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/*
pidwait.c :
Copyright (C) 1999-2000 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
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "module.h"
#include "signals.h"
#include "modules.h"
static GHashTable *child_pids;
static GSList *pids;
static int signal_pidwait;
static void sig_child(GPid pid, gint status, gpointer data)
{
signal_emit_id(signal_pidwait, 2, GINT_TO_POINTER(pid),
GINT_TO_POINTER(status));
g_hash_table_remove(child_pids, GINT_TO_POINTER(pid));
pids = g_slist_remove(pids, GINT_TO_POINTER(pid));
}
/* add a pid to wait list */
void pidwait_add(int pid)
{
if (g_hash_table_lookup(child_pids, GINT_TO_POINTER(pid)) == NULL) {
int id = g_child_watch_add_full(10, pid, sig_child, NULL, NULL);
g_hash_table_insert(child_pids, GINT_TO_POINTER(pid), GINT_TO_POINTER(id));
pids = g_slist_append(pids, GINT_TO_POINTER(pid));
}
}
/* remove pid from wait list */
void pidwait_remove(int pid)
{
gpointer id = g_hash_table_lookup(child_pids, GINT_TO_POINTER(pid));
if (id != NULL) {
g_source_remove(GPOINTER_TO_INT(id));
g_hash_table_remove(child_pids, GINT_TO_POINTER(pid));
pids = g_slist_remove(pids, GINT_TO_POINTER(pid));
}
}
/* return list of pids that are being waited.
don't free the return value. */
GSList *pidwait_get_pids(void)
{
return pids;
}
void pidwait_init(void)
{
child_pids = g_hash_table_new(g_direct_hash, g_direct_equal);
pids = NULL;
signal_pidwait = signal_get_uniq_id("pidwait");
}
void pidwait_deinit(void)
{
g_hash_table_destroy(child_pids);
g_slist_free(pids);
}
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