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mirror of https://github.com/irssi/irssi.git synced 2024-10-13 05:03:45 -04:00

Rewritten signal handling code - it wasn't supposed to come before 0.9 irssi

but it doesn't break much things and is needed for Qt port :)


git-svn-id: http://svn.irssi.org/repos/irssi/trunk@2682 dbcabf3a-b0e7-0310-adc4-f8d773084564
This commit is contained in:
Timo Sirainen 2002-04-15 13:59:09 +00:00 committed by cras
parent 15667ec7ff
commit 8b9c4823bf
6 changed files with 226 additions and 189 deletions

View File

@ -154,7 +154,7 @@ void command_bind_to(const char *module, int pos, const char *cmd,
if (func != NULL) {
str = g_strconcat("command ", cmd, NULL);
signal_add_to(module, pos, str, func);
signal_add_full(module, pos, str, func, NULL);
g_free(str);
}

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@ -179,7 +179,8 @@ void expando_bind(const char *key, int funccount, SIGNAL_FUNC *funcs)
func = arg < funccount ? funcs[arg] : NULL;
if (func == NULL) func = funcs[EXPANDO_ARG_NONE];
signal_add_to_id(MODULE_NAME, 1, rec->signal_ids[n], func);
signal_add_full_id(MODULE_NAME, 1, rec->signal_ids[n],
func, NULL);
}
}
@ -208,7 +209,7 @@ void expando_unbind(const char *key, int funccount, SIGNAL_FUNC *funcs)
func = arg < funccount ? funcs[arg] : NULL;
if (func == NULL) func = funcs[EXPANDO_ARG_NONE];
signal_remove_id(rec->signal_ids[n], func);
signal_remove_id(rec->signal_ids[n], func, NULL);
}
}

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@ -1,7 +1,7 @@
/*
signals.c : irssi
Copyright (C) 1999 Timo Sirainen
Copyright (C) 1999-2002 Timo Sirainen
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
@ -18,179 +18,205 @@
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../common.h"
#include "module.h"
#include "signals.h"
#include "modules.h"
#define SIGNAL_LISTS 3
typedef struct _SignalHook {
struct _SignalHook *next;
int priority;
const char *module;
SIGNAL_FUNC func;
void *user_data;
} SignalHook;
typedef struct {
int id; /* signal id */
int refcount;
int emitting; /* signal is being emitted */
int stop_emit; /* this signal was stopped */
int remove_count; /* hooks were removed from signal */
GPtrArray *modulelist[SIGNAL_LISTS]; /* list of what signals belong
to which module */
GPtrArray *siglist[SIGNAL_LISTS]; /* signal lists */
} SIGNAL_REC;
SignalHook *hooks;
} Signal;
#define signal_is_emitlist_empty(a) \
(!(a)->siglist[0] && !(a)->siglist[1] && !(a)->siglist[2])
static GMemChunk *signals_chunk;
void *signal_user_data;
static GHashTable *signals;
static SIGNAL_REC *current_emitted_signal;
static Signal *current_emitted_signal;
#define signal_ref(signal) ++(signal)->refcount
#define signal_unref(rec) (signal_unref_full(rec, TRUE))
#define signal_unref(signal) (signal_unref_full(signal, TRUE))
static int signal_unref_full(SIGNAL_REC *rec, int remove_hash)
static int signal_unref_full(Signal *rec, int remove)
{
if (rec->refcount == 0) {
g_error("signal_unref(%s) : BUG - reference counter == 0",
signal_get_id_str(rec->id));
}
g_assert(rec->refcount > 0);
if (--rec->refcount != 0)
return FALSE;
return TRUE;
/* remove whole signal from memory */
if (!signal_is_emitlist_empty(rec)) {
g_error("signal_unref(%s) : BUG - emitlist wasn't empty",
if (rec->hooks != NULL) {
g_error("signal_unref(%s) : BUG - hook list wasn't empty",
signal_get_id_str(rec->id));
}
if (remove_hash)
if (remove)
g_hash_table_remove(signals, GINT_TO_POINTER(rec->id));
g_mem_chunk_free(signals_chunk, rec);
return TRUE;
g_free(rec);
return FALSE;
}
static void signal_unref_count(SIGNAL_REC *rec, int count)
static void signal_hash_ref(void *key, Signal *rec)
{
while (count-- > 0)
signal_unref(rec);
signal_ref(rec);
}
void signal_add_to(const char *module, int pos,
const char *signal, SIGNAL_FUNC func)
static int signal_hash_unref(void *key, Signal *rec)
{
g_return_if_fail(signal != NULL);
return !signal_unref_full(rec, FALSE);
}
signal_add_to_id(module, pos, signal_get_uniq_id(signal), func);
void signal_add_full(const char *module, int priority,
const char *signal, SIGNAL_FUNC func, void *user_data)
{
signal_add_full_id(module, priority, signal_get_uniq_id(signal),
func, user_data);
}
/* bind a signal */
void signal_add_to_id(const char *module, int pos,
int signal_id, SIGNAL_FUNC func)
void signal_add_full_id(const char *module, int priority,
int signal_id, SIGNAL_FUNC func, void *user_data)
{
SIGNAL_REC *rec;
Signal *signal;
SignalHook *hook, **tmp;
g_return_if_fail(signal_id >= 0);
g_return_if_fail(func != NULL);
g_return_if_fail(pos >= 0 && pos < SIGNAL_LISTS);
rec = g_hash_table_lookup(signals, GINT_TO_POINTER(signal_id));
if (rec == NULL) {
rec = g_mem_chunk_alloc0(signals_chunk);
rec->id = signal_id;
g_hash_table_insert(signals, GINT_TO_POINTER(signal_id), rec);
signal = g_hash_table_lookup(signals, GINT_TO_POINTER(signal_id));
if (signal == NULL) {
/* new signal */
signal = g_new0(Signal, 1);
signal->id = signal_id;
g_hash_table_insert(signals, GINT_TO_POINTER(signal_id), signal);
}
if (rec->siglist[pos] == NULL) {
rec->siglist[pos] = g_ptr_array_new();
rec->modulelist[pos] = g_ptr_array_new();
hook = g_new0(SignalHook, 1);
hook->priority = priority;
hook->module = module;
hook->func = func;
hook->user_data = user_data;
/* insert signal to proper position in list */
for (tmp = &signal->hooks; ; tmp = &(*tmp)->next) {
if (*tmp == NULL) {
/* last in list */
*tmp = hook;
break;
} else if (priority <= (*tmp)->priority) {
/* insert before others with same priority */
hook->next = *tmp;
*tmp = hook;
break;
}
}
g_ptr_array_add(rec->siglist[pos], (void *) func);
g_ptr_array_add(rec->modulelist[pos], (void *) module);
signal_ref(rec);
signal_ref(signal);
}
static int signal_list_find(GPtrArray *array, void *data)
static void signal_remove_hook(Signal *rec, SignalHook **hook_pos)
{
unsigned int n;
SignalHook *hook;
for (n = 0; n < array->len; n++) {
if (g_ptr_array_index(array, n) == data)
return n;
}
hook = *hook_pos;
*hook_pos = hook->next;
return -1;
}
static void signal_list_free(SIGNAL_REC *rec, int list)
{
g_ptr_array_free(rec->siglist[list], TRUE);
g_ptr_array_free(rec->modulelist[list], TRUE);
rec->siglist[list] = NULL;
rec->modulelist[list] = NULL;
}
/* Returns TRUE if the whole signal is removed after this remove */
static void signal_remove_from_list(SIGNAL_REC *rec, int list, int index)
{
g_ptr_array_remove_index(rec->siglist[list], index);
g_ptr_array_remove_index(rec->modulelist[list], index);
if (rec->siglist[list]->len == 0)
signal_list_free(rec, list);
g_free(hook);
signal_unref(rec);
}
/* Remove signal from emit lists */
static int signal_remove_from_lists(SIGNAL_REC *rec, SIGNAL_FUNC func)
/* Remove function from signal's emit list */
static int signal_remove_func(Signal *rec, SIGNAL_FUNC func, void *user_data)
{
int n, index;
SignalHook **hook;
for (n = 0; n < SIGNAL_LISTS; n++) {
if (rec->siglist[n] == NULL)
continue;
index = signal_list_find(rec->siglist[n], (void *) func);
if (index != -1) {
/* remove the function from emit list */
signal_remove_from_list(rec, n, index);
return 1;
for (hook = &rec->hooks; *hook != NULL; hook = &(*hook)->next) {
if ((*hook)->func == func && (*hook)->user_data == user_data) {
if (rec->emitting) {
/* mark it removed after emitting is done */
(*hook)->func = NULL;
rec->remove_count++;
} else {
/* remove the function from emit list */
signal_remove_hook(rec, hook);
}
return TRUE;
}
}
return 0;
return FALSE;
}
void signal_remove_id(int signal_id, SIGNAL_FUNC func)
void signal_remove_id(int signal_id, SIGNAL_FUNC func, void *user_data)
{
SIGNAL_REC *rec;
Signal *rec;
g_return_if_fail(signal_id >= 0);
g_return_if_fail(func != NULL);
rec = g_hash_table_lookup(signals, GINT_TO_POINTER(signal_id));
if (rec != NULL)
signal_remove_from_lists(rec, func);
signal_remove_func(rec, func, user_data);
}
/* unbind signal */
void signal_remove(const char *signal, SIGNAL_FUNC func)
void signal_remove_full(const char *signal, SIGNAL_FUNC func, void *user_data)
{
g_return_if_fail(signal != NULL);
signal_remove_id(signal_get_uniq_id(signal), func);
signal_remove_id(signal_get_uniq_id(signal), func, user_data);
}
static int signal_emit_real(SIGNAL_REC *rec, int params, va_list va)
static void signal_hooks_clean(Signal *rec)
{
gconstpointer arglist[SIGNAL_MAX_ARGUMENTS];
SIGNAL_REC *prev_emitted_signal;
SIGNAL_FUNC func;
int n, index, stopped, stop_emit_count;
SignalHook **hook, **next;
int count;
for (n = 0; n < SIGNAL_MAX_ARGUMENTS; n++)
arglist[n] = n >= params ? NULL : va_arg(va, gconstpointer);
count = rec->remove_count;
rec->remove_count = 0;
for (hook = &rec->hooks; *hook != NULL; hook = next) {
next = &(*hook)->next;
if ((*hook)->func == NULL) {
next = hook;
signal_remove_hook(rec, hook);
if (--count == 0)
break;
}
}
}
static int signal_emit_real(Signal *rec, int params, va_list va)
{
const void *arglist[SIGNAL_MAX_ARGUMENTS];
Signal *prev_emitted_signal;
SignalHook *hook;
int i, stopped, stop_emit_count;
for (i = 0; i < SIGNAL_MAX_ARGUMENTS; i++)
arglist[i] = i >= params ? NULL : va_arg(va, const void *);
/* signal_stop_by_name("signal"); signal_emit("signal", ...);
fails if we compare rec->stop_emit against 0. */
@ -200,37 +226,39 @@ static int signal_emit_real(SIGNAL_REC *rec, int params, va_list va)
stopped = FALSE;
rec->emitting++;
for (n = 0; n < SIGNAL_LISTS; n++) {
/* run signals in emit lists */
if (rec->siglist[n] == NULL)
continue;
for (index = rec->siglist[n]->len-1; index >= 0; index--) {
func = (SIGNAL_FUNC) g_ptr_array_index(rec->siglist[n], index);
for (hook = rec->hooks; hook != NULL; hook = hook->next) {
if (hook->func == NULL)
continue; /* removed */
prev_emitted_signal = current_emitted_signal;
current_emitted_signal = rec;
prev_emitted_signal = current_emitted_signal;
current_emitted_signal = rec;
#if SIGNAL_MAX_ARGUMENTS != 6
# error SIGNAL_MAX_ARGUMENTS changed - update code
#endif
func(arglist[0], arglist[1], arglist[2], arglist[3], arglist[4], arglist[5]);
current_emitted_signal = prev_emitted_signal;
signal_user_data = hook->user_data;
hook->func(arglist[0], arglist[1], arglist[2], arglist[3],
arglist[4], arglist[5]);
if (rec->stop_emit != stop_emit_count) {
stopped = TRUE;
rec->stop_emit--;
n = SIGNAL_LISTS;
break;
}
current_emitted_signal = prev_emitted_signal;
if (rec->stop_emit != stop_emit_count) {
stopped = TRUE;
rec->stop_emit--;
break;
}
}
rec->emitting--;
signal_user_data = NULL;
if (!rec->emitting) {
if (rec->stop_emit != 0) {
/* signal_stop() used too many times */
rec->stop_emit = 0;
}
if (rec->remove_count > 0)
signal_hooks_clean(rec);
}
signal_unref(rec);
@ -239,7 +267,7 @@ static int signal_emit_real(SIGNAL_REC *rec, int params, va_list va)
int signal_emit(const char *signal, int params, ...)
{
SIGNAL_REC *rec;
Signal *rec;
va_list va;
int signal_id;
@ -259,7 +287,7 @@ int signal_emit(const char *signal, int params, ...)
int signal_emit_id(int signal_id, int params, ...)
{
SIGNAL_REC *rec;
Signal *rec;
va_list va;
g_return_val_if_fail(signal_id >= 0, FALSE);
@ -278,7 +306,7 @@ int signal_emit_id(int signal_id, int params, ...)
/* stop the current ongoing signal emission */
void signal_stop(void)
{
SIGNAL_REC *rec;
Signal *rec;
rec = current_emitted_signal;
if (rec == NULL)
@ -290,7 +318,7 @@ void signal_stop(void)
/* stop ongoing signal emission by signal name */
void signal_stop_by_name(const char *signal)
{
SIGNAL_REC *rec;
Signal *rec;
int signal_id;
signal_id = signal_get_uniq_id(signal);
@ -310,7 +338,7 @@ const char *signal_get_emitted(void)
/* return the ID of the signal that is currently being emitted */
int signal_get_emitted_id(void)
{
SIGNAL_REC *rec;
Signal *rec;
rec = current_emitted_signal;
g_return_val_if_fail(rec != NULL, -1);
@ -320,7 +348,7 @@ int signal_get_emitted_id(void)
/* return TRUE if specified signal was stopped */
int signal_is_stopped(int signal_id)
{
SIGNAL_REC *rec;
Signal *rec;
rec = g_hash_table_lookup(signals, GINT_TO_POINTER(signal_id));
g_return_val_if_fail(rec != NULL, FALSE);
@ -328,73 +356,56 @@ int signal_is_stopped(int signal_id)
return rec->emitting <= rec->stop_emit;
}
static void signal_remove_module(void *signal, SIGNAL_REC *rec,
static void signal_remove_module(void *signal, Signal *rec,
const char *module)
{
unsigned int index;
int list;
SignalHook **hook, **next;
for (list = 0; list < SIGNAL_LISTS; list++) {
if (rec->modulelist[list] == NULL)
continue;
for (hook = &rec->hooks; *hook != NULL; hook = next) {
next = &(*hook)->next;
for (index = rec->modulelist[list]->len; index > 0; index--)
if (g_strcasecmp(g_ptr_array_index(rec->modulelist[list], index-1), module) == 0)
signal_remove_from_list(rec, list, index-1);
if (strcasecmp((*hook)->module, module) == 0) {
next = hook;
signal_remove_hook(rec, hook);
}
}
}
static void signal_foreach_ref(void *signal, SIGNAL_REC *rec)
{
signal_ref(rec);
}
static int signal_foreach_unref(void *signal, SIGNAL_REC *rec)
{
return signal_unref_full(rec, FALSE);
}
/* remove all signals that belong to `module' */
void signals_remove_module(const char *module)
{
g_return_if_fail(module != NULL);
g_hash_table_foreach(signals, (GHFunc) signal_foreach_ref, NULL);
g_hash_table_foreach(signals, (GHFunc) signal_remove_module, (void *) module);
g_hash_table_foreach_remove(signals, (GHRFunc) signal_foreach_unref, NULL);
g_hash_table_foreach(signals, (GHFunc) signal_hash_ref, NULL);
g_hash_table_foreach(signals, (GHFunc) signal_remove_module,
(void *) module);
g_hash_table_foreach_remove(signals, (GHRFunc) signal_hash_unref, NULL);
}
void signals_init(void)
{
signals_chunk = g_mem_chunk_new("signals", sizeof(SIGNAL_REC),
sizeof(SIGNAL_REC)*200, G_ALLOC_AND_FREE);
signals = g_hash_table_new((GHashFunc) g_direct_hash, (GCompareFunc) g_direct_equal);
signals = g_hash_table_new(NULL, NULL);
}
static void signal_free(void *key, SIGNAL_REC *rec)
static void signal_free(void *key, Signal *rec)
{
int n;
g_warning("signal_free(%s) : signal still has %d references:",
signal_get_id_str(rec->id), rec->refcount);
signal_ref(rec);
while (rec->hooks != NULL) {
g_warning(" - module '%s' function %p",
rec->hooks->module, rec->hooks->func);
for (n = 0; n < SIGNAL_LISTS; n++) {
if (rec->siglist[n] != NULL) {
signal_unref_count(rec, rec->siglist[n]->len);
signal_list_free(rec, n);
}
}
if (!signal_unref_full(rec, FALSE)) {
g_error("signal_free(%s) : BUG - signal still has %d references",
signal_get_id_str(rec->id), rec->refcount);
signal_remove_hook(rec, &rec->hooks);
}
}
void signals_deinit(void)
{
g_hash_table_foreach(signals, (GHFunc) signal_free, NULL);
g_hash_table_foreach(signals, (GHFunc) signal_hash_ref, NULL);
g_hash_table_foreach(signals, (GHFunc) signal_free, NULL);
g_hash_table_foreach_remove(signals, (GHRFunc) signal_hash_unref, NULL);
g_hash_table_destroy(signals);
module_uniq_destroy("signals");
g_mem_chunk_destroy(signals_chunk);
}

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@ -1,33 +1,43 @@
#ifndef __SIGNAL_H
#define __SIGNAL_H
#define SIGNAL_PRIORITY_LOW 100
#define SIGNAL_PRIORITY_DEFAULT 0
#define SIGNAL_PRIORITY_HIGH -100
#define SIGNAL_MAX_ARGUMENTS 6
typedef void (*SIGNAL_FUNC) (gconstpointer, gconstpointer,
gconstpointer, gconstpointer,
gconstpointer, gconstpointer);
typedef void (*SIGNAL_FUNC) (const void *, const void *,
const void *, const void *,
const void *, const void *);
void signals_init(void);
void signals_deinit(void);
/* signal name -> ID */
#define signal_get_uniq_id(signal) \
module_get_uniq_id_str("signals", signal)
/* signal ID -> name */
#define signal_get_id_str(signal_id) \
module_find_id_str("signals", signal_id)
extern void *signal_user_data; /* use signal_get_user_data() macro to access */
/* bind a signal */
void signal_add_to(const char *module, int pos,
const char *signal, SIGNAL_FUNC func);
void signal_add_to_id(const char *module, int pos,
int signal, SIGNAL_FUNC func);
#define signal_add(a, b) signal_add_to(MODULE_NAME, 1, a, b)
#define signal_add_first(a, b) signal_add_to(MODULE_NAME, 0, a, b)
#define signal_add_last(a, b) signal_add_to(MODULE_NAME, 2, a, b)
void signal_add_full(const char *module, int priority,
const char *signal, SIGNAL_FUNC func, void *user_data);
void signal_add_full_id(const char *module, int priority,
int signal, SIGNAL_FUNC func, void *user_data);
#define signal_add(signal, func) \
signal_add_full(MODULE_NAME, SIGNAL_PRIORITY_DEFAULT, (signal), (SIGNAL_FUNC) (func), NULL)
#define signal_add_first(signal, func) \
signal_add_full(MODULE_NAME, SIGNAL_PRIORITY_HIGH, (signal), (SIGNAL_FUNC) (func), NULL)
#define signal_add_last(signal, func) \
signal_add_full(MODULE_NAME, SIGNAL_PRIORITY_LOW, (signal), (SIGNAL_FUNC) (func), NULL)
#define signal_add_data(signal, func, data) \
signal_add_full(MODULE_NAME, SIGNAL_PRIORITY_DEFAULT, (signal), (SIGNAL_FUNC) (func), data)
#define signal_add_first_data(signal, func, data) \
signal_add_full(MODULE_NAME, SIGNAL_PRIORITY_HIGH, (signal), (SIGNAL_FUNC) (func), data)
#define signal_add_last_data(signal, func, data) \
signal_add_full(MODULE_NAME, SIGNAL_PRIORITY_LOW, (signal), (SIGNAL_FUNC) (func), data)
/* unbind signal */
void signal_remove(const char *signal, SIGNAL_FUNC func);
void signal_remove_id(int signal_id, SIGNAL_FUNC func);
void signal_remove_full(const char *signal, SIGNAL_FUNC func, void *user_data);
#define signal_remove(signal, func) \
signal_remove_full((signal), (SIGNAL_FUNC) (func), NULL)
#define signal_remove_data(signal, func, data) \
signal_remove_full((signal), (SIGNAL_FUNC) (func), data)
void signal_remove_id(int signal_id, SIGNAL_FUNC func, void *user_data);
/* emit signal */
int signal_emit(const char *signal, int params, ...);
@ -44,8 +54,20 @@ const char *signal_get_emitted(void);
int signal_get_emitted_id(void);
/* return TRUE if specified signal was stopped */
int signal_is_stopped(int signal_id);
/* return the user data of the signal function currently being emitted */
#define signal_get_user_data() signal_user_data
/* remove all signals that belong to `module' */
void signals_remove_module(const char *module);
/* signal name -> ID */
#define signal_get_uniq_id(signal) \
module_get_uniq_id_str("signals", signal)
/* signal ID -> name */
#define signal_get_id_str(signal_id) \
module_find_id_str("signals", signal_id)
void signals_init(void);
void signals_deinit(void);
#endif

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@ -859,8 +859,10 @@ static void statusbar_item_default_signals(SBAR_ITEM_REC *item)
func = NULL;
break;
}
if (func != NULL)
signal_add_to_id(MODULE_NAME, 1, *pos, func);
if (func != NULL) {
signal_add_full_id(MODULE_NAME, 1,
*pos, func, NULL);
}
}
if (g_slist_find(list, item) == NULL)
@ -911,10 +913,10 @@ SBAR_ITEM_REC *statusbar_item_create(STATUSBAR_REC *bar,
static void statusbar_signal_remove(int signal_id)
{
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_item);
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_server);
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_window);
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_window_item);
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_item, NULL);
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_server, NULL);
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_window, NULL);
signal_remove_id(signal_id, (SIGNAL_FUNC) statusbar_update_window_item, NULL);
}
static void statusbar_item_remove_signal(SBAR_ITEM_REC *item, int signal_id)

View File

@ -288,8 +288,8 @@ static void perl_signal_add_to_int(const char *signal, SV *func,
g_hash_table_insert(table, signal_idp, siglist);
if (!command) {
signal_add_to_id(MODULE_NAME, priority, rec->signal_id,
perl_signal_get_func(rec));
signal_add_full_id(MODULE_NAME, priority, rec->signal_id,
perl_signal_get_func(rec), NULL);
}
}
@ -321,7 +321,7 @@ static void perl_signal_remove_list_one(GSList **siglist, PERL_SIGNAL_REC *rec)
*siglist = g_slist_remove(*siglist, rec);
if (*siglist == NULL) {
signal_remove_id(rec->signal_id, perl_signal_get_func(rec));
signal_remove_id(rec->signal_id, perl_signal_get_func(rec), NULL);
g_free(siglist);
g_hash_table_remove(signals[rec->priority], signal_idp);
}
@ -407,7 +407,8 @@ static int signal_destroy_hash(void *key, GSList **list, PERL_SCRIPT_REC *script
*list = g_slist_remove(*list, rec);
if (*list == NULL) {
signal_remove_id(rec->signal_id,
perl_signal_get_func(rec));
perl_signal_get_func(rec),
NULL);
}
perl_signal_destroy(rec);
}