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| 2 | pj | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 10 | * (see the web pages for full authors list) |
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| 11 | * |
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| 12 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 13 | * |
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| 14 | * http://www.sssup.it |
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| 15 | * http://retis.sssup.it |
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| 16 | * http://shark.sssup.it |
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| 17 | */ |
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| 18 | |||
| 19 | /** |
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| 20 | ------------ |
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| 21 | CVS : $Id: endcycle.c,v 1.1.1.1 2002-03-29 14:12:51 pj Exp $ |
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| 22 | |||
| 23 | File: $File$ |
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| 24 | Revision: $Revision: 1.1.1.1 $ |
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| 25 | Last update: $Date: 2002-03-29 14:12:51 $ |
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| 26 | ------------ |
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| 27 | |||
| 28 | Kernel module registration and miscellaneous functions |
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| 29 | |||
| 30 | This file contains: |
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| 31 | |||
| 32 | task_endcycle |
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| 33 | |||
| 34 | **/ |
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| 35 | |||
| 36 | /* |
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| 37 | * Copyright (C) 2000 Paolo Gai |
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| 38 | * |
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| 39 | * This program is free software; you can redistribute it and/or modify |
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| 40 | * it under the terms of the GNU General Public License as published by |
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| 41 | * the Free Software Foundation; either version 2 of the License, or |
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| 42 | * (at your option) any later version. |
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| 43 | * |
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| 44 | * This program is distributed in the hope that it will be useful, |
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| 45 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 46 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 47 | * GNU General Public License for more details. |
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| 48 | * |
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| 49 | * You should have received a copy of the GNU General Public License |
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| 50 | * along with this program; if not, write to the Free Software |
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| 51 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 52 | * |
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| 53 | */ |
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| 54 | |||
| 55 | #include <stdarg.h> |
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| 56 | #include <ll/ll.h> |
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| 57 | #include <ll/stdlib.h> |
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| 58 | #include <ll/stdio.h> |
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| 59 | #include <ll/string.h> |
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| 60 | #include <kernel/config.h> |
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| 61 | #include <kernel/model.h> |
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| 62 | #include <kernel/const.h> |
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| 63 | #include <sys/types.h> |
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| 64 | #include <kernel/types.h> |
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| 65 | #include <kernel/descr.h> |
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| 66 | #include <errno.h> |
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| 67 | #include <kernel/var.h> |
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| 68 | #include <kernel/func.h> |
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| 69 | #include <kernel/trace.h> |
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| 70 | |||
| 71 | |||
| 72 | /*+ |
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| 73 | Suspend the executing periodic task till the next period |
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| 74 | |||
| 75 | The executing task will be now placed into the right queue... |
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| 76 | normally, it goes also in the idle state if it is periodic or |
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| 77 | in the sleep state if it is aperiodic. |
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| 78 | |||
| 79 | I.e., if the task is an hard-periodic task & we are calling the |
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| 80 | task_endcycle, then it cannot be over the deadline because the |
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| 81 | timer should detect this; anyway it could be finishing just on |
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| 82 | the deadline! In this case, we must place it into a ready queue |
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| 83 | +*/ |
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| 84 | void task_endcycle(void) |
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| 85 | { |
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| 86 | LEVEL l; /* for readableness only */ |
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| 87 | TIME tx; /* a dummy TIME for timespec operations */ |
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| 88 | struct timespec ty; /* a dummy timespec for timespec operations */ |
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| 89 | |||
| 90 | proc_table[exec_shadow].context = kern_context_save(); |
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| 91 | |||
| 92 | /* SAME AS SCHEDULER... manage the capacity event and the load_info */ |
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| 93 | ll_gettime(TIME_EXACT, &schedule_time); |
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| 94 | SUBTIMESPEC(&schedule_time, &cap_lasttime, &ty); |
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| 95 | tx = TIMESPEC2USEC(&ty); |
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| 96 | proc_table[exec_shadow].avail_time -= tx; |
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| 97 | jet_update_slice(tx); |
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| 98 | if (cap_timer != NIL) { |
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| 99 | event_delete(cap_timer); |
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| 100 | cap_timer = NIL; |
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| 101 | } |
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| 102 | |||
| 103 | l = proc_table[exec_shadow].task_level; |
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| 104 | level_table[l]->task_endcycle(l,exec_shadow); |
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| 105 | |||
| 106 | /* Update the Jet data... */ |
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| 107 | jet_update_endcycle(); |
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| 108 | |||
| 109 | /* tracer stuff */ |
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| 110 | trc_logevent(TRC_ENDCYCLE,&exec_shadow); |
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| 111 | |||
| 112 | exec = exec_shadow = -1; |
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| 113 | scheduler(); |
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| 114 | kern_context_load(proc_table[exec_shadow].context); |
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| 115 | } |