#define COUNT_PARMS(...) \
COUNT_PARMS2(11 , ## __VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
- #define FN_ARGS ...
+ /**
+ * usage:
+ * \code
+ * #define foo_init(...) PP_CAT(foo_init_, COUNT_PARMS(__VA_ARGS__)) (__VA_ARGS__)
+ * \endcode
+ */
#else
#define COUNT_PARMS2(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _, ...) _
#define COUNT_PARMS(args...) \
COUNT_PARMS2(11 , ## args, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
- #define FN_ARGS args...
+ /**
+ * usage:
+ * \code
+ * #define foo_init(args...) PP_CAT(foo_init_, COUNT_PARMS(args)) (args)
+ * \endcode
+ */
+
#endif
#if defined(__IAR_SYSTEMS_ICC) || defined(__IAR_SYSTEMS_ICC__)
#define RESTRICT __restrict__
#define MUST_CHECK __attribute__((warn_unused_result))
#define PACKED __attribute__((packed))
+ #define ALIGNED(x) __attribute__ ((__aligned__(x)))
#if CPU_ARM | CPU_CM3
#define NAKED __attribute__((naked))
#else
#ifndef PACKED
#define PACKED /* nothing */
#endif
+#ifndef ALIGNED
+#define ALIGNED /* nothing */
+#endif
#ifndef MEMORY_BARRIER
#define MEMORY_BARRIER /* nothing */
#warning No memory barrier defined for select compiler. If you use the kernel check it.
typedef long ssize_t;
#elif CPU_ARM || CPU_CM3
typedef int ssize_t;
- #elif CPU_AVR
- /* 16bit (missing in avr-libc's sys/types.h). */
+ #elif CPU_AVR || CPU_MSP430
+ /* 16bit (missing in avr-/msp430-libc's sys/types.h). */
typedef int ssize_t;
#else
#error Unknown CPU
*
* \note This macro is non-standard, but implements a very common idiom
*/
- #define countof(a) (sizeof(a) / sizeof(*(a)))
+ #if defined(__GNUC__) && !defined(__cplusplus)
+ /*
+ * Perform a compile time type checking: countof() can only
+ * work with static arrays, so throw a compile time error if a
+ * pointer is passed as argument.
+ *
+ * NOTE: the construct __builtin_types_compatible_p() is only
+ * available for C.
+ */
+ #define countof(a) (sizeof(a) / sizeof(*(a)) + \
+ STATIC_ASSERT_EXPR( \
+ !__builtin_types_compatible_p( \
+ typeof(a), typeof(&a[0]))))
+ #else
+ #define countof(a) (sizeof(a) / sizeof(*(a)))
+ #endif
#endif
#ifndef alignof
/**
#define STATIC_ASSERT(condition) \
UNUSED_VAR(extern char, STATIC_ASSERTION_FAILED__[(condition) ? 1 : -1])
+/**
+ * Issue a compilation error if \a __cond is false (this can be used inside an
+ * expression).
+ */
+#define STATIC_ASSERT_EXPR(__cond) \
+ (sizeof(struct { int STATIC_ASSERTION_FAILED__:!!(__cond); }) * 0)
+
#ifndef ASSERT_TYPE_EQUAL
/** Ensure two variables have the same type. */
#define ASSERT_TYPE_EQUAL(var1, var2) \