#include <sys/time.h>
+#include <errno.h>
#include "syscall.h"
-int setitimer(int which, const struct itimerval *new, struct itimerval *old)
-{
- int ret;
- long knew[4] = {
- new->it_interval.tv_sec, new->it_interval.tv_usec,
- new->it_value.tv_sec, new->it_value.tv_usec
- }, kold[4];
+#define IS32BIT(x) !((x)+0x80000000ULL>>32)
- if (!(ret = syscall3(__NR_setitimer, which, (long)&knew, old ? (long)&kold : 0)) && old)
- *old = (struct itimerval){ { kold[0], kold[1] }, { kold[2], kold[3] } };
- return ret;
+int setitimer(int which, const struct itimerval *restrict new, struct itimerval *restrict old)
+{
+ if (sizeof(time_t) > sizeof(long)) {
+ time_t is = new->it_interval.tv_sec, vs = new->it_value.tv_sec;
+ long ius = new->it_interval.tv_usec, vus = new->it_value.tv_usec;
+ if (!IS32BIT(is) || !IS32BIT(vs))
+ return __syscall_ret(-ENOTSUP);
+ long old32[4];
+ int r = __syscall(SYS_setitimer, which,
+ ((long[]){is, ius, vs, vus}), old32);
+ if (!r && old) {
+ old->it_interval.tv_sec = old32[0];
+ old->it_interval.tv_usec = old32[1];
+ old->it_value.tv_sec = old32[2];
+ old->it_value.tv_usec = old32[3];
+ }
+ return __syscall_ret(r);
+ }
+ return syscall(SYS_setitimer, which, new, old);
}