1 files changed, 38 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/time/clock_nanosleep.c b/libc-top-half/musl/src/time/clock_nanosleep.c
new file mode 100644
index 0000000..e195499
--- /dev/null
+++ b/libc-top-half/musl/src/time/clock_nanosleep.c
@@ -0,0 +1,38 @@
+#include <time.h>
+#include <errno.h>
+#include "syscall.h"
+
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
+#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
+
+int __clock_nanosleep(clockid_t clk, int flags, const struct timespec *req, struct timespec *rem)
+{
+	if (clk == CLOCK_THREAD_CPUTIME_ID) return EINVAL;
+#ifdef SYS_clock_nanosleep_time64
+	time_t s = req->tv_sec;
+	long ns = req->tv_nsec;
+	int r = -ENOSYS;
+	if (SYS_clock_nanosleep == SYS_clock_nanosleep_time64 || !IS32BIT(s))
+		r = __syscall_cp(SYS_clock_nanosleep_time64, clk, flags,
+			((long long[]){s, ns}), rem);
+	if (SYS_clock_nanosleep == SYS_clock_nanosleep_time64 || r!=-ENOSYS)
+		return -r;
+	long long extra = s - CLAMP(s);
+	long ts32[2] = { CLAMP(s), ns };
+	if (clk == CLOCK_REALTIME && !flags)
+		r = __syscall_cp(SYS_nanosleep, &ts32, &ts32);
+	else
+		r = __syscall_cp(SYS_clock_nanosleep, clk, flags, &ts32, &ts32);
+	if (r==-EINTR && rem && !(flags & TIMER_ABSTIME)) {
+		rem->tv_sec = ts32[0] + extra;
+		rem->tv_nsec = ts32[1];
+	}
+	return -r;
+#else
+	if (clk == CLOCK_REALTIME && !flags)
+		return -__syscall_cp(SYS_nanosleep, req, rem);
+	return -__syscall_cp(SYS_clock_nanosleep, clk, flags, req, rem);
+#endif
+}
+
+weak_alias(__clock_nanosleep, clock_nanosleep);