gcc-stl-wrapper.template.h

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=8 et :
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_${HEADER}_h
#define mozilla_${HEADER}_h

#if defined(__cpp_exceptions) && __cpp_exceptions
#  error "STL code can only be used with -fno-exceptions"
#endif

// Silence "warning: #include_next is a GCC extension"
#pragma GCC system_header

#if defined(DEBUG) && !defined(_GLIBCXX_DEBUG)
// Enable checked iterators and other goodies
//
// FIXME/bug 551254: gcc's debug STL implementation requires -frtti.
// Figure out how to resolve this with -fno-rtti.  Maybe build with
// -frtti in DEBUG builds?
//
//  # define _GLIBCXX_DEBUG 1
#endif

// Don't include mozalloc.h for cstdlib, cmath, type_traits, limits and iosfwd.
// See bug 1245076 (cstdlib), bug 1720641 (cmath), bug 1594027 (type_traits,
// limits) and bug 1694575 (iosfwd).
// Please be careful when adding more exceptions, especially regarding
// the header not directly or indirectly including <new>.
#ifndef moz_dont_include_mozalloc_for_cstdlib
#  define moz_dont_include_mozalloc_for_cstdlib
#endif

#ifndef moz_dont_include_mozalloc_for_cmath
#  define moz_dont_include_mozalloc_for_cmath
#endif

#ifndef moz_dont_include_mozalloc_for_type_traits
#  define moz_dont_include_mozalloc_for_type_traits
#endif

#ifndef moz_dont_include_mozalloc_for_limits
#  define moz_dont_include_mozalloc_for_limits
#endif

#ifndef moz_dont_include_mozalloc_for_iosfwd
#  define moz_dont_include_mozalloc_for_iosfwd
#endif

// Include mozalloc after the STL header and all other headers it includes
// have been preprocessed.
#if !defined(MOZ_INCLUDE_MOZALLOC_H) && \
    !defined(moz_dont_include_mozalloc_for_${HEADER})
#  define MOZ_INCLUDE_MOZALLOC_H
#  define MOZ_INCLUDE_MOZALLOC_H_FROM_${HEADER}
#endif

#pragma GCC visibility push(default)
#include_next <${HEADER}>
#pragma GCC visibility pop

#ifdef MOZ_INCLUDE_MOZALLOC_H_FROM_${HEADER}
// See if we're in code that can use mozalloc.
#  if !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
#    include "mozilla/mozalloc.h"
#  else
#    error "STL code can only be used with infallible ::operator new()"
#  endif
#endif

// gcc calls a __throw_*() function from bits/functexcept.h when it
// wants to "throw an exception".  functexcept exists nominally to
// support -fno-exceptions, but since we'll always use the system
// libstdc++, and it's compiled with exceptions, then in practice
// these __throw_*() functions will always throw exceptions (shades of
// -fshort-wchar).  We don't want that and so define our own inlined
// __throw_*().
#ifndef mozilla_throw_gcc_h
#  include "mozilla/throw_gcc.h"
#endif

#endif  // if mozilla_${HEADER}_h