minix/kernel/system/do_times.c
2005-10-14 08:58:59 +00:00

40 lines
1.2 KiB
C

/* The kernel call implemented in this file:
* m_type: SYS_TIMES
*
* The parameters for this kernel call are:
* m4_l1: T_PROC_NR (get info for this process)
* m4_l1: T_USER_TIME (return values ...)
* m4_l2: T_SYSTEM_TIME
* m4_l5: T_BOOT_TICKS
*/
#include "../system.h"
#if USE_TIMES
/*===========================================================================*
* do_times *
*===========================================================================*/
PUBLIC int do_times(m_ptr)
register message *m_ptr; /* pointer to request message */
{
/* Handle sys_times(). Retrieve the accounting information. */
register struct proc *rp;
int proc_nr;
/* Insert the times needed by the SYS_TIMES kernel call in the message.
* The clock's interrupt handler may run to update the user or system time
* while in this code, but that cannot do any harm.
*/
proc_nr = (m_ptr->T_PROC_NR == SELF) ? m_ptr->m_source : m_ptr->T_PROC_NR;
if (isokprocn(proc_nr)) {
rp = proc_addr(m_ptr->T_PROC_NR);
m_ptr->T_USER_TIME = rp->p_user_time;
m_ptr->T_SYSTEM_TIME = rp->p_sys_time;
}
m_ptr->T_BOOT_TICKS = get_uptime();
return(OK);
}
#endif /* USE_TIMES */