msvc-inval.c 3.82 KB
Newer Older
Bruno Haible's avatar
Bruno Haible committed
1
/* Invalid parameter handler for MSVC runtime libraries.
Paul Eggert's avatar
Paul Eggert committed
2
   Copyright (C) 2011-2016 Free Software Foundation, Inc.
Bruno Haible's avatar
Bruno Haible committed
3 4 5 6 7 8 9 10 11 12 13 14

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along
15
   with this program; if not, see <http://www.gnu.org/licenses/>.  */
Bruno Haible's avatar
Bruno Haible committed
16 17 18 19 20 21

#include <config.h>

/* Specification.  */
#include "msvc-inval.h"

22 23 24 25 26 27 28 29 30
#if HAVE_MSVC_INVALID_PARAMETER_HANDLER \
    && !(MSVC_INVALID_PARAMETER_HANDLING == SANE_LIBRARY_HANDLING)

/* Get _invalid_parameter_handler type and _set_invalid_parameter_handler
   declaration.  */
# include <stdlib.h>

# if MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING

31
static void __cdecl
32 33 34 35 36 37 38 39 40
gl_msvc_invalid_parameter_handler (const wchar_t *expression,
                                   const wchar_t *function,
                                   const wchar_t *file,
                                   unsigned int line,
                                   uintptr_t dummy)
{
}

# else
Bruno Haible's avatar
Bruno Haible committed
41

42
/* Get declarations of the native Windows API functions.  */
43 44
#  define WIN32_LEAN_AND_MEAN
#  include <windows.h>
45

46
#  if defined _MSC_VER
Bruno Haible's avatar
Bruno Haible committed
47

48
static void __cdecl
Bruno Haible's avatar
Bruno Haible committed
49 50 51 52 53 54 55 56 57
gl_msvc_invalid_parameter_handler (const wchar_t *expression,
                                   const wchar_t *function,
                                   const wchar_t *file,
                                   unsigned int line,
                                   uintptr_t dummy)
{
  RaiseException (STATUS_GNULIB_INVALID_PARAMETER, 0, 0, NULL);
}

58
#  else
Bruno Haible's avatar
Bruno Haible committed
59

60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95
/* An index to thread-local storage.  */
static DWORD tls_index;
static int tls_initialized /* = 0 */;

/* Used as a fallback only.  */
static struct gl_msvc_inval_per_thread not_per_thread;

struct gl_msvc_inval_per_thread *
gl_msvc_inval_current (void)
{
  if (!tls_initialized)
    {
      tls_index = TlsAlloc ();
      tls_initialized = 1;
    }
  if (tls_index == TLS_OUT_OF_INDEXES)
    /* TlsAlloc had failed.  */
    return &not_per_thread;
  else
    {
      struct gl_msvc_inval_per_thread *pointer =
        (struct gl_msvc_inval_per_thread *) TlsGetValue (tls_index);
      if (pointer == NULL)
        {
          /* First call.  Allocate a new 'struct gl_msvc_inval_per_thread'.  */
          pointer =
            (struct gl_msvc_inval_per_thread *)
            malloc (sizeof (struct gl_msvc_inval_per_thread));
          if (pointer == NULL)
            /* Could not allocate memory.  Use the global storage.  */
            pointer = &not_per_thread;
          TlsSetValue (tls_index, pointer);
        }
      return pointer;
    }
}
Bruno Haible's avatar
Bruno Haible committed
96

97
static void __cdecl
Bruno Haible's avatar
Bruno Haible committed
98 99 100 101 102 103
gl_msvc_invalid_parameter_handler (const wchar_t *expression,
                                   const wchar_t *function,
                                   const wchar_t *file,
                                   unsigned int line,
                                   uintptr_t dummy)
{
104 105 106
  struct gl_msvc_inval_per_thread *current = gl_msvc_inval_current ();
  if (current->restart_valid)
    longjmp (current->restart, 1);
107 108 109 110
  else
    /* An invalid parameter notification from outside the gnulib code.
       Give the caller a chance to intervene.  */
    RaiseException (STATUS_GNULIB_INVALID_PARAMETER, 0, 0, NULL);
Bruno Haible's avatar
Bruno Haible committed
111 112
}

113 114
#  endif

Bruno Haible's avatar
Bruno Haible committed
115 116
# endif

117 118 119 120 121 122 123 124 125 126 127 128
static int gl_msvc_inval_initialized /* = 0 */;

void
gl_msvc_inval_ensure_handler (void)
{
  if (gl_msvc_inval_initialized == 0)
    {
      _set_invalid_parameter_handler (gl_msvc_invalid_parameter_handler);
      gl_msvc_inval_initialized = 1;
    }
}

Bruno Haible's avatar
Bruno Haible committed
129
#endif