/**
* collectd - src/perl.c
- * Copyright (C) 2007 Sebastian Harl
+ * Copyright (C) 2007, 2008 Sebastian Harl
*
* 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
#include "plugin.h"
#include "common.h"
+#include <pthread.h>
+
#if !defined(USE_ITHREADS)
# error "Perl does not support ithreads!"
#endif /* !defined(USE_ITHREADS) */
+/* clear the Perl sub's stack frame
+ * (this should only be used inside an XSUB) */
+#define CLEAR_STACK_FRAME PL_stack_sp = PL_stack_base + *PL_markstack_ptr
+
#define PLUGIN_INIT 0
#define PLUGIN_READ 1
#define PLUGIN_WRITE 2
#define PLUGIN_SHUTDOWN 3
#define PLUGIN_LOG 4
+#define PLUGIN_NOTIF 5
-#define PLUGIN_TYPES 5
+#define PLUGIN_TYPES 6
#define PLUGIN_DATASET 255
static XS (Collectd_plugin_register_ds);
static XS (Collectd_plugin_unregister_ds);
static XS (Collectd_plugin_dispatch_values);
+static XS (Collectd_plugin_dispatch_notification);
static XS (Collectd_plugin_log);
+static XS (Collectd_call_by_name);
+
+/*
+ * private data types
+ */
+
+typedef struct c_ithread_s {
+ /* the thread's Perl interpreter */
+ PerlInterpreter *interp;
+
+ /* double linked list of threads */
+ struct c_ithread_s *prev;
+ struct c_ithread_s *next;
+} c_ithread_t;
+
+typedef struct {
+ c_ithread_t *head;
+ c_ithread_t *tail;
+
+#if COLLECT_DEBUG
+ /* some usage stats */
+ int number_of_threads;
+#endif /* COLLECT_DEBUG */
+
+ pthread_mutex_t mutex;
+} c_ithread_list_t;
/*
* private variables
*/
-static PerlInterpreter *perl = NULL;
+/* if perl_threads != NULL perl_threads->head must
+ * point to the "base" thread */
+static c_ithread_list_t *perl_threads = NULL;
-static int perl_argc = 0;
+/* the key used to store each pthread's ithread */
+static pthread_key_t perl_thr_key;
+
+static int perl_argc = 0;
static char **perl_argv = NULL;
static char base_name[DATA_MAX_NAME_LEN] = "";
{ "Collectd::plugin_register_data_set", Collectd_plugin_register_ds },
{ "Collectd::plugin_unregister_data_set", Collectd_plugin_unregister_ds },
{ "Collectd::plugin_dispatch_values", Collectd_plugin_dispatch_values },
+ { "Collectd::plugin_dispatch_notification",
+ Collectd_plugin_dispatch_notification },
{ "Collectd::plugin_log", Collectd_plugin_log },
+ { "Collectd::call_by_name", Collectd_call_by_name },
{ "", NULL }
};
{ "Collectd::TYPE_WRITE", PLUGIN_WRITE },
{ "Collectd::TYPE_SHUTDOWN", PLUGIN_SHUTDOWN },
{ "Collectd::TYPE_LOG", PLUGIN_LOG },
+ { "Collectd::TYPE_NOTIF", PLUGIN_NOTIF },
{ "Collectd::TYPE_DATASET", PLUGIN_DATASET },
{ "Collectd::DS_TYPE_COUNTER", DS_TYPE_COUNTER },
{ "Collectd::DS_TYPE_GAUGE", DS_TYPE_GAUGE },
{ "Collectd::LOG_NOTICE", LOG_NOTICE },
{ "Collectd::LOG_INFO", LOG_INFO },
{ "Collectd::LOG_DEBUG", LOG_DEBUG },
+ { "Collectd::NOTIF_FAILURE", NOTIF_FAILURE },
+ { "Collectd::NOTIF_WARNING", NOTIF_WARNING },
+ { "Collectd::NOTIF_OKAY", NOTIF_OKAY },
{ "", 0 }
};
+struct {
+ char name[64];
+ char *var;
+} g_strings[] =
+{
+ { "Collectd::hostname_g", hostname_g },
+ { "", NULL }
+};
+
+struct {
+ char name[64];
+ int *var;
+} g_integers[] =
+{
+ { "Collectd::interval_g", &interval_g },
+ { "", NULL }
+};
+
/*
* Helper functions for data type conversion.
*/
return -1;
if (NULL != (tmp = hv_fetch (hash, "name", 4, 0))) {
- strncpy (ds->name, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
- ds->name[DATA_MAX_NAME_LEN - 1] = '\0';
+ sstrncpy (ds->name, SvPV_nolen (*tmp), sizeof (ds->name));
}
else {
log_err ("hv2data_source: No DS name given.");
newSVpv (vl->plugin_instance, 0), 0))
return -1;
+ if ('\0' != vl->type[0])
+ if (NULL == hv_store (hash, "type", 4, newSVpv (vl->type, 0), 0))
+ return -1;
+
if ('\0' != vl->type_instance[0])
if (NULL == hv_store (hash, "type_instance", 13,
newSVpv (vl->type_instance, 0), 0))
return 0;
} /* static int value2av (value_list_t *, data_set_t *, HV *) */
+static int notification2hv (pTHX_ notification_t *n, HV *hash)
+{
+ if (NULL == hv_store (hash, "severity", 8, newSViv (n->severity), 0))
+ return -1;
+
+ if (0 != n->time)
+ if (NULL == hv_store (hash, "time", 4, newSViv (n->time), 0))
+ return -1;
+
+ if ('\0' != *n->message)
+ if (NULL == hv_store (hash, "message", 7, newSVpv (n->message, 0), 0))
+ return -1;
+
+ if ('\0' != *n->host)
+ if (NULL == hv_store (hash, "host", 4, newSVpv (n->host, 0), 0))
+ return -1;
+
+ if ('\0' != *n->plugin)
+ if (NULL == hv_store (hash, "plugin", 6, newSVpv (n->plugin, 0), 0))
+ return -1;
+
+ if ('\0' != *n->plugin_instance)
+ if (NULL == hv_store (hash, "plugin_instance", 15,
+ newSVpv (n->plugin_instance, 0), 0))
+ return -1;
+
+ if ('\0' != *n->type)
+ if (NULL == hv_store (hash, "type", 4, newSVpv (n->type, 0), 0))
+ return -1;
+
+ if ('\0' != *n->type_instance)
+ if (NULL == hv_store (hash, "type_instance", 13,
+ newSVpv (n->type_instance, 0), 0))
+ return -1;
+ return 0;
+} /* static int notification2hv (notification_t *, HV *) */
+
/*
* Internal functions.
*/
static char *get_module_name (char *buf, size_t buf_len, const char *module) {
int status = 0;
if (base_name[0] == '\0')
- status = snprintf (buf, buf_len, "%s", module);
+ status = ssnprintf (buf, buf_len, "%s", module);
else
- status = snprintf (buf, buf_len, "%s::%s", base_name, module);
- if ((status < 0) || (status >= buf_len))
+ status = ssnprintf (buf, buf_len, "%s::%s", base_name, module);
+ if ((status < 0) || ((unsigned int)status >= buf_len))
return (NULL);
- buf[buf_len - 1] = '\0';
return (buf);
} /* char *get_module_name */
static int pplugin_register_data_set (pTHX_ char *name, AV *dataset)
{
int len = -1;
+ int ret = 0;
int i = 0;
data_source_t *ds = NULL;
ds[i].name, ds[i].type, ds[i].min, ds[i].max);
}
- strncpy (set->type, name, DATA_MAX_NAME_LEN);
- set->type[DATA_MAX_NAME_LEN - 1] = '\0';
+ sstrncpy (set->type, name, sizeof (set->type));
set->ds_num = len + 1;
set->ds = ds;
- return plugin_register_data_set (set);
+
+ ret = plugin_register_data_set (set);
+
+ free (ds);
+ free (set);
+ return ret;
} /* static int pplugin_register_data_set (char *, SV *) */
/*
* type_instance => $tinstance,
* }
*/
-static int pplugin_dispatch_values (pTHX_ char *name, HV *values)
+static int pplugin_dispatch_values (pTHX_ HV *values)
{
value_list_t list = VALUE_LIST_INIT;
value_t *val = NULL;
int ret = 0;
- if ((NULL == name) || (NULL == values))
+ if (NULL == values)
+ return -1;
+
+ if (NULL == (tmp = hv_fetch (values, "type", 4, 0))) {
+ log_err ("pplugin_dispatch_values: No type given.");
return -1;
+ }
+
+ sstrncpy (list.type, SvPV_nolen (*tmp), sizeof (list.type));
if ((NULL == (tmp = hv_fetch (values, "values", 6, 0)))
|| (! (SvROK (*tmp) && (SVt_PVAV == SvTYPE (SvRV (*tmp)))))) {
val = (value_t *)smalloc (len * sizeof (value_t));
- list.values_len = av2value (aTHX_ name, (AV *)SvRV (*tmp), val, len);
+ list.values_len = av2value (aTHX_ list.type, (AV *)SvRV (*tmp),
+ val, len);
list.values = val;
if (-1 == list.values_len) {
}
if (NULL != (tmp = hv_fetch (values, "host", 4, 0))) {
- strncpy (list.host, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
- list.host[DATA_MAX_NAME_LEN - 1] = '\0';
+ sstrncpy (list.host, SvPV_nolen (*tmp), sizeof (list.host));
}
else {
strcpy (list.host, hostname_g);
}
- if (NULL != (tmp = hv_fetch (values, "plugin", 6, 0))) {
- strncpy (list.plugin, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
- list.plugin[DATA_MAX_NAME_LEN - 1] = '\0';
- }
+ if (NULL != (tmp = hv_fetch (values, "plugin", 6, 0)))
+ sstrncpy (list.plugin, SvPV_nolen (*tmp), sizeof (list.plugin));
- if (NULL != (tmp = hv_fetch (values,
- "plugin_instance", 15, 0))) {
- strncpy (list.plugin_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
- list.plugin_instance[DATA_MAX_NAME_LEN - 1] = '\0';
- }
+ if (NULL != (tmp = hv_fetch (values, "plugin_instance", 15, 0)))
+ sstrncpy (list.plugin_instance, SvPV_nolen (*tmp),
+ sizeof (list.plugin_instance));
- if (NULL != (tmp = hv_fetch (values, "type_instance", 13, 0))) {
- strncpy (list.type_instance, SvPV_nolen (*tmp), DATA_MAX_NAME_LEN);
- list.type_instance[DATA_MAX_NAME_LEN - 1] = '\0';
- }
+ if (NULL != (tmp = hv_fetch (values, "type_instance", 13, 0)))
+ sstrncpy (list.type_instance, SvPV_nolen (*tmp),
+ sizeof (list.type_instance));
- ret = plugin_dispatch_values (name, &list);
+ ret = plugin_dispatch_values (&list);
sfree (val);
return ret;
} /* static int pplugin_dispatch_values (char *, HV *) */
/*
+ * Dispatch a notification.
+ *
+ * notification:
+ * {
+ * severity => $severity,
+ * time => $time,
+ * message => $msg,
+ * host => $host,
+ * plugin => $plugin,
+ * type => $type,
+ * plugin_instance => $instance,
+ * type_instance => $type_instance
+ * }
+ */
+static int pplugin_dispatch_notification (pTHX_ HV *notif)
+{
+ notification_t n;
+
+ SV **tmp = NULL;
+
+ if (NULL == notif)
+ return -1;
+
+ memset (&n, 0, sizeof (n));
+
+ if (NULL != (tmp = hv_fetch (notif, "severity", 8, 0)))
+ n.severity = SvIV (*tmp);
+ else
+ n.severity = NOTIF_FAILURE;
+
+ if (NULL != (tmp = hv_fetch (notif, "time", 4, 0)))
+ n.time = (time_t)SvIV (*tmp);
+ else
+ n.time = time (NULL);
+
+ if (NULL != (tmp = hv_fetch (notif, "message", 7, 0)))
+ sstrncpy (n.message, SvPV_nolen (*tmp), sizeof (n.message));
+
+ if (NULL != (tmp = hv_fetch (notif, "host", 4, 0)))
+ sstrncpy (n.host, SvPV_nolen (*tmp), sizeof (n.host));
+ else
+ sstrncpy (n.host, hostname_g, sizeof (n.host));
+
+ if (NULL != (tmp = hv_fetch (notif, "plugin", 6, 0)))
+ sstrncpy (n.plugin, SvPV_nolen (*tmp), sizeof (n.plugin));
+
+ if (NULL != (tmp = hv_fetch (notif, "plugin_instance", 15, 0)))
+ sstrncpy (n.plugin_instance, SvPV_nolen (*tmp),
+ sizeof (n.plugin_instance));
+
+ if (NULL != (tmp = hv_fetch (notif, "type", 4, 0)))
+ sstrncpy (n.type, SvPV_nolen (*tmp), sizeof (n.type));
+
+ if (NULL != (tmp = hv_fetch (notif, "type_instance", 13, 0)))
+ sstrncpy (n.type_instance, SvPV_nolen (*tmp), sizeof (n.type_instance));
+ return plugin_dispatch_notification (&n);
+} /* static int pplugin_dispatch_notification (HV *) */
+
+/*
* Call all working functions of the given type.
*/
static int pplugin_call_all (pTHX_ int type, ...)
* time => $time,
* host => $hostname,
* plugin => $plugin,
+ * type => $type,
* plugin_instance => $instance,
* type_instance => $type_instance
* };
ds = va_arg (ap, data_set_t *);
vl = va_arg (ap, value_list_t *);
- if (-1 == data_set2av (aTHX_ ds, pds))
- return -1;
+ if (-1 == data_set2av (aTHX_ ds, pds)) {
+ av_clear (pds);
+ av_undef (pds);
+ pds = Nullav;
+ ret = -1;
+ }
- if (-1 == value_list2hv (aTHX_ vl, ds, pvl))
- return -1;
+ if (-1 == value_list2hv (aTHX_ vl, ds, pvl)) {
+ hv_clear (pvl);
+ hv_undef (pvl);
+ pvl = Nullhv;
+ ret = -1;
+ }
XPUSHs (sv_2mortal (newSVpv (ds->type, 0)));
XPUSHs (sv_2mortal (newRV_noinc ((SV *)pds)));
XPUSHs (sv_2mortal (newSViv (va_arg (ap, int))));
XPUSHs (sv_2mortal (newSVpv (va_arg (ap, char *), 0)));
}
+ else if (PLUGIN_NOTIF == type) {
+ /*
+ * $_[0] =
+ * {
+ * severity => $severity,
+ * time => $time,
+ * message => $msg,
+ * host => $host,
+ * plugin => $plugin,
+ * type => $type,
+ * plugin_instance => $instance,
+ * type_instance => $type_instance
+ * };
+ */
+ notification_t *n;
+ HV *notif = newHV ();
+
+ n = va_arg (ap, notification_t *);
+
+ if (-1 == notification2hv (aTHX_ n, notif)) {
+ hv_clear (notif);
+ hv_undef (notif);
+ notif = Nullhv;
+ ret = -1;
+ }
+
+ XPUSHs (sv_2mortal (newRV_noinc ((SV *)notif)));
+ }
PUTBACK;
log_debug ("Collectd::plugin_unregister_data_set: type = \"%s\"",
SvPV_nolen (ST (0)));
- if (0 == pplugin_unregister_data_set (SvPV_nolen (ST (1))))
+ if (0 == pplugin_unregister_data_set (SvPV_nolen (ST (0))))
XSRETURN_YES;
else
XSRETURN_EMPTY;
*/
static XS (Collectd_plugin_dispatch_values)
{
- SV *values = NULL;
+ SV *values = NULL;
+ int values_idx = 0;
int ret = 0;
dXSARGS;
- if (2 != items) {
- log_err ("Usage: Collectd::plugin_dispatch_values(name, values)");
+ if (2 == items) {
+ log_warn ("Collectd::plugin_dispatch_values with two arguments "
+ "is deprecated - pass the type through values->{type}.");
+ values_idx = 1;
+ }
+ else if (1 != items) {
+ log_err ("Usage: Collectd::plugin_dispatch_values(values)");
XSRETURN_EMPTY;
}
- log_debug ("Collectd::plugin_dispatch_values: "
- "name = \"%s\", values=\"%s\"",
- SvPV_nolen (ST (0)), SvPV_nolen (ST (1)));
+ log_debug ("Collectd::plugin_dispatch_values: values=\"%s\"",
+ SvPV_nolen (ST (values_idx)));
- values = ST (1);
+ values = ST (values_idx);
if (! (SvROK (values) && (SVt_PVHV == SvTYPE (SvRV (values))))) {
log_err ("Collectd::plugin_dispatch_values: Invalid values.");
XSRETURN_EMPTY;
}
- if ((NULL == ST (0)) || (NULL == values))
+ if (((2 == items) && (NULL == ST (0))) || (NULL == values))
+ XSRETURN_EMPTY;
+
+ if ((2 == items) && (NULL == hv_store ((HV *)SvRV (values), "type", 4,
+ newSVsv (ST (0)), 0))) {
+ log_err ("Collectd::plugin_dispatch_values: Could not store type.");
XSRETURN_EMPTY;
+ }
- ret = pplugin_dispatch_values (aTHX_ SvPV_nolen (ST (0)),
- (HV *)SvRV (values));
+ ret = pplugin_dispatch_values (aTHX_ (HV *)SvRV (values));
if (0 == ret)
XSRETURN_YES;
} /* static XS (Collectd_plugin_dispatch_values) */
/*
+ * Collectd::plugin_dispatch_notification (notif).
+ *
+ * notif:
+ * notification to dispatch
+ */
+static XS (Collectd_plugin_dispatch_notification)
+{
+ SV *notif = NULL;
+
+ int ret = 0;
+
+ dXSARGS;
+
+ if (1 != items) {
+ log_err ("Usage: Collectd::plugin_dispatch_notification(notif)");
+ XSRETURN_EMPTY;
+ }
+
+ log_debug ("Collectd::plugin_dispatch_notification: notif = \"%s\"",
+ SvPV_nolen (ST (0)));
+
+ notif = ST (0);
+
+ if (! (SvROK (notif) && (SVt_PVHV == SvTYPE (SvRV (notif))))) {
+ log_err ("Collectd::plugin_dispatch_notification: Invalid notif.");
+ XSRETURN_EMPTY;
+ }
+
+ ret = pplugin_dispatch_notification (aTHX_ (HV *)SvRV (notif));
+
+ if (0 == ret)
+ XSRETURN_YES;
+ else
+ XSRETURN_EMPTY;
+} /* static XS (Collectd_plugin_dispatch_notification) */
+
+/*
* Collectd::plugin_log (level, message).
*
* level:
} /* static XS (Collectd_plugin_log) */
/*
+ * Collectd::call_by_name (...).
+ *
+ * Call a Perl sub identified by its name passed through $Collectd::cb_name.
+ */
+static XS (Collectd_call_by_name)
+{
+ SV *tmp = NULL;
+ char *name = NULL;
+
+ if (NULL == (tmp = get_sv ("Collectd::cb_name", 0))) {
+ sv_setpv (get_sv ("@", 1), "cb_name has not been set");
+ CLEAR_STACK_FRAME;
+ return;
+ }
+
+ name = SvPV_nolen (tmp);
+
+ if (NULL == get_cv (name, 0)) {
+ sv_setpvf (get_sv ("@", 1), "unknown callback \"%s\"", name);
+ CLEAR_STACK_FRAME;
+ return;
+ }
+
+ /* simply pass on the subroutine call without touching the stack,
+ * thus leaving any arguments and return values in place */
+ call_pv (name, 0);
+} /* static XS (Collectd_call_by_name) */
+
+/*
+ * collectd's perl interpreter based thread implementation.
+ *
+ * This has been inspired by Perl's ithreads introduced in version 5.6.0.
+ */
+
+/* must be called with perl_threads->mutex locked */
+static void c_ithread_destroy (c_ithread_t *ithread)
+{
+ dTHXa (ithread->interp);
+
+ assert (NULL != perl_threads);
+
+ PERL_SET_CONTEXT (aTHX);
+ log_debug ("Shutting down Perl interpreter %p...", aTHX);
+
+#if COLLECT_DEBUG
+ sv_report_used ();
+
+ --perl_threads->number_of_threads;
+#endif /* COLLECT_DEBUG */
+
+ perl_destruct (aTHX);
+ perl_free (aTHX);
+
+ if (NULL == ithread->prev)
+ perl_threads->head = ithread->next;
+ else
+ ithread->prev->next = ithread->next;
+
+ if (NULL == ithread->next)
+ perl_threads->tail = ithread->prev;
+ else
+ ithread->next->prev = ithread->prev;
+
+ sfree (ithread);
+ return;
+} /* static void c_ithread_destroy (c_ithread_t *) */
+
+static void c_ithread_destructor (void *arg)
+{
+ c_ithread_t *ithread = (c_ithread_t *)arg;
+ c_ithread_t *t = NULL;
+
+ if (NULL == perl_threads)
+ return;
+
+ pthread_mutex_lock (&perl_threads->mutex);
+
+ for (t = perl_threads->head; NULL != t; t = t->next)
+ if (t == ithread)
+ break;
+
+ /* the ithread no longer exists */
+ if (NULL == t)
+ return;
+
+ c_ithread_destroy (ithread);
+
+ pthread_mutex_unlock (&perl_threads->mutex);
+ return;
+} /* static void c_ithread_destructor (void *) */
+
+/* must be called with perl_threads->mutex locked */
+static c_ithread_t *c_ithread_create (PerlInterpreter *base)
+{
+ c_ithread_t *t = NULL;
+ dTHXa (NULL);
+
+ assert (NULL != perl_threads);
+
+ t = (c_ithread_t *)smalloc (sizeof (c_ithread_t));
+ memset (t, 0, sizeof (c_ithread_t));
+
+ t->interp = (NULL == base)
+ ? NULL
+ : perl_clone (base, CLONEf_KEEP_PTR_TABLE);
+
+ aTHX = t->interp;
+
+ if (NULL != base) {
+ av_clear (PL_endav);
+ av_undef (PL_endav);
+ PL_endav = Nullav;
+ }
+
+#if COLLECT_DEBUG
+ ++perl_threads->number_of_threads;
+#endif /* COLLECT_DEBUG */
+
+ t->next = NULL;
+
+ if (NULL == perl_threads->tail) {
+ perl_threads->head = t;
+ t->prev = NULL;
+ }
+ else {
+ perl_threads->tail->next = t;
+ t->prev = perl_threads->tail;
+ }
+
+ perl_threads->tail = t;
+
+ pthread_setspecific (perl_thr_key, (const void *)t);
+ return t;
+} /* static c_ithread_t *c_ithread_create (PerlInterpreter *) */
+
+/*
* Interface to collectd.
*/
static int perl_init (void)
{
- dTHXa (NULL);
+ dTHX;
- if (NULL == perl)
+ if (NULL == perl_threads)
return 0;
- PERL_SET_CONTEXT (perl);
- aTHX = perl;
+ if (NULL == aTHX) {
+ c_ithread_t *t = NULL;
+
+ pthread_mutex_lock (&perl_threads->mutex);
+ t = c_ithread_create (perl_threads->head->interp);
+ pthread_mutex_unlock (&perl_threads->mutex);
+ aTHX = t->interp;
+ }
+
+ log_debug ("perl_init: c_ithread: interp = %p (active threads: %i)",
+ aTHX, perl_threads->number_of_threads);
return pplugin_call_all (aTHX_ PLUGIN_INIT);
} /* static int perl_init (void) */
static int perl_read (void)
{
- dTHXa (NULL);
+ dTHX;
- if (NULL == perl)
+ if (NULL == perl_threads)
return 0;
- PERL_SET_CONTEXT (perl);
- aTHX = perl;
+ if (NULL == aTHX) {
+ c_ithread_t *t = NULL;
+ pthread_mutex_lock (&perl_threads->mutex);
+ t = c_ithread_create (perl_threads->head->interp);
+ pthread_mutex_unlock (&perl_threads->mutex);
+
+ aTHX = t->interp;
+ }
+
+ log_debug ("perl_read: c_ithread: interp = %p (active threads: %i)",
+ aTHX, perl_threads->number_of_threads);
return pplugin_call_all (aTHX_ PLUGIN_READ);
} /* static int perl_read (void) */
static int perl_write (const data_set_t *ds, const value_list_t *vl)
{
- dTHXa (NULL);
+ dTHX;
- if (NULL == perl)
+ if (NULL == perl_threads)
return 0;
- PERL_SET_CONTEXT (perl);
- aTHX = perl;
+ if (NULL == aTHX) {
+ c_ithread_t *t = NULL;
+
+ pthread_mutex_lock (&perl_threads->mutex);
+ t = c_ithread_create (perl_threads->head->interp);
+ pthread_mutex_unlock (&perl_threads->mutex);
+
+ aTHX = t->interp;
+ }
+ log_debug ("perl_write: c_ithread: interp = %p (active threads: %i)",
+ aTHX, perl_threads->number_of_threads);
return pplugin_call_all (aTHX_ PLUGIN_WRITE, ds, vl);
} /* static int perl_write (const data_set_t *, const value_list_t *) */
static void perl_log (int level, const char *msg)
{
- dTHXa (NULL);
+ dTHX;
- if (NULL == perl)
+ if (NULL == perl_threads)
return;
- PERL_SET_CONTEXT (perl);
- aTHX = perl;
+ if (NULL == aTHX) {
+ c_ithread_t *t = NULL;
+
+ pthread_mutex_lock (&perl_threads->mutex);
+ t = c_ithread_create (perl_threads->head->interp);
+ pthread_mutex_unlock (&perl_threads->mutex);
+
+ aTHX = t->interp;
+ }
pplugin_call_all (aTHX_ PLUGIN_LOG, level, msg);
return;
} /* static void perl_log (int, const char *) */
+static int perl_notify (const notification_t *notif)
+{
+ dTHX;
+
+ if (NULL == perl_threads)
+ return 0;
+
+ if (NULL == aTHX) {
+ c_ithread_t *t = NULL;
+
+ pthread_mutex_lock (&perl_threads->mutex);
+ t = c_ithread_create (perl_threads->head->interp);
+ pthread_mutex_unlock (&perl_threads->mutex);
+
+ aTHX = t->interp;
+ }
+ return pplugin_call_all (aTHX_ PLUGIN_NOTIF, notif);
+} /* static int perl_notify (const notification_t *) */
+
static int perl_shutdown (void)
{
+ c_ithread_t *t = NULL;
+
int ret = 0;
- dTHXa (NULL);
+ dTHX;
plugin_unregister_complex_config ("perl");
- if (NULL == perl)
+ if (NULL == perl_threads)
return 0;
- PERL_SET_CONTEXT (perl);
- aTHX = perl;
+ if (NULL == aTHX) {
+ c_ithread_t *t = NULL;
+
+ pthread_mutex_lock (&perl_threads->mutex);
+ t = c_ithread_create (perl_threads->head->interp);
+ pthread_mutex_unlock (&perl_threads->mutex);
+
+ aTHX = t->interp;
+ }
+
+ log_debug ("perl_shutdown: c_ithread: interp = %p (active threads: %i)",
+ aTHX, perl_threads->number_of_threads);
plugin_unregister_log ("perl");
+ plugin_unregister_notification ("perl");
plugin_unregister_init ("perl");
plugin_unregister_read ("perl");
plugin_unregister_write ("perl");
ret = pplugin_call_all (aTHX_ PLUGIN_SHUTDOWN);
-#if COLLECT_DEBUG
- sv_report_used ();
-#endif /* COLLECT_DEBUG */
+ pthread_mutex_lock (&perl_threads->mutex);
+ t = perl_threads->tail;
- perl_destruct (perl);
- perl_free (perl);
- perl = NULL;
+ while (NULL != t) {
+ c_ithread_t *thr = t;
+
+ /* the pointer has to be advanced before destroying
+ * the thread as this will free the memory */
+ t = t->prev;
+
+ c_ithread_destroy (thr);
+ }
+
+ pthread_mutex_unlock (&perl_threads->mutex);
+ pthread_mutex_destroy (&perl_threads->mutex);
+
+ sfree (perl_threads);
+
+ pthread_key_delete (perl_thr_key);
PERL_SYS_TERM ();
return ret;
} /* static void perl_shutdown (void) */
+/*
+ * Access functions for global variables.
+ *
+ * These functions implement the "magic" used to access
+ * the global variables from Perl.
+ */
+
+static int g_pv_get (pTHX_ SV *var, MAGIC *mg)
+{
+ char *pv = mg->mg_ptr;
+ sv_setpv (var, pv);
+ return 0;
+} /* static int g_pv_get (pTHX_ SV *, MAGIC *) */
+
+static int g_pv_set (pTHX_ SV *var, MAGIC *mg)
+{
+ char *pv = mg->mg_ptr;
+ sstrncpy (pv, SvPV_nolen (var), DATA_MAX_NAME_LEN);
+ return 0;
+} /* static int g_pv_set (pTHX_ SV *, MAGIC *) */
+
+static int g_iv_get (pTHX_ SV *var, MAGIC *mg)
+{
+ int *iv = (int *)mg->mg_ptr;
+ sv_setiv (var, *iv);
+ return 0;
+} /* static int g_iv_get (pTHX_ SV *, MAGIC *) */
+
+static int g_iv_set (pTHX_ SV *var, MAGIC *mg)
+{
+ int *iv = (int *)mg->mg_ptr;
+ *iv = (int)SvIV (var);
+ return 0;
+} /* static int g_iv_set (pTHX_ SV *, MAGIC *) */
+
+static MGVTBL g_pv_vtbl = { g_pv_get, g_pv_set, NULL, NULL, NULL, NULL, NULL };
+static MGVTBL g_iv_vtbl = { g_iv_get, g_iv_set, NULL, NULL, NULL, NULL, NULL };
+
/* bootstrap the Collectd module */
static void xs_init (pTHX)
{
HV *stash = NULL;
+ SV *tmp = NULL;
char *file = __FILE__;
int i = 0;
/* export "constants" */
for (i = 0; '\0' != constants[i].name[0]; ++i)
newCONSTSUB (stash, constants[i].name, newSViv (constants[i].value));
+
+ /* export global variables
+ * by adding "magic" to the SV's representing the globale variables
+ * perl is able to automagically call the get/set function when
+ * accessing any such variable (this is basically the same as using
+ * tie() in Perl) */
+ /* global strings */
+ for (i = 0; '\0' != g_strings[i].name[0]; ++i) {
+ tmp = get_sv (g_strings[i].name, 1);
+ sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_pv_vtbl,
+ g_strings[i].var, 0);
+ }
+
+ /* global integers */
+ for (i = 0; '\0' != g_integers[i].name[0]; ++i) {
+ tmp = get_sv (g_integers[i].name, 1);
+ sv_magicext (tmp, NULL, PERL_MAGIC_ext, &g_iv_vtbl,
+ (char *)g_integers[i].var, 0);
+ }
return;
} /* static void xs_init (pTHX) */
{
dTHXa (NULL);
- if (NULL != perl)
+ if (NULL != perl_threads)
return 0;
log_info ("Initializing Perl interpreter...");
}
#endif /* COLLECT_DEBUG */
+ if (0 != pthread_key_create (&perl_thr_key, c_ithread_destructor)) {
+ log_err ("init_pi: pthread_key_create failed");
+
+ /* this must not happen - cowardly giving up if it does */
+ exit (1);
+ }
+
PERL_SYS_INIT3 (&argc, &argv, &environ);
- if (NULL == (perl = perl_alloc ())) {
- log_err ("module_register: Not enough memory.");
+ perl_threads = (c_ithread_list_t *)smalloc (sizeof (c_ithread_list_t));
+ memset (perl_threads, 0, sizeof (c_ithread_list_t));
+
+ pthread_mutex_init (&perl_threads->mutex, NULL);
+ /* locking the mutex should not be necessary at this point
+ * but let's just do it for the sake of completeness */
+ pthread_mutex_lock (&perl_threads->mutex);
+
+ perl_threads->head = c_ithread_create (NULL);
+ perl_threads->tail = perl_threads->head;
+
+ if (NULL == (perl_threads->head->interp = perl_alloc ())) {
+ log_err ("init_pi: Not enough memory.");
exit (3);
}
- aTHX = perl;
- perl_construct (perl);
+ aTHX = perl_threads->head->interp;
+ pthread_mutex_unlock (&perl_threads->mutex);
+
+ perl_construct (aTHX);
PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
- if (0 != perl_parse (perl, xs_init, argc, argv, NULL)) {
- log_err ("module_register: Unable to bootstrap Collectd.");
+ if (0 != perl_parse (aTHX_ xs_init, argc, argv, NULL)) {
+ log_err ("init_pi: Unable to bootstrap Collectd.");
exit (1);
}
/* Set $0 to "collectd" because perl_parse() has to set it to "-e". */
sv_setpv (get_sv ("0", 0), "collectd");
- perl_run (perl);
+ perl_run (aTHX);
plugin_register_log ("perl", perl_log);
+ plugin_register_notification ("perl", perl_notify);
plugin_register_init ("perl", perl_init);
plugin_register_read ("perl", perl_read);
char *value = NULL;
if ((0 != ci->children_num) || (1 != ci->values_num)
- || (OCONFIG_TYPE_STRING != ci->values[0].type))
+ || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
+ log_err ("LoadPlugin expects a single string argument.");
return 1;
+ }
value = ci->values[0].value.string;
}
init_pi (perl_argc, perl_argv);
- aTHX = perl;
+ assert (NULL != perl_threads);
+ assert (NULL != perl_threads->head);
+
+ aTHX = perl_threads->head->interp;
log_debug ("perl_config: loading perl plugin \"%s\"", value);
load_module (PERL_LOADMOD_NOIMPORT,
char *value = NULL;
if ((0 != ci->children_num) || (1 != ci->values_num)
- || (OCONFIG_TYPE_STRING != ci->values[0].type))
+ || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
+ log_err ("BaseName expects a single string argument.");
return 1;
+ }
value = ci->values[0].value.string;
log_debug ("perl_config: Setting plugin basename to \"%s\"", value);
- strncpy (base_name, value, sizeof (base_name));
- base_name[sizeof (base_name) - 1] = '\0';
+ sstrncpy (base_name, value, sizeof (base_name));
return 0;
} /* static int perl_config_basename (oconfig_item_it *) */
char *value = NULL;
if ((0 != ci->children_num) || (1 != ci->values_num)
- || (OCONFIG_TYPE_STRING != ci->values[0].type))
+ || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
+ log_err ("EnableDebugger expects a single string argument.");
+ return 1;
+ }
+
+ if (NULL != perl_threads) {
+ log_warn ("EnableDebugger has no effects if used after LoadPlugin.");
return 1;
+ }
value = ci->values[0].value.string;
char *value = NULL;
if ((0 != ci->children_num) || (1 != ci->values_num)
- || (OCONFIG_TYPE_STRING != ci->values[0].type))
+ || (OCONFIG_TYPE_STRING != ci->values[0].type)) {
+ log_err ("IncludeDir expects a single string argument.");
return 1;
+ }
value = ci->values[0].value.string;
{
int i = 0;
- dTHXa (NULL);
+ dTHX;
- PERL_SET_CONTEXT (perl);
- aTHX = perl;
+ /* dTHX does not get any valid values in case Perl
+ * has not been initialized */
+ if (NULL == perl_threads)
+ aTHX = NULL;
for (i = 0; i < ci->children_num; ++i) {
oconfig_item_t *c = ci->children + i;
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