config/gcc-stl-wrapper.template.h
author Andrew Osmond <aosmond@mozilla.com>
Tue, 16 Oct 2018 08:45:26 -0400
changeset 447457 ccfa531dea0301244c99db4ff26d5610382487e2
parent 395438 0c9996186048d2ad338c153861fb1c8aa80ce181
permissions -rw-r--r--
Bug 1504699 - Part 7. Update animated image recycling queue to work well with WebRender. r=tnikkel WebRender takes longer than OMTP to release its hold on the current frame. This is because it is in a separate process and holds onto the surface in between rendering frames, rather than getting a reference for each repaint. This patch makes us less aggressive about taking the most recent surface placed in the recycling queue out to avoid blocking on waiting for the surface to be released. Differential Revision: https://phabricator.services.mozilla.com/D10903

/* -*- 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

// For some reason, Apple's GCC refuses to honor -fno-exceptions when
// compiling ObjC.
#if defined(__EXCEPTIONS) && __EXCEPTIONS && !(__OBJC__ && __GNUC__ && XP_IOS)
#  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 for cstdlib. See bug 1245076.
#ifndef moz_dont_include_mozalloc_for_cstdlib
#  define moz_dont_include_mozalloc_for_cstdlib
#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