source: trunk/minix/kernel/system/do_times.c@ 16

/* The kernel call implemented in this file:
 *   m_type:    SYS_TIMES
 *
 * The parameters for this kernel call are:
 *    m4_l1:    T_ENDPT         (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"

#include <minix/endpoint.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, e_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.
   */
  e_proc_nr = (m_ptr->T_ENDPT == SELF) ? m_ptr->m_source : m_ptr->T_ENDPT;
  if(e_proc_nr != NONE && isokendpt(e_proc_nr, &proc_nr)) {
      rp = proc_addr(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 */