#include <time.h>
+#include <errno.h>
+#include <stdint.h>
#include "syscall.h"
+#include "libc.h"
+#include "atomic.h"
-int clock_gettime(clockid_t clk, struct timespec *ts)
+static int sc_clock_gettime(clockid_t clk, struct timespec *ts)
{
- return syscall2(__NR_clock_gettime, clk, (long)ts);
+ int r = __syscall(SYS_clock_gettime, clk, ts);
+ if (!r) return r;
+ if (r == -ENOSYS) {
+ if (clk == CLOCK_REALTIME) {
+ __syscall(SYS_gettimeofday, ts, 0);
+ ts->tv_nsec = (int)ts->tv_nsec * 1000;
+ return 0;
+ }
+ r = -EINVAL;
+ }
+ errno = -r;
+ return -1;
}
+
+void *__vdsosym(const char *, const char *);
+
+int __clock_gettime(clockid_t clk, struct timespec *ts)
+{
+#ifdef VDSO_CGT_SYM
+ static int (*cgt)(clockid_t, struct timespec *);
+ if (!cgt) {
+ void *f = __vdsosym(VDSO_CGT_VER, VDSO_CGT_SYM);
+ if (!f) f = (void *)sc_clock_gettime;
+ a_cas_p(&cgt, 0, f);
+ }
+ return cgt(clk, ts);
+#else
+ return sc_clock_gettime(clk, ts);
+#endif
+}
+
+weak_alias(__clock_gettime, clock_gettime);