Add utility functions for clearing/setting signal mask

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>

1 files changed, 26 insertions, 0 deletions

diff --git a/lib/include/util.h b/lib/include/util.h
new file mode 100644
index 0000000..884eeab
--- /dev/null
+++ b/lib/include/util.h
@@ -0,0 +1,26 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <signal.h>
+
+static inline void cli(sigset_t *old_mask)
+{
+	sigset_t mask;
+
+	sigfillset(&mask);
+	sigprocmask(SIG_SETMASK, &mask, old_mask);
+}
+
+static inline void sti(const sigset_t *old_mask)
+{
+	sigset_t mask;
+
+	if (old_mask == NULL) {
+		sigemptyset(&mask);
+		sigprocmask(SIG_SETMASK, &mask, NULL);
+	} else {
+		sigprocmask(SIG_SETMASK, old_mask, NULL);
+	}
+}
+
+#endif /* UTIL_H */