Define forbid_cnt.

[bertos.git] / compiler.h

diff --git a/compiler.h b/compiler.h
index a81120f498ca3ec0721bff2a14cb6a4b9c2aa221..40266bd03ffc60321e0937563757d240c2875fbd 100755 (executable)
--- a/compiler.h
+++ b/compiler.h
@@ -6,15 +6,29 @@
  * This file is part of DevLib - See devlib/README for information.
  * -->
  *
- * \version $Id$
+ * \brief Additional support macros for compiler independance
  *
+ * \version $Id$
  * \author Bernardo Innocenti <bernie@develer.com>
- *
- * \brief Additional support macros for compiler independance
  */
 
 /*#*
  *#* $Log$
+ *#* Revision 1.26  2004/10/19 08:55:14  bernie
+ *#* UNUSED_FUNC: New function attribute.
+ *#*
+ *#* Revision 1.25  2004/10/19 07:14:20  bernie
+ *#* Add macros to test for specific compiler features.
+ *#*
+ *#* Revision 1.24  2004/10/03 18:35:13  bernie
+ *#* Poison C++ keywords in C programs for better portability.
+ *#*
+ *#* Revision 1.23  2004/09/20 03:30:27  bernie
+ *#* Remove vsprintf_P() proto, no longer needed with avr-libc 1.0.4.
+ *#*
+ *#* Revision 1.22  2004/09/14 21:03:04  bernie
+ *#* PURE_FUNC, CONST_FUNC, MUST_CHECK: New function attributes; LIKELY()/UNLIKELY(): Fix for non-integral expressions.
+ *#*
  *#* Revision 1.21  2004/09/06 21:38:31  bernie
  *#* Misc documentation and style fixes.
  *#*
@@ -152,16 +166,25 @@
 
 #elif defined(__GNUC__)
 
+       /* Compiler features */
+       #define COMPILER_VARIADIC_MACROS 1 /* Even in C++ */
+       #define COMPILER_TYPEOF 1
+       #define COMPILER_STAEMENT_EXPRESSIONS 1
+
        /* GCC attributes */
        #define FORMAT(type,fmt,first)  __attribute__((__format__(type, fmt, first)))
        #define NORETURN                __attribute__((__noreturn__))
        #define UNUSED(type,arg)        __attribute__((__unused__)) type arg
        #define INLINE                  static inline __attribute__((__always_inline__))
-       #define LIKELY(x)               __builtin_expect((x), 1)
-       #define UNLIKELY(x)             __builtin_expect((x), 0)
-       #define RESTRICT                __restrict__
+       #define LIKELY(x)               __builtin_expect(!!(x), 1)
+       #define UNLIKELY(x)             __builtin_expect(!!(x), 0)
+       #define PURE_FUNC               __attribute__((pure))
+       #define CONST_FUNC              __attribute__((const))
+       #define UNUSED_FUNC             __attribute__((unused))
+       #define RESTRICT                __restrict__
+       #define MUST_CHECK              __attribute__((warn_unused_result))
        #if GNUC_PREREQ(3,1)
-               #define DEPRECATED      __attribute__((__deprecated__))
+               #define DEPRECATED  __attribute__((__deprecated__))
        #endif
 
        #if CPU_X86
@@ -178,22 +201,32 @@
                #include <stddef.h>
                #include <stdbool.h>
 
-               /* Missing printf-family functions in avr-libc/stdio.h */
-               #include <stdarg.h>
-               #include <avr/pgmspace.h>
-               int vsprintf_P(char *buf, const char * PROGMEM fmt, va_list ap);
-
                /* Support for harvard architectures */
                #ifdef _PROGMEM
                        #define PGM_READ_CHAR(s) pgm_read_byte(s)
                        #define PGM_FUNC(x) x ## _P
-                       #define PGM_ATTR        PROGMEM
+                       #define PGM_ATTR  PROGMEM
                #endif
 
        #endif
 
+       #ifndef __cplusplus
+               /*
+                * Disallow some C++ keywords as identifiers in C programs,
+                * for improved portability.
+                */
+               #pragma GCC poison new delete class template typename
+               #pragma GCC poison private protected public operator
+               #pragma GCC poison friend mutable using namespace
+               #pragma GCC poison cin cout cerr clog
+       #endif
+
 #elif defined(__MWERKS__) && CPU_DSP56K
 
+       /* Compiler features */
+       #define COMPILER_TYPEOF 1
+       #define COMPILER_STAEMENT_EXPRESSIONS 1
+
        #include <stdint.h>
        #include <stddef.h>
        #include <stdbool.h>
@@ -207,6 +240,32 @@
 #endif
 
 
+/* Defaults for compiler extensions. */
+
+/*!
+ * \def COMPILER_VARIADIC_MACROS
+ * Support for macros with variable arguments.
+ */
+#ifndef COMPILER_HAVE_VARIADIC_MACROS
+#define COMPILER_HAVE_VARIADIC_MACROS (COMPILER_C99 != 0)
+#endif
+
+/*!
+ * \def COMPILER_TYPEOF
+ * Support for macros with variable arguments.
+ */
+#ifndef COMPILER_TYPEOF
+#define COMPILER_TYPEOF 0
+#endif
+
+/*!
+ * \def COMPILER_STATEMENT_EXPRESSIONS
+ * Support for macros with variable arguments.
+ */
+#ifndef COMPILER_STATEMENT_EXPRESSIONS 0
+#define COMPILER_STATEMENT_EXPRESSIONS 0
+#endif
+
 /* A few defaults for missing compiler features. */
 #ifndef INLINE
 #define INLINE                 static inline
@@ -235,8 +294,20 @@
 #ifndef UNLIKELY
 #define UNLIKELY(x)            x
 #endif
+#ifndef PURE_FUNC
+#define PURE_FUNC              /* nothing */
+#endif
+#ifndef CONST_FUNC
+#define CONST_FUNC             /* nothing */
+#endif
+#ifndef UNUSED_FUNC
+#define UNUSED_FUNC            /* nothing */
+#endif
 #ifndef RESTRICT
-#define RESTRICT
+#define RESTRICT               /* nothing */
+#endif
+#ifndef MUST_CHECK
+#define MUST_CHECK             /* nothing */
 #endif
 
 /* Support for harvard architectures */
@@ -265,9 +336,11 @@
 
 /* Support for hybrid C/C++ applications. */
 #ifdef __cplusplus
+       #define EXTERN_C        extern "C"
        #define EXTERN_C_BEGIN  extern "C" {
        #define EXTERN_C_END    }
 #else
+       #define EXTERN_C        extern
        #define EXTERN_C_BEGIN  /* nothing */
        #define EXTERN_C_END    /* nothing */
 #endif