diff options
Diffstat (limited to 'LUFA/Common/FunctionAttributes.h')
| -rw-r--r-- | LUFA/Common/FunctionAttributes.h | 104 |
1 files changed, 54 insertions, 50 deletions
diff --git a/LUFA/Common/FunctionAttributes.h b/LUFA/Common/FunctionAttributes.h index 9a293b619..f86e3d949 100644 --- a/LUFA/Common/FunctionAttributes.h +++ b/LUFA/Common/FunctionAttributes.h @@ -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
+ /** 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_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))
-
/** Marks a function as an alias for another function of name "x". */
#define ATTR_ALIAS(x) __attribute__ ((alias( #x )))
-
#endif
/** @} */
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