service_itf, .closure = svc };
-}
-
-static inline struct afb_service to_afb_service_v2(struct afb_svc *svc)
+static inline struct afb_service to_afb_service(struct afb_svc *svc)
 {
        return (struct afb_service){ .itf = &service_itf, .closure = svc };
 }
@@ -192,14 +187,14 @@ struct afb_svc *afb_svc_create_v1(
 
        /* initialises the listener if needed */
        if (on_event) {
-               svc->on_event_v1 = on_event;
-               svc->listener = afb_evt_listener_create(&evt_itf_v1, svc);
+               svc->on_event = on_event;
+               svc->listener = afb_evt_listener_create(&evt_itf, svc);
                if (svc->listener == NULL)
                        goto error;
        }
 
        /* initialises the svc now */
-       rc = start(to_afb_service_v1(svc));
+       rc = start(to_afb_service(svc));
        if (rc < 0)
                goto error;
 
@@ -216,9 +211,9 @@ error:
 struct afb_svc *afb_svc_create_v2(
                        struct afb_apiset *apiset,
                        int share_session,
-                       int (*start)(struct afb_service service),
-                       void (*on_event)(struct afb_service service, const char *event, struct json_object *object),
-                       struct afb_ditf *ditf
+                       int (*start)(),
+                       void (*on_event)(const char *event, struct json_object *object),
+                       struct afb_binding_data_v2 *data
 )
 {
        int rc;
@@ -228,20 +223,22 @@ struct afb_svc *afb_svc_create_v2(
        svc = afb_svc_alloc(apiset, share_session);
        if (svc == NULL)
                goto error;
-       svc->ditf = ditf;
+       data->service = to_afb_service(svc);
 
        /* initialises the listener if needed */
        if (on_event) {
-               svc->on_event_v2 = on_event;
-               svc->listener = afb_evt_listener_create(&evt_itf_v2, svc);
+               svc->on_event = on_event;
+               svc->listener = afb_evt_listener_create(&evt_itf, svc);
                if (svc->listener == NULL)
                        goto error;
        }
 
-       /* initialises the svc now */
-       rc = start(to_afb_service_v2(svc));
-       if (rc < 0)
-               goto error;
+       /* starts the svc if needed */
+       if (start) {
+               rc = start();
+               if (rc < 0)
+                       goto error;
+       }
 
        return svc;
 
@@ -253,21 +250,93 @@ error:
 /*
  * Propagates the event to the service
  */
-static void svc_on_event_v1(void *closure, const char *event, int eventid, struct json_object *object)
+static void svc_on_event(void *closure, const char *event, int eventid, struct json_object *object)
 {
        struct afb_svc *svc = closure;
-       svc->on_event_v1(event, object);
+       svc->on_event(event, object);
        json_object_put(object);
 }
 
 /*
- * Propagates the event to the service
+ * create an svc_req
  */
-static void svc_on_event_v2(void *closure, const char *event, int eventid, struct json_object *object)
+static struct svc_req *svcreq_create(struct afb_svc *svc, const char *api, const char *verb, struct json_object *args)
 {
-       struct afb_svc *svc = closure;
-       svc->on_event_v2(to_afb_service_v2(svc), event, object);
-       json_object_put(object);
+       struct svc_req *svcreq;
+       size_t lenapi, lenverb;
+       char *copy;
+
+       /* allocates the request */
+       lenapi = 1 + strlen(api);
+       lenverb = 1 + strlen(verb);
+       svcreq = malloc(lenapi + lenverb + sizeof *svcreq);
+       if (svcreq != NULL) {
+               /* initialises the request */
+               afb_xreq_init(&svcreq->xreq, &afb_svc_xreq_itf);
+               afb_context_init(&svcreq->xreq.context, svc->session, NULL);
+               svcreq->xreq.context.validated = 1;
+               svcreq->xreq.cred = afb_cred_current();
+               copy = (char*)&svcreq[1];
+               memcpy(copy, api, lenapi);
+               svcreq->xreq.api = copy;
+               copy = &copy[lenapi];
+               memcpy(copy, verb, lenverb);
+               svcreq->xreq.verb = copy;
+               svcreq->xreq.listener = svc->listener;
+               svcreq->xreq.json = args;
+               svcreq->svc = svc;
+       }
+       return svcreq;
+}
+
+/*
+ * destroys the svc_req
+ */
+static void svcreq_destroy(struct afb_xreq *xreq)
+{
+       struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
+
+       afb_context_disconnect(&svcreq->xreq.context);
+       json_object_put(svcreq->xreq.json);
+       afb_cred_unref(svcreq->xreq.cred);
+       free(svcreq);
+}
+
+static void svcreq_sync_leave(struct svc_req *svcreq)
+{
+       struct jobloop *jobloop = svcreq->jobloop;
+
+       if (jobloop) {
+               svcreq->jobloop = NULL;
+               jobs_leave(jobloop);
+       }
+}
+
+static void svcreq_reply(struct afb_xreq *xreq, int iserror, json_object *obj)
+{
+       struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
+       if (svcreq->callback) {
+               svcreq->callback(svcreq->closure, iserror, obj);
+               json_object_put(obj);
+       } else {
+               svcreq->iserror = iserror;
+               svcreq->result = obj;
+               svcreq_sync_leave(svcreq);
+       }
+}
+
+static void svcreq_sync_enter(int signum, void *closure, struct jobloop *jobloop)
+{
+       struct svc_req *svcreq = closure;
+
+       if (!signum) {
+               svcreq->jobloop = jobloop;
+               afb_xreq_process(&svcreq->xreq, svcreq->svc->apiset);
+       } else {
+               svcreq->result = afb_msg_json_internal_error();
+               svcreq->iserror = 1;
+               svcreq_sync_leave(svcreq);
+       }
 }
 
 /*
@@ -277,25 +346,21 @@ static void svc_call(void *closure, const char *api, const char *verb, struct js
 {
        struct afb_svc *svc = closure;
        struct svc_req *svcreq;
+       struct json_object *ierr;
 
        /* allocates the request */
-       svcreq = calloc(1, sizeof *svcreq);
+       svcreq = svcreq_create(svc, api, verb, args);
        if (svcreq == NULL) {
                ERROR("out of memory");
                json_object_put(args);
-               callback(cbclosure, 1, afb_msg_json_internal_error());
+               ierr = afb_msg_json_internal_error();
+               callback(cbclosure, 1, ierr);
+               json_object_put(ierr);
                return;
        }
 
        /* initialises the request */
-       afb_xreq_init(&svcreq->xreq, &afb_svc_xreq_itf);
-       afb_context_init(&svcreq->xreq.context, svc->session, NULL);
-       svcreq->xreq.context.validated = 1;
-       svcreq->xreq.cred = afb_cred_current();
-       svcreq->xreq.api = api;
-       svcreq->xreq.verb = verb;
-       svcreq->xreq.listener = svc->listener;
-       svcreq->xreq.json = args;
+       svcreq->jobloop = NULL;
        svcreq->callback = callback;
        svcreq->closure = cbclosure;
 
@@ -303,19 +368,33 @@ static void svc_call(void *closure, const char *api, const char *verb, struct js
        afb_xreq_process(&svcreq->xreq, svc->apiset);
 }
 
-static void svcreq_destroy(struct afb_xreq *xreq)
+static int svc_call_sync(void *closure, const char *api, const char *verb, struct json_object *args,
+                               struct json_object **result)
 {
-       struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
-       afb_context_disconnect(&svcreq->xreq.context);
-       json_object_put(svcreq->xreq.json);
-       afb_cred_unref(svcreq->xreq.cred);
-       free(svcreq);
-}
+       struct afb_svc *svc = closure;
+       struct svc_req *svcreq;
+       int rc;
 
-static void svcreq_reply(struct afb_xreq *xreq, int iserror, json_object *obj)
-{
-       struct svc_req *svcreq = CONTAINER_OF_XREQ(struct svc_req, xreq);
-       svcreq->callback(svcreq->closure, iserror, obj);
-       json_object_put(obj);
+       /* allocates the request */
+       svcreq = svcreq_create(svc, api, verb, args);
+       if (svcreq == NULL) {
+               ERROR("out of memory");
+               errno = ENOMEM;
+               json_object_put(args);
+               *result = afb_msg_json_internal_error();
+               return -1;
+       }
+
+       /* initialises the request */
+       svcreq->jobloop = NULL;
+       svcreq->callback = NULL;
+       svcreq->result = NULL;
+       svcreq->iserror = 1;
+       afb_xreq_addref(&svcreq->xreq);
+       rc = jobs_enter(NULL, 0, svcreq_sync_enter, svcreq);
+       rc = rc >= 0 && !svcreq->iserror;
+       *result = (rc || svcreq->result) ? svcreq->result : afb_msg_json_internal_error();
+       afb_xreq_unref(&svcreq->xreq);
+       return rc;
 }