2 * Copyright (C) 2016, 2017 "IoT.bzh"
3 * Author José Bollo <jose.bollo@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
29 #include <json-c/json.h>
31 #include <afb/afb-req.h>
32 #include <afb/afb-event.h>
34 #include "afb-context.h"
36 #include "afb-session.h"
39 #include "afb-export.h"
44 * Definition of a hook for xreq
46 struct afb_hook_xreq {
47 struct afb_hook_xreq *next; /**< next hook */
48 unsigned refcount; /**< reference count */
49 char *api; /**< api hooked or NULL for any */
50 char *verb; /**< verb hooked or NULL for any */
51 struct afb_session *session; /**< session hooked or NULL if any */
52 unsigned flags; /**< hook flags */
53 struct afb_hook_xreq_itf *itf; /**< interface of hook */
54 void *closure; /**< closure for callbacks */
58 * Definition of a hook for export
60 struct afb_hook_ditf {
61 struct afb_hook_ditf *next; /**< next hook */
62 unsigned refcount; /**< reference count */
63 char *api; /**< api hooked or NULL for any */
64 unsigned flags; /**< hook flags */
65 struct afb_hook_ditf_itf *itf; /**< interface of hook */
66 void *closure; /**< closure for callbacks */
70 * Definition of a hook for export
73 struct afb_hook_svc *next; /**< next hook */
74 unsigned refcount; /**< reference count */
75 char *api; /**< api hooked or NULL for any */
76 unsigned flags; /**< hook flags */
77 struct afb_hook_svc_itf *itf; /**< interface of hook */
78 void *closure; /**< closure for callbacks */
82 * Definition of a hook for evt
85 struct afb_hook_evt *next; /**< next hook */
86 unsigned refcount; /**< reference count */
87 char *pattern; /**< event pattern name hooked or NULL for any */
88 unsigned flags; /**< hook flags */
89 struct afb_hook_evt_itf *itf; /**< interface of hook */
90 void *closure; /**< closure for callbacks */
94 * Definition of a hook for global
96 struct afb_hook_global {
97 struct afb_hook_global *next; /**< next hook */
98 unsigned refcount; /**< reference count */
99 unsigned flags; /**< hook flags */
100 struct afb_hook_global_itf *itf; /**< interface of hook */
101 void *closure; /**< closure for callbacks */
104 /* synchronisation across threads */
105 static pthread_rwlock_t rwlock = PTHREAD_RWLOCK_INITIALIZER;
107 /* list of hooks for xreq */
108 static struct afb_hook_xreq *list_of_xreq_hooks = NULL;
110 /* list of hooks for export */
111 static struct afb_hook_ditf *list_of_ditf_hooks = NULL;
113 /* list of hooks for export */
114 static struct afb_hook_svc *list_of_svc_hooks = NULL;
116 /* list of hooks for evt */
117 static struct afb_hook_evt *list_of_evt_hooks = NULL;
119 /* list of hooks for global */
120 static struct afb_hook_global *list_of_global_hooks = NULL;
123 static unsigned next_hookid = 0;
125 /******************************************************************************
127 *****************************************************************************/
128 static void init_hookid(struct afb_hookid *hookid)
130 hookid->id = __atomic_add_fetch(&next_hookid, 1, __ATOMIC_RELAXED);
131 clock_gettime(CLOCK_MONOTONIC, &hookid->time);
134 /******************************************************************************
135 * section: default callbacks for tracing requests
136 *****************************************************************************/
138 static char *_pbuf_(const char *fmt, va_list args, char **palloc, char *sbuf, size_t szsbuf, size_t *outlen)
145 rc = vsnprintf(sbuf, szsbuf, fmt, args);
146 if ((size_t)rc >= szsbuf) {
148 sbuf[szsbuf-2] = sbuf[szsbuf-3] = sbuf[szsbuf-4] = '.';
149 rc = vasprintf(palloc, fmt, cp);
154 if (rc >= 0 && outlen)
155 *outlen = (size_t)rc;
159 #if 0 /* old behaviour: use NOTICE */
160 static void _hook_(const char *fmt1, const char *fmt2, va_list arg2, ...)
162 char *tag, *data, *mem1, *mem2, buf1[256], buf2[2000];
165 data = _pbuf_(fmt2, arg2, &mem2, buf2, sizeof buf2, NULL);
167 va_start(arg1, arg2);
168 tag = _pbuf_(fmt1, arg1, &mem1, buf1, sizeof buf1, NULL);
171 NOTICE("[HOOK %s] %s", tag, data);
176 #else /* new behaviour: emits directly to stderr */
177 static void _hook_(const char *fmt1, const char *fmt2, va_list arg2, ...)
179 static const char chars[] = "HOOK: [] \n";
180 char *mem1, *mem2, buf1[256], buf2[2000];
184 iov[0].iov_base = (void*)&chars[0];
187 va_start(arg1, arg2);
188 iov[1].iov_base = _pbuf_(fmt1, arg1, &mem1, buf1, sizeof buf1, &iov[1].iov_len);
191 iov[2].iov_base = (void*)&chars[7];
194 iov[3].iov_base = _pbuf_(fmt2, arg2, &mem2, buf2, sizeof buf2, &iov[3].iov_len);
196 iov[4].iov_base = (void*)&chars[9];
206 static void _hook_xreq_(const struct afb_xreq *xreq, const char *format, ...)
209 va_start(ap, format);
210 _hook_("xreq-%06d:%s/%s", format, ap, xreq->hookindex, xreq->request.api, xreq->request.verb);
214 static void hook_xreq_begin_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
217 _hook_xreq_(xreq, "BEGIN");
219 _hook_xreq_(xreq, "BEGIN uid=%d=%s gid=%d pid=%d label=%s id=%s",
220 (int)xreq->cred->uid,
222 (int)xreq->cred->gid,
223 (int)xreq->cred->pid,
224 xreq->cred->label?:"(null)",
225 xreq->cred->id?:"(null)"
229 static void hook_xreq_end_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
231 _hook_xreq_(xreq, "END");
234 static void hook_xreq_json_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct json_object *obj)
236 _hook_xreq_(xreq, "json() -> %s", json_object_to_json_string(obj));
239 static void hook_xreq_get_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *name, struct afb_arg arg)
241 _hook_xreq_(xreq, "get(%s) -> { name: %s, value: %s, path: %s }", name, arg.name, arg.value, arg.path);
244 static void hook_xreq_success_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct json_object *obj, const char *info)
246 _hook_xreq_(xreq, "success(%s, %s)", json_object_to_json_string(obj), info);
249 static void hook_xreq_fail_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *status, const char *info)
251 _hook_xreq_(xreq, "fail(%s, %s)", status, info);
254 static void hook_xreq_context_get_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, void *value)
256 _hook_xreq_(xreq, "context_get() -> %p", value);
259 static void hook_xreq_context_set_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, void *value, void (*free_value)(void*))
261 _hook_xreq_(xreq, "context_set(%p, %p)", value, free_value);
264 static void hook_xreq_addref_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
266 _hook_xreq_(xreq, "addref()");
269 static void hook_xreq_unref_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
271 _hook_xreq_(xreq, "unref()");
274 static void hook_xreq_session_close_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
276 _hook_xreq_(xreq, "session_close()");
279 static void hook_xreq_session_set_LOA_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, unsigned level, int result)
281 _hook_xreq_(xreq, "session_set_LOA(%u) -> %d", level, result);
284 static void hook_xreq_subscribe_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_eventid *eventid, int result)
286 _hook_xreq_(xreq, "subscribe(%s:%d) -> %d", afb_evt_eventid_fullname(eventid), afb_evt_eventid_id(eventid), result);
289 static void hook_xreq_unsubscribe_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_eventid *eventid, int result)
291 _hook_xreq_(xreq, "unsubscribe(%s:%d) -> %d", afb_evt_eventid_fullname(eventid), afb_evt_eventid_id(eventid), result);
294 static void hook_xreq_subcall_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
296 _hook_xreq_(xreq, "subcall(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
299 static void hook_xreq_subcall_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
301 _hook_xreq_(xreq, " ...subcall... -> %d: %s", status, json_object_to_json_string(result));
304 static void hook_xreq_subcallsync_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
306 _hook_xreq_(xreq, "subcallsync(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
309 static void hook_xreq_subcallsync_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
311 _hook_xreq_(xreq, " ...subcallsync... -> %d: %s", status, json_object_to_json_string(result));
314 static void hook_xreq_vverbose_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
321 len = vasprintf(&msg, fmt, ap);
325 _hook_xreq_(xreq, "vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, func, fmt);
327 _hook_xreq_(xreq, "vverbose(%d, %s, %d, %s) -> %s", level, file, line, func, msg);
332 static void hook_xreq_store_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_stored_req *sreq)
334 _hook_xreq_(xreq, "store() -> %p", sreq);
337 static void hook_xreq_unstore_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
339 _hook_xreq_(xreq, "unstore()");
342 static void hook_xreq_subcall_req_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
344 _hook_xreq_(xreq, "subcall_req(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
347 static void hook_xreq_subcall_req_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
349 _hook_xreq_(xreq, " ...subcall_req... -> %d: %s", status, json_object_to_json_string(result));
352 static void hook_xreq_has_permission_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *permission, int result)
354 _hook_xreq_(xreq, "has_permission(%s) -> %d", permission, result);
357 static void hook_xreq_get_application_id_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, char *result)
359 _hook_xreq_(xreq, "get_application_id() -> %s", result);
362 static void hook_xreq_context_make_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int replace, void *(*create_value)(void*), void (*free_value)(void*), void *create_closure, void *result)
364 _hook_xreq_(xreq, "context_make(replace=%s, %p, %p, %p) -> %p", replace?"yes":"no", create_value, free_value, create_closure, result);
367 static void hook_xreq_get_uid_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int result)
369 _hook_xreq_(xreq, "get_uid() -> %d", result);
372 static struct afb_hook_xreq_itf hook_xreq_default_itf = {
373 .hook_xreq_begin = hook_xreq_begin_default_cb,
374 .hook_xreq_end = hook_xreq_end_default_cb,
375 .hook_xreq_json = hook_xreq_json_default_cb,
376 .hook_xreq_get = hook_xreq_get_default_cb,
377 .hook_xreq_success = hook_xreq_success_default_cb,
378 .hook_xreq_fail = hook_xreq_fail_default_cb,
379 .hook_xreq_context_get = hook_xreq_context_get_default_cb,
380 .hook_xreq_context_set = hook_xreq_context_set_default_cb,
381 .hook_xreq_addref = hook_xreq_addref_default_cb,
382 .hook_xreq_unref = hook_xreq_unref_default_cb,
383 .hook_xreq_session_close = hook_xreq_session_close_default_cb,
384 .hook_xreq_session_set_LOA = hook_xreq_session_set_LOA_default_cb,
385 .hook_xreq_subscribe = hook_xreq_subscribe_default_cb,
386 .hook_xreq_unsubscribe = hook_xreq_unsubscribe_default_cb,
387 .hook_xreq_subcall = hook_xreq_subcall_default_cb,
388 .hook_xreq_subcall_result = hook_xreq_subcall_result_default_cb,
389 .hook_xreq_subcallsync = hook_xreq_subcallsync_default_cb,
390 .hook_xreq_subcallsync_result = hook_xreq_subcallsync_result_default_cb,
391 .hook_xreq_vverbose = hook_xreq_vverbose_default_cb,
392 .hook_xreq_store = hook_xreq_store_default_cb,
393 .hook_xreq_unstore = hook_xreq_unstore_default_cb,
394 .hook_xreq_subcall_req = hook_xreq_subcall_req_default_cb,
395 .hook_xreq_subcall_req_result = hook_xreq_subcall_req_result_default_cb,
396 .hook_xreq_has_permission = hook_xreq_has_permission_default_cb,
397 .hook_xreq_get_application_id = hook_xreq_get_application_id_default_cb,
398 .hook_xreq_context_make = hook_xreq_context_make_default_cb,
399 .hook_xreq_get_uid = hook_xreq_get_uid_default_cb,
402 /******************************************************************************
403 * section: hooks for tracing requests
404 *****************************************************************************/
406 #define _HOOK_XREQ_(what,...) \
407 struct afb_hook_xreq *hook; \
408 struct afb_hookid hookid; \
409 pthread_rwlock_rdlock(&rwlock); \
410 init_hookid(&hookid); \
411 hook = list_of_xreq_hooks; \
413 if (hook->itf->hook_xreq_##what \
414 && (hook->flags & afb_hook_flag_req_##what) != 0 \
415 && (!hook->session || hook->session == xreq->context.session) \
416 && (!hook->api || !strcasecmp(hook->api, xreq->request.api)) \
417 && (!hook->verb || !strcasecmp(hook->verb, xreq->request.verb))) { \
418 hook->itf->hook_xreq_##what(hook->closure, &hookid, __VA_ARGS__); \
422 pthread_rwlock_unlock(&rwlock);
425 void afb_hook_xreq_begin(const struct afb_xreq *xreq)
427 _HOOK_XREQ_(begin, xreq);
430 void afb_hook_xreq_end(const struct afb_xreq *xreq)
432 _HOOK_XREQ_(end, xreq);
435 struct json_object *afb_hook_xreq_json(const struct afb_xreq *xreq, struct json_object *obj)
437 _HOOK_XREQ_(json, xreq, obj);
441 struct afb_arg afb_hook_xreq_get(const struct afb_xreq *xreq, const char *name, struct afb_arg arg)
443 _HOOK_XREQ_(get, xreq, name, arg);
447 void afb_hook_xreq_success(const struct afb_xreq *xreq, struct json_object *obj, const char *info)
449 _HOOK_XREQ_(success, xreq, obj, info);
452 void afb_hook_xreq_fail(const struct afb_xreq *xreq, const char *status, const char *info)
454 _HOOK_XREQ_(fail, xreq, status, info);
457 void *afb_hook_xreq_context_get(const struct afb_xreq *xreq, void *value)
459 _HOOK_XREQ_(context_get, xreq, value);
463 void afb_hook_xreq_context_set(const struct afb_xreq *xreq, void *value, void (*free_value)(void*))
465 _HOOK_XREQ_(context_set, xreq, value, free_value);
468 void afb_hook_xreq_addref(const struct afb_xreq *xreq)
470 _HOOK_XREQ_(addref, xreq);
473 void afb_hook_xreq_unref(const struct afb_xreq *xreq)
475 _HOOK_XREQ_(unref, xreq);
478 void afb_hook_xreq_session_close(const struct afb_xreq *xreq)
480 _HOOK_XREQ_(session_close, xreq);
483 int afb_hook_xreq_session_set_LOA(const struct afb_xreq *xreq, unsigned level, int result)
485 _HOOK_XREQ_(session_set_LOA, xreq, level, result);
489 int afb_hook_xreq_subscribe(const struct afb_xreq *xreq, struct afb_eventid *eventid, int result)
491 _HOOK_XREQ_(subscribe, xreq, eventid, result);
495 int afb_hook_xreq_unsubscribe(const struct afb_xreq *xreq, struct afb_eventid *eventid, int result)
497 _HOOK_XREQ_(unsubscribe, xreq, eventid, result);
501 void afb_hook_xreq_subcall(const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
503 _HOOK_XREQ_(subcall, xreq, api, verb, args);
506 void afb_hook_xreq_subcall_result(const struct afb_xreq *xreq, int status, struct json_object *result)
508 _HOOK_XREQ_(subcall_result, xreq, status, result);
511 void afb_hook_xreq_subcallsync(const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
513 _HOOK_XREQ_(subcallsync, xreq, api, verb, args);
516 int afb_hook_xreq_subcallsync_result(const struct afb_xreq *xreq, int status, struct json_object *result)
518 _HOOK_XREQ_(subcallsync_result, xreq, status, result);
522 void afb_hook_xreq_vverbose(const struct afb_xreq *xreq, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
524 _HOOK_XREQ_(vverbose, xreq, level, file ?: "?", line, func ?: "?", fmt, args);
527 void afb_hook_xreq_store(const struct afb_xreq *xreq, struct afb_stored_req *sreq)
529 _HOOK_XREQ_(store, xreq, sreq);
532 void afb_hook_xreq_unstore(const struct afb_xreq *xreq)
534 _HOOK_XREQ_(unstore, xreq);
537 void afb_hook_xreq_subcall_req(const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
539 _HOOK_XREQ_(subcall_req, xreq, api, verb, args);
542 void afb_hook_xreq_subcall_req_result(const struct afb_xreq *xreq, int status, struct json_object *result)
544 _HOOK_XREQ_(subcall_req_result, xreq, status, result);
547 int afb_hook_xreq_has_permission(const struct afb_xreq *xreq, const char *permission, int result)
549 _HOOK_XREQ_(has_permission, xreq, permission, result);
553 char *afb_hook_xreq_get_application_id(const struct afb_xreq *xreq, char *result)
555 _HOOK_XREQ_(get_application_id, xreq, result);
559 void *afb_hook_xreq_context_make(const struct afb_xreq *xreq, int replace, void *(*create_value)(void*), void (*free_value)(void*), void *create_closure, void *result)
561 _HOOK_XREQ_(context_make, xreq, replace, create_value, free_value, create_closure, result);
565 int afb_hook_xreq_get_uid(const struct afb_xreq *xreq, int result)
567 _HOOK_XREQ_(get_uid, xreq, result);
571 /******************************************************************************
572 * section: hooking xreqs
573 *****************************************************************************/
575 void afb_hook_init_xreq(struct afb_xreq *xreq)
581 struct afb_hook_xreq *hook;
583 /* scan hook list to get the expected flags */
585 pthread_rwlock_rdlock(&rwlock);
586 hook = list_of_xreq_hooks;
588 f = hook->flags & afb_hook_flags_req_all;
590 && (!hook->session || hook->session == xreq->context.session)
591 && (!hook->api || !strcasecmp(hook->api, xreq->request.api))
592 && (!hook->verb || !strcasecmp(hook->verb, xreq->request.verb));
597 pthread_rwlock_unlock(&rwlock);
599 /* store the hooking data */
600 xreq->hookflags = flags;
602 pthread_rwlock_wrlock(&rwlock);
605 xreq->hookindex = reqindex;
606 pthread_rwlock_unlock(&rwlock);
610 struct afb_hook_xreq *afb_hook_create_xreq(const char *api, const char *verb, struct afb_session *session, int flags, struct afb_hook_xreq_itf *itf, void *closure)
612 struct afb_hook_xreq *hook;
614 /* alloc the result */
615 hook = calloc(1, sizeof *hook);
619 /* get a copy of the names */
620 hook->api = api ? strdup(api) : NULL;
621 hook->verb = verb ? strdup(verb) : NULL;
622 if ((api && !hook->api) || (verb && !hook->verb)) {
629 /* initialise the rest */
630 hook->session = session;
632 afb_session_addref(session);
635 hook->itf = itf ? itf : &hook_xreq_default_itf;
636 hook->closure = closure;
638 /* record the hook */
639 pthread_rwlock_wrlock(&rwlock);
640 hook->next = list_of_xreq_hooks;
641 list_of_xreq_hooks = hook;
642 pthread_rwlock_unlock(&rwlock);
648 struct afb_hook_xreq *afb_hook_addref_xreq(struct afb_hook_xreq *hook)
650 pthread_rwlock_wrlock(&rwlock);
652 pthread_rwlock_unlock(&rwlock);
656 void afb_hook_unref_xreq(struct afb_hook_xreq *hook)
658 struct afb_hook_xreq **prv;
661 pthread_rwlock_wrlock(&rwlock);
662 if (--hook->refcount)
666 prv = &list_of_xreq_hooks;
667 while (*prv && *prv != hook)
672 pthread_rwlock_unlock(&rwlock);
678 afb_session_unref(hook->session);
684 /******************************************************************************
685 * section: default callbacks for tracing daemon interface
686 *****************************************************************************/
688 static void _hook_ditf_(const struct afb_export *export, const char *format, ...)
691 va_start(ap, format);
692 _hook_("export-%s", format, ap, afb_export_apiname(export));
696 static void hook_ditf_event_broadcast_before_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct json_object *object)
698 _hook_ditf_(export, "event_broadcast.before(%s, %s)....", name, json_object_to_json_string(object));
701 static void hook_ditf_event_broadcast_after_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct json_object *object, int result)
703 _hook_ditf_(export, "event_broadcast.after(%s, %s) -> %d", name, json_object_to_json_string(object), result);
706 static void hook_ditf_get_event_loop_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_event *result)
708 _hook_ditf_(export, "get_event_loop() -> %p", result);
711 static void hook_ditf_get_user_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result)
713 _hook_ditf_(export, "get_user_bus() -> %p", result);
716 static void hook_ditf_get_system_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result)
718 _hook_ditf_(export, "get_system_bus() -> %p", result);
721 static void hook_ditf_vverbose_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
728 len = vasprintf(&msg, fmt, ap);
732 _hook_ditf_(export, "vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, function, fmt);
734 _hook_ditf_(export, "vverbose(%d, %s, %d, %s) -> %s", level, file, line, function, msg);
739 static void hook_ditf_event_make_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct afb_eventid *result)
741 _hook_ditf_(export, "event_make(%s) -> %s:%d", name, afb_evt_eventid_fullname(result), afb_evt_eventid_id(result));
744 static void hook_ditf_rootdir_get_fd_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result)
748 _hook_ditf_(export, "rootdir_get_fd() -> %d, %m", result);
750 sprintf(path, "/proc/self/fd/%d", result);
751 readlink(path, path, sizeof path);
752 _hook_ditf_(export, "rootdir_get_fd() -> %d = %s", result, path);
756 static void hook_ditf_rootdir_open_locale_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *filename, int flags, const char *locale, int result)
762 _hook_ditf_(export, "rootdir_open_locale(%s, %d, %s) -> %d, %m", filename, flags, locale, result);
764 sprintf(path, "/proc/self/fd/%d", result);
765 readlink(path, path, sizeof path);
766 _hook_ditf_(export, "rootdir_open_locale(%s, %d, %s) -> %d = %s", filename, flags, locale, result, path);
770 static void hook_ditf_queue_job_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
772 _hook_ditf_(export, "queue_job(%p, %p, %p, %d) -> %d", callback, argument, group, timeout, result);
775 static void hook_ditf_unstore_req_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct afb_stored_req *sreq)
777 _hook_ditf_(export, "unstore_req(%p)", sreq);
780 static void hook_ditf_require_api_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, int initialized)
782 _hook_ditf_(export, "require_api(%s, %d)...", name, initialized);
785 static void hook_ditf_require_api_result_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, int initialized, int result)
787 _hook_ditf_(export, "...require_api(%s, %d) -> %d", name, initialized, result);
790 static void hook_ditf_rename_api_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *oldname, const char *newname, int result)
792 _hook_ditf_(export, "rename_api(%s -> %s) -> %d", oldname, newname, result);
795 static struct afb_hook_ditf_itf hook_ditf_default_itf = {
796 .hook_ditf_event_broadcast_before = hook_ditf_event_broadcast_before_cb,
797 .hook_ditf_event_broadcast_after = hook_ditf_event_broadcast_after_cb,
798 .hook_ditf_get_event_loop = hook_ditf_get_event_loop_cb,
799 .hook_ditf_get_user_bus = hook_ditf_get_user_bus_cb,
800 .hook_ditf_get_system_bus = hook_ditf_get_system_bus_cb,
801 .hook_ditf_vverbose = hook_ditf_vverbose_cb,
802 .hook_ditf_event_make = hook_ditf_event_make_cb,
803 .hook_ditf_rootdir_get_fd = hook_ditf_rootdir_get_fd_cb,
804 .hook_ditf_rootdir_open_locale = hook_ditf_rootdir_open_locale_cb,
805 .hook_ditf_queue_job = hook_ditf_queue_job_cb,
806 .hook_ditf_unstore_req = hook_ditf_unstore_req_cb,
807 .hook_ditf_require_api = hook_ditf_require_api_cb,
808 .hook_ditf_require_api_result = hook_ditf_require_api_result_cb,
809 .hook_ditf_rename_api = hook_ditf_rename_api_cb
812 /******************************************************************************
813 * section: hooks for tracing daemon interface (export)
814 *****************************************************************************/
816 #define _HOOK_DITF_(what,...) \
817 struct afb_hook_ditf *hook; \
818 struct afb_hookid hookid; \
819 const char *apiname = afb_export_apiname(export); \
820 pthread_rwlock_rdlock(&rwlock); \
821 init_hookid(&hookid); \
822 hook = list_of_ditf_hooks; \
824 if (hook->itf->hook_ditf_##what \
825 && (hook->flags & afb_hook_flag_ditf_##what) != 0 \
826 && (!hook->api || !strcasecmp(hook->api, apiname))) { \
827 hook->itf->hook_ditf_##what(hook->closure, &hookid, __VA_ARGS__); \
831 pthread_rwlock_unlock(&rwlock);
833 void afb_hook_ditf_event_broadcast_before(const struct afb_export *export, const char *name, struct json_object *object)
835 _HOOK_DITF_(event_broadcast_before, export, name, object);
838 int afb_hook_ditf_event_broadcast_after(const struct afb_export *export, const char *name, struct json_object *object, int result)
840 _HOOK_DITF_(event_broadcast_after, export, name, object, result);
844 struct sd_event *afb_hook_ditf_get_event_loop(const struct afb_export *export, struct sd_event *result)
846 _HOOK_DITF_(get_event_loop, export, result);
850 struct sd_bus *afb_hook_ditf_get_user_bus(const struct afb_export *export, struct sd_bus *result)
852 _HOOK_DITF_(get_user_bus, export, result);
856 struct sd_bus *afb_hook_ditf_get_system_bus(const struct afb_export *export, struct sd_bus *result)
858 _HOOK_DITF_(get_system_bus, export, result);
862 void afb_hook_ditf_vverbose(const struct afb_export *export, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
864 _HOOK_DITF_(vverbose, export, level, file, line, function, fmt, args);
867 struct afb_eventid *afb_hook_ditf_event_make(const struct afb_export *export, const char *name, struct afb_eventid *result)
869 _HOOK_DITF_(event_make, export, name, result);
873 int afb_hook_ditf_rootdir_get_fd(const struct afb_export *export, int result)
875 _HOOK_DITF_(rootdir_get_fd, export, result);
879 int afb_hook_ditf_rootdir_open_locale(const struct afb_export *export, const char *filename, int flags, const char *locale, int result)
881 _HOOK_DITF_(rootdir_open_locale, export, filename, flags, locale, result);
885 int afb_hook_ditf_queue_job(const struct afb_export *export, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
887 _HOOK_DITF_(queue_job, export, callback, argument, group, timeout, result);
891 void afb_hook_ditf_unstore_req(const struct afb_export *export, struct afb_stored_req *sreq)
893 _HOOK_DITF_(unstore_req, export, sreq);
896 void afb_hook_ditf_require_api(const struct afb_export *export, const char *name, int initialized)
898 _HOOK_DITF_(require_api, export, name, initialized);
901 int afb_hook_ditf_require_api_result(const struct afb_export *export, const char *name, int initialized, int result)
903 _HOOK_DITF_(require_api_result, export, name, initialized, result);
907 int afb_hook_ditf_rename_api(const struct afb_export *export, const char *oldname, const char *newname, int result)
909 _HOOK_DITF_(rename_api, export, oldname, newname, result);
913 /******************************************************************************
914 * section: hooking export
915 *****************************************************************************/
917 int afb_hook_flags_ditf(const char *api)
920 struct afb_hook_ditf *hook;
922 pthread_rwlock_rdlock(&rwlock);
924 hook = list_of_ditf_hooks;
926 if (!api || !hook->api || !strcasecmp(hook->api, api))
927 flags |= hook->flags;
930 pthread_rwlock_unlock(&rwlock);
934 struct afb_hook_ditf *afb_hook_create_ditf(const char *api, int flags, struct afb_hook_ditf_itf *itf, void *closure)
936 struct afb_hook_ditf *hook;
938 /* alloc the result */
939 hook = calloc(1, sizeof *hook);
943 /* get a copy of the names */
944 hook->api = api ? strdup(api) : NULL;
945 if (api && !hook->api) {
950 /* initialise the rest */
953 hook->itf = itf ? itf : &hook_ditf_default_itf;
954 hook->closure = closure;
956 /* record the hook */
957 pthread_rwlock_wrlock(&rwlock);
958 hook->next = list_of_ditf_hooks;
959 list_of_ditf_hooks = hook;
960 pthread_rwlock_unlock(&rwlock);
966 struct afb_hook_ditf *afb_hook_addref_ditf(struct afb_hook_ditf *hook)
968 pthread_rwlock_wrlock(&rwlock);
970 pthread_rwlock_unlock(&rwlock);
974 void afb_hook_unref_ditf(struct afb_hook_ditf *hook)
976 struct afb_hook_ditf **prv;
979 pthread_rwlock_wrlock(&rwlock);
980 if (--hook->refcount)
984 prv = &list_of_ditf_hooks;
985 while (*prv && *prv != hook)
990 pthread_rwlock_unlock(&rwlock);
999 /******************************************************************************
1000 * section: default callbacks for tracing service interface (export)
1001 *****************************************************************************/
1003 static void _hook_svc_(const struct afb_export *export, const char *format, ...)
1006 va_start(ap, format);
1007 _hook_("export-%s", format, ap, afb_export_apiname(export));
1011 static void hook_svc_start_before_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export)
1013 _hook_svc_(export, "start.before");
1016 static void hook_svc_start_after_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status)
1018 _hook_svc_(export, "start.after -> %d", status);
1021 static void hook_svc_on_event_before_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1023 _hook_svc_(export, "on_event.before(%s, %d, %s)", event, eventid, json_object_to_json_string(object));
1026 static void hook_svc_on_event_after_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1028 _hook_svc_(export, "on_event.after(%s, %d, %s)", event, eventid, json_object_to_json_string(object));
1031 static void hook_svc_call_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1033 _hook_svc_(export, "call(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
1036 static void hook_svc_call_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status, struct json_object *result)
1038 _hook_svc_(export, " ...call... -> %d: %s", status, json_object_to_json_string(result));
1041 static void hook_svc_callsync_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1043 _hook_svc_(export, "callsync(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
1046 static void hook_svc_callsync_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status, struct json_object *result)
1048 _hook_svc_(export, " ...callsync... -> %d: %s", status, json_object_to_json_string(result));
1051 static struct afb_hook_svc_itf hook_svc_default_itf = {
1052 .hook_svc_start_before = hook_svc_start_before_default_cb,
1053 .hook_svc_start_after = hook_svc_start_after_default_cb,
1054 .hook_svc_on_event_before = hook_svc_on_event_before_default_cb,
1055 .hook_svc_on_event_after = hook_svc_on_event_after_default_cb,
1056 .hook_svc_call = hook_svc_call_default_cb,
1057 .hook_svc_call_result = hook_svc_call_result_default_cb,
1058 .hook_svc_callsync = hook_svc_callsync_default_cb,
1059 .hook_svc_callsync_result = hook_svc_callsync_result_default_cb
1062 /******************************************************************************
1063 * section: hooks for tracing service interface (export)
1064 *****************************************************************************/
1066 #define _HOOK_SVC_(what,...) \
1067 struct afb_hook_svc *hook; \
1068 struct afb_hookid hookid; \
1069 const char *apiname = afb_export_apiname(export); \
1070 pthread_rwlock_rdlock(&rwlock); \
1071 init_hookid(&hookid); \
1072 hook = list_of_svc_hooks; \
1074 if (hook->itf->hook_svc_##what \
1075 && (hook->flags & afb_hook_flag_svc_##what) != 0 \
1076 && (!hook->api || !strcasecmp(hook->api, apiname))) { \
1077 hook->itf->hook_svc_##what(hook->closure, &hookid, __VA_ARGS__); \
1079 hook = hook->next; \
1081 pthread_rwlock_unlock(&rwlock);
1083 void afb_hook_svc_start_before(const struct afb_export *export)
1085 _HOOK_SVC_(start_before, export);
1088 int afb_hook_svc_start_after(const struct afb_export *export, int status)
1090 _HOOK_SVC_(start_after, export, status);
1094 void afb_hook_svc_on_event_before(const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1096 _HOOK_SVC_(on_event_before, export, event, eventid, object);
1099 void afb_hook_svc_on_event_after(const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1101 _HOOK_SVC_(on_event_after, export, event, eventid, object);
1104 void afb_hook_svc_call(const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1106 _HOOK_SVC_(call, export, api, verb, args);
1109 void afb_hook_svc_call_result(const struct afb_export *export, int status, struct json_object *result)
1111 _HOOK_SVC_(call_result, export, status, result);
1114 void afb_hook_svc_callsync(const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1116 _HOOK_SVC_(callsync, export, api, verb, args);
1119 int afb_hook_svc_callsync_result(const struct afb_export *export, int status, struct json_object *result)
1121 _HOOK_SVC_(callsync_result, export, status, result);
1125 /******************************************************************************
1126 * section: hooking services (export)
1127 *****************************************************************************/
1129 int afb_hook_flags_svc(const char *api)
1132 struct afb_hook_svc *hook;
1134 pthread_rwlock_rdlock(&rwlock);
1136 hook = list_of_svc_hooks;
1138 if (!api || !hook->api || !strcasecmp(hook->api, api))
1139 flags |= hook->flags;
1142 pthread_rwlock_unlock(&rwlock);
1146 struct afb_hook_svc *afb_hook_create_svc(const char *api, int flags, struct afb_hook_svc_itf *itf, void *closure)
1148 struct afb_hook_svc *hook;
1150 /* alloc the result */
1151 hook = calloc(1, sizeof *hook);
1155 /* get a copy of the names */
1156 hook->api = api ? strdup(api) : NULL;
1157 if (api && !hook->api) {
1162 /* initialise the rest */
1164 hook->flags = flags;
1165 hook->itf = itf ? itf : &hook_svc_default_itf;
1166 hook->closure = closure;
1168 /* record the hook */
1169 pthread_rwlock_wrlock(&rwlock);
1170 hook->next = list_of_svc_hooks;
1171 list_of_svc_hooks = hook;
1172 pthread_rwlock_unlock(&rwlock);
1178 struct afb_hook_svc *afb_hook_addref_svc(struct afb_hook_svc *hook)
1180 pthread_rwlock_wrlock(&rwlock);
1182 pthread_rwlock_unlock(&rwlock);
1186 void afb_hook_unref_svc(struct afb_hook_svc *hook)
1188 struct afb_hook_svc **prv;
1191 pthread_rwlock_wrlock(&rwlock);
1192 if (--hook->refcount)
1196 prv = &list_of_svc_hooks;
1197 while (*prv && *prv != hook)
1198 prv = &(*prv)->next;
1202 pthread_rwlock_unlock(&rwlock);
1211 /******************************************************************************
1212 * section: default callbacks for tracing service interface (evt)
1213 *****************************************************************************/
1215 static void _hook_evt_(const char *evt, int id, const char *format, ...)
1218 va_start(ap, format);
1219 _hook_("evt-%s:%d", format, ap, evt, id);
1223 static void hook_evt_create_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
1225 _hook_evt_(evt, id, "create");
1228 static void hook_evt_push_before_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
1230 _hook_evt_(evt, id, "push.before(%s)", json_object_to_json_string(obj));
1234 static void hook_evt_push_after_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
1236 _hook_evt_(evt, id, "push.after(%s) -> %d", json_object_to_json_string(obj), result);
1239 static void hook_evt_broadcast_before_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
1241 _hook_evt_(evt, id, "broadcast.before(%s)", json_object_to_json_string(obj));
1244 static void hook_evt_broadcast_after_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
1246 _hook_evt_(evt, id, "broadcast.after(%s) -> %d", json_object_to_json_string(obj), result);
1249 static void hook_evt_name_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, const char *result)
1251 _hook_evt_(evt, id, "name -> %s", result);
1254 static void hook_evt_addref_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
1256 _hook_evt_(evt, id, "addref");
1259 static void hook_evt_unref_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
1261 _hook_evt_(evt, id, "unref");
1264 static struct afb_hook_evt_itf hook_evt_default_itf = {
1265 .hook_evt_create = hook_evt_create_default_cb,
1266 .hook_evt_push_before = hook_evt_push_before_default_cb,
1267 .hook_evt_push_after = hook_evt_push_after_default_cb,
1268 .hook_evt_broadcast_before = hook_evt_broadcast_before_default_cb,
1269 .hook_evt_broadcast_after = hook_evt_broadcast_after_default_cb,
1270 .hook_evt_name = hook_evt_name_default_cb,
1271 .hook_evt_addref = hook_evt_addref_default_cb,
1272 .hook_evt_unref = hook_evt_unref_default_cb
1275 /******************************************************************************
1276 * section: hooks for tracing events interface (evt)
1277 *****************************************************************************/
1279 #define _HOOK_EVT_(what,...) \
1280 struct afb_hook_evt *hook; \
1281 struct afb_hookid hookid; \
1282 pthread_rwlock_rdlock(&rwlock); \
1283 init_hookid(&hookid); \
1284 hook = list_of_evt_hooks; \
1286 if (hook->itf->hook_evt_##what \
1287 && (hook->flags & afb_hook_flag_evt_##what) != 0 \
1288 && (!hook->pattern || !fnmatch(hook->pattern, evt, FNM_CASEFOLD))) { \
1289 hook->itf->hook_evt_##what(hook->closure, &hookid, __VA_ARGS__); \
1291 hook = hook->next; \
1293 pthread_rwlock_unlock(&rwlock);
1295 void afb_hook_evt_create(const char *evt, int id)
1297 _HOOK_EVT_(create, evt, id);
1300 void afb_hook_evt_push_before(const char *evt, int id, struct json_object *obj)
1302 _HOOK_EVT_(push_before, evt, id, obj);
1305 int afb_hook_evt_push_after(const char *evt, int id, struct json_object *obj, int result)
1307 _HOOK_EVT_(push_after, evt, id, obj, result);
1311 void afb_hook_evt_broadcast_before(const char *evt, int id, struct json_object *obj)
1313 _HOOK_EVT_(broadcast_before, evt, id, obj);
1316 int afb_hook_evt_broadcast_after(const char *evt, int id, struct json_object *obj, int result)
1318 _HOOK_EVT_(broadcast_after, evt, id, obj, result);
1322 void afb_hook_evt_name(const char *evt, int id, const char *result)
1324 _HOOK_EVT_(name, evt, id, result);
1327 void afb_hook_evt_addref(const char *evt, int id)
1329 _HOOK_EVT_(addref, evt, id);
1332 void afb_hook_evt_unref(const char *evt, int id)
1334 _HOOK_EVT_(unref, evt, id);
1337 /******************************************************************************
1338 * section: hooking services (evt)
1339 *****************************************************************************/
1341 int afb_hook_flags_evt(const char *name)
1344 struct afb_hook_evt *hook;
1346 pthread_rwlock_rdlock(&rwlock);
1348 hook = list_of_evt_hooks;
1350 if (!name || !hook->pattern || !fnmatch(hook->pattern, name, FNM_CASEFOLD))
1351 flags |= hook->flags;
1354 pthread_rwlock_unlock(&rwlock);
1358 struct afb_hook_evt *afb_hook_create_evt(const char *pattern, int flags, struct afb_hook_evt_itf *itf, void *closure)
1360 struct afb_hook_evt *hook;
1362 /* alloc the result */
1363 hook = calloc(1, sizeof *hook);
1367 /* get a copy of the names */
1368 hook->pattern = pattern ? strdup(pattern) : NULL;
1369 if (pattern && !hook->pattern) {
1374 /* initialise the rest */
1376 hook->flags = flags;
1377 hook->itf = itf ? itf : &hook_evt_default_itf;
1378 hook->closure = closure;
1380 /* record the hook */
1381 pthread_rwlock_wrlock(&rwlock);
1382 hook->next = list_of_evt_hooks;
1383 list_of_evt_hooks = hook;
1384 pthread_rwlock_unlock(&rwlock);
1390 struct afb_hook_evt *afb_hook_addref_evt(struct afb_hook_evt *hook)
1392 pthread_rwlock_wrlock(&rwlock);
1394 pthread_rwlock_unlock(&rwlock);
1398 void afb_hook_unref_evt(struct afb_hook_evt *hook)
1400 struct afb_hook_evt **prv;
1403 pthread_rwlock_wrlock(&rwlock);
1404 if (--hook->refcount)
1408 prv = &list_of_evt_hooks;
1409 while (*prv && *prv != hook)
1410 prv = &(*prv)->next;
1414 pthread_rwlock_unlock(&rwlock);
1417 free(hook->pattern);
1423 /******************************************************************************
1424 * section: default callbacks for globals (global)
1425 *****************************************************************************/
1427 static void _hook_global_(const char *format, ...)
1430 va_start(ap, format);
1431 _hook_("global", format, ap);
1435 static void hook_global_vverbose_default_cb(void *closure, const struct afb_hookid *hookid, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
1442 len = vasprintf(&msg, fmt, ap);
1446 _hook_global_("vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, func, fmt);
1448 _hook_global_("vverbose(%d, %s, %d, %s) -> %s", level, file, line, func, msg);
1453 static struct afb_hook_global_itf hook_global_default_itf = {
1454 .hook_global_vverbose = hook_global_vverbose_default_cb
1457 /******************************************************************************
1458 * section: hooks for tracing globals (global)
1459 *****************************************************************************/
1461 #define _HOOK_GLOBAL_(what,...) \
1462 struct afb_hook_global *hook; \
1463 struct afb_hookid hookid; \
1464 pthread_rwlock_rdlock(&rwlock); \
1465 init_hookid(&hookid); \
1466 hook = list_of_global_hooks; \
1468 if (hook->itf->hook_global_##what \
1469 && (hook->flags & afb_hook_flag_global_##what) != 0) { \
1470 hook->itf->hook_global_##what(hook->closure, &hookid, __VA_ARGS__); \
1472 hook = hook->next; \
1474 pthread_rwlock_unlock(&rwlock);
1476 static void afb_hook_global_vverbose(int level, const char *file, int line, const char *func, const char *fmt, va_list args)
1478 _HOOK_GLOBAL_(vverbose, level, file ?: "?", line, func ?: "?", fmt ?: "", args);
1481 /******************************************************************************
1482 * section: hooking globals (global)
1483 *****************************************************************************/
1485 static void update_global()
1487 struct afb_hook_global *hook;
1490 pthread_rwlock_rdlock(&rwlock);
1491 hook = list_of_global_hooks;
1493 flags = hook->flags;
1496 verbose_observer = (flags & afb_hook_flag_global_vverbose) ? afb_hook_global_vverbose : NULL;
1497 pthread_rwlock_unlock(&rwlock);
1500 struct afb_hook_global *afb_hook_create_global(int flags, struct afb_hook_global_itf *itf, void *closure)
1502 struct afb_hook_global *hook;
1504 /* alloc the result */
1505 hook = calloc(1, sizeof *hook);
1509 /* initialise the rest */
1511 hook->flags = flags;
1512 hook->itf = itf ? itf : &hook_global_default_itf;
1513 hook->closure = closure;
1515 /* record the hook */
1516 pthread_rwlock_wrlock(&rwlock);
1517 hook->next = list_of_global_hooks;
1518 list_of_global_hooks = hook;
1519 pthread_rwlock_unlock(&rwlock);
1521 /* update hooking */
1528 struct afb_hook_global *afb_hook_addref_global(struct afb_hook_global *hook)
1530 pthread_rwlock_wrlock(&rwlock);
1532 pthread_rwlock_unlock(&rwlock);
1536 void afb_hook_unref_global(struct afb_hook_global *hook)
1538 struct afb_hook_global **prv;
1541 pthread_rwlock_wrlock(&rwlock);
1542 if (--hook->refcount)
1546 prv = &list_of_global_hooks;
1547 while (*prv && *prv != hook)
1548 prv = &(*prv)->next;
1552 pthread_rwlock_unlock(&rwlock);
1557 /* update hooking */