minix/lib/libc/sys-minix/setitimer.c

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#include <sys/cdefs.h>
#include "namespace.h"
#include <lib.h>
#include <string.h>
#include <sys/time.h>
/*
* This is the implementation of the function to
* invoke the interval timer setting system call.
*/
int setitimer(int which, const struct itimerval *__restrict value,
struct itimerval *__restrict ovalue)
{
message m;
/* A null pointer for 'value' would make setitimer behave like getitimer,
* which is not according to the specification, so disallow null pointers.
*/
if (value == NULL) {
errno = EINVAL;
return -1;
}
memset(&m, 0, sizeof(m));
m.m_lc_pm_itimer.which = which;
m.m_lc_pm_itimer.value = (vir_bytes)value;
m.m_lc_pm_itimer.ovalue = (vir_bytes)ovalue;
return _syscall(PM_PROC_NR, PM_ITIMER, &m);
}
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#if defined(__minix) && defined(__weak_alias)
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__weak_alias(setitimer, __setitimer50)
#endif