Added support for clock_getres() and clock_settime() in addition to

the already existing clock_gettime(). In addition they will now use
the corresponding system calls if they exists, which resulted in a
move to libc/sysdeps/linux/common for clock_gettime.c (it was
previously located in libc/misc/time).

1 files changed, 51 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/clock_getres.c b/libc/sysdeps/linux/common/clock_getres.c
new file mode 100644
index 000000000..0ae2bb07d
--- /dev/null
+++ b/libc/sysdeps/linux/common/clock_getres.c
@@ -0,0 +1,51 @@
+/*
+ * clock_getres() for uClibc
+ *
+ * Copyright (C) 2005 by Peter Kjellerstedt <pkj@axis.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#define _GNU_SOURCE
+#include "syscalls.h"
+#include <time.h>
+#include <unistd.h>
+
+#ifdef __NR_clock_getres
+_syscall2(int, clock_getres, clockid_t, clock_id, struct timespec*, res);
+#else
+int clock_getres(clockid_t clock_id, struct timespec* res)
+{
+	long clk_tck;
+	int retval = -1;
+
+	switch (clock_id) {
+		case CLOCK_REALTIME:
+			if ((clk_tck = sysconf(_SC_CLK_TCK)) < 0)
+				clk_tck = 100;
+			res->tv_sec = 0;
+			res->tv_nsec = 1000000000 / clk_tck;
+			retval = 0;
+			break;
+
+		default:
+			errno = EINVAL;
+			break;
+	}
+
+	return retval;
+}
+#endif