commit 97f66e2b534e2a54c63360a3f8134a0189c54e25
author Holger Hans Peter Freyther <zecke@selfish.org> Wed Jul 28 03:32:52 2010 +0800
committer Holger Hans Peter Freyther <zecke@selfish.org> Wed Jul 28 03:36:32 2010 +0800
tree 903e34443767b09ef1d11575f8a1502f6295c7fd

Public release of the cellmgr_ng code to convert E1 to IPA SCCP

src/thread.c

diff --git a/src/thread.c b/src/thread.c
new file mode 100644
index 0000000..8175a49
--- /dev/null
+++ b/src/thread.c
@@ -0,0 +1,100 @@
+/*
+ * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * 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 <thread.h>
+
+#include <laf0rge1/talloc.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include <string.h>
+#include <unistd.h>
+
+static void *tall_ctx_thr;
+
+static int thread_finish(struct thread_notifier *not)
+{
+	pthread_mutex_destroy(&not->guard);
+	close(not->fd[0]);
+	close(not->fd[1]);
+
+	return 0;
+}
+
+void thread_init(void)
+{
+	tall_ctx_thr = talloc_named_const(NULL, 1, "threads");
+}
+
+struct thread_notifier *thread_notifier_alloc()
+{
+	struct thread_notifier *not = talloc_zero(tall_ctx_thr, struct thread_notifier);
+	if (!not)
+		return NULL;
+
+	if (socketpair(AF_UNIX, SOCK_STREAM, 0, not->fd) == -1) {
+		talloc_free(not);
+		return NULL;
+	}
+
+	if (pthread_mutex_init(&not->guard, NULL) != 0) {
+		close(not->fd[0]);
+		close(not->fd[1]);
+		talloc_free(not);
+		return NULL;
+	}
+
+	not->bfd.fd = not->fd[1];
+	INIT_LLIST_HEAD(&not->__head1);
+	INIT_LLIST_HEAD(&not->__head2);
+	not->main_head = &not->__head1;
+	not->thread_head = &not->__head2;
+	talloc_set_destructor(not, thread_finish);
+	return not;
+}
+
+void thread_safe_add(struct thread_notifier *not, struct llist_head *_new)
+{
+	char c;
+	pthread_mutex_lock(&not->guard);
+
+	llist_add_tail(_new, not->thread_head);
+	if (!not->no_write && write(not->fd[0], &c, sizeof(c)) != 1) {
+		fprintf(stderr, "BAD NEWS. Socket write failed.\n");
+	}
+
+	pthread_mutex_unlock(&not->guard);
+}
+
+void thread_swap(struct thread_notifier *not)
+{
+	pthread_mutex_lock(&not->guard);
+
+	if (not->main_head == &not->__head1) {
+		not->main_head = &not->__head2;
+		not->thread_head = &not->__head1;
+	} else {
+		not->main_head = &not->__head1;
+		not->thread_head = &not->__head2;
+	}
+
+	pthread_mutex_unlock(&not->guard);
+}