include/psthread.h

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00001 /*
00002  * Copyright (C) 2006 Ondrej Palkovsky
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  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00035 #ifndef __LIBC__PSTHREAD_H__
00036 #define __LIBC__PSTHREAD_H__
00037 
00038 #include <libarch/psthread.h>
00039 #include <libadt/list.h>
00040 #include <libarch/thread.h>
00041 
00042 #ifndef context_set
00043 #define context_set(c, _pc, stack, size, ptls)                  \
00044         (c)->pc = (sysarg_t) (_pc);                             \
00045         (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA;     \
00046         (c)->tls = (sysarg_t) (ptls);
00047 #endif /* context_set */
00048 
00049 #define PSTHREAD_SERIALIZED   1
00050 
00051 typedef enum {
00052         PS_TO_MANAGER,
00053         PS_FROM_MANAGER,
00054         PS_PREEMPT,
00055         PS_FROM_DEAD
00056 } pschange_type;
00057 
00058 typedef sysarg_t pstid_t;
00059 
00060 struct psthread_data {
00061         link_t link;
00062         context_t ctx;
00063         void *stack;
00064         void *arg;
00065         int (*func)(void *);
00066         tcb_t *tcb;
00067 
00068         struct psthread_data *waiter;
00069         int finished;
00070         int retval;
00071         int flags;
00072 };
00073 typedef struct psthread_data psthread_data_t;
00074 
00075 extern int context_save(context_t *c);
00076 extern void context_restore(context_t *c) __attribute__ ((noreturn));
00077 
00078 pstid_t psthread_create(int (*func)(void *), void *arg);
00079 int psthread_join(pstid_t psthrid);
00080 psthread_data_t * psthread_setup(void);
00081 void psthread_teardown(psthread_data_t *pt);
00082 int psthread_schedule_next_adv(pschange_type ctype);
00083 void psthread_add_ready(pstid_t ptid);
00084 void psthread_add_manager(pstid_t psthrid);
00085 void psthread_remove_manager(void);
00086 pstid_t psthread_get_id(void);
00087 void psthread_inc_sercount(void);
00088 void psthread_dec_sercount(void);
00089 
00090 static inline int psthread_schedule_next() {
00091         return psthread_schedule_next_adv(PS_PREEMPT);
00092 }
00093 
00094 
00095 #endif
00096 
00097 

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