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-rw-r--r--libc/unistd/ualarm.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/libc/unistd/ualarm.c b/libc/unistd/ualarm.c
new file mode 100644
index 000000000..207a47298
--- /dev/null
+++ b/libc/unistd/ualarm.c
@@ -0,0 +1,19 @@
+#define _GNU_SOURCE
+#include <time.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+useconds_t ualarm(useconds_t value, useconds_t interval)
+{
+ struct itimerval otimer;
+ const struct itimerval itimer = {
+ { 0, interval },
+ { 0, value}
+ };
+
+ if (setitimer(ITIMER_REAL, &itimer, &otimer) < 0) {
+ return -1;
+ }
+ return((otimer.it_value.tv_sec * 1000000) + otimer.it_value.tv_usec);
+}