clean up signal handling using a polling method, from the genius that is mackstann

git-svn-id: https://svn.musicpd.org/mpd/trunk@697 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 38 insertions, 0 deletions

diff --git a/src/signal_check.c b/src/signal_check.c
new file mode 100644
index 000000000..3926ae7b0
--- /dev/null
+++ b/src/signal_check.c
@@ -0,0 +1,38 @@
+#include "signal_check.h"
+
+volatile sig_atomic_t __caught_signals[NSIG];
+
+static void __signal_handler(int sig)
+{
+        __caught_signals[sig] = 1;
+}
+
+static void __set_signal_handler(int sig, void (* handler)(int))
+{
+        struct sigaction act;
+        act.sa_flags = 0;
+        act.sa_handler = handler;
+        sigaction(sig, &act, 0);
+}
+
+void signal_handle(int sig)
+{
+        __set_signal_handler(sig, __signal_handler);
+}
+
+void signal_unhandle(int sig)
+{
+        signal_clear(sig);
+        __set_signal_handler(sig, SIG_DFL);
+}
+
+int signal_is_pending(int sig)
+{
+        return __caught_signals[sig];
+}
+
+void signal_clear(int sig)
+{
+        __caught_signals[sig] = 0;
+}
+