thread.h

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00001 #ifndef _SYS_THREAD_H_
00002 #define _SYS_THREAD_H_
00003 
00004 /*
00005  * Copyright (C) 2001-2006 by egnite Software GmbH. All rights reserved.
00006  *
00007  * Redistribution and use in source and binary forms, with or without
00008  * modification, are permitted provided that the following conditions
00009  * are met:
00010  *
00011  * 1. Redistributions of source code must retain the above copyright
00012  *    notice, this list of conditions and the following disclaimer.
00013  * 2. Redistributions in binary form must reproduce the above copyright
00014  *    notice, this list of conditions and the following disclaimer in the
00015  *    documentation and/or other materials provided with the distribution.
00016  * 3. Neither the name of the copyright holders nor the names of
00017  *    contributors may be used to endorse or promote products derived
00018  *    from this software without specific prior written permission.
00019  *
00020  * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
00021  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00022  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
00023  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
00024  * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
00025  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
00026  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
00027  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
00028  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00029  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
00030  * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00031  * SUCH DAMAGE.
00032  *
00033  * For additional information see http://www.ethernut.de/
00034  *
00035  * -
00036  * Portions Copyright (C) 2000 David J. Hudson <dave@humbug.demon.co.uk>
00037  *
00038  * This file is distributed in the hope that it will be useful, but WITHOUT
00039  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00040  * FITNESS FOR A PARTICULAR PURPOSE.
00041  *
00042  * You can redistribute this file and/or modify it under the terms of the GNU
00043  * General Public License (GPL) as published by the Free Software Foundation;
00044  * either version 2 of the License, or (at your discretion) any later version.
00045  * See the accompanying file "copying-gpl.txt" for more details.
00046  *
00047  * As a special exception to the GPL, permission is granted for additional
00048  * uses of the text contained in this file.  See the accompanying file
00049  * "copying-liquorice.txt" for details.
00050  */
00051 
00147 #include <sys/types.h>
00148 #include <cfg/memory.h>
00149 
00150 #include <stdint.h>
00151 
00152 #define DEADBEEF    0xDEADBEEF
00153 
00154 
00159 
00163 typedef struct _NUTTHREADINFO NUTTHREADINFO;
00164 
00172 struct _NUTTHREADINFO {
00173     NUTTHREADINFO *td_next;     
00174     NUTTHREADINFO *td_qnxt;     
00175     volatile unsigned int td_qpec;     
00176     char td_name[9];            
00177     uint8_t td_state;            
00178     uintptr_t td_sp;               
00179     uint8_t td_priority;         
00180     uint8_t *td_memory;          
00181     HANDLE td_timer;            
00182     volatile HANDLE td_queue;   
00183 #ifdef __NUT_EMULATION__    
00184     pthread_t td_pthread;       
00185     void (*td_fn) (void *);     
00186     void *td_arg;               
00187     pthread_cond_t td_cv;       
00188     uint16_t td_cs_level;        
00189 #endif
00190 };
00197 #define TDS_TERM        0       
00198 #define TDS_RUNNING     1       
00199 #define TDS_READY       2       
00200 #define TDS_SLEEP       3       
00202 
00203 #define SLEEP_MODE_NONE 0xff
00204 
00229 #ifndef NUT_THREAD_STACK_MULT
00230 #define NUT_THREAD_STACK_MULT   1
00231 #endif
00232 
00240 #ifndef NUT_THREAD_STACK_ADD
00241 #define NUT_THREAD_STACK_ADD    0
00242 #endif
00243 
00244 extern NUTTHREADINFO *runningThread;
00245 extern NUTTHREADINFO *nutThreadList;
00246 extern NUTTHREADINFO *runQueue;
00247 
00248 __BEGIN_DECLS
00249 /* Function prototypes. */
00250 #ifndef __NUT_EMULATION__   
00251 extern void NutThreadInit(void);
00252 #endif
00253 
00254 #if defined(__GNUC__) && defined (__AVR_ENHANCED__)
00255 extern uint8_t NutThreadSetSleepMode(uint8_t mode);
00256 #endif
00257 
00258 extern HANDLE NutThreadCreate(char *name, void (*fn) (void *), void *arg, size_t stackSize);
00259 extern uint8_t NutThreadSetPriority(uint8_t level);
00260 
00261 extern void NutThreadKill(void);
00262 extern void NutThreadDestroy(void);
00263 extern void NutThreadExit(void);
00264 
00265 extern void NutThreadResume(void);
00266 extern void NutThreadWake(HANDLE timer, HANDLE th);
00267 extern void NutThreadYield(void);
00268 
00269 extern void NutThreadAddPriQueue(NUTTHREADINFO * td, NUTTHREADINFO * volatile *tqpp);
00270 extern void NutThreadRemoveQueue(NUTTHREADINFO * td, NUTTHREADINFO * volatile *tqpp);
00271 
00272 extern void NutThreadSwitch(void);
00273 extern HANDLE GetThreadByName(char *name);
00274 
00275 extern NUTTHREADINFO *NutThreadStackCheck(size_t minsiz);
00276 extern size_t NutThreadStackAvailable(char *name);
00277 
00281 #define THREAD(threadfn, arg) \
00282 void threadfn(void *arg) __attribute__ ((noreturn)); \
00283 void threadfn(void *arg)
00284 
00285 __END_DECLS
00286 /* */
00287 #endif

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