do_times.c

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    1 /* The kernel call implemented in this file:
    2  *   m_type:    SYS_TIMES
    3  *
    4  * The parameters for this kernel call are:
    5  *    m4_l1:    T_PROC_NR               (get info for this process)     
    6  *    m4_l1:    T_USER_TIME             (return values ...)     
    7  *    m4_l2:    T_SYSTEM_TIME   
    8  *    m4_l5:    T_BOOT_TICKS    
    9  */
   10 
   11 #include "../system.h"
   12 
   13 #if USE_TIMES
   14 
   15 /*===========================================================================*
   16  *                              do_times                                     *
   17  *===========================================================================*/
   18 PUBLIC int do_times(m_ptr)
   19 register message *m_ptr;        /* pointer to request message */
   20 {
   21 /* Handle sys_times().  Retrieve the accounting information. */
   22   register struct proc *rp;
   23   int proc_nr;
   24 
   25   /* Insert the times needed by the SYS_TIMES kernel call in the message. 
   26    * The clock's interrupt handler may run to update the user or system time
   27    * while in this code, but that cannot do any harm.
   28    */
   29   proc_nr = (m_ptr->T_PROC_NR == SELF) ? m_ptr->m_source : m_ptr->T_PROC_NR;
   30   if (isokprocn(proc_nr)) {
   31       rp = proc_addr(m_ptr->T_PROC_NR);
   32       m_ptr->T_USER_TIME   = rp->p_user_time;
   33       m_ptr->T_SYSTEM_TIME = rp->p_sys_time;
   34   }
   35   m_ptr->T_BOOT_TICKS = get_uptime();  
   36   return(OK);
   37 }
   38 
   39 #endif /* USE_TIMES */
   40

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FreeBSD/Linux Kernel Cross Reference sys/kernel/system/do_times.c

FreeBSD/Linux Kernel Cross Reference
sys/kernel/system/do_times.c