/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* ***** BEGIN LICENSE BLOCK ***** * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is mozilla.org code. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * * ***** END LICENSE BLOCK ***** */ #ifndef nscore_h___ #define nscore_h___ /** * Make sure that we have the proper platform specific * c++ definitions needed by nscore.h */ #ifndef _XPCOM_CONFIG_H_ #include "xpcom-config.h" #endif /** * Incorporate the core NSPR data types which XPCOM uses. */ #include "prtypes.h" /* Core XPCOM declarations. */ /** * Macros defining the target platform... */ #ifdef _WIN32 #define NS_WIN32 1 #elif defined(__unix) #define NS_UNIX 1 #elif defined(XP_OS2) #define NS_OS2 1 #endif /*----------------------------------------------------------------------*/ /* Import/export defines */ /** * Using the visibility("hidden") attribute allows the compiler to use * PC-relative addressing to call this function. If a function does not * access any global data, and does not call any methods which are not either * file-local or hidden, then on ELF systems we avoid loading the address of * the PLT into a register at the start of the function, which reduces code * size and frees up a register for general use. * * As a general rule, this should be used for any non-exported symbol * (including virtual method implementations). NS_IMETHOD uses this by * default; if you need to have your NS_IMETHOD functions exported, you can * wrap your class as follows: * * #undef IMETHOD_VISIBILITY * #define IMETHOD_VISIBILITY NS_VISIBILITY_DEFAULT * * class Foo { * ... * }; * * #undef IMETHOD_VISIBILITY * #define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN * * Don't forget to change the visibility back to hidden before the end * of a header! * * Other examples: * * NS_HIDDEN_(int) someMethod(); * SomeCtor() NS_HIDDEN; */ #ifdef HAVE_VISIBILITY_HIDDEN_ATTRIBUTE #define NS_VISIBILITY_HIDDEN __attribute__ ((visibility ("hidden"))) #else #define NS_VISIBILITY_HIDDEN #endif #if defined(HAVE_VISIBILITY_ATTRIBUTE) #define NS_VISIBILITY_DEFAULT __attribute__ ((visibility ("default"))) #else #define NS_VISIBILITY_DEFAULT #endif #define NS_HIDDEN_(type) NS_VISIBILITY_HIDDEN type #define NS_EXTERNAL_VIS_(type) NS_VISIBILITY_DEFAULT type #define NS_HIDDEN NS_VISIBILITY_HIDDEN #define NS_EXTERNAL_VIS NS_VISIBILITY_DEFAULT #undef IMETHOD_VISIBILITY #define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN /** * Mark a function as using a potentially non-standard function calling * convention. This can be used on functions that are called very * frequently, to reduce the overhead of the function call. It is still worth * using the macro for C++ functions which take no parameters since it allows * passing |this| in a register. * * - Do not use this on any scriptable interface method since xptcall won't be * aware of the different calling convention. * - This must appear on the declaration, not the definition. * - Adding this to a public function _will_ break binary compatibility. * - This may be used on virtual functions but you must ensure it is applied * to all implementations - the compiler will _not_ warn but it will crash. * - This has no effect for inline functions or functions which take a * variable number of arguments. * - __fastcall on windows should not be applied to class * constructors/destructors - use the NS_CONSTRUCTOR_FASTCALL macro for * constructors/destructors. * * Examples: int NS_FASTCALL func1(char *foo); * NS_HIDDEN_(int) NS_FASTCALL func2(char *foo); */ #if defined(__i386__) && defined(__GNUC__) && (__GNUC__ >= 3) && !defined(XP_OS2) #define NS_FASTCALL __attribute__ ((regparm (3), stdcall)) #define NS_CONSTRUCTOR_FASTCALL __attribute__ ((regparm (3), stdcall)) #elif defined(XP_WIN) #define NS_FASTCALL __fastcall #define NS_CONSTRUCTOR_FASTCALL #else #define NS_FASTCALL #define NS_CONSTRUCTOR_FASTCALL #endif /* * NS_DEFCALL undoes the effect of a global regparm/stdcall setting * so that xptcall works correctly. */ #if defined(__i386__) && defined(__GNUC__) && (__GNUC__ >= 3) && !defined(XP_OS2) #define NS_DEFCALL __attribute__ ((regparm (0), cdecl)) #else #define NS_DEFCALL #endif #ifdef NS_WIN32 #define NS_IMPORT __declspec(dllimport) #define NS_IMPORT_(type) __declspec(dllimport) type __stdcall #define NS_EXPORT __declspec(dllexport) #define NS_EXPORT_(type) __declspec(dllexport) type __stdcall #define NS_IMETHOD_(type) virtual type __stdcall #define NS_IMETHODIMP_(type) type __stdcall #define NS_METHOD_(type) type __stdcall #define NS_CALLBACK_(_type, _name) _type (__stdcall * _name) #define NS_STDCALL __stdcall #define NS_FROZENCALL __cdecl /* These are needed to mark static members in exported classes, due to gcc bug XXX insert bug# here. */ #define NS_EXPORT_STATIC_MEMBER_(type) type #define NS_IMPORT_STATIC_MEMBER_(type) type #elif defined(XP_OS2) && defined(__declspec) #define NS_IMPORT __declspec(dllimport) #define NS_IMPORT_(type) type __declspec(dllimport) #define NS_EXPORT __declspec(dllexport) #define NS_EXPORT_(type) type __declspec(dllexport) #define NS_IMETHOD_(type) virtual type #define NS_IMETHODIMP_(type) type #define NS_METHOD_(type) type #define NS_CALLBACK_(_type, _name) _type (* _name) #define NS_STDCALL #define NS_FROZENCALL #define NS_EXPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type) #define NS_IMPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type) #else #define NS_IMPORT NS_EXTERNAL_VIS #define NS_IMPORT_(type) NS_EXTERNAL_VIS_(type) #define NS_EXPORT NS_EXTERNAL_VIS #define NS_EXPORT_(type) NS_EXTERNAL_VIS_(type) #define NS_IMETHOD_(type) virtual IMETHOD_VISIBILITY type NS_DEFCALL #define NS_IMETHODIMP_(type) type #define NS_METHOD_(type) type #define NS_CALLBACK_(_type, _name) _type (* _name) #define NS_STDCALL #define NS_FROZENCALL #define NS_EXPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type) #define NS_IMPORT_STATIC_MEMBER_(type) NS_EXTERNAL_VIS_(type) #endif /** * Macro for creating typedefs for pointer-to-member types which are * declared with stdcall. It is important to use this for any type which is * declared as stdcall (i.e. NS_IMETHOD). For example, instead of writing: * * typedef nsresult (nsIFoo::*someType)(nsISupports* arg); * * you should write: * * typedef * NS_STDCALL_FUNCPROTO(nsresult, someType, nsIFoo, typeFunc, (nsISupports*)); * * where nsIFoo::typeFunc is any method declared as * NS_IMETHOD typeFunc(nsISupports*); * * XXX this can be simplified to always use the non-typeof implementation * when http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11893 is fixed. */ #ifdef __GNUC__ #define NS_STDCALL_FUNCPROTO(ret, name, class, func, args) \ typeof(&class::func) name #else #define NS_STDCALL_FUNCPROTO(ret, name, class, func, args) \ ret (NS_STDCALL class::*name) args #endif /** * Generic API modifiers which return the standard XPCOM nsresult type */ #define NS_IMETHOD NS_IMETHOD_(nsresult) #define NS_IMETHODIMP NS_IMETHODIMP_(nsresult) #define NS_METHOD NS_METHOD_(nsresult) #define NS_CALLBACK(_name) NS_CALLBACK_(nsresult, _name) /** * Import/Export macros for XPCOM APIs */ #ifdef __cplusplus #define NS_EXTERN_C extern "C" #else #define NS_EXTERN_C #endif #define EXPORT_XPCOM_API(type) NS_EXTERN_C NS_EXPORT type NS_FROZENCALL #define IMPORT_XPCOM_API(type) NS_EXTERN_C NS_IMPORT type NS_FROZENCALL #define GLUE_XPCOM_API(type) NS_EXTERN_C NS_HIDDEN_(type) NS_FROZENCALL #ifdef _IMPL_NS_COM #define XPCOM_API(type) EXPORT_XPCOM_API(type) #elif defined(XPCOM_GLUE) #define XPCOM_API(type) GLUE_XPCOM_API(type) #else #define XPCOM_API(type) IMPORT_XPCOM_API(type) #endif #ifdef MOZ_ENABLE_LIBXUL #define NS_COM #elif defined(_IMPL_NS_COM) #define NS_COM NS_EXPORT #elif defined(XPCOM_GLUE) #define NS_COM #else #define NS_COM NS_IMPORT #endif #ifdef MOZILLA_INTERNAL_API # define NS_COM_GLUE NS_COM /* The frozen string API has different definitions of nsAC?String classes than the internal API. On systems that explicitly declare dllexport symbols this is not a problem, but on ELF systems internal symbols can accidentally "shine through"; we rename the internal classes to avoid symbol conflicts. */ # define nsAString nsAString_internal # define nsACString nsACString_internal #else # ifdef HAVE_VISIBILITY_ATTRIBUTE # define NS_COM_GLUE NS_VISIBILITY_HIDDEN # else # define NS_COM_GLUE # endif #endif /** * NS_NO_VTABLE is emitted by xpidl in interface declarations whenever * xpidl can determine that the interface can't contain a constructor. * This results in some space savings and possible runtime savings - * see bug 49416. We undefine it first, as xpidl-generated headers * define it for IDL uses that don't include this file. */ #ifdef NS_NO_VTABLE #undef NS_NO_VTABLE #endif #if defined(_MSC_VER) && _MSC_VER >= 1100 #define NS_NO_VTABLE __declspec(novtable) #else #define NS_NO_VTABLE #endif /** * Generic XPCOM result data type */ typedef PRUint32 nsresult; /** * Reference count values * * This is the return type for AddRef() and Release() in nsISupports. * IUnknown of COM returns an unsigned long from equivalent functions. * The following ifdef exists to maintain binary compatibility with * IUnknown. */ #if defined(XP_WIN) && PR_BYTES_PER_LONG == 4 typedef unsigned long nsrefcnt; #else typedef PRUint32 nsrefcnt; #endif /** * The preferred symbol for null. */ #define nsnull 0 #include "nsError.h" /* ------------------------------------------------------------------------ */ /* Casting macros for hiding C++ features from older compilers */ /* All our compiler support template specialization, but not all support the |template <>| notation. The compiler that don't understand this notation just omit it for specialization. Need to add an autoconf test for this. */ /* under Metrowerks (Mac), we don't have autoconf yet */ #ifdef __MWERKS__ #define HAVE_CPP_PARTIAL_SPECIALIZATION #define HAVE_CPP_MODERN_SPECIALIZE_TEMPLATE_SYNTAX #define HAVE_CPP_ACCESS_CHANGING_USING #define HAVE_CPP_AMBIGUITY_RESOLVING_USING #define HAVE_CPP_EXPLICIT #define HAVE_CPP_TYPENAME #define HAVE_CPP_BOOL #define HAVE_CPP_NAMESPACE_STD #define HAVE_CPP_UNAMBIGUOUS_STD_NOTEQUAL #define HAVE_CPP_2BYTE_WCHAR_T #endif /* under VC++ (Windows), we don't have autoconf yet */ #if defined(_MSC_VER) && (_MSC_VER>=1100) /* VC++ 5.0 and greater implement template specialization, 4.2 is unknown */ #define HAVE_CPP_MODERN_SPECIALIZE_TEMPLATE_SYNTAX #define HAVE_CPP_EXPLICIT #define HAVE_CPP_TYPENAME #define HAVE_CPP_ACCESS_CHANGING_USING #if (_MSC_VER==1100) /* VC++5.0 has an internal compiler error (sometimes) without this */ #undef HAVE_CPP_ACCESS_CHANGING_USING #endif #define HAVE_CPP_NAMESPACE_STD #define HAVE_CPP_UNAMBIGUOUS_STD_NOTEQUAL #define HAVE_CPP_2BYTE_WCHAR_T #endif #ifndef __PRUNICHAR__ #define __PRUNICHAR__ /* For now, don't use wchar_t on Unix because it breaks the Netscape * commercial build. When this is fixed there will be no need for the * |NS_REINTERPRET_CAST| in nsLiteralString.h either. */ #if defined(HAVE_CPP_2BYTE_WCHAR_T) && defined(NS_WIN32) typedef wchar_t PRUnichar; #else typedef PRUint16 PRUnichar; #endif #endif /* If the compiler doesn't support |explicit|, we'll just make it go away, trusting that the builds under compilers that do have it will keep us on the straight and narrow. */ #ifndef HAVE_CPP_EXPLICIT #define explicit #endif #ifndef HAVE_CPP_TYPENAME #define typename #endif #ifdef HAVE_CPP_MODERN_SPECIALIZE_TEMPLATE_SYNTAX #define NS_SPECIALIZE_TEMPLATE template <> #else #define NS_SPECIALIZE_TEMPLATE #endif #define NS_STATIC_CAST(__type, __ptr) static_cast< __type >(__ptr) #define NS_CONST_CAST(__type, __ptr) const_cast< __type >(__ptr) #define NS_REINTERPRET_POINTER_CAST(__type, __ptr) reinterpret_cast< __type >(__ptr) #define NS_REINTERPRET_NONPOINTER_CAST(__type, __obj) reinterpret_cast< __type >(__obj) #define NS_REINTERPRET_CAST(__type, __expr) reinterpret_cast< __type >(__expr) /* * Use these macros to do 64bit safe pointer conversions. */ #define NS_PTR_TO_INT32(x) ((PRInt32) (PRWord) (x)) #define NS_PTR_TO_UINT32(x) ((PRUint32) (PRWord) (x)) #define NS_INT32_TO_PTR(x) ((void *) (PRWord) (x)) /* * Use NS_STRINGIFY to form a string literal from the value of a macro. */ #define NS_STRINGIFY_HELPER(x_) #x_ #define NS_STRINGIFY(x_) NS_STRINGIFY_HELPER(x_) /* * These macros allow you to give a hint to the compiler about branch * probability so that it can better optimize. Use them like this: * * if (NS_LIKELY(v == 1)) { * ... expected code path ... * } * * if (NS_UNLIKELY(v == 0)) { * ... non-expected code path ... * } * * These macros are guaranteed to always return 0 or 1. * The NS_FAILED/NS_SUCCEEDED macros depends on this. * @return 0 or 1 */ #if defined(__GNUC__) && (__GNUC__ > 2) #define NS_LIKELY(x) (__builtin_expect(!!(x), 1)) #define NS_UNLIKELY(x) (__builtin_expect(!!(x), 0)) #else #define NS_LIKELY(x) (!!(x)) #define NS_UNLIKELY(x) (!!(x)) #endif #endif /* nscore_h___ */