1 /*
   2  * Copyright (c) 2000, 2001, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "nt4internals.hpp"
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <assert.h>
  29 
  30 namespace NT4 {
  31 
  32 static HMODULE ntDLL = NULL;
  33 
  34 HMODULE loadNTDLL() {
  35   if (ntDLL == NULL) {
  36     ntDLL = LoadLibrary("NTDLL.DLL");
  37   }
  38 
  39   assert(ntDLL != NULL);
  40   return ntDLL;
  41 }
  42 
  43 void unloadNTDLL() {
  44   if (ntDLL != NULL) {
  45     FreeLibrary(ntDLL);
  46     ntDLL = NULL;
  47   }
  48 }
  49 
  50 } // namespace NT4
  51 
  52 static HMODULE psapiDLL = NULL;
  53 
  54 HMODULE
  55 loadPSAPIDLL() {
  56   if (psapiDLL == NULL) {
  57     psapiDLL = LoadLibrary("PSAPI.DLL");
  58   }
  59 
  60   if (psapiDLL == NULL) {
  61     fprintf(stderr, "Simple Windows Debug Server requires PSAPI.DLL on Windows NT 4.0.\n");
  62     fprintf(stderr, "Please install this DLL from the SDK and restart the server.\n");
  63     exit(1);
  64   }
  65 
  66   return psapiDLL;
  67 }
  68 
  69 void
  70 unloadPSAPIDLL() {
  71   if (psapiDLL != NULL) {
  72     FreeLibrary(psapiDLL);
  73     psapiDLL = NULL;
  74   }
  75 }