chdir-notify: add function to unregister listeners
While we (obviously) have a way to register new listeners that get
called whenever we chdir(3p), we don't have an equivalent that can be
used to unregister such a listener again.
Add one, as it will be required in a subsequent commit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/chdir-notify.c b/chdir-notify.c
index 0d7bc04..f8bfe3c 100644
--- a/chdir-notify.c
+++ b/chdir-notify.c
@@ -25,6 +25,24 @@ void chdir_notify_register(const char *name,
list_add_tail(&e->list, &chdir_notify_entries);
}
+void chdir_notify_unregister(const char *name, chdir_notify_callback cb,
+ void *data)
+{
+ struct list_head *pos, *p;
+
+ list_for_each_safe(pos, p, &chdir_notify_entries) {
+ struct chdir_notify_entry *e =
+ list_entry(pos, struct chdir_notify_entry, list);
+
+ if (e->cb != cb || e->data != data || !e->name != !name ||
+ (e->name && strcmp(e->name, name)))
+ continue;
+
+ list_del(pos);
+ free(e);
+ }
+}
+
static void reparent_cb(const char *name,
const char *old_cwd,
const char *new_cwd,
diff --git a/chdir-notify.h b/chdir-notify.h
index 366e4c1..81eb69d 100644
--- a/chdir-notify.h
+++ b/chdir-notify.h
@@ -41,6 +41,8 @@ typedef void (*chdir_notify_callback)(const char *name,
const char *new_cwd,
void *data);
void chdir_notify_register(const char *name, chdir_notify_callback cb, void *data);
+void chdir_notify_unregister(const char *name, chdir_notify_callback cb,
+ void *data);
void chdir_notify_reparent(const char *name, char **path);
/*
