/*
* Private structures
*/
+struct callback_func_s
+{
+ void *cf_callback;
+ user_data_t cf_udata;
+};
+typedef struct callback_func_s callback_func_t;
+
#define RF_SIMPLE 0
#define RF_COMPLEX 1
struct read_func_s
{
- int wait_time;
- int wait_left;
- int type;
- union
- {
- int (*cb_simple) (void);
- plugin_read_cb cb_complex;
- } callback;
- enum { DONE = 0, TODO = 1, ACTIVE = 2 } needs_read;
- user_data_t udata;
+ /* `read_func_t' "inherits" from `callback_func_t'.
+ * The `rf_super' member MUST be the first one in this structure! */
+#define rf_callback rf_super.cf_callback
+#define rf_udata rf_super.cf_udata
+ callback_func_t rf_super;
+ int rf_type;
+ int rf_wait_time;
+ int rf_wait_left;
+ enum { DONE = 0, TODO = 1, ACTIVE = 2 } rf_needs_read;
};
typedef struct read_func_s read_func_t;
-struct write_func_s
-{
- plugin_write_cb callback;
- user_data_t udata;
-};
-typedef struct write_func_s write_func_t;
-
-struct flush_func_s
-{
- plugin_flush_cb callback;
- user_data_t udata;
-};
-typedef struct flush_func_s flush_func_t;
-
-struct log_func_s
-{
- plugin_log_cb callback;
- user_data_t udata;
-};
-typedef struct log_func_s log_func_t;
-
/*
* Private variables
*/
return (plugindir);
}
-static int register_callback (llist_t **list, const char *name, void *callback)
+static void destroy_callback (callback_func_t *cf) /* {{{ */
+{
+ if (cf == NULL)
+ return;
+
+ if ((cf->cf_udata.data != NULL) && (cf->cf_udata.free_func != NULL))
+ {
+ cf->cf_udata.free_func (cf->cf_udata.data);
+ cf->cf_udata.data = NULL;
+ cf->cf_udata.free_func = NULL;
+ }
+ sfree (cf);
+} /* }}} void destroy_callback */
+
+static void destroy_all_callbacks (llist_t **list) /* {{{ */
+{
+ llentry_t *le;
+
+ if (*list == NULL)
+ return;
+
+ le = llist_head (*list);
+ while (le != NULL)
+ {
+ llentry_t *le_next;
+
+ le_next = le->next;
+
+ sfree (le->key);
+ destroy_callback (le->value);
+ le->value = NULL;
+
+ le = le_next;
+ }
+
+ llist_destroy (*list);
+ *list = NULL;
+} /* }}} void destroy_all_callbacks */
+
+static int register_callback (llist_t **list, /* {{{ */
+ const char *name, callback_func_t *cf)
{
llentry_t *le;
char *key;
- if ((*list == NULL)
- && ((*list = llist_create ()) == NULL))
+ if (*list == NULL)
+ {
+ *list = llist_create ();
+ if (*list == NULL)
+ {
+ ERROR ("plugin: create_register_callback: "
+ "llist_create failed.");
+ destroy_callback (cf);
+ return (-1);
+ }
+ }
+
+ key = strdup (name);
+ if (key == NULL)
+ {
+ ERROR ("plugin: create_register_callback: strdup failed.");
+ destroy_callback (cf);
return (-1);
+ }
le = llist_search (*list, name);
if (le == NULL)
{
- key = strdup (name);
- if (key == NULL)
- return (-1);
-
- le = llentry_create (key, callback);
+ le = llentry_create (key, cf);
if (le == NULL)
{
+ ERROR ("plugin: create_register_callback: "
+ "llentry_create failed.");
free (key);
+ destroy_callback (cf);
return (-1);
}
}
else
{
- le->value = callback;
+ callback_func_t *old_cf;
+
+ old_cf = le->value;
+ le->value = cf;
+
+ destroy_callback (old_cf);
+ sfree (key);
}
return (0);
-} /* int register_callback */
+} /* }}} int register_callback */
-static void plugin_user_data_destroy (user_data_t *ud)
+static int create_register_callback (llist_t **list, /* {{{ */
+ const char *name, void *callback, user_data_t *ud)
{
- if ((ud != NULL) && (ud->data != NULL) && (ud->free_func != NULL))
+ char *key;
+ callback_func_t *cf;
+
+ cf = (callback_func_t *) malloc (sizeof (*cf));
+ if (cf == NULL)
+ {
+ ERROR ("plugin: create_register_callback: malloc failed.");
+ sfree (key);
+ return (-1);
+ }
+ memset (cf, 0, sizeof (*cf));
+
+ cf->cf_callback = callback;
+ if (ud == NULL)
+ {
+ cf->cf_udata.data = NULL;
+ cf->cf_udata.free_func = NULL;
+ }
+ else
{
- ud->free_func (ud->data);
- ud->data = NULL;
- ud->free_func = NULL;
+ cf->cf_udata = *ud;
}
-} /* void plugin_user_data_destroy */
-static int plugin_unregister (llist_t *list, const char *name)
+ return (register_callback (list, name, cf));
+} /* }}} int create_register_callback */
+
+static int plugin_unregister (llist_t *list, const char *name) /* {{{ */
{
llentry_t *e;
- e = llist_search (list, name);
+ if (list == NULL)
+ return (-1);
+ e = llist_search (list, name);
if (e == NULL)
return (-1);
llist_remove (list, e);
- free (e->key);
+
+ sfree (e->key);
+ destroy_callback (e->value);
+
llentry_destroy (e);
return (0);
-} /* int plugin_unregister */
+} /* }}} int plugin_unregister */
/*
* (Try to) load the shared object `file'. Won't complain if it isn't a shared
{
rf = (read_func_t *) le->value;
- if (rf->needs_read != TODO)
+ if (rf->rf_needs_read != TODO)
{
le = le->next;
continue;
}
/* We will do this read function */
- rf->needs_read = ACTIVE;
+ rf->rf_needs_read = ACTIVE;
DEBUG ("[thread #%5lu] plugin: plugin_read_thread: Handling %s",
(unsigned long int) pthread_self (), le->key);
pthread_mutex_unlock (&read_lock);
- if (rf->type == RF_SIMPLE)
+ if (rf->rf_type == RF_SIMPLE)
{
- status = rf->callback.cb_simple ();
+ int (*callback) (void);
+
+ callback = rf->rf_callback;
+ status = (*callback) ();
}
else
{
- assert (rf->type == RF_COMPLEX);
- status = rf->callback.cb_complex (&rf->udata);
+ plugin_read_cb callback;
+
+ callback = rf->rf_callback;
+ status = (*callback) (&rf->rf_udata);
}
+
done++;
if (status != 0)
{
- if (rf->wait_time < interval_g)
- rf->wait_time = interval_g;
- rf->wait_left = rf->wait_time;
- rf->wait_time = rf->wait_time * 2;
- if (rf->wait_time > 86400)
- rf->wait_time = 86400;
+ if (rf->rf_wait_time < interval_g)
+ rf->rf_wait_time = interval_g;
+ rf->rf_wait_left = rf->rf_wait_time;
+ rf->rf_wait_time = rf->rf_wait_time * 2;
+ if (rf->rf_wait_time > 86400)
+ rf->rf_wait_time = 86400;
NOTICE ("read-function of plugin `%s' "
"failed. Will suspend it for %i "
- "seconds.", le->key, rf->wait_left);
+ "seconds.", le->key, rf->rf_wait_left);
}
else
{
- rf->wait_left = 0;
- rf->wait_time = interval_g;
+ rf->rf_wait_left = 0;
+ rf->rf_wait_time = interval_g;
}
pthread_mutex_lock (&read_lock);
- rf->needs_read = DONE;
+ rf->rf_needs_read = DONE;
le = le->next;
} /* while (le != NULL) */
if (read_threads == NULL)
return;
+ INFO ("collectd: Stopping %i read threads.", read_threads_num);
+
pthread_mutex_lock (&read_lock);
read_loop = 0;
DEBUG ("plugin: stop_read_threads: Signalling `read_cond'");
read_threads_num = 0;
} /* void stop_read_threads */
-static int remove_read_functions (void)
-{
- llentry_t *this;
-
- if (list_read == NULL)
- return (0);
-
- this = llist_head (list_read);
- while (this != NULL)
- {
- llentry_t *next;
- read_func_t *rf;
-
- next = this->next;
- rf = (read_func_t *) this->value;
-
- free (this->key);
-
- plugin_user_data_destroy (&rf->udata);
- free (rf);
-
- this = next;
- }
-
- llist_destroy (list_read);
- list_read = NULL;
-
- return (0);
-} /* }}} int remove_read_functions */
-
/*
* Public functions
*/
int plugin_register_init (const char *name,
int (*callback) (void))
{
- return (register_callback (&list_init, name, (void *) callback));
+ return (create_register_callback (&list_init, name, (void *) callback,
+ /* user_data = */ NULL));
} /* plugin_register_init */
int plugin_register_read (const char *name,
}
memset (rf, 0, sizeof (read_func_t));
- rf->wait_time = interval_g;
- rf->wait_left = 0;
- rf->type = RF_SIMPLE;
- rf->callback.cb_simple = callback;
- rf->needs_read = DONE;
- rf->udata.data = NULL;
- rf->udata.free_func = NULL;
-
- return (register_callback (&list_read, name, (void *) rf));
+ rf->rf_callback = (void *) callback;
+ rf->rf_udata.data = NULL;
+ rf->rf_udata.free_func = NULL;
+ rf->rf_wait_time = interval_g;
+ rf->rf_wait_left = 0;
+ rf->rf_type = RF_SIMPLE;
+ rf->rf_needs_read = DONE;
+
+ return (register_callback (&list_read, name, (callback_func_t *) rf));
} /* int plugin_register_read */
int plugin_register_complex_read (const char *name,
}
memset (rf, 0, sizeof (read_func_t));
- rf->wait_time = interval_g;
- rf->wait_left = 0;
- rf->type = RF_COMPLEX;
- rf->callback.cb_complex = callback;
- rf->needs_read = DONE;
+ rf->rf_callback = (void *) callback;
+ rf->rf_wait_time = interval_g;
+ rf->rf_wait_left = 0;
+ rf->rf_type = RF_COMPLEX;
+ rf->rf_needs_read = DONE;
/* Set user data */
if (user_data == NULL)
{
- rf->udata.data = NULL;
- rf->udata.free_func = NULL;
+ rf->rf_udata.data = NULL;
+ rf->rf_udata.free_func = NULL;
}
else
{
- rf->udata = *user_data;
+ rf->rf_udata = *user_data;
}
- return (register_callback (&list_read, name, (void *) rf));
+ return (register_callback (&list_read, name, (callback_func_t *) rf));
} /* int plugin_register_complex_read */
int plugin_register_write (const char *name,
- plugin_write_cb callback, user_data_t *user_data)
+ plugin_write_cb callback, user_data_t *ud)
{
- write_func_t *wf;
-
- wf = (write_func_t *) malloc (sizeof (*wf));
- if (wf == NULL)
- {
- ERROR ("plugin_register_write: malloc failed.");
- return (-1);
- }
- memset (wf, 0, sizeof (*wf));
-
- wf->callback = callback;
- if (user_data == NULL)
- {
- wf->udata.data = NULL;
- wf->udata.free_func = NULL;
- }
- else
- {
- wf->udata = *user_data;
- }
-
- return (register_callback (&list_write, name, (void *) wf));
+ return (create_register_callback (&list_write, name,
+ (void *) callback, ud));
} /* int plugin_register_write */
int plugin_register_flush (const char *name,
- plugin_flush_cb callback, user_data_t *user_data)
+ plugin_flush_cb callback, user_data_t *ud)
{
- flush_func_t *ff;
-
- ff = (flush_func_t *) malloc (sizeof (*ff));
- if (ff == NULL)
- {
- ERROR ("plugin_register_flush: malloc failed.");
- return (-1);
- }
- memset (ff, 0, sizeof (*ff));
-
- ff->callback = callback;
- if (user_data == NULL)
- {
- ff->udata.data = NULL;
- ff->udata.free_func = NULL;
- }
- else
- {
- ff->udata = *user_data;
- }
-
- return (register_callback (&list_flush, name, (void *) ff));
+ return (create_register_callback (&list_flush, name,
+ (void *) callback, ud));
} /* int plugin_register_flush */
int plugin_register_shutdown (char *name,
int (*callback) (void))
{
- return (register_callback (&list_shutdown, name, (void *) callback));
+ return (create_register_callback (&list_shutdown, name,
+ (void *) callback, /* user_data = */ NULL));
} /* int plugin_register_shutdown */
int plugin_register_data_set (const data_set_t *ds)
} /* int plugin_register_data_set */
int plugin_register_log (const char *name,
- plugin_log_cb callback, user_data_t *user_data)
+ plugin_log_cb callback, user_data_t *ud)
{
- log_func_t *lf;
-
- lf = (log_func_t *) malloc (sizeof (*lf));
- if (lf == NULL)
- {
- ERROR ("plugin_register_log: malloc failed.");
- return (-1);
- }
- memset (lf, 0, sizeof (*lf));
-
- lf->callback = callback;
- if (user_data == NULL)
- {
- lf->udata.data = NULL;
- lf->udata.free_func = NULL;
- }
- else
- {
- lf->udata = *user_data;
- }
-
- return (register_callback (&list_log, name, (void *) lf));
+ return (create_register_callback (&list_log, name,
+ (void *) callback, ud));
} /* int plugin_register_log */
int plugin_register_notification (const char *name,
- int (*callback) (const notification_t *notif))
+ plugin_notification_cb callback, user_data_t *ud)
{
- return (register_callback (&list_notification, name, (void *) callback));
+ return (create_register_callback (&list_notification, name,
+ (void *) callback, ud));
} /* int plugin_register_log */
int plugin_unregister_config (const char *name)
int plugin_unregister_read (const char *name)
{
- llentry_t *e;
- read_func_t *rf;
-
- e = llist_search (list_read, name);
-
- if (e == NULL)
- return (-1);
-
- llist_remove (list_read, e);
-
- rf = (read_func_t *) e->value;
- plugin_user_data_destroy (&rf->udata);
- free (rf);
- free (e->key);
-
- llentry_destroy (e);
-
- return (0);
+ return (plugin_unregister (list_read, name));
}
int plugin_unregister_write (const char *name)
{
- llentry_t *e;
- write_func_t *wf;
-
- e = llist_search (list_write, name);
-
- if (e == NULL)
- return (-1);
-
- llist_remove (list_write, e);
-
- wf = (write_func_t *) e->value;
- plugin_user_data_destroy (&wf->udata);
- free (wf);
- free (e->key);
-
- llentry_destroy (e);
-
- return (0);
+ return (plugin_unregister (list_write, name));
}
int plugin_unregister_flush (const char *name)
{
- llentry_t *e;
- flush_func_t *ff;
-
- e = llist_search (list_flush, name);
-
- if (e == NULL)
- return (-1);
-
- llist_remove (list_flush, e);
-
- ff = (flush_func_t *) e->value;
- plugin_user_data_destroy (&ff->udata);
- free (ff);
- free (e->key);
-
- llentry_destroy (e);
-
- return (0);
+ return (plugin_unregister (list_flush, name));
}
int plugin_unregister_shutdown (const char *name)
int plugin_unregister_log (const char *name)
{
- llentry_t *e;
- log_func_t *lf;
-
- e = llist_search (list_log, name);
-
- if (e == NULL)
- return (-1);
-
- llist_remove (list_log, e);
-
- lf = (log_func_t *) e->value;
- plugin_user_data_destroy (&lf->udata);
- free (lf);
- free (e->key);
-
- llentry_destroy (e);
-
- return (0);
+ return (plugin_unregister (list_log, name));
}
int plugin_unregister_notification (const char *name)
void plugin_init_all (void)
{
const char *chain_name;
- int (*callback) (void);
llentry_t *le;
int status;
le = llist_head (list_init);
while (le != NULL)
{
- callback = (int (*) (void)) le->value;
+ callback_func_t *cf;
+ plugin_init_cb callback;
+
+ cf = le->value;
+ callback = cf->cf_callback;
status = (*callback) ();
if (status != 0)
{
rf = (read_func_t *) le->value;
- if (rf->needs_read != DONE)
+ if (rf->rf_needs_read != DONE)
{
le = le->next;
continue;
}
- if (rf->wait_left > 0)
- rf->wait_left -= interval_g;
+ if (rf->rf_wait_left > 0)
+ rf->rf_wait_left -= interval_g;
- if (rf->wait_left <= 0)
+ if (rf->rf_wait_left <= 0)
{
- rf->needs_read = TODO;
+ rf->rf_needs_read = TODO;
}
le = le->next;
{
rf = (read_func_t *) le->value;
- if (rf->type == RF_SIMPLE)
+ if (rf->rf_type == RF_SIMPLE)
{
- status = rf->callback.cb_simple ();
+ int (*callback) (void);
+
+ callback = rf->rf_callback;
+ status = (*callback) ();
}
else
{
- assert (rf->type == RF_COMPLEX);
- status = rf->callback.cb_complex (&rf->udata);
+ plugin_read_cb callback;
+
+ callback = rf->rf_callback;
+ status = (*callback) (&rf->rf_udata);
}
if (status != 0)
le = llist_head (list_write);
while (le != NULL)
{
- write_func_t *wf = le->value;
+ callback_func_t *cf = le->value;
+ plugin_write_cb callback;
DEBUG ("plugin: plugin_write: Writing values via %s.", le->key);
- status = wf->callback (ds, vl, &wf->udata);
+ callback = cf->cf_callback;
+ status = (*callback) (ds, vl, &cf->cf_udata);
if (status != 0)
failure++;
else
}
else /* plugin != NULL */
{
- write_func_t *wf;
+ callback_func_t *cf;
+ plugin_write_cb callback;
+
le = llist_head (list_write);
while (le != NULL)
{
if (le == NULL)
return (ENOENT);
- wf = le->value;
+ cf = le->value;
DEBUG ("plugin: plugin_write: Writing values via %s.", le->key);
- status = wf->callback (ds, vl, &wf->udata);
+ callback = cf->cf_callback;
+ status = (*callback) (ds, vl, &cf->cf_udata);
}
return (status);
le = llist_head (list_flush);
while (le != NULL)
{
- flush_func_t *ff;
+ callback_func_t *cf;
+ plugin_flush_cb callback;
if ((plugin != NULL)
&& (strcmp (plugin, le->key) != 0))
continue;
}
- ff = (flush_func_t *) le->value;
+ cf = le->value;
+ callback = cf->cf_callback;
- ff->callback (timeout, identifier, &ff->udata);
+ (*callback) (timeout, identifier, &cf->cf_udata);
le = le->next;
}
void plugin_shutdown_all (void)
{
- int (*callback) (void);
llentry_t *le;
stop_read_threads ();
- remove_read_functions ();
- if (list_shutdown == NULL)
- return;
+ destroy_all_callbacks (&list_init);
+ destroy_all_callbacks (&list_read);
+
+ plugin_flush (/* plugin = */ NULL, /* timeout = */ -1,
+ /* identifier = */ NULL);
+
+ le = NULL;
+ if (list_shutdown != NULL)
+ le = llist_head (list_shutdown);
- le = llist_head (list_shutdown);
while (le != NULL)
{
- callback = (int (*) (void)) le->value;
+ callback_func_t *cf;
+ plugin_shutdown_cb callback;
+
+ cf = le->value;
+ callback = cf->cf_callback;
/* Advance the pointer before calling the callback allows
* shutdown functions to unregister themselves. If done the
(*callback) ();
}
+
+ destroy_all_callbacks (&list_write);
+ destroy_all_callbacks (&list_flush);
+ destroy_all_callbacks (&list_notification);
+ destroy_all_callbacks (&list_shutdown);
+ destroy_all_callbacks (&list_log);
} /* void plugin_shutdown_all */
int plugin_dispatch_values (value_list_t *vl)
int status;
static c_complain_t no_write_complaint = C_COMPLAIN_INIT_STATIC;
+ value_t *saved_values;
+ int saved_values_len;
+
data_set_t *ds;
- if ((vl == NULL) || (*vl->type == '\0')) {
+ if ((vl == NULL) || (vl->type[0] == 0)
+ || (vl->values == NULL) || (vl->values_len < 1))
+ {
ERROR ("plugin_dispatch_values: Invalid value list.");
return (-1);
}
escape_slashes (vl->type, sizeof (vl->type));
escape_slashes (vl->type_instance, sizeof (vl->type_instance));
+ /* Copy the values. This way, we can assure `targets' that they get
+ * dynamically allocated values, which they can free and replace if
+ * they like. */
+ if ((pre_cache_chain != NULL) || (post_cache_chain != NULL))
+ {
+ saved_values = vl->values;
+ saved_values_len = vl->values_len;
+
+ vl->values = (value_t *) calloc (vl->values_len,
+ sizeof (*vl->values));
+ if (vl->values == NULL)
+ {
+ ERROR ("plugin_dispatch_values: calloc failed.");
+ vl->values = saved_values;
+ return (-1);
+ }
+ memcpy (vl->values, saved_values,
+ vl->values_len * sizeof (*vl->values));
+ }
+ else /* if ((pre == NULL) && (post == NULL)) */
+ {
+ saved_values = NULL;
+ saved_values_len = 0;
+ }
+
if (pre_cache_chain != NULL)
{
status = fc_process_chain (ds, vl, pre_cache_chain);
status, status);
}
else if (status == FC_TARGET_STOP)
+ {
+ /* Restore the state of the value_list so that plugins
+ * don't get confused.. */
+ if (saved_values != NULL)
+ {
+ free (vl->values);
+ vl->values = saved_values;
+ vl->values_len = saved_values_len;
+ }
return (0);
+ }
}
/* Update the value cache */
else
fc_default_action (ds, vl);
+ /* Restore the state of the value_list so that plugins don't get
+ * confused.. */
+ if (saved_values != NULL)
+ {
+ free (vl->values);
+ vl->values = saved_values;
+ vl->values_len = saved_values_len;
+ }
+
return (0);
} /* int plugin_dispatch_values */
int plugin_dispatch_notification (const notification_t *notif)
{
- int (*callback) (const notification_t *);
llentry_t *le;
/* Possible TODO: Add flap detection here */
le = llist_head (list_notification);
while (le != NULL)
{
- callback = (int (*) (const notification_t *)) le->value;
- (*callback) (notif);
+ callback_func_t *cf;
+ plugin_notification_cb callback;
+ int status;
+
+ cf = le->value;
+ callback = cf->cf_callback;
+ status = (*callback) (notif, &cf->cf_udata);
+ if (status != 0)
+ {
+ WARNING ("plugin_dispatch_notification: Notification "
+ "callback %s returned %i.",
+ le->key, status);
+ }
le = le->next;
}
le = llist_head (list_log);
while (le != NULL)
{
- log_func_t *lf;
+ callback_func_t *cf;
+ plugin_log_cb callback;
- lf = (log_func_t *) le->value;
+ cf = le->value;
+ callback = cf->cf_callback;
- lf->callback (level, msg, &lf->udata);
+ (*callback) (level, msg, &cf->cf_udata);
le = le->next;
}
return (0);
} /* int plugin_notification_meta_free */
+
+/* vim: set sw=8 ts=8 noet fdm=marker : */
projects / collectd.git / blobdiff