w32/subproc/w32err.c

   1 /* Error handling for Windows
   2 Copyright (C) 1996-2012 Free Software Foundation, Inc.
   3 This file is part of GNU Make.
   4
   5 GNU Make is free software; you can redistribute it and/or modify it under the
   6 terms of the GNU General Public License as published by the Free Software
   7 Foundation; either version 3 of the License, or (at your option) any later
   8 version.
   9
  10 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
  11 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  12 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License along with
  15 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 #include <stdlib.h>
  18 #include <windows.h>
  19 #include "make.h"
  20 #include "w32err.h"
  21
  22 /*
  23  * Description: the windows32 version of perror()
  24  *
  25  * Returns:  a pointer to a static error
  26  *
  27  * Notes/Dependencies:  I got this from
  28  *      comp.os.ms-windows.programmer.win32
  29  */
  30 const char *
  31 map_windows32_error_to_string (DWORD ercode) {
  32 /*
  33  * We used to have an MSVC-specific '__declspec (thread)' qualifier
  34  * here, with the following comment:
  35  *
  36  * __declspec (thread) necessary if you will use multiple threads on MSVC
  37  *
  38  * However, Make was never multithreaded on Windows (except when
  39  * Ctrl-C is hit, in which case the main thread is stopped
  40  * immediately, so it doesn't matter in this context).  The functions
  41  * on sub_proc.c that started and stopped additional threads were
  42  * never used, and are now #ifdef'ed away.  Until we need more than
  43  * one thread, we have no problems with the following buffer being
  44  * static.  (If and when we do need it to be in thread-local storage,
  45  * the corresponding GCC qualifier is '__thread'.)
  46  */
  47     static char szMessageBuffer[128];
  48         /* Fill message buffer with a default message in
  49          * case FormatMessage fails
  50          */
  51     wsprintf (szMessageBuffer, "Error %ld\n", ercode);
  52
  53         /*
  54          *  Special code for winsock error handling.
  55          */
  56         if (ercode > WSABASEERR) {
  57 #if 0
  58                 HMODULE hModule = GetModuleHandle("wsock32");
  59                 if (hModule != NULL) {
  60                         FormatMessage(FORMAT_MESSAGE_FROM_HMODULE,
  61                                 hModule,
  62                                 ercode,
  63                                 LANG_NEUTRAL,
  64                                 szMessageBuffer,
  65                                 sizeof(szMessageBuffer),
  66                                 NULL);
  67                         FreeLibrary(hModule);
  68                 }
  69 #else
  70                 fatal(NILF, szMessageBuffer);
  71 #endif
  72         } else {
  73                 /*
  74                  *  Default system message handling
  75                  */
  76         FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
  77                   NULL,
  78                   ercode,
  79                   LANG_NEUTRAL,
  80                   szMessageBuffer,
  81                   sizeof(szMessageBuffer),
  82                   NULL);
  83         }
  84     return szMessageBuffer;
  85 }