X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/8f6b4ddf764c3a54e42d00a7502c82c5c3e71b1c..d11ed10c5314c44dc01c06954d1d73d4894cbff8:/LUFA/Common/FunctionAttributes.h diff --git a/LUFA/Common/FunctionAttributes.h b/LUFA/Common/FunctionAttributes.h index 9efa440e5..4ed876d02 100644 --- a/LUFA/Common/FunctionAttributes.h +++ b/LUFA/Common/FunctionAttributes.h @@ -1,21 +1,21 @@ /* LUFA Library - Copyright (C) Dean Camera, 2009. + Copyright (C) Dean Camera, 2010. dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.com */ /* - Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, provided that the above copyright notice appear in all - copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author disclaim all warranties with regard to this @@ -34,6 +34,9 @@ * and code generation features of the compiler. Attributes may be placed in the function prototype in any * order, and multiple attributes can be specified for a single function via a space separated list. * + * On incompatible versions of GCC or on other compilers, these macros evaluate to nothing unless they are + * critical to the code's function and thus must throw a compiler error when used. + * * \note Do not include this file directly, rather include the Common.h header file instead to gain this file's * functionality. */ @@ -56,10 +59,57 @@ /* Public Interface - May be used in end-application: */ /* Macros: */ - /** Indicates to the compiler that the function can not ever return, so that any stack restoring or - * return code may be omitted by the compiler in the resulting binary. - */ - #define ATTR_NO_RETURN __attribute__ ((noreturn)) + #if (__GNUC__ >= 3) || defined(__DOXYGEN__) + /** Indicates to the compiler that the function can not ever return, so that any stack restoring or + * return code may be omitted by the compiler in the resulting binary. + */ + #define ATTR_NO_RETURN __attribute__ ((noreturn)) + + /** Indicates that the function returns a value which should not be ignored by the user code. When + * applied, any ignored return value from calling the function will produce a compiler warning. + */ + #define ATTR_WARN_UNUSED_RESULT __attribute__ ((warn_unused_result)) + + /** Indicates that the specified parameters of the function are pointers which should never be NULL. + * When applied as a 1-based comma separated list the compiler will emit a warning if the specified + * parameters are known at compiler time to be NULL at the point of calling the function. + */ + #define ATTR_NON_NULL_PTR_ARG(...) __attribute__ ((nonnull (__VA_ARGS__))) + + /** Removes any preamble or postamble from the function. When used, the function will not have any + * register or stack saving code. This should be used with caution, and when used the programmer + * is responsible for maintaining stack and register integrity. + */ + #define ATTR_NAKED __attribute__ ((naked)) + + /** Prevents the compiler from considering a specified function for inlining. When applied, the given + * function will not be inlined under any circumstances. + */ + #define ATTR_NO_INLINE __attribute__ ((noinline)) + + /** Forces the compiler to inline the specified function. When applied, the given function will be + * inlined under all circumstances. + */ + #define ATTR_ALWAYS_INLINE __attribute__ ((always_inline)) + + /** Indicates that the specified function is pure, in that it has no side-effects other than global + * or parameter variable access. + */ + #define ATTR_PURE __attribute__ ((pure)) + + /** Indicates that the specified function is constant, in that it has no side effects other than + * parameter access. + */ + #define ATTR_CONST __attribute__ ((const)) + + /** Marks a given function as deprecated, which produces a warning if the function is called. */ + #define ATTR_DEPRECATED __attribute__ ((deprecated)) + + /** Marks a function as a weak reference, which can be overridden by other functions with an + * identical name (in which case the weak reference is discarded at link time). + */ + #define ATTR_WEAK __attribute__ ((weak)) + #endif /** Places the function in one of the initialization sections, which execute before the main function * of the application. The init function number can be specified as "x", as an integer. Refer to the @@ -67,54 +117,8 @@ */ #define ATTR_INIT_SECTION(x) __attribute__ ((naked, section (".init" #x ))) - /** Indicates that the function returns a value which should not be ignored by the user code. When - * applied, any ignored return value from calling the function will produce a compiler warning. - */ - #define ATTR_WARN_UNUSED_RESULT __attribute__ ((warn_unused_result)) - - /** Indicates that the specified parameters of the function are pointers which should never be NULL. - * When applied as a 1-based comma separated list the compiler will emit a warning if the specified - * parameters are known at compiler time to be NULL at the point of calling the function. - */ - #define ATTR_NON_NULL_PTR_ARG(...) __attribute__ ((nonnull (__VA_ARGS__))) - - /** Removes any preamble or postamble from the function. When used, the function will not have any - * register or stack saving code. This should be used with caution, and when used the programmer - * is responsible for maintaining stack and register integrity. - */ - #define ATTR_NAKED __attribute__ ((naked)) - - /** Prevents the compiler from considering a specified function for inlining. When applied, the given - * function will not be inlined under any circumstances. - */ - #define ATTR_NOINLINE __attribute__ ((noinline)) - - /** Forces the compiler to inline the specified function. When applied, the given function will be - * inlined under all circumstances. - */ - #define ATTR_ALWAYS_INLINE __attribute__ ((always_inline)) - - /** Indicates that the specified function is pure, in that it has no side-effects other than global - * or parameter variable access. - */ - #define ATTR_PURE __attribute__ ((pure)) - - /** Indicates that the specified function is constant, in that it has no side effects other than - * parameter access. - */ - #define ATTR_CONST __attribute__ ((const)) - - /** Marks a given function as deprecated, which produces a warning if the function is called. */ - #define ATTR_DEPRECATED __attribute__ ((deprecated)) - - /** Marks a function as a weak reference, which can be overridden by other functions with an - * identical name (in which case the weak reference is discarded at link time). - */ - #define ATTR_WEAK __attribute__ ((weak)) - /** Marks a function as an alias for another function of name "x". */ #define ATTR_ALIAS(x) __attribute__ ((alias( #x ))) - #endif /** @} */