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| Rev | Author | Line No. | Line |
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| 495 | giacomo | 1 | /* |
| 2 | * Copyright (c) 1996 The University of Utah and |
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| 3 | * the Computer Systems Laboratory at the University of Utah (CSL). |
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| 4 | * All rights reserved. |
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| 5 | * |
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| 6 | * Permission to use, copy, modify and distribute this software is hereby |
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| 7 | * granted provided that (1) source code retains these copyright, permission, |
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| 8 | * and disclaimer notices, and (2) redistributions including binaries |
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| 9 | * reproduce the notices in supporting documentation, and (3) all advertising |
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| 10 | * materials mentioning features or use of this software display the following |
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| 11 | * acknowledgement: ``This product includes software developed by the |
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| 12 | * Computer Systems Laboratory at the University of Utah.'' |
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| 13 | * |
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| 14 | * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS |
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| 15 | * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF |
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| 16 | * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. |
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| 17 | * |
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| 18 | * CSL requests users of this software to return to csl-dist@cs.utah.edu any |
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| 19 | * improvements that they make and grant CSL redistribution rights. |
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| 20 | */ |
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| 21 | /* |
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| 22 | * Linux timer support. |
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| 23 | */ |
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| 24 | |||
| 25 | #include <linuxcomp.h> |
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| 26 | |||
| 27 | #include <linux/kernel.h> |
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| 28 | #include <linux/timer.h> |
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| 29 | #include <asm/param.h> |
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| 30 | |||
| 31 | //#define TIMER_DEBUG |
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| 32 | |||
| 33 | //#define IANPATCH |
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| 34 | #ifndef IANPATCH |
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| 35 | |||
| 36 | static inline void jiffies_to_timespec(unsigned long j, struct timespec *value) |
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| 37 | { |
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| 38 | value->tv_nsec = (j % HZ) * (1000000000L / HZ); |
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| 39 | value->tv_sec = j / HZ; |
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| 40 | } |
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| 41 | |||
| 42 | void add_timer(struct timer_list *timer) |
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| 43 | { |
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| 44 | struct timespec timeout; |
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| 45 | |||
| 46 | jiffies_to_timespec(timer->expires, &timeout); |
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| 47 | if (timer->function) |
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| 48 | timer->event_timer = shark_event_post(&timeout, (void (*)(void *))timer->function, (void *)timer->data); |
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| 49 | |||
| 50 | #ifdef TIMER_DEBUG |
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| 51 | cprintf("Set to %ld:%ld\n",timeout.tv_sec,timeout.tv_nsec); |
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| 52 | #endif |
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| 53 | } |
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| 54 | |||
| 55 | |||
| 56 | int del_timer(struct timer_list *timer) |
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| 57 | { |
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| 58 | shark_event_delete(timer->event_timer); |
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| 59 | return 0; /* TODO */ |
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| 60 | } |
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| 61 | |||
| 62 | int mod_timer(struct timer_list *timer, unsigned long expires) |
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| 63 | { |
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| 64 | shark_event_delete(timer->event_timer); |
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| 65 | timer->expires = expires; |
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| 66 | add_timer(timer); |
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| 67 | return 0; /* TODO */ |
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| 68 | } |
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| 69 | |||
| 70 | void init_timer(struct timer_list * timer) |
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| 71 | { |
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| 72 | timer->event_timer = -1; |
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| 73 | timer->function = NULL; |
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| 74 | } |
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| 75 | |||
| 76 | int timer_pending(struct timer_list * timer){ |
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| 77 | return timer->event_timer != -1; |
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| 78 | } |
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| 79 | |||
| 80 | #else |
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| 81 | |||
| 82 | /* CHECK!!!! */ |
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| 83 | |||
| 84 | #include <pthread.h> |
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| 85 | |||
| 86 | /*Needs to have this sort of thing in the initfile |
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| 87 | * PTHREAD_register_module(1, 0, 1); |
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| 88 | * |
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| 89 | * TIMER_register_module(); |
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| 90 | * PI_register_module(); |
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| 91 | * PC_register_module(); |
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| 92 | */ |
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| 93 | |||
| 94 | pthread_attr_t task_attr; /* attributtes for the task doing the callback*/ |
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| 95 | |||
| 96 | static inline void |
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| 97 | jiffies_to_timespec(unsigned long j, struct timespec *value) |
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| 98 | { |
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| 99 | value->tv_nsec = (j % HZ) * (1000000000L / HZ); |
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| 100 | value->tv_sec = j / HZ; |
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| 101 | } |
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| 102 | |||
| 103 | int add_timer(struct timer_list *timer) |
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| 104 | { |
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| 105 | int err; |
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| 106 | struct sigevent ev; |
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| 107 | struct sched_param task_param; |
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| 108 | struct itimerspec timeout; |
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| 109 | |||
| 110 | ev.sigev_notify = SIGEV_THREAD; |
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| 111 | ev.sigev_value.sival_int = timer->data; |
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| 112 | ev.sigev_notify_function = timer->function; |
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| 113 | ev.sigev_notify_attributes = &task_attr; |
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| 114 | |||
| 115 | pthread_attr_init(&task_attr); |
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| 116 | pthread_attr_setdetachstate(&task_attr, PTHREAD_CREATE_DETACHED); |
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| 117 | pthread_attr_setschedpolicy(&task_attr, SCHED_RR); |
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| 118 | task_param.sched_priority = 10; |
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| 119 | pthread_attr_setschedparam(&task_attr, &task_param); |
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| 120 | |||
| 121 | err =timer_create(CLOCK_REALTIME, &ev, &(timer->sharktimer)); |
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| 122 | if (err !=0 ) { cprintf("timer: unable to create timer\n"); } |
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| 123 | |||
| 124 | timeout.it_interval.tv_sec=0; |
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| 125 | timeout.it_interval.tv_nsec=0; |
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| 126 | jiffies_to_timespec(timer->expires, &(timeout.it_value)); |
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| 127 | |||
| 128 | err = timer_settime(timer->sharktimer, 0, &timeout, NULL); |
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| 129 | if (err !=0 ) { cprintf("timer: unable to timer_settime\n"); } |
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| 130 | |||
| 131 | return err; |
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| 132 | } |
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| 133 | |||
| 134 | |||
| 135 | void del_timer(struct timer_list *timer) |
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| 136 | { |
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| 137 | timer_delete(timer->sharktimer); |
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| 138 | } |
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| 139 | |||
| 140 | void mod_timer(struct timer_list *timer, unsigned long expires) |
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| 141 | { |
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| 142 | timer_delete(timer->sharktimer); |
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| 143 | timer->expires=expires; |
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| 144 | add_timer(timer); |
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| 145 | } |
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| 146 | |||
| 147 | void init_timer(struct timer_list * timer) |
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| 148 | { |
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| 149 | } |
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| 150 | |||
| 151 | #endif |