ctdb-include: Remove unused header file include/ctdb_typesafe_cb.h

Signed-off-by: Amitay Isaacs <amitay@gmail.com>
Reviewed-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>

Autobuild-User(master): Michael Adam <obnox@samba.org>
Autobuild-Date(master): Wed Oct 28 15:59:02 CET 2015 on sn-devel-104

1 files changed, 0 insertions, 177 deletions

diff --git a/ctdb/include/ctdb_typesafe_cb.h b/ctdb/include/ctdb_typesafe_cb.h
deleted file mode 100644
index b1f2c5f5b5e..00000000000
--- a/ctdb/include/ctdb_typesafe_cb.h
+++ /dev/null
@@ -1,177 +0,0 @@
-#ifndef CCAN_CAST_IF_TYPE_H
-#define CCAN_CAST_IF_TYPE_H
-
-#if (__GNUC__ >= 3)
-#define HAVE_TYPEOF 1
-#define HAVE_BUILTIN_CHOOSE_EXPR 1
-#define HAVE_BUILTIN_TYPES_COMPATIBLE_P 1
-#endif
-
-#if HAVE_TYPEOF && HAVE_BUILTIN_CHOOSE_EXPR && HAVE_BUILTIN_TYPES_COMPATIBLE_P
-/**
- * cast_if_type - only cast an expression if test matches a given type
- * @desttype: the type to cast to
- * @expr: the expression to cast
- * @test: the expression to test
- * @oktype: the type we allow
- *
- * This macro is used to create functions which allow multiple types.
- * The result of this macro is used somewhere that a @desttype type is
- * expected: if @expr was of type @oktype, it will be cast to
- * @desttype type.  As a result, if @expr is any type other than
- * @oktype or @desttype, a compiler warning will be issued.
- *
- * This macro can be used in static initializers.
- *
- * This is merely useful for warnings: if the compiler does not
- * support the primitives required for cast_if_type(), it becomes an
- * unconditional cast, and the @test and @oktype argument is not used.  In
- * particular, this means that @oktype can be a type which uses
- * the "typeof": it will not be evaluated if typeof is not supported.
- *
- * Example:
- *	// We can take either an unsigned long or a void *.
- *	void _set_some_value(void *val);
- *	#define set_some_value(e)			\
- *		_set_some_value(cast_if_type(void *, (e), (e), unsigned long))
- */
-#define cast_if_type(desttype, expr, test, oktype)			\
-__builtin_choose_expr(__builtin_types_compatible_p(typeof(1?(test):0), oktype), \
-			(desttype)(expr), (expr))
-#else
-#define cast_if_type(desttype, expr, test, oktype) ((desttype)(expr))
-#endif
-
-/**
- * cast_if_any - only cast an expression if it is one of the three given types
- * @desttype: the type to cast to
- * @expr: the expression to cast
- * @test: the expression to test
- * @ok1: the first type we allow
- * @ok2: the second type we allow
- * @ok3: the third type we allow
- *
- * This is a convenient wrapper for multiple cast_if_type() calls.  You can
- * chain them inside each other (ie. use cast_if_any() for expr) if you need
- * more than 3 arguments.
- *
- * Example:
- *	// We can take either a long, unsigned long, void * or a const void *.
- *	void _set_some_value(void *val);
- *	#define set_some_value(expr)					\
- *		_set_some_value(cast_if_any(void *, (expr), (expr),	\
- *					    long, unsigned long, const void *))
- */
-#define cast_if_any(desttype, expr, test, ok1, ok2, ok3)		\
-	cast_if_type(desttype,						\
-		     cast_if_type(desttype,				\
-				  cast_if_type(desttype, (expr), (test), ok1), \
-				  ok2),					\
-		     ok3)
-
-/**
- * typesafe_cb - cast a callback function if it matches the arg
- * @rtype: the return type of the callback function
- * @fn: the callback function to cast
- * @arg: the (pointer) argument to hand to the callback function.
- *
- * If a callback function takes a single argument, this macro does
- * appropriate casts to a function which takes a single void * argument if the
- * callback provided matches the @arg (or a const or volatile version).
- *
- * It is assumed that @arg is of pointer type: usually @arg is passed
- * or assigned to a void * elsewhere anyway.
- *
- * Example:
- *	void _register_callback(void (*fn)(void *arg), void *arg);
- *	#define register_callback(fn, arg) \
- *		_register_callback(typesafe_cb(void, (fn), (arg)), (arg))
- */
-#define typesafe_cb(rtype, fn, arg)			\
-	cast_if_type(rtype (*)(void *), (fn), (fn)(arg), rtype)
-
-/**
- * typesafe_cb_const - cast a const callback function if it matches the arg
- * @rtype: the return type of the callback function
- * @fn: the callback function to cast
- * @arg: the (pointer) argument to hand to the callback function.
- *
- * If a callback function takes a single argument, this macro does appropriate
- * casts to a function which takes a single const void * argument if the
- * callback provided matches the @arg.
- *
- * It is assumed that @arg is of pointer type: usually @arg is passed
- * or assigned to a void * elsewhere anyway.
- *
- * Example:
- *	void _register_callback(void (*fn)(const void *arg), const void *arg);
- *	#define register_callback(fn, arg) \
- *		_register_callback(typesafe_cb_const(void, (fn), (arg)), (arg))
- */
-#define typesafe_cb_const(rtype, fn, arg)				\
-	sizeof((fn)((const void *)0)),					\
-		cast_if_type(rtype (*)(const void *),			\
-			     (fn), (fn)(arg), rtype (*)(typeof(arg)))
-
-/**
- * typesafe_cb_preargs - cast a callback function if it matches the arg
- * @rtype: the return type of the callback function
- * @fn: the callback function to cast
- * @arg: the (pointer) argument to hand to the callback function.
- *
- * This is a version of typesafe_cb() for callbacks that take other arguments
- * before the @arg.
- *
- * Example:
- *	void _register_callback(void (*fn)(int, void *arg), void *arg);
- *	#define register_callback(fn, arg) \
- *		_register_callback(typesafe_cb_preargs(void, (fn), (arg), int),\
- *				   (arg))
- */
-#define typesafe_cb_preargs(rtype, fn, arg, ...)			\
-	cast_if_type(rtype (*)(__VA_ARGS__, void *), (fn), (fn),	\
-		     rtype (*)(__VA_ARGS__, typeof(arg)))
-/**
- * typesafe_cb_postargs - cast a callback function if it matches the arg
- * @rtype: the return type of the callback function
- * @fn: the callback function to cast
- * @arg: the (pointer) argument to hand to the callback function.
- *
- * This is a version of typesafe_cb() for callbacks that take other arguments
- * after the @arg.
- *
- * Example:
- *	void _register_callback(void (*fn)(void *arg, int), void *arg);
- *	#define register_callback(fn, arg) \
- *		_register_callback(typesafe_cb_postargs(void, (fn), (arg), int),\
- *				   (arg))
- */
-#define typesafe_cb_postargs(rtype, fn, arg, ...)			\
-	cast_if_type(rtype (*)(void *, __VA_ARGS__), (fn), (fn),	\
-		     rtype (*)(typeof(arg), __VA_ARGS__))
-/**
- * typesafe_cb_cmp - cast a compare function if it matches the arg
- * @rtype: the return type of the callback function
- * @fn: the callback function to cast
- * @arg: the (pointer) argument(s) to hand to the compare function.
- *
- * If a callback function takes two matching-type arguments, this macro does
- * appropriate casts to a function which takes two const void * arguments if
- * the callback provided takes two a const pointers to @arg.
- *
- * It is assumed that @arg is of pointer type: usually @arg is passed
- * or assigned to a void * elsewhere anyway.  Note also that the type
- * arg points to must be defined.
- *
- * Example:
- *	void _my_qsort(void *base, size_t nmemb, size_t size,
- *		       int (*cmp)(const void *, const void *));
- *	#define my_qsort(base, nmemb, cmpfn) \
- *		_my_qsort((base), (nmemb), sizeof(*(base)), \
- *			  typesafe_cb_cmp(int, (cmpfn), (base)), (arg))
- */
-#define typesafe_cb_cmp(rtype, cmpfn, arg)				\
-	cast_if_type(rtype (*)(const void *, const void *), (cmpfn),	\
-		     rtype (*)(const typeof(*arg)*, const typeof(*arg)*))
-		     
-#endif /* CCAN_CAST_IF_TYPE_H */