#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/time.h>

#include "../internal/syscall.h"

#if VLIBC_LEVEL_GE(2)

/*
 * setitimer: arm (or disarm) interval timer which (ITIMER_REAL,
 * ITIMER_VIRTUAL or ITIMER_PROF), via SYS_setitimer. struct itimerval is
 * layout-identical to the kernel's two-timeval structure on x86_64, so both
 * pointers pass straight through: value NULL leaves the timer unchanged,
 * it_value zero disarms it, and the previous setting is stored through
 * ovalue when it is not NULL. An unknown which or an invalid pointer is
 * rejected by the kernel (EINVAL / EFAULT), reported as -1 with errno set.
 */
int
setitimer(int which, const struct itimerval *restrict value, struct itimerval *restrict ovalue)
{
    return syscall_ret(__syscall3(SYS_setitimer, which, (long)value, (long)ovalue));
}

#endif /* VLIBC_LEVEL_GE(2) */