treewide: Remove trailing whitespace

[sliver-openvswitch.git] / lib / fatal-signal.c

diff --git a/lib/fatal-signal.c b/lib/fatal-signal.c
index f6f913e..3f118f8 100644 (file)
--- a/lib/fatal-signal.c
+++ b/lib/fatal-signal.c
@@ -28,10 +28,10 @@
 #include "shash.h"
 #include "socket-util.h"
 #include "util.h"
-
-#define THIS_MODULE VLM_fatal_signal
 #include "vlog.h"
 
+VLOG_DEFINE_THIS_MODULE(fatal_signal)
+
 /* Signals to catch. */
 static const int fatal_signals[] = { SIGTERM, SIGINT, SIGHUP, SIGALRM };
 
@@ -134,6 +134,17 @@ fatal_signal_handler(int sig_nr)
     stored_sig_nr = sig_nr;
 }
 
+/* Check whether a fatal signal has occurred and, if so, call the fatal signal
+ * hooks and exit.
+ *
+ * This function is called automatically by poll_block(), but specialized
+ * programs that may not always call poll_block() on a regular basis should
+ * also call it periodically.  (Therefore, any function with "block" in its
+ * name should call fatal_signal_run() each time it is called, either directly
+ * or through poll_block(), because such functions can only used by specialized
+ * programs that can afford to block outside their main loop around
+ * poll_block().)
+ */
 void
 fatal_signal_run(void)
 {
@@ -204,9 +215,7 @@ fatal_signal_add_file_to_unlink(const char *file)
         fatal_signal_add_hook(unlink_files, cancel_files, NULL, true);
     }
 
-    if (!shash_find(&files, file)) {
-        shash_add(&files, file, NULL);
-    }
+    shash_add_once(&files, file, NULL);
 }
 
 /* Unregisters 'file' from being unlinked when the program terminates via
@@ -240,7 +249,7 @@ fatal_signal_unlink_file_now(const char *file)
 static void
 unlink_files(void *aux OVS_UNUSED)
 {
-    do_unlink_files(); 
+    do_unlink_files();
 }
 
 static void