mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-05 03:54:35 +00:00
2a0942be41
--HG-- extra : rebase_source : 668cd394806203ddfa34bd4f226335ff26c846b5
537 lines
20 KiB
C++
537 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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/. */
|
|
|
|
/* Implementations of various class and method modifier attributes. */
|
|
|
|
#ifndef mozilla_Attributes_h
|
|
#define mozilla_Attributes_h
|
|
|
|
#include "mozilla/Compiler.h"
|
|
|
|
/*
|
|
* MOZ_ALWAYS_INLINE is a macro which expands to tell the compiler that the
|
|
* method decorated with it must be inlined, even if the compiler thinks
|
|
* otherwise. This is only a (much) stronger version of the inline hint:
|
|
* compilers are not guaranteed to respect it (although they're much more likely
|
|
* to do so).
|
|
*
|
|
* The MOZ_ALWAYS_INLINE_EVEN_DEBUG macro is yet stronger. It tells the
|
|
* compiler to inline even in DEBUG builds. It should be used very rarely.
|
|
*/
|
|
#if defined(_MSC_VER)
|
|
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __forceinline
|
|
#elif defined(__GNUC__)
|
|
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG __attribute__((always_inline)) inline
|
|
#else
|
|
# define MOZ_ALWAYS_INLINE_EVEN_DEBUG inline
|
|
#endif
|
|
|
|
#if !defined(DEBUG)
|
|
# define MOZ_ALWAYS_INLINE MOZ_ALWAYS_INLINE_EVEN_DEBUG
|
|
#elif defined(_MSC_VER) && !defined(__cplusplus)
|
|
# define MOZ_ALWAYS_INLINE __inline
|
|
#else
|
|
# define MOZ_ALWAYS_INLINE inline
|
|
#endif
|
|
|
|
#if defined(_MSC_VER)
|
|
/*
|
|
* g++ requires -std=c++0x or -std=gnu++0x to support C++11 functionality
|
|
* without warnings (functionality used by the macros below). These modes are
|
|
* detectable by checking whether __GXX_EXPERIMENTAL_CXX0X__ is defined or, more
|
|
* standardly, by checking whether __cplusplus has a C++11 or greater value.
|
|
* Current versions of g++ do not correctly set __cplusplus, so we check both
|
|
* for forward compatibility.
|
|
*
|
|
* Even though some versions of MSVC support explicit conversion operators, we
|
|
* don't indicate support for them here, due to
|
|
* http://stackoverflow.com/questions/20498142/visual-studio-2013-explicit-keyword-bug
|
|
*/
|
|
# if _MSC_VER >= 1800
|
|
# define MOZ_HAVE_CXX11_DELETE
|
|
# endif
|
|
# if _MSC_VER >= 1700
|
|
# define MOZ_HAVE_CXX11_FINAL final
|
|
# else
|
|
# if defined(__clang__)
|
|
# error Please do not try to use clang-cl with MSVC10 or below emulation!
|
|
# endif
|
|
/* MSVC <= 10 used to spell "final" as "sealed". */
|
|
# define MOZ_HAVE_CXX11_FINAL sealed
|
|
# endif
|
|
# define MOZ_HAVE_CXX11_OVERRIDE
|
|
# define MOZ_HAVE_NEVER_INLINE __declspec(noinline)
|
|
# define MOZ_HAVE_NORETURN __declspec(noreturn)
|
|
#elif defined(__clang__)
|
|
/*
|
|
* Per Clang documentation, "Note that marketing version numbers should not
|
|
* be used to check for language features, as different vendors use different
|
|
* numbering schemes. Instead, use the feature checking macros."
|
|
*/
|
|
# ifndef __has_extension
|
|
# define __has_extension __has_feature /* compatibility, for older versions of clang */
|
|
# endif
|
|
# if __has_extension(cxx_constexpr)
|
|
# define MOZ_HAVE_CXX11_CONSTEXPR
|
|
# endif
|
|
# if __has_extension(cxx_explicit_conversions)
|
|
# define MOZ_HAVE_EXPLICIT_CONVERSION
|
|
# endif
|
|
# if __has_extension(cxx_deleted_functions)
|
|
# define MOZ_HAVE_CXX11_DELETE
|
|
# endif
|
|
# if __has_extension(cxx_override_control)
|
|
# define MOZ_HAVE_CXX11_OVERRIDE
|
|
# define MOZ_HAVE_CXX11_FINAL final
|
|
# endif
|
|
# if __has_attribute(noinline)
|
|
# define MOZ_HAVE_NEVER_INLINE __attribute__((noinline))
|
|
# endif
|
|
# if __has_attribute(noreturn)
|
|
# define MOZ_HAVE_NORETURN __attribute__((noreturn))
|
|
# endif
|
|
#elif defined(__GNUC__)
|
|
# if defined(__GXX_EXPERIMENTAL_CXX0X__) || __cplusplus >= 201103L
|
|
# if MOZ_GCC_VERSION_AT_LEAST(4, 7, 0)
|
|
# define MOZ_HAVE_CXX11_OVERRIDE
|
|
# define MOZ_HAVE_CXX11_FINAL final
|
|
# endif
|
|
# if MOZ_GCC_VERSION_AT_LEAST(4, 6, 0)
|
|
# define MOZ_HAVE_CXX11_CONSTEXPR
|
|
# endif
|
|
# if MOZ_GCC_VERSION_AT_LEAST(4, 5, 0)
|
|
# define MOZ_HAVE_EXPLICIT_CONVERSION
|
|
# endif
|
|
# define MOZ_HAVE_CXX11_DELETE
|
|
# else
|
|
/* __final is a non-C++11 GCC synonym for 'final', per GCC r176655. */
|
|
# if MOZ_GCC_VERSION_AT_LEAST(4, 7, 0)
|
|
# define MOZ_HAVE_CXX11_FINAL __final
|
|
# endif
|
|
# endif
|
|
# define MOZ_HAVE_NEVER_INLINE __attribute__((noinline))
|
|
# define MOZ_HAVE_NORETURN __attribute__((noreturn))
|
|
#endif
|
|
|
|
/*
|
|
* When built with clang analyzer (a.k.a scan-build), define MOZ_HAVE_NORETURN
|
|
* to mark some false positives
|
|
*/
|
|
#ifdef __clang_analyzer__
|
|
# if __has_extension(attribute_analyzer_noreturn)
|
|
# define MOZ_HAVE_ANALYZER_NORETURN __attribute__((analyzer_noreturn))
|
|
# endif
|
|
#endif
|
|
|
|
/*
|
|
* The MOZ_CONSTEXPR specifier declares that a C++11 compiler can evaluate a
|
|
* function at compile time. A constexpr function cannot examine any values
|
|
* except its arguments and can have no side effects except its return value.
|
|
* The MOZ_CONSTEXPR_VAR specifier tells a C++11 compiler that a variable's
|
|
* value may be computed at compile time. It should be prefered to just
|
|
* marking variables as MOZ_CONSTEXPR because if the compiler does not support
|
|
* constexpr it will fall back to making the variable const, and some compilers
|
|
* do not accept variables being marked both const and constexpr.
|
|
*/
|
|
#ifdef MOZ_HAVE_CXX11_CONSTEXPR
|
|
# define MOZ_CONSTEXPR constexpr
|
|
# define MOZ_CONSTEXPR_VAR constexpr
|
|
#else
|
|
# define MOZ_CONSTEXPR /* no support */
|
|
# define MOZ_CONSTEXPR_VAR const
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_EXPLICIT_CONVERSION is a specifier on a type conversion
|
|
* overloaded operator that declares that a C++11 compiler should restrict
|
|
* this operator to allow only explicit type conversions, disallowing
|
|
* implicit conversions.
|
|
*
|
|
* Example:
|
|
*
|
|
* template<typename T>
|
|
* class Ptr
|
|
* {
|
|
* T* mPtr;
|
|
* MOZ_EXPLICIT_CONVERSION operator bool() const
|
|
* {
|
|
* return mPtr != nullptr;
|
|
* }
|
|
* };
|
|
*
|
|
*/
|
|
#ifdef MOZ_HAVE_EXPLICIT_CONVERSION
|
|
# define MOZ_EXPLICIT_CONVERSION explicit
|
|
#else
|
|
# define MOZ_EXPLICIT_CONVERSION /* no support */
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_NEVER_INLINE is a macro which expands to tell the compiler that the
|
|
* method decorated with it must never be inlined, even if the compiler would
|
|
* otherwise choose to inline the method. Compilers aren't absolutely
|
|
* guaranteed to support this, but most do.
|
|
*/
|
|
#if defined(MOZ_HAVE_NEVER_INLINE)
|
|
# define MOZ_NEVER_INLINE MOZ_HAVE_NEVER_INLINE
|
|
#else
|
|
# define MOZ_NEVER_INLINE /* no support */
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_NORETURN, specified at the start of a function declaration, indicates
|
|
* that the given function does not return. (The function definition does not
|
|
* need to be annotated.)
|
|
*
|
|
* MOZ_NORETURN void abort(const char* msg);
|
|
*
|
|
* This modifier permits the compiler to optimize code assuming a call to such a
|
|
* function will never return. It also enables the compiler to avoid spurious
|
|
* warnings about not initializing variables, or about any other seemingly-dodgy
|
|
* operations performed after the function returns.
|
|
*
|
|
* This modifier does not affect the corresponding function's linking behavior.
|
|
*/
|
|
#if defined(MOZ_HAVE_NORETURN)
|
|
# define MOZ_NORETURN MOZ_HAVE_NORETURN
|
|
#else
|
|
# define MOZ_NORETURN /* no support */
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_PRETEND_NORETURN_FOR_STATIC_ANALYSIS, specified at the end of a function
|
|
* declaration, indicates that for the purposes of static analysis, this
|
|
* function does not return. (The function definition does not need to be
|
|
* annotated.)
|
|
*
|
|
* MOZ_ReportCrash(const char* s, const char* file, int ln)
|
|
* MOZ_PRETEND_NORETURN_FOR_STATIC_ANALYSIS
|
|
*
|
|
* Some static analyzers, like scan-build from clang, can use this information
|
|
* to eliminate false positives. From the upstream documentation of scan-build:
|
|
* "This attribute is useful for annotating assertion handlers that actually
|
|
* can return, but for the purpose of using the analyzer we want to pretend
|
|
* that such functions do not return."
|
|
*
|
|
*/
|
|
#if defined(MOZ_HAVE_ANALYZER_NORETURN)
|
|
# define MOZ_PRETEND_NORETURN_FOR_STATIC_ANALYSIS MOZ_HAVE_ANALYZER_NORETURN
|
|
#else
|
|
# define MOZ_PRETEND_NORETURN_FOR_STATIC_ANALYSIS /* no support */
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_ASAN_BLACKLIST is a macro to tell AddressSanitizer (a compile-time
|
|
* instrumentation shipped with Clang and GCC) to not instrument the annotated
|
|
* function. Furthermore, it will prevent the compiler from inlining the
|
|
* function because inlining currently breaks the blacklisting mechanism of
|
|
* AddressSanitizer.
|
|
*/
|
|
#if defined(__has_feature)
|
|
# if __has_feature(address_sanitizer)
|
|
# define MOZ_HAVE_ASAN_BLACKLIST
|
|
# endif
|
|
#elif defined(__GNUC__)
|
|
# if defined(__SANITIZE_ADDRESS__)
|
|
# define MOZ_HAVE_ASAN_BLACKLIST
|
|
# endif
|
|
#endif
|
|
|
|
#if defined(MOZ_HAVE_ASAN_BLACKLIST)
|
|
# define MOZ_ASAN_BLACKLIST MOZ_NEVER_INLINE __attribute__((no_sanitize_address))
|
|
#else
|
|
# define MOZ_ASAN_BLACKLIST /* nothing */
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_TSAN_BLACKLIST is a macro to tell ThreadSanitizer (a compile-time
|
|
* instrumentation shipped with Clang) to not instrument the annotated function.
|
|
* Furthermore, it will prevent the compiler from inlining the function because
|
|
* inlining currently breaks the blacklisting mechanism of ThreadSanitizer.
|
|
*/
|
|
#if defined(__has_feature)
|
|
# if __has_feature(thread_sanitizer)
|
|
# define MOZ_TSAN_BLACKLIST MOZ_NEVER_INLINE __attribute__((no_sanitize_thread))
|
|
# else
|
|
# define MOZ_TSAN_BLACKLIST /* nothing */
|
|
# endif
|
|
#else
|
|
# define MOZ_TSAN_BLACKLIST /* nothing */
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
|
|
/*
|
|
* MOZ_DELETE, specified immediately prior to the ';' terminating an undefined-
|
|
* method declaration, attempts to delete that method from the corresponding
|
|
* class. An attempt to use the method will always produce an error *at compile
|
|
* time* (instead of sometimes as late as link time) when this macro can be
|
|
* implemented. For example, you can use MOZ_DELETE to produce classes with no
|
|
* implicit copy constructor or assignment operator:
|
|
*
|
|
* struct NonCopyable
|
|
* {
|
|
* private:
|
|
* NonCopyable(const NonCopyable& aOther) MOZ_DELETE;
|
|
* void operator=(const NonCopyable& aOther) MOZ_DELETE;
|
|
* };
|
|
*
|
|
* If MOZ_DELETE can't be implemented for the current compiler, use of the
|
|
* annotated method will still cause an error, but the error might occur at link
|
|
* time in some cases rather than at compile time.
|
|
*
|
|
* MOZ_DELETE relies on C++11 functionality not universally implemented. As a
|
|
* backstop, method declarations using MOZ_DELETE should be private.
|
|
*/
|
|
#if defined(MOZ_HAVE_CXX11_DELETE)
|
|
# define MOZ_DELETE = delete
|
|
#else
|
|
# define MOZ_DELETE /* no support */
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_OVERRIDE explicitly indicates that a virtual member function in a class
|
|
* overrides a member function of a base class, rather than potentially being a
|
|
* new member function. MOZ_OVERRIDE should be placed immediately before the
|
|
* ';' terminating the member function's declaration, or before '= 0;' if the
|
|
* member function is pure. If the member function is defined in the class
|
|
* definition, it should appear before the opening brace of the function body.
|
|
*
|
|
* class Base
|
|
* {
|
|
* public:
|
|
* virtual void f() = 0;
|
|
* };
|
|
* class Derived1 : public Base
|
|
* {
|
|
* public:
|
|
* virtual void f() MOZ_OVERRIDE;
|
|
* };
|
|
* class Derived2 : public Base
|
|
* {
|
|
* public:
|
|
* virtual void f() MOZ_OVERRIDE = 0;
|
|
* };
|
|
* class Derived3 : public Base
|
|
* {
|
|
* public:
|
|
* virtual void f() MOZ_OVERRIDE { }
|
|
* };
|
|
*
|
|
* In compilers supporting C++11 override controls, MOZ_OVERRIDE *requires* that
|
|
* the function marked with it override a member function of a base class: it
|
|
* is a compile error if it does not. Otherwise MOZ_OVERRIDE does not affect
|
|
* semantics and merely documents the override relationship to the reader (but
|
|
* of course must still be used correctly to not break C++11 compilers).
|
|
*/
|
|
#if defined(MOZ_HAVE_CXX11_OVERRIDE)
|
|
# define MOZ_OVERRIDE override
|
|
#else
|
|
# define MOZ_OVERRIDE /* no support */
|
|
#endif
|
|
|
|
/*
|
|
* MOZ_FINAL indicates that some functionality cannot be overridden through
|
|
* inheritance. It can be used to annotate either classes/structs or virtual
|
|
* member functions.
|
|
*
|
|
* To annotate a class/struct with MOZ_FINAL, place MOZ_FINAL immediately after
|
|
* the name of the class, before the list of classes from which it derives (if
|
|
* any) and before its opening brace. MOZ_FINAL must not be used to annotate
|
|
* unnamed classes or structs. (With some compilers, and with C++11 proper, the
|
|
* underlying expansion is ambiguous with specifying a class name.)
|
|
*
|
|
* class Base MOZ_FINAL
|
|
* {
|
|
* public:
|
|
* Base();
|
|
* ~Base();
|
|
* virtual void f() { }
|
|
* };
|
|
* // This will be an error in some compilers:
|
|
* class Derived : public Base
|
|
* {
|
|
* public:
|
|
* ~Derived() { }
|
|
* };
|
|
*
|
|
* One particularly common reason to specify MOZ_FINAL upon a class is to tell
|
|
* the compiler that it's not dangerous for it to have a non-virtual destructor
|
|
* yet have one or more virtual functions, silencing the warning it might emit
|
|
* in this case. Suppose Base above weren't annotated with MOZ_FINAL. Because
|
|
* ~Base() is non-virtual, an attempt to delete a Derived* through a Base*
|
|
* wouldn't call ~Derived(), so any cleanup ~Derived() might do wouldn't happen.
|
|
* (Formally C++ says behavior is undefined, but compilers will likely just call
|
|
* ~Base() and not ~Derived().) Specifying MOZ_FINAL tells the compiler that
|
|
* it's safe for the destructor to be non-virtual.
|
|
*
|
|
* In compilers implementing final controls, it is an error to inherit from a
|
|
* class annotated with MOZ_FINAL. In other compilers it serves only as
|
|
* documentation.
|
|
*
|
|
* To annotate a virtual member function with MOZ_FINAL, place MOZ_FINAL
|
|
* immediately before the ';' terminating the member function's declaration, or
|
|
* before '= 0;' if the member function is pure. If the member function is
|
|
* defined in the class definition, it should appear before the opening brace of
|
|
* the function body. (This placement is identical to that for MOZ_OVERRIDE.
|
|
* If both are used, they should appear in the order 'MOZ_FINAL MOZ_OVERRIDE'
|
|
* for consistency.)
|
|
*
|
|
* class Base
|
|
* {
|
|
* public:
|
|
* virtual void f() MOZ_FINAL;
|
|
* };
|
|
* class Derived
|
|
* {
|
|
* public:
|
|
* // This will be an error in some compilers:
|
|
* virtual void f();
|
|
* };
|
|
*
|
|
* In compilers implementing final controls, it is an error for a derived class
|
|
* to override a method annotated with MOZ_FINAL. In other compilers it serves
|
|
* only as documentation.
|
|
*/
|
|
#if defined(MOZ_HAVE_CXX11_FINAL)
|
|
# define MOZ_FINAL MOZ_HAVE_CXX11_FINAL
|
|
#else
|
|
# define MOZ_FINAL /* no support */
|
|
#endif
|
|
|
|
/**
|
|
* MOZ_WARN_UNUSED_RESULT tells the compiler to emit a warning if a function's
|
|
* return value is not used by the caller.
|
|
*
|
|
* Place this attribute at the very beginning of a function definition. For
|
|
* example, write
|
|
*
|
|
* MOZ_WARN_UNUSED_RESULT int foo();
|
|
*
|
|
* or
|
|
*
|
|
* MOZ_WARN_UNUSED_RESULT int foo() { return 42; }
|
|
*/
|
|
#if defined(__GNUC__) || defined(__clang__)
|
|
# define MOZ_WARN_UNUSED_RESULT __attribute__ ((warn_unused_result))
|
|
#else
|
|
# define MOZ_WARN_UNUSED_RESULT
|
|
#endif
|
|
|
|
/*
|
|
* The following macros are attributes that support the static analysis plugin
|
|
* included with Mozilla, and will be implemented (when such support is enabled)
|
|
* as C++11 attributes. Since such attributes are legal pretty much everywhere
|
|
* and have subtly different semantics depending on their placement, the
|
|
* following is a guide on where to place the attributes.
|
|
*
|
|
* Attributes that apply to a struct or class precede the name of the class:
|
|
* (Note that this is different from the placement of MOZ_FINAL for classes!)
|
|
*
|
|
* class MOZ_CLASS_ATTRIBUTE SomeClass {};
|
|
*
|
|
* Attributes that apply to functions follow the parentheses and const
|
|
* qualifiers but precede MOZ_FINAL, MOZ_OVERRIDE and the function body:
|
|
*
|
|
* void DeclaredFunction() MOZ_FUNCTION_ATTRIBUTE;
|
|
* void SomeFunction() MOZ_FUNCTION_ATTRIBUTE {}
|
|
* void PureFunction() const MOZ_FUNCTION_ATTRIBUTE = 0;
|
|
* void OverriddenFunction() MOZ_FUNCTION_ATTIRBUTE MOZ_OVERRIDE;
|
|
*
|
|
* Attributes that apply to variables or parameters follow the variable's name:
|
|
*
|
|
* int variable MOZ_VARIABLE_ATTRIBUTE;
|
|
*
|
|
* Attributes that apply to types follow the type name:
|
|
*
|
|
* typedef int MOZ_TYPE_ATTRIBUTE MagicInt;
|
|
* int MOZ_TYPE_ATTRIBUTE someVariable;
|
|
* int* MOZ_TYPE_ATTRIBUTE magicPtrInt;
|
|
* int MOZ_TYPE_ATTRIBUTE* ptrToMagicInt;
|
|
*
|
|
* Attributes that apply to statements precede the statement:
|
|
*
|
|
* MOZ_IF_ATTRIBUTE if (x == 0)
|
|
* MOZ_DO_ATTRIBUTE do { } while (0);
|
|
*
|
|
* Attributes that apply to labels precede the label:
|
|
*
|
|
* MOZ_LABEL_ATTRIBUTE target:
|
|
* goto target;
|
|
* MOZ_CASE_ATTRIBUTE case 5:
|
|
* MOZ_DEFAULT_ATTRIBUTE default:
|
|
*
|
|
* The static analyses that are performed by the plugin are as follows:
|
|
*
|
|
* MOZ_MUST_OVERRIDE: Applies to all C++ member functions. All immediate
|
|
* subclasses must provide an exact override of this method; if a subclass
|
|
* does not override this method, the compiler will emit an error. This
|
|
* attribute is not limited to virtual methods, so if it is applied to a
|
|
* nonvirtual method and the subclass does not provide an equivalent
|
|
* definition, the compiler will emit an error.
|
|
* MOZ_STACK_CLASS: Applies to all classes. Any class with this annotation is
|
|
* expected to live on the stack, so it is a compile-time error to use it, or
|
|
* an array of such objects, as a global or static variable, or as the type of
|
|
* a new expression (unless placement new is being used). If a member of
|
|
* another class uses this class, or if another class inherits from this
|
|
* class, then it is considered to be a stack class as well, although this
|
|
* attribute need not be provided in such cases.
|
|
* MOZ_NONHEAP_CLASS: Applies to all classes. Any class with this annotation is
|
|
* expected to live on the stack or in static storage, so it is a compile-time
|
|
* error to use it, or an array of such objects, as the type of a new
|
|
* expression (unless placement new is being used). If a member of another
|
|
* class uses this class, or if another class inherits from this class, then
|
|
* it is considered to be a non-heap class as well, although this attribute
|
|
* need not be provided in such cases.
|
|
* MOZ_HEAP_ALLOCATOR: Applies to any function. This indicates that the return
|
|
* value is allocated on the heap, and will as a result check such allocations
|
|
* during MOZ_STACK_CLASS and MOZ_NONHEAP_CLASS annotation checking.
|
|
* MOZ_IMPLICIT: Applies to constructors. Implicit conversion constructors
|
|
* are disallowed by default unless they are marked as MOZ_IMPLICIT. This
|
|
* attribute must be used for constructors which intend to provide implicit
|
|
* conversions.
|
|
*/
|
|
#ifdef MOZ_CLANG_PLUGIN
|
|
# define MOZ_MUST_OVERRIDE __attribute__((annotate("moz_must_override")))
|
|
# define MOZ_STACK_CLASS __attribute__((annotate("moz_stack_class")))
|
|
# define MOZ_NONHEAP_CLASS __attribute__((annotate("moz_nonheap_class")))
|
|
# define MOZ_IMPLICIT __attribute__((annotate("moz_implicit")))
|
|
/*
|
|
* It turns out that clang doesn't like void func() __attribute__ {} without a
|
|
* warning, so use pragmas to disable the warning. This code won't work on GCC
|
|
* anyways, so the warning is safe to ignore.
|
|
*/
|
|
# define MOZ_HEAP_ALLOCATOR \
|
|
_Pragma("clang diagnostic push") \
|
|
_Pragma("clang diagnostic ignored \"-Wgcc-compat\"") \
|
|
__attribute__((annotate("moz_heap_allocator"))) \
|
|
_Pragma("clang diagnostic pop")
|
|
#else
|
|
# define MOZ_MUST_OVERRIDE /* nothing */
|
|
# define MOZ_STACK_CLASS /* nothing */
|
|
# define MOZ_NONHEAP_CLASS /* nothing */
|
|
# define MOZ_IMPLICIT /* nothing */
|
|
# define MOZ_HEAP_ALLOCATOR /* nothing */
|
|
#endif /* MOZ_CLANG_PLUGIN */
|
|
|
|
/*
|
|
* MOZ_THIS_IN_INITIALIZER_LIST is used to avoid a warning when we know that
|
|
* it's safe to use 'this' in an initializer list.
|
|
*/
|
|
#ifdef _MSC_VER
|
|
# define MOZ_THIS_IN_INITIALIZER_LIST() \
|
|
__pragma(warning(push)) \
|
|
__pragma(warning(disable:4355)) \
|
|
this \
|
|
__pragma(warning(pop))
|
|
#else
|
|
# define MOZ_THIS_IN_INITIALIZER_LIST() this
|
|
#endif
|
|
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* mozilla_Attributes_h */
|