minix/lib/libsys/vm_memctl.c

   1 #include "syslib.h"
   2 #include <unistd.h>
   3 #include <string.h>
   4
   5 int
   6 vm_memctl(endpoint_t ep, int req, void** addr, size_t *len)
   7 {
   8         message m;
   9         int r;
  10
  11         memset(&m, 0, sizeof(m));
  12         m.VM_RS_CTL_ENDPT = ep;
  13         m.VM_RS_CTL_REQ = req;
  14         m.VM_RS_CTL_ADDR = addr ? *addr : 0;
  15         m.VM_RS_CTL_LEN = len ? *len : 0;
  16
  17         r = _taskcall(VM_PROC_NR, VM_RS_MEMCTL, &m);
  18         if(r != OK) {
  19                 return r;
  20         }
  21         if(addr) {
  22                 *addr = m.VM_RS_CTL_ADDR;
  23         }
  24         if(len) {
  25                 *len = m.VM_RS_CTL_LEN;
  26         }
  27
  28         return OK;
  29 }