Add build system scaffolding and libc headers

1 files changed, 18 insertions, 0 deletions

diff --git a/lib/libc/time/clock_getcpuclockid.c b/lib/libc/time/clock_getcpuclockid.c
new file mode 100644
index 00000000..5bb53221
--- /dev/null
+++ b/lib/libc/time/clock_getcpuclockid.c
@@ -0,0 +1,18 @@
+#include <time.h>
+#include <syscall.h>
+
+int clock_getcpuclockid(pid_t pid, clockid_t *clock_id)
+{
+	int ret;
+	clockid_t id;
+	struct timespec ts;
+
+	id = (-pid - 1) * 8U + 2;
+	ret = syscall(clock_getres, id, &ts);
+
+	if (ret >= 0) {
+		*clock_id = id;
+	}
+
+	return ret;
+}