| 1 | /*
|
|---|
| 2 | * Copyright (C) 2006 Ondrej Palkovsky
|
|---|
| 3 | * All rights reserved.
|
|---|
| 4 | *
|
|---|
| 5 | * Redistribution and use in source and binary forms, with or without
|
|---|
| 6 | * modification, are permitted provided that the following conditions
|
|---|
| 7 | * are met:
|
|---|
| 8 | *
|
|---|
| 9 | * - Redistributions of source code must retain the above copyright
|
|---|
| 10 | * notice, this list of conditions and the following disclaimer.
|
|---|
| 11 | * - Redistributions in binary form must reproduce the above copyright
|
|---|
| 12 | * notice, this list of conditions and the following disclaimer in the
|
|---|
| 13 | * documentation and/or other materials provided with the distribution.
|
|---|
| 14 | * - The name of the author may not be used to endorse or promote products
|
|---|
| 15 | * derived from this software without specific prior written permission.
|
|---|
| 16 | *
|
|---|
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|---|
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|---|
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|---|
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|---|
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|---|
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|---|
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|---|
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|---|
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|---|
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|---|
| 27 | */
|
|---|
| 28 |
|
|---|
| 29 | #ifndef __LIBC__PSTHREAD_H__
|
|---|
| 30 | #define __LIBC__PSTHREAD_H__
|
|---|
| 31 |
|
|---|
| 32 | #include <libarch/psthread.h>
|
|---|
| 33 | #include <libadt/list.h>
|
|---|
| 34 | #include <libarch/thread.h>
|
|---|
| 35 |
|
|---|
| 36 | #ifndef context_set
|
|---|
| 37 | #define context_set(c, _pc, stack, size, ptls) \
|
|---|
| 38 | (c)->pc = (sysarg_t) (_pc); \
|
|---|
| 39 | (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA; \
|
|---|
| 40 | (c)->tls = (sysarg_t) (ptls);
|
|---|
| 41 | #endif /* context_set */
|
|---|
| 42 |
|
|---|
| 43 | typedef enum {
|
|---|
| 44 | PS_TO_MANAGER,
|
|---|
| 45 | PS_FROM_MANAGER,
|
|---|
| 46 | PS_PREEMPT
|
|---|
| 47 | } pschange_type;
|
|---|
| 48 |
|
|---|
| 49 | typedef sysarg_t pstid_t;
|
|---|
| 50 |
|
|---|
| 51 | struct psthread_data {
|
|---|
| 52 | link_t link;
|
|---|
| 53 | context_t ctx;
|
|---|
| 54 | void *stack;
|
|---|
| 55 | void *arg;
|
|---|
| 56 | int (*func)(void *);
|
|---|
| 57 | tcb_t *tcb;
|
|---|
| 58 |
|
|---|
| 59 | struct psthread_data *waiter;
|
|---|
| 60 | int finished;
|
|---|
| 61 | int retval;
|
|---|
| 62 | int flags;
|
|---|
| 63 | };
|
|---|
| 64 | typedef struct psthread_data psthread_data_t;
|
|---|
| 65 |
|
|---|
| 66 | extern int context_save(context_t *c);
|
|---|
| 67 | extern void context_restore(context_t *c) __attribute__ ((noreturn));
|
|---|
| 68 |
|
|---|
| 69 | pstid_t psthread_create(int (*func)(void *), void *arg);
|
|---|
| 70 | int psthread_join(pstid_t psthrid);
|
|---|
| 71 | psthread_data_t * psthread_setup(void);
|
|---|
| 72 | void psthread_teardown(psthread_data_t *pt);
|
|---|
| 73 | int psthread_schedule_next_adv(pschange_type ctype);
|
|---|
| 74 | void psthread_add_ready(pstid_t ptid);
|
|---|
| 75 | void psthread_add_manager(pstid_t psthrid);
|
|---|
| 76 | void psthread_remove_manager(void);
|
|---|
| 77 | pstid_t psthread_get_id(void);
|
|---|
| 78 |
|
|---|
| 79 | static inline int psthread_schedule_next() {
|
|---|
| 80 | return psthread_schedule_next_adv(PS_PREEMPT);
|
|---|
| 81 | }
|
|---|
| 82 |
|
|---|
| 83 |
|
|---|
| 84 | #endif
|
|---|
