ipcpd: Add condition variable to IPCP state

This adds a condition variable to the IPCP state, so that upon state
changes any listeners to state changes can be notified. It also
replaces the read/write lock with a mutex in order to be able to do
so.

1 files changed, 12 insertions, 1 deletions

diff --git a/src/ipcpd/ipcp.c b/src/ipcpd/ipcp.c
index 24f580e5..5c066cb0 100644
--- a/src/ipcpd/ipcp.c
+++ b/src/ipcpd/ipcp.c
@@ -42,11 +42,22 @@ struct ipcp * ipcp_instance_create()
         i->irmd_fd = -1;
         i->state   = IPCP_INIT;
 
-        pthread_rwlock_init(&i->state_lock, NULL);
+        pthread_mutex_init(&i->state_lock, NULL);
+        pthread_cond_init(&i->state_cond, NULL);
 
         return i;
 }
 
+void ipcp_state_change(struct ipcp * ipcp,
+                       enum ipcp_state state)
+{
+        if (ipcp == NULL)
+            return;
+
+        ipcp->state = state;
+        pthread_cond_broadcast(&ipcp->state_cond);
+}
+
 int ipcp_parse_arg(int argc, char * argv[])
 {
         char * log_file;