зеркало из https://github.com/mozilla/gecko-dev.git
265 строки
8.0 KiB
C++
265 строки
8.0 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nscore_h___
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#define nscore_h___
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/**
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* Make sure that we have the proper platform specific
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* c++ definitions needed by nscore.h
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*/
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#ifndef _XPCOM_CONFIG_H_
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# include "xpcom-config.h"
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#endif
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/* Definitions of functions and operators that allocate memory. */
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#if !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
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# include "mozilla/mozalloc.h"
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#endif
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/**
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* Incorporate the integer data types which XPCOM uses.
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include "mozilla/RefCountType.h"
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/* Core XPCOM declarations. */
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/*----------------------------------------------------------------------*/
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/* Import/export defines */
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#ifdef HAVE_VISIBILITY_HIDDEN_ATTRIBUTE
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# define NS_VISIBILITY_HIDDEN __attribute__((visibility("hidden")))
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#else
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# define NS_VISIBILITY_HIDDEN
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#endif
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#if defined(HAVE_VISIBILITY_ATTRIBUTE)
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# define NS_VISIBILITY_DEFAULT __attribute__((visibility("default")))
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#elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
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# define NS_VISIBILITY_DEFAULT __global
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#else
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# define NS_VISIBILITY_DEFAULT
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#endif
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#define NS_HIDDEN_(type) NS_VISIBILITY_HIDDEN type
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#define NS_EXTERNAL_VIS_(type) NS_VISIBILITY_DEFAULT type
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#define NS_HIDDEN NS_VISIBILITY_HIDDEN
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#define NS_EXTERNAL_VIS NS_VISIBILITY_DEFAULT
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/**
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* Mark a function as using a potentially non-standard function calling
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* convention. This can be used on functions that are called very
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* frequently, to reduce the overhead of the function call. It is still worth
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* using the macro for C++ functions which take no parameters since it allows
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* passing |this| in a register.
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*
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* - Do not use this on any scriptable interface method since xptcall won't be
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* aware of the different calling convention.
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* - This must appear on the declaration, not the definition.
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* - Adding this to a public function _will_ break binary compatibility.
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* - This may be used on virtual functions but you must ensure it is applied
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* to all implementations - the compiler will _not_ warn but it will crash.
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* - This has no effect for functions which take a variable number of
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* arguments.
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* - __fastcall on windows should not be applied to class
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* constructors/destructors - use the NS_CONSTRUCTOR_FASTCALL macro for
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* constructors/destructors.
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*
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* Examples: int NS_FASTCALL func1(char *foo);
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* NS_HIDDEN_(int) NS_FASTCALL func2(char *foo);
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*/
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#if defined(__i386__) && defined(__GNUC__)
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# define NS_FASTCALL __attribute__((regparm(3), stdcall))
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# define NS_CONSTRUCTOR_FASTCALL __attribute__((regparm(3), stdcall))
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#elif defined(XP_WIN) && !defined(_WIN64)
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# define NS_FASTCALL __fastcall
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# define NS_CONSTRUCTOR_FASTCALL
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#else
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# define NS_FASTCALL
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# define NS_CONSTRUCTOR_FASTCALL
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#endif
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/**
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* Various API modifiers.
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*
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* - NS_IMETHOD/NS_IMETHOD_: use for in-class declarations and definitions.
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* - NS_IMETHODIMP/NS_IMETHODIMP_: use for out-of-class definitions.
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* - NS_METHOD_: usually used in conjunction with NS_CALLBACK_. Best avoided.
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* - NS_CALLBACK_: used in some legacy situations. Best avoided.
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*/
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#ifdef XP_WIN
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# define NS_IMPORT __declspec(dllimport)
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# define NS_IMPORT_(type) __declspec(dllimport) type __stdcall
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# define NS_EXPORT __declspec(dllexport)
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# define NS_EXPORT_(type) __declspec(dllexport) type __stdcall
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# define NS_IMETHOD_(type) virtual type __stdcall
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# define NS_IMETHODIMP_(type) type __stdcall
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# define NS_METHOD_(type) type __stdcall
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# define NS_CALLBACK_(_type, _name) _type(__stdcall* _name)
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# ifndef _WIN64
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// Win64 has only one calling convention. __stdcall will be ignored by the
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// compiler.
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# define NS_STDCALL __stdcall
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# define NS_HAVE_STDCALL
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# else
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# define NS_STDCALL
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# endif
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# define NS_FROZENCALL __cdecl
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#else
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# define NS_IMPORT NS_EXTERNAL_VIS
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# define NS_IMPORT_(type) NS_EXTERNAL_VIS_(type)
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# define NS_EXPORT NS_EXTERNAL_VIS
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# define NS_EXPORT_(type) NS_EXTERNAL_VIS_(type)
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# define NS_IMETHOD_(type) virtual type
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# define NS_IMETHODIMP_(type) type
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# define NS_METHOD_(type) type
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# define NS_CALLBACK_(_type, _name) _type(*_name)
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# define NS_STDCALL
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# define NS_FROZENCALL
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#endif
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#define NS_IMETHOD NS_IMETHOD_(nsresult)
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#define NS_IMETHODIMP NS_IMETHODIMP_(nsresult)
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/**
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* Import/Export macros for XPCOM APIs
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*/
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#define EXPORT_XPCOM_API(type) type
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#define IMPORT_XPCOM_API(type) type
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#define GLUE_XPCOM_API(type) type
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#ifdef __cplusplus
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# define NS_EXTERN_C extern "C"
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#else
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# define NS_EXTERN_C
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#endif
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#define XPCOM_API(type) NS_EXTERN_C type
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#if (defined(DEBUG) || defined(FORCE_BUILD_REFCNT_LOGGING))
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/* Make refcnt logging part of the build. This doesn't mean that
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* actual logging will occur (that requires a separate enable; see
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* nsTraceRefcnt and nsISupportsImpl.h for more information). */
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# define NS_BUILD_REFCNT_LOGGING
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#endif
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/* If NO_BUILD_REFCNT_LOGGING is defined then disable refcnt logging
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* in the build. This overrides FORCE_BUILD_REFCNT_LOGGING. */
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#if defined(NO_BUILD_REFCNT_LOGGING)
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# undef NS_BUILD_REFCNT_LOGGING
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#endif
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/* If a program allocates memory for the lifetime of the app, it doesn't make
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* sense to touch memory pages and free that memory at shutdown,
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* unless we are running leak stats.
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*/
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#if defined(NS_BUILD_REFCNT_LOGGING) || defined(MOZ_VALGRIND) || \
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defined(MOZ_ASAN) || defined(MOZ_CODE_COVERAGE)
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# define NS_FREE_PERMANENT_DATA
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#endif
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/**
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* NS_NO_VTABLE is emitted by xpidl in interface declarations whenever
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* xpidl can determine that the interface can't contain a constructor.
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* This results in some space savings and possible runtime savings -
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* see bug 49416. We undefine it first, as xpidl-generated headers
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* define it for IDL uses that don't include this file.
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*/
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#ifdef NS_NO_VTABLE
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# undef NS_NO_VTABLE
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#endif
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#if defined(_MSC_VER)
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# define NS_NO_VTABLE __declspec(novtable)
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#else
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# define NS_NO_VTABLE
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#endif
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/**
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* Generic XPCOM result data type
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*/
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#include "nsError.h"
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typedef MozRefCountType nsrefcnt;
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namespace mozilla {
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// Extensions to the mozilla::Result type for handling of nsresult values.
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//
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// Note that these specializations need to be defined before Result.h is
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// included, or we run into explicit specialization after instantiation errors,
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// especially if Result.h is used in multiple sources in a unified compile.
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namespace detail {
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// When used as an error value, nsresult should never be NS_OK.
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// This specialization allows us to pack Result<Ok, nsresult> into a
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// nsresult-sized value.
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template <typename T>
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struct UnusedZero;
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template <>
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struct UnusedZero<nsresult> {
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static const bool value = true;
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};
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} // namespace detail
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template <typename T>
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class MOZ_MUST_USE_TYPE GenericErrorResult;
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template <>
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class MOZ_MUST_USE_TYPE GenericErrorResult<nsresult>;
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struct Ok;
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template <typename V, typename E>
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class Result;
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// Allow MOZ_TRY to handle `nsresult` values.
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inline Result<Ok, nsresult> ToResult(nsresult aValue);
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} // namespace mozilla
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/*
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* Use these macros to do 64bit safe pointer conversions.
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*/
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#define NS_PTR_TO_INT32(x) ((int32_t)(intptr_t)(x))
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#define NS_PTR_TO_UINT32(x) ((uint32_t)(intptr_t)(x))
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#define NS_INT32_TO_PTR(x) ((void*)(intptr_t)(x))
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/*
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* Use NS_STRINGIFY to form a string literal from the value of a macro.
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*/
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#define NS_STRINGIFY_HELPER(x_) #x_
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#define NS_STRINGIFY(x_) NS_STRINGIFY_HELPER(x_)
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/*
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* If we're being linked as standalone glue, we don't want a dynamic
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* dependency on NSPR libs, so we skip the debug thread-safety
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* checks, and we cannot use the THREADSAFE_ISUPPORTS macros.
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*/
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#if defined(XPCOM_GLUE) && !defined(XPCOM_GLUE_USE_NSPR)
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# define XPCOM_GLUE_AVOID_NSPR
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#endif
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/*
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* SEH exception macros.
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*/
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#ifdef HAVE_SEH_EXCEPTIONS
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# define MOZ_SEH_TRY __try
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# define MOZ_SEH_EXCEPT(expr) __except (expr)
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#else
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# define MOZ_SEH_TRY if (true)
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# define MOZ_SEH_EXCEPT(expr) else
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#endif
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#endif /* nscore_h___ */
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