Improve the sig_handler function

Add new enumeration with reasons for stopping memcached.
Make sure that restart_mmap_close gets called only when the right
signal is received.
Improve logging to stderr so user knows why exactly memcached
stopped.

1 files changed, 6 insertions, 0 deletions

diff --git a/memcached.h b/memcached.h
index fe53afb..3254afa 100644
--- a/memcached.h
+++ b/memcached.h
@@ -233,6 +233,12 @@ enum pause_thread_types {
     RESUME_WORKER_THREADS
 };
 
+enum stop_reasons {
+    NOT_STOP,
+    GRACE_STOP,
+    EXIT_NORMALLY
+};
+
 #define IS_TCP(x) (x == tcp_transport)
 #define IS_UDP(x) (x == udp_transport)