X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fplugin.c;h=9c2af5d7b8c6b3617512df94ee5dc27c1fbd380b;hb=d8825859c7b31f068899c2d5f8a147ea1ef65750;hp=4a3c917104ab1030b291469116463328383c3c50;hpb=f6d2b3c2f83808f9f3913bf0220b3e6ad84fe23c;p=collectd.git diff --git a/src/plugin.c b/src/plugin.c index 4a3c9171..9c2af5d7 100644 --- a/src/plugin.c +++ b/src/plugin.c @@ -1,6 +1,6 @@ /** * collectd - src/plugin.c - * Copyright (C) 2005-2009 Florian octo Forster + * Copyright (C) 2005-2011 Florian octo Forster * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -16,7 +16,7 @@ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * * Authors: - * Florian octo Forster + * Florian octo Forster * Sebastian Harl **/ @@ -36,7 +36,6 @@ #include "utils_llist.h" #include "utils_heap.h" #include "utils_cache.h" -#include "utils_threshold.h" #include "filter_chain.h" /* @@ -46,6 +45,7 @@ struct callback_func_s { void *cf_callback; user_data_t cf_udata; + plugin_ctx_t cf_ctx; }; typedef struct callback_func_s callback_func_t; @@ -58,6 +58,7 @@ struct read_func_s * 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 +#define rf_ctx rf_super.cf_ctx callback_func_t rf_super; char rf_group[DATA_MAX_NAME_LEN]; char rf_name[DATA_MAX_NAME_LEN]; @@ -74,6 +75,7 @@ typedef struct read_func_s read_func_t; static llist_t *list_init; static llist_t *list_write; static llist_t *list_flush; +static llist_t *list_missing; static llist_t *list_shutdown; static llist_t *list_log; static llist_t *list_notification; @@ -93,6 +95,9 @@ static pthread_cond_t read_cond = PTHREAD_COND_INITIALIZER; static pthread_t *read_threads = NULL; static int read_threads_num = 0; +static pthread_key_t plugin_ctx_key; +static _Bool plugin_ctx_key_initialized = 0; + /* * Static functions */ @@ -246,6 +251,8 @@ static int create_register_callback (llist_t **list, /* {{{ */ cf->cf_udata = *ud; } + cf->cf_ctx = plugin_get_ctx (); + return (register_callback (list, name, cf)); } /* }}} int create_register_callback */ @@ -280,8 +287,6 @@ static int plugin_load_file (char *file, uint32_t flags) lt_dlhandle dlh; void (*reg_handle) (void); - DEBUG ("file = %s", file); - lt_dlinit (); lt_dlerror (); /* clear errors */ @@ -293,27 +298,39 @@ static int plugin_load_file (char *file, uint32_t flags) dlh = lt_dlopenadvise(file, advise); lt_dladvise_destroy(&advise); } else { - dlh = lt_dlopen (file); + dlh = lt_dlopen (file); } #else /* if LIBTOOL_VERSION == 1 */ if (flags & PLUGIN_FLAGS_GLOBAL) - ERROR ("plugin_load_file: The global flag is not supported, " + WARNING ("plugin_load_file: The global flag is not supported, " "libtool 2 is required for this."); dlh = lt_dlopen (file); #endif if (dlh == NULL) { - const char *error = lt_dlerror (); + char errbuf[1024] = ""; + + ssnprintf (errbuf, sizeof (errbuf), + "lt_dlopen (\"%s\") failed: %s. " + "The most common cause for this problem are " + "missing dependencies. Use ldd(1) to check " + "the dependencies of the plugin " + "/ shared object.", + file, lt_dlerror ()); + + ERROR ("%s", errbuf); + /* Make sure this is printed to STDERR in any case, but also + * make sure it's printed only once. */ + if (list_log != NULL) + fprintf (stderr, "ERROR: %s\n", errbuf); - ERROR ("lt_dlopen (%s) failed: %s", file, error); - fprintf (stderr, "lt_dlopen (%s) failed: %s\n", file, error); return (1); } if ((reg_handle = (void (*) (void)) lt_dlsym (dlh, "module_register")) == NULL) { - WARNING ("Couldn't find symbol `module_register' in `%s': %s\n", + WARNING ("Couldn't find symbol \"module_register\" in \"%s\": %s\n", file, lt_dlerror ()); lt_dlclose (dlh); return (-1); @@ -336,7 +353,8 @@ static void *plugin_read_thread (void __attribute__((unused)) *args) while (read_loop != 0) { read_func_t *rf; - struct timeval now; + plugin_ctx_t old_ctx; + cdtime_t now; int status; int rf_type; int rc; @@ -347,10 +365,9 @@ static void *plugin_read_thread (void __attribute__((unused)) *args) { struct timespec abstime; - gettimeofday (&now, /* timezone = */ NULL); + now = cdtime (); - abstime.tv_sec = now.tv_sec + interval_g; - abstime.tv_nsec = 1000 * now.tv_usec; + CDTIME_T_TO_TIMESPEC (now + interval_g, &abstime); pthread_mutex_lock (&read_lock); pthread_cond_timedwait (&read_cond, &read_lock, @@ -361,15 +378,13 @@ static void *plugin_read_thread (void __attribute__((unused)) *args) if ((rf->rf_interval.tv_sec == 0) && (rf->rf_interval.tv_nsec == 0)) { - gettimeofday (&now, /* timezone = */ NULL); + now = cdtime (); - rf->rf_interval.tv_sec = interval_g; - rf->rf_interval.tv_nsec = 0; + CDTIME_T_TO_TIMESPEC (plugin_get_interval (), &rf->rf_interval); rf->rf_effective_interval = rf->rf_interval; - rf->rf_next_read.tv_sec = now.tv_sec; - rf->rf_next_read.tv_nsec = 1000 * now.tv_usec; + CDTIME_T_TO_TIMESPEC (now, &rf->rf_next_read); } /* sleep until this entry is due, @@ -416,6 +431,8 @@ static void *plugin_read_thread (void __attribute__((unused)) *args) DEBUG ("plugin_read_thread: Handling `%s'.", rf->rf_name); + old_ctx = plugin_set_ctx (rf->rf_ctx); + if (rf_type == RF_SIMPLE) { int (*callback) (void); @@ -433,6 +450,8 @@ static void *plugin_read_thread (void __attribute__((unused)) *args) status = (*callback) (&rf->rf_udata); } + plugin_set_ctx (old_ctx); + /* If the function signals failure, we will increase the * intervals in which it will be called. */ if (status != 0) @@ -459,7 +478,7 @@ static void *plugin_read_thread (void __attribute__((unused)) *args) } /* update the ``next read due'' field */ - gettimeofday (&now, /* timezone = */ NULL); + now = cdtime (); DEBUG ("plugin_read_thread: Effective interval of the " "%s plugin is %i.%09i.", @@ -476,15 +495,12 @@ static void *plugin_read_thread (void __attribute__((unused)) *args) NORMALIZE_TIMESPEC (rf->rf_next_read); /* Check, if `rf_next_read' is in the past. */ - if ((rf->rf_next_read.tv_sec < now.tv_sec) - || ((rf->rf_next_read.tv_sec == now.tv_sec) - && (rf->rf_next_read.tv_nsec < (1000 * now.tv_usec)))) + if (TIMESPEC_TO_CDTIME_T (&rf->rf_next_read) < now) { /* `rf_next_read' is in the past. Insert `now' * so this value doesn't trail off into the * past too much. */ - rf->rf_next_read.tv_sec = now.tv_sec; - rf->rf_next_read.tv_nsec = 1000 * now.tv_usec; + CDTIME_T_TO_TIMESPEC (now, &rf->rf_next_read); } DEBUG ("plugin_read_thread: Next read of the %s plugin at %i.%09i.", @@ -734,6 +750,17 @@ static int plugin_insert_read (read_func_t *rf) } } + le = llist_search (read_list, rf->rf_name); + if (le != NULL) + { + pthread_mutex_unlock (&read_lock); + WARNING ("The read function \"%s\" is already registered. " + "Check for duplicate \"LoadPlugin\" lines " + "in your configuration!", + rf->rf_name); + return (EINVAL); + } + le = llentry_create (rf->rf_name, rf); if (le == NULL) { @@ -758,24 +785,55 @@ static int plugin_insert_read (read_func_t *rf) return (0); } /* int plugin_insert_read */ +static int read_cb_wrapper (user_data_t *ud) +{ + int (*callback) (void); + + if (ud == NULL) + return -1; + + callback = ud->data; + return callback(); +} /* int read_cb_wrapper */ + int plugin_register_read (const char *name, int (*callback) (void)) { read_func_t *rf; + plugin_ctx_t ctx = plugin_get_ctx (); + int status; + + if (ctx.interval != 0) { + /* If ctx.interval is not zero (== use the plugin or global + * interval), we need to use the "complex" read callback, + * because only that allows to specify a different interval. + * Wrap the callback using read_cb_wrapper(). */ + struct timespec interval; + user_data_t user_data; - rf = (read_func_t *) malloc (sizeof (read_func_t)); + DEBUG ("plugin_register_read: plugin_interval = %.3f", + CDTIME_T_TO_DOUBLE(plugin_interval)); + + user_data.data = callback; + user_data.free_func = NULL; + + CDTIME_T_TO_TIMESPEC (ctx.interval, &interval); + return plugin_register_complex_read (/* group = */ NULL, + name, read_cb_wrapper, &interval, &user_data); + } + + rf = malloc (sizeof (*rf)); if (rf == NULL) { - char errbuf[1024]; - ERROR ("plugin_register_read: malloc failed: %s", - sstrerror (errno, errbuf, sizeof (errbuf))); - return (-1); + ERROR ("plugin_register_read: malloc failed."); + return (ENOMEM); } memset (rf, 0, sizeof (read_func_t)); rf->rf_callback = (void *) callback; rf->rf_udata.data = NULL; rf->rf_udata.free_func = NULL; + rf->rf_ctx = ctx; rf->rf_group[0] = '\0'; sstrncpy (rf->rf_name, name, sizeof (rf->rf_name)); rf->rf_type = RF_SIMPLE; @@ -783,7 +841,11 @@ int plugin_register_read (const char *name, rf->rf_interval.tv_nsec = 0; rf->rf_effective_interval = rf->rf_interval; - return (plugin_insert_read (rf)); + status = plugin_insert_read (rf); + if (status != 0) + sfree (rf); + + return (status); } /* int plugin_register_read */ int plugin_register_complex_read (const char *group, const char *name, @@ -792,12 +854,14 @@ int plugin_register_complex_read (const char *group, const char *name, user_data_t *user_data) { read_func_t *rf; + plugin_ctx_t ctx = plugin_get_ctx (); + int status; - rf = (read_func_t *) malloc (sizeof (read_func_t)); + rf = malloc (sizeof (*rf)); if (rf == NULL) { ERROR ("plugin_register_complex_read: malloc failed."); - return (-1); + return (ENOMEM); } memset (rf, 0, sizeof (read_func_t)); @@ -812,6 +876,10 @@ int plugin_register_complex_read (const char *group, const char *name, { rf->rf_interval = *interval; } + else if (ctx.interval != 0) + { + CDTIME_T_TO_TIMESPEC (ctx.interval, &rf->rf_interval); + } rf->rf_effective_interval = rf->rf_interval; /* Set user data */ @@ -825,7 +893,13 @@ int plugin_register_complex_read (const char *group, const char *name, rf->rf_udata = *user_data; } - return (plugin_insert_read (rf)); + rf->rf_ctx = ctx; + + status = plugin_insert_read (rf); + if (status != 0) + sfree (rf); + + return (status); } /* int plugin_register_complex_read */ int plugin_register_write (const char *name, @@ -842,7 +916,14 @@ int plugin_register_flush (const char *name, (void *) callback, ud)); } /* int plugin_register_flush */ -int plugin_register_shutdown (char *name, +int plugin_register_missing (const char *name, + plugin_missing_cb callback, user_data_t *ud) +{ + return (create_register_callback (&list_missing, name, + (void *) callback, ud)); +} /* int plugin_register_missing */ + +int plugin_register_shutdown (const char *name, int (*callback) (void)) { return (create_register_callback (&list_shutdown, name, @@ -1028,6 +1109,11 @@ int plugin_unregister_flush (const char *name) return (plugin_unregister (list_flush, name)); } +int plugin_unregister_missing (const char *name) +{ + return (plugin_unregister (list_missing, name)); +} + int plugin_unregister_shutdown (const char *name) { return (plugin_unregister (list_shutdown, name)); @@ -1086,10 +1172,13 @@ void plugin_init_all (void) { callback_func_t *cf; plugin_init_cb callback; + plugin_ctx_t old_ctx; cf = le->value; + old_ctx = plugin_set_ctx (cf->cf_ctx); callback = cf->cf_callback; status = (*callback) (); + plugin_set_ctx (old_ctx); if (status != 0) { @@ -1142,11 +1231,14 @@ int plugin_read_all_once (void) while (42) { read_func_t *rf; + plugin_ctx_t old_ctx; rf = c_heap_get_root (read_heap); if (rf == NULL) break; + old_ctx = plugin_set_ctx (rf->rf_ctx); + if (rf->rf_type == RF_SIMPLE) { int (*callback) (void); @@ -1162,6 +1254,8 @@ int plugin_read_all_once (void) status = (*callback) (&rf->rf_udata); } + plugin_set_ctx (old_ctx); + if (status != 0) { NOTICE ("read-function of plugin `%s' failed.", @@ -1207,6 +1301,7 @@ int plugin_write (const char *plugin, /* {{{ */ { callback_func_t *cf = le->value; plugin_write_cb callback; + plugin_ctx_t old_ctx = plugin_set_ctx (cf->cf_ctx); DEBUG ("plugin: plugin_write: Writing values via %s.", le->key); callback = cf->cf_callback; @@ -1216,6 +1311,8 @@ int plugin_write (const char *plugin, /* {{{ */ else success++; + plugin_set_ctx (old_ctx); + le = le->next; } @@ -1228,6 +1325,7 @@ int plugin_write (const char *plugin, /* {{{ */ { callback_func_t *cf; plugin_write_cb callback; + plugin_ctx_t old_ctx; le = llist_head (list_write); while (le != NULL) @@ -1243,15 +1341,19 @@ int plugin_write (const char *plugin, /* {{{ */ cf = le->value; + old_ctx = plugin_set_ctx (cf->cf_ctx); + DEBUG ("plugin: plugin_write: Writing values via %s.", le->key); callback = cf->cf_callback; status = (*callback) (ds, vl, &cf->cf_udata); + + plugin_set_ctx (old_ctx); } return (status); } /* }}} int plugin_write */ -int plugin_flush (const char *plugin, int timeout, const char *identifier) +int plugin_flush (const char *plugin, cdtime_t timeout, const char *identifier) { llentry_t *le; @@ -1263,6 +1365,7 @@ int plugin_flush (const char *plugin, int timeout, const char *identifier) { callback_func_t *cf; plugin_flush_cb callback; + plugin_ctx_t old_ctx; if ((plugin != NULL) && (strcmp (plugin, le->key) != 0)) @@ -1272,10 +1375,13 @@ int plugin_flush (const char *plugin, int timeout, const char *identifier) } cf = le->value; + old_ctx = plugin_set_ctx (cf->cf_ctx); callback = cf->cf_callback; (*callback) (timeout, identifier, &cf->cf_udata); + plugin_set_ctx (old_ctx); + le = le->next; } return (0); @@ -1296,7 +1402,8 @@ void plugin_shutdown_all (void) destroy_read_heap (); - plugin_flush (/* plugin = */ NULL, /* timeout = */ -1, + plugin_flush (/* plugin = */ NULL, + /* timeout = */ 0, /* identifier = */ NULL); le = NULL; @@ -1307,8 +1414,10 @@ void plugin_shutdown_all (void) { callback_func_t *cf; plugin_shutdown_cb callback; + plugin_ctx_t old_ctx; cf = le->value; + old_ctx = plugin_set_ctx (cf->cf_ctx); callback = cf->cf_callback; /* Advance the pointer before calling the callback allows @@ -1318,6 +1427,8 @@ void plugin_shutdown_all (void) le = le->next; (*callback) (); + + plugin_set_ctx (old_ctx); } /* Write plugins which use the `user_data' pointer usually need the @@ -1326,6 +1437,7 @@ void plugin_shutdown_all (void) * the real free function when registering the write callback. This way * the data isn't freed twice. */ destroy_all_callbacks (&list_flush); + destroy_all_callbacks (&list_missing); destroy_all_callbacks (&list_write); destroy_all_callbacks (&list_notification); @@ -1333,6 +1445,47 @@ void plugin_shutdown_all (void) destroy_all_callbacks (&list_log); } /* void plugin_shutdown_all */ +int plugin_dispatch_missing (const value_list_t *vl) /* {{{ */ +{ + llentry_t *le; + + if (list_missing == NULL) + return (0); + + le = llist_head (list_missing); + while (le != NULL) + { + callback_func_t *cf; + plugin_missing_cb callback; + plugin_ctx_t old_ctx; + int status; + + cf = le->value; + old_ctx = plugin_set_ctx (cf->cf_ctx); + callback = cf->cf_callback; + + status = (*callback) (vl, &cf->cf_udata); + plugin_set_ctx (old_ctx); + if (status != 0) + { + if (status < 0) + { + ERROR ("plugin_dispatch_missing: Callback function \"%s\" " + "failed with status %i.", + le->key, status); + return (status); + } + else + { + return (0); + } + } + + le = le->next; + } + return (0); +} /* int }}} plugin_dispatch_missing */ + int plugin_dispatch_values (value_list_t *vl) { int status; @@ -1348,7 +1501,8 @@ int plugin_dispatch_values (value_list_t *vl) if ((vl == NULL) || (vl->type[0] == 0) || (vl->values == NULL) || (vl->values_len < 1)) { - ERROR ("plugin_dispatch_values: Invalid value list."); + ERROR ("plugin_dispatch_values: Invalid value list " + "from plugin %s.", vl->plugin); return (-1); } @@ -1374,21 +1528,33 @@ int plugin_dispatch_values (value_list_t *vl) if (c_avl_get (data_sets, vl->type, (void *) &ds) != 0) { - INFO ("plugin_dispatch_values: Dataset not found: %s", vl->type); + char ident[6 * DATA_MAX_NAME_LEN]; + + FORMAT_VL (ident, sizeof (ident), vl); + INFO ("plugin_dispatch_values: Dataset not found: %s " + "(from \"%s\"), check your types.db!", + vl->type, ident); return (-1); } if (vl->time == 0) - vl->time = time (NULL); + vl->time = cdtime (); + + if (vl->interval <= 0) { + plugin_ctx_t ctx = plugin_get_ctx (); - if (vl->interval <= 0) - vl->interval = interval_g; + if (ctx.interval != 0) + vl->interval = ctx.interval; + else + vl->interval = interval_g; + } - DEBUG ("plugin_dispatch_values: time = %u; interval = %i; " + DEBUG ("plugin_dispatch_values: time = %.3f; interval = %.3f; " "host = %s; " "plugin = %s; plugin_instance = %s; " "type = %s; type_instance = %s;", - (unsigned int) vl->time, vl->interval, + CDTIME_T_TO_DOUBLE (vl->time), + CDTIME_T_TO_DOUBLE (vl->interval), vl->host, vl->plugin, vl->plugin_instance, vl->type, vl->type_instance); @@ -1472,9 +1638,6 @@ int plugin_dispatch_values (value_list_t *vl) /* Update the value cache */ uc_update (ds, vl); - /* Initiate threshold checking */ - ut_check_threshold (ds, vl); - if (post_cache_chain != NULL) { status = fc_process_chain (ds, vl, post_cache_chain); @@ -1507,15 +1670,61 @@ int plugin_dispatch_values (value_list_t *vl) return (0); } /* int plugin_dispatch_values */ +int plugin_dispatch_values_secure (const value_list_t *vl) +{ + value_list_t vl_copy; + int status; + + if (vl == NULL) + return EINVAL; + + memcpy (&vl_copy, vl, sizeof (vl_copy)); + + /* Write callbacks must not change the values and meta pointers, so we can + * savely skip copying those and make this more efficient. */ + if ((pre_cache_chain == NULL) && (post_cache_chain == NULL)) + return (plugin_dispatch_values (&vl_copy)); + + /* Set pointers to NULL, just to be on the save side. */ + vl_copy.values = NULL; + vl_copy.meta = NULL; + + vl_copy.values = malloc (sizeof (*vl_copy.values) * vl->values_len); + if (vl_copy.values == NULL) + { + ERROR ("plugin_dispatch_values_secure: malloc failed."); + return (ENOMEM); + } + memcpy (vl_copy.values, vl->values, sizeof (*vl_copy.values) * vl->values_len); + + if (vl->meta != NULL) + { + vl_copy.meta = meta_data_clone (vl->meta); + if (vl_copy.meta == NULL) + { + ERROR ("plugin_dispatch_values_secure: meta_data_clone failed."); + free (vl_copy.values); + return (ENOMEM); + } + } /* if (vl->meta) */ + + status = plugin_dispatch_values (&vl_copy); + + meta_data_destroy (vl_copy.meta); + free (vl_copy.values); + + return (status); +} /* int plugin_dispatch_values_secure */ + int plugin_dispatch_notification (const notification_t *notif) { llentry_t *le; /* Possible TODO: Add flap detection here */ DEBUG ("plugin_dispatch_notification: severity = %i; message = %s; " - "time = %u; host = %s;", + "time = %.3f; host = %s;", notif->severity, notif->message, - (unsigned int) notif->time, notif->host); + CDTIME_T_TO_DOUBLE (notif->time), notif->host); /* Nobody cares for notifications */ if (list_notification == NULL) @@ -1526,11 +1735,14 @@ int plugin_dispatch_notification (const notification_t *notif) { callback_func_t *cf; plugin_notification_cb callback; + plugin_ctx_t old_ctx; int status; cf = le->value; + old_ctx = plugin_set_ctx (cf->cf_ctx); callback = cf->cf_callback; status = (*callback) (notif, &cf->cf_udata); + plugin_set_ctx (old_ctx); if (status != 0) { WARNING ("plugin_dispatch_notification: Notification " @@ -1571,12 +1783,15 @@ void plugin_log (int level, const char *format, ...) { callback_func_t *cf; plugin_log_cb callback; + plugin_ctx_t old_ctx; cf = le->value; + old_ctx = plugin_set_ctx (cf->cf_ctx); callback = cf->cf_callback; (*callback) (level, msg, &cf->cf_udata); + plugin_set_ctx (old_ctx); le = le->next; } } /* void plugin_log */ @@ -1649,7 +1864,7 @@ static int plugin_notification_meta_add (notification_t *n, } case NM_TYPE_BOOLEAN: { - meta->nm_value.nm_boolean = *((bool *) value); + meta->nm_value.nm_boolean = *((_Bool *) value); break; } default: @@ -1703,7 +1918,7 @@ int plugin_notification_meta_add_double (notification_t *n, int plugin_notification_meta_add_boolean (notification_t *n, const char *name, - bool value) + _Bool value) { return (plugin_notification_meta_add (n, name, NM_TYPE_BOOLEAN, &value)); } @@ -1769,4 +1984,136 @@ int plugin_notification_meta_free (notification_meta_t *n) return (0); } /* int plugin_notification_meta_free */ +static void plugin_ctx_destructor (void *ctx) +{ + sfree (ctx); +} /* void plugin_ctx_destructor */ + +static plugin_ctx_t ctx_init = { /* interval = */ 0 }; + +static plugin_ctx_t *plugin_ctx_create (void) +{ + plugin_ctx_t *ctx; + + ctx = malloc (sizeof (*ctx)); + if (ctx == NULL) { + char errbuf[1024]; + ERROR ("Failed to allocate plugin context: %s", + sstrerror (errno, errbuf, sizeof (errbuf))); + return NULL; + } + + *ctx = ctx_init; + assert (plugin_ctx_key_initialized); + pthread_setspecific (plugin_ctx_key, ctx); + DEBUG("Created new plugin context."); + return (ctx); +} /* int plugin_ctx_create */ + +void plugin_init_ctx (void) +{ + pthread_key_create (&plugin_ctx_key, plugin_ctx_destructor); + plugin_ctx_key_initialized = 1; +} /* void plugin_init_ctx */ + +plugin_ctx_t plugin_get_ctx (void) +{ + plugin_ctx_t *ctx; + + assert (plugin_ctx_key_initialized); + ctx = pthread_getspecific (plugin_ctx_key); + + if (ctx == NULL) { + ctx = plugin_ctx_create (); + /* this must no happen -- exit() instead? */ + if (ctx == NULL) + return ctx_init; + } + + return (*ctx); +} /* plugin_ctx_t plugin_get_ctx */ + +plugin_ctx_t plugin_set_ctx (plugin_ctx_t ctx) +{ + plugin_ctx_t *c; + plugin_ctx_t old; + + assert (plugin_ctx_key_initialized); + c = pthread_getspecific (plugin_ctx_key); + + if (c == NULL) { + c = plugin_ctx_create (); + /* this must no happen -- exit() instead? */ + if (c == NULL) + return ctx_init; + } + + old = *c; + *c = ctx; + + return (old); +} /* void plugin_set_ctx */ + +cdtime_t plugin_get_interval (void) +{ + cdtime_t interval; + + const char *interval_str; + double interval_dbl; + + interval = plugin_get_ctx().interval; + if (interval > 0) + return interval; + + /* this should happen during initialization only */ + interval_str = global_option_get ("Interval"); + if (interval_str != NULL) + { + interval_dbl = atof (interval_str); + if (interval_dbl > 0.0) + interval = DOUBLE_TO_CDTIME_T (interval_dbl); + } + + if (interval > 0) + return interval; + return TIME_T_TO_CDTIME_T (10); +} /* cdtime_t plugin_get_interval */ + +typedef struct { + plugin_ctx_t ctx; + void *(*start_routine) (void *); + void *arg; +} plugin_thread_t; + +static void *plugin_thread_start (void *arg) +{ + plugin_thread_t *plugin_thread = arg; + + void *(*start_routine) (void *) = plugin_thread->start_routine; + void *plugin_arg = plugin_thread->arg; + + plugin_set_ctx (plugin_thread->ctx); + + free (plugin_thread); + + return start_routine (plugin_arg); +} /* void *plugin_thread_start */ + +int plugin_thread_create (pthread_t *thread, const pthread_attr_t *attr, + void *(*start_routine) (void *), void *arg) +{ + plugin_thread_t *plugin_thread; + + plugin_thread = malloc (sizeof (*plugin_thread)); + if (plugin_thread == NULL) + return -1; + + plugin_thread->ctx = plugin_get_ctx (); + plugin_thread->start_routine = start_routine; + plugin_thread->arg = arg; + + return pthread_create (thread, attr, + plugin_thread_start, plugin_thread); +} /* int plugin_thread_create */ + /* vim: set sw=8 ts=8 noet fdm=marker : */