/* Invalid parameter handler for MSVC runtime libraries.

   Copyright (C) 2011-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU Lesser General Public License as published by

   the Free Software Foundation; either version 2.1, 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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License along

   with this program; if not, see <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */

#include "msvc-inval.h"

#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

static void __cdecl

gl_msvc_invalid_parameter_handler (const wchar_t *expression,

                                   const wchar_t *function,

                                   const wchar_t *file,

                                   unsigned int line,

                                   uintptr_t dummy)

{

}

# else

/* Get declarations of the native Windows API functions.  */

#  define WIN32_LEAN_AND_MEAN

#  include <windows.h>

#  if defined _MSC_VER

static void __cdecl

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);

}

#  else

/* 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;

    }

}

static void __cdecl

gl_msvc_invalid_parameter_handler (const wchar_t *expression,

                                   const wchar_t *function,

                                   const wchar_t *file,

                                   unsigned int line,

                                   uintptr_t dummy)

{

  struct gl_msvc_inval_per_thread *current = gl_msvc_inval_current ();

  if (current->restart_valid)

    longjmp (current->restart, 1);

  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);

}

#  endif

# endif

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;

    }

}

#endif