lib/libsys/vm_query_exit.c

   1 #include "syslib.h"
   2 #include <unistd.h>
   3 #include <string.h>
   4
   5 /*
   6  * Return a negative error code if the query itself or the processing of the
   7  * query resulted in an error.
   8  * Return 1 if there are more processes waiting to be queried.
   9  * Return 0 if there are no more processes.
  10  * Note that for the return value of 0 and 1, the 'endpt' is set accordingly.
  11  */
  12 int
  13 vm_query_exit(int *endpt)
  14 {
  15         message m;
  16         int r;
  17
  18         memset(&m, 0, sizeof(m));
  19         r = _taskcall(VM_PROC_NR, VM_QUERY_EXIT, &m);
  20         if (r != OK)
  21                 return r;
  22         if (endpt == NULL)
  23                 return EFAULT;
  24
  25         *endpt = m.m_lsys_vm_query_exit.ret_pt;
  26         return (m.m_lsys_vm_query_exit.is_more ? 1 : 0);
  27 }
  28
  29 int
  30 vm_watch_exit(endpoint_t ep)
  31 {
  32         message m;
  33
  34         memset(&m, 0, sizeof(m));
  35         m.VM_WE_EP = ep;
  36         return _taskcall(VM_PROC_NR, VM_WATCH_EXIT, &m);
  37 }