lib/msvc-inval.c

   1 /* Invalid parameter handler for MSVC runtime libraries.
   2    Copyright (C) 2011-2012 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License along
  15    with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 #include <config.h>
  19
  20 /* Specification.  */
  21 #include "msvc-inval.h"
  22
  23 #if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
  24     && !(MSVC_INVALID_PARAMETER_HANDLING == SANE_LIBRARY_HANDLING)
  25
  26 /* Get _invalid_parameter_handler type and _set_invalid_parameter_handler
  27    declaration.  */
  28 # include <stdlib.h>
  29
  30 # if MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
  31
  32 static void cdecl
  33 gl_msvc_invalid_parameter_handler (const wchar_t *expression,
  34                                    const wchar_t *function,
  35                                    const wchar_t *file,
  36                                    unsigned int line,
  37                                    uintptr_t dummy)
  38 {
  39 }
  40
  41 # else
  42
  43 /* Get declarations of the native Windows API functions.  */
  44 #  define WIN32_LEAN_AND_MEAN
  45 #  include <windows.h>
  46
  47 #  if defined _MSC_VER
  48
  49 static void cdecl
  50 gl_msvc_invalid_parameter_handler (const wchar_t *expression,
  51                                    const wchar_t *function,
  52                                    const wchar_t *file,
  53                                    unsigned int line,
  54                                    uintptr_t dummy)
  55 {
  56   RaiseException (STATUS_GNULIB_INVALID_PARAMETER, 0, 0, NULL);
  57 }
  58
  59 #  else
  60
  61 /* An index to thread-local storage.  */
  62 static DWORD tls_index;
  63 static int tls_initialized /* = 0 */;
  64
  65 /* Used as a fallback only.  */
  66 static struct gl_msvc_inval_per_thread not_per_thread;
  67
  68 struct gl_msvc_inval_per_thread *
  69 gl_msvc_inval_current (void)
  70 {
  71   if (!tls_initialized)
  72     {
  73       tls_index = TlsAlloc ();
  74       tls_initialized = 1;
  75     }
  76   if (tls_index == TLS_OUT_OF_INDEXES)
  77     /* TlsAlloc had failed.  */
  78     return &not_per_thread;
  79   else
  80     {
  81       struct gl_msvc_inval_per_thread *pointer =
  82         (struct gl_msvc_inval_per_thread *) TlsGetValue (tls_index);
  83       if (pointer == NULL)
  84         {
  85           /* First call.  Allocate a new 'struct gl_msvc_inval_per_thread'.  */
  86           pointer =
  87             (struct gl_msvc_inval_per_thread *)
  88             malloc (sizeof (struct gl_msvc_inval_per_thread));
  89           if (pointer == NULL)
  90             /* Could not allocate memory.  Use the global storage.  */
  91             pointer = &not_per_thread;
  92           TlsSetValue (tls_index, pointer);
  93         }
  94       return pointer;
  95     }
  96 }
  97
  98 static void cdecl
  99 gl_msvc_invalid_parameter_handler (const wchar_t *expression,
 100                                    const wchar_t *function,
 101                                    const wchar_t *file,
 102                                    unsigned int line,
 103                                    uintptr_t dummy)
 104 {
 105   struct gl_msvc_inval_per_thread *current = gl_msvc_inval_current ();
 106   if (current->restart_valid)
 107     longjmp (current->restart, 1);
 108   else
 109     /* An invalid parameter notification from outside the gnulib code.
 110        Give the caller a chance to intervene.  */
 111     RaiseException (STATUS_GNULIB_INVALID_PARAMETER, 0, 0, NULL);
 112 }
 113
 114 #  endif
 115
 116 # endif
 117
 118 static int gl_msvc_inval_initialized /* = 0 */;
 119
 120 void
 121 gl_msvc_inval_ensure_handler (void)
 122 {
 123   if (gl_msvc_inval_initialized == 0)
 124     {
 125       _set_invalid_parameter_handler (gl_msvc_invalid_parameter_handler);
 126       gl_msvc_inval_initialized = 1;
 127     }
 128 }
 129
 130 #endif