w32/subproc/w32err.c

   1 /* Error handling for Windows
   2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
   3 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
   4 This file is part of GNU Make.
   5
   6 GNU Make is free software; you can redistribute it and/or modify it under the
   7 terms of the GNU General Public License as published by the Free Software
   8 Foundation; either version 3 of the License, or (at your option) any later
   9 version.
  10
  11 GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  13 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License along with
  16 this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdlib.h>
  19 #include <windows.h>
  20 #include "make.h"
  21 #include "w32err.h"
  22
  23 /*
  24  * Description: the windows32 version of perror()
  25  *
  26  * Returns:  a pointer to a static error
  27  *
  28  * Notes/Dependencies:  I got this from
  29  *      comp.os.ms-windows.programmer.win32
  30  */
  31 const char *
  32 map_windows32_error_to_string (DWORD ercode) {
  33 /*
  34  * We used to have an MSVC-specific '__declspec (thread)' qualifier
  35  * here, with the following comment:
  36  *
  37  * __declspec (thread) necessary if you will use multiple threads on MSVC
  38  *
  39  * However, Make was never multithreaded on Windows (except when
  40  * Ctrl-C is hit, in which case the main thread is stopped
  41  * immediately, so it doesn't matter in this context).  The functions
  42  * on sub_proc.c that started and stopped additional threads were
  43  * never used, and are now #ifdef'ed away.  Until we need more than
  44  * one thread, we have no problems with the following buffer being
  45  * static.  (If and when we do need it to be in thread-local storage,
  46  * the corresponding GCC qualifier is '__thread'.)
  47  */
  48     static char szMessageBuffer[128];
  49         /* Fill message buffer with a default message in
  50          * case FormatMessage fails
  51          */
  52     wsprintf (szMessageBuffer, "Error %ld\n", ercode);
  53
  54         /*
  55          *  Special code for winsock error handling.
  56          */
  57         if (ercode > WSABASEERR) {
  58 #if 0
  59                 HMODULE hModule = GetModuleHandle("wsock32");
  60                 if (hModule != NULL) {
  61                         FormatMessage(FORMAT_MESSAGE_FROM_HMODULE,
  62                                 hModule,
  63                                 ercode,
  64                                 LANG_NEUTRAL,
  65                                 szMessageBuffer,
  66                                 sizeof(szMessageBuffer),
  67                                 NULL);
  68                         FreeLibrary(hModule);
  69                 }
  70 #else
  71                 fatal(NILF, szMessageBuffer);
  72 #endif
  73         } else {
  74                 /*
  75                  *  Default system message handling
  76                  */
  77         FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
  78                   NULL,
  79                   ercode,
  80                   LANG_NEUTRAL,
  81                   szMessageBuffer,
  82                   sizeof(szMessageBuffer),
  83                   NULL);
  84         }
  85     return szMessageBuffer;
  86 }