Contiki 2.6

sym.h

00001 /*
00002  * Copyright (c) 2007, Swedish Institute of Computer Science
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * @(#)$Id: sym.h,v 1.1 2007/04/25 15:33:29 bg- Exp $
00030  */
00031 
00032 #ifndef SYM_H
00033 #define SYM_H
00034 
00035 typedef void (*sym_func_t)();
00036 
00037 /*
00038  * Even with an explicit cast, it is invalid to convert a function
00039  * pointer to an object pointer or a pointer to void, or vice-versa.
00040  */
00041 union sym_value {
00042   void *obj;                    /* Object pointer */
00043   sym_func_t func;              /* or function pointer */
00044 };
00045 
00046 struct sym_bol {
00047   const char *name;
00048   union sym_value value;
00049 };
00050 
00051 /* Lookup a pointer to an ANSI C object. */
00052 void *sym_object(const char *name);
00053 
00054 /* Lookup a pointer to an ANSI C function. */
00055 sym_func_t sym_function(const char *name);
00056 
00057 extern const int sym_obj_nelts;
00058 extern const int sym_func_nelts;
00059 
00060 extern const struct sym_bol sym_obj[/* sym_obj_nelts */];
00061 extern const struct sym_bol sym_func[/* sym_func__nelts */];
00062 
00063 #endif /* SYM_H */