зеркало из https://github.com/mozilla/gecko-dev.git
367 строки
11 KiB
C
367 строки
11 KiB
C
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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(XPCOM_GLUE) && !defined(NS_NO_XPCOM) && !defined(MOZ_NO_MOZALLOC)
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# include "mozilla/mozalloc.h"
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# include "mozilla/mozalloc_macro_wrappers.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/NullPtr.h"
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/* Core XPCOM declarations. */
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/*----------------------------------------------------------------------*/
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/* Import/export defines */
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/**
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* Using the visibility("hidden") attribute allows the compiler to use
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* PC-relative addressing to call this function. If a function does not
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* access any global data, and does not call any methods which are not either
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* file-local or hidden, then on ELF systems we avoid loading the address of
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* the PLT into a register at the start of the function, which reduces code
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* size and frees up a register for general use.
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*
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* As a general rule, this should be used for any non-exported symbol
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* (including virtual method implementations). NS_IMETHOD uses this by
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* default; if you need to have your NS_IMETHOD functions exported, you can
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* wrap your class as follows:
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*
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* #undef IMETHOD_VISIBILITY
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* #define IMETHOD_VISIBILITY NS_VISIBILITY_DEFAULT
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*
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* class Foo {
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* ...
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* };
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*
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* #undef IMETHOD_VISIBILITY
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* #define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
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*
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* Don't forget to change the visibility back to hidden before the end
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* of a header!
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*
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* Other examples:
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*
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* NS_HIDDEN_(int) someMethod();
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* SomeCtor() NS_HIDDEN;
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*/
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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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#undef IMETHOD_VISIBILITY
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#define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
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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__) && !defined(XP_OS2)
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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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#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 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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/*
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These are needed to mark static members in exported classes, due to
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gcc bug XXX insert bug# here.
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*/
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#define NS_EXPORT_STATIC_MEMBER_(type) type
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#define NS_IMPORT_STATIC_MEMBER_(type) type
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#elif defined(XP_OS2)
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#define NS_IMPORT __declspec(dllimport)
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#define NS_IMPORT_(type) type __declspec(dllimport)
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#define NS_EXPORT __declspec(dllexport)
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#define NS_EXPORT_(type) type __declspec(dllexport)
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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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#define NS_EXPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type)
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#define NS_IMPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type)
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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 IMETHOD_VISIBILITY 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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#define NS_EXPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type)
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#define NS_IMPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type)
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#endif
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/**
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* Macro for creating typedefs for pointer-to-member types which are
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* declared with stdcall. It is important to use this for any type which is
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* declared as stdcall (i.e. NS_IMETHOD). For example, instead of writing:
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*
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* typedef nsresult (nsIFoo::*someType)(nsISupports* arg);
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*
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* you should write:
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*
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* typedef
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* NS_STDCALL_FUNCPROTO(nsresult, someType, nsIFoo, typeFunc, (nsISupports*));
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*
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* where nsIFoo::typeFunc is any method declared as
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* NS_IMETHOD typeFunc(nsISupports*);
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*
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* XXX this can be simplified to always use the non-typeof implementation
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* when http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11893 is fixed.
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*/
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#ifdef __GNUC__
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#define NS_STDCALL_FUNCPROTO(ret, name, class, func, args) \
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typeof(&class::func) name
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#else
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#define NS_STDCALL_FUNCPROTO(ret, name, class, func, args) \
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ret (NS_STDCALL class::*name) args
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#endif
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/**
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* Deprecated declarations.
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*/
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#ifdef __GNUC__
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# define MOZ_DEPRECATED __attribute__((deprecated))
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#elif defined(_MSC_VER)
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# define MOZ_DEPRECATED __declspec(deprecated)
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#else
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# define MOZ_DEPRECATED
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#endif
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/**
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* Generic API modifiers which return the standard XPCOM nsresult type
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*/
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#define NS_IMETHOD NS_IMETHOD_(nsresult)
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#define NS_IMETHODIMP NS_IMETHODIMP_(nsresult)
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#define NS_METHOD NS_METHOD_(nsresult)
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#define NS_CALLBACK(_name) NS_CALLBACK_(nsresult, _name)
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/**
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* Import/Export macros for XPCOM APIs
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*/
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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 EXPORT_XPCOM_API(type) NS_EXTERN_C NS_EXPORT type NS_FROZENCALL
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#define IMPORT_XPCOM_API(type) NS_EXTERN_C NS_IMPORT type NS_FROZENCALL
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#define GLUE_XPCOM_API(type) NS_EXTERN_C NS_HIDDEN_(type) NS_FROZENCALL
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#ifdef IMPL_LIBXUL
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#define XPCOM_API(type) EXPORT_XPCOM_API(type)
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#elif defined(XPCOM_GLUE)
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#define XPCOM_API(type) GLUE_XPCOM_API(type)
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#else
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#define XPCOM_API(type) IMPORT_XPCOM_API(type)
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#endif
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#ifdef MOZILLA_INTERNAL_API
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# define NS_COM_GLUE
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/*
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The frozen string API has different definitions of nsAC?String
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classes than the internal API. On systems that explicitly declare
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dllexport symbols this is not a problem, but on ELF systems
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internal symbols can accidentally "shine through"; we rename the
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internal classes to avoid symbol conflicts.
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*/
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# define nsAString nsAString_internal
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# define nsACString nsACString_internal
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#else
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# ifdef HAVE_VISIBILITY_ATTRIBUTE
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# define NS_COM_GLUE NS_VISIBILITY_HIDDEN
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# else
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# define NS_COM_GLUE
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# endif
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#endif
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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.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_TRACE_MALLOC) || defined(NS_BUILD_REFCNT_LOGGING) || defined(MOZ_VALGRIND)
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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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/**
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* Reference count values
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*
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* This is the return type for AddRef() and Release() in nsISupports.
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* IUnknown of COM returns an unsigned long from equivalent functions.
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* The following ifdef exists to maintain binary compatibility with
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* IUnknown.
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*/
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#ifdef XP_WIN
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typedef unsigned long nsrefcnt;
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#else
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typedef uint32_t nsrefcnt;
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#endif
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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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#if defined(HAVE_THREAD_TLS_KEYWORD)
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#define NS_TLS __thread
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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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