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| 38 | 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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| 207 | giacomo | 21 | CVS : $Id: tskmsg.c,v 1.2 2003-07-22 11:56:06 giacomo Exp $ |
| 38 | pj | 22 | |
| 23 | File: $File$ |
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| 207 | giacomo | 24 | Revision: $Revision: 1.2 $ |
| 25 | Last update: $Date: 2003-07-22 11:56:06 $ |
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| 38 | pj | 26 | ------------ |
| 27 | |||
| 28 | **/ |
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| 29 | |||
| 30 | /* |
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| 31 | * Copyright (C) 2002 Paolo Gai |
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| 32 | * |
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| 33 | * This program is free software; you can redistribute it and/or modify |
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| 34 | * it under the terms of the GNU General Public License as published by |
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| 35 | * the Free Software Foundation; either version 2 of the License, or |
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| 36 | * (at your option) any later version. |
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| 37 | * |
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| 38 | * This program is distributed in the hope that it will be useful, |
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| 39 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 41 | * GNU General Public License for more details. |
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| 42 | * |
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| 43 | * You should have received a copy of the GNU General Public License |
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| 44 | * along with this program; if not, write to the Free Software |
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| 45 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 46 | * |
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| 47 | */ |
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| 48 | |||
| 49 | #include <stdarg.h> |
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| 50 | #include <ll/ll.h> |
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| 51 | #include <ll/stdlib.h> |
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| 52 | #include <ll/stdio.h> |
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| 53 | #include <ll/string.h> |
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| 54 | #include <kernel/config.h> |
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| 55 | #include <kernel/model.h> |
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| 56 | #include <kernel/const.h> |
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| 57 | #include <sys/types.h> |
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| 58 | #include <kernel/types.h> |
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| 59 | #include <kernel/descr.h> |
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| 60 | #include <errno.h> |
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| 61 | #include <kernel/var.h> |
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| 62 | #include <kernel/func.h> |
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| 63 | #include <kernel/trace.h> |
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| 64 | |||
| 65 | |||
| 66 | /* |
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| 67 | The running task (pointed by exec_shadow) sent a message m to the |
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| 68 | scheduling module that handle the task p. |
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| 69 | |||
| 70 | If the message has value NULL the behavior should be the |
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| 71 | task_endcycle primitive behavior, and an endcycle tracer event is |
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| 72 | generated. |
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| 73 | |||
| 74 | */ |
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| 207 | giacomo | 75 | int task_message(void *m, PID p, int reschedule) |
| 38 | pj | 76 | { |
| 77 | LEVEL l; /* for readableness only */ |
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| 78 | |||
| 79 | int retvalue; |
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| 207 | giacomo | 80 | |
| 81 | if (p == NIL) p = exec_shadow; |
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| 38 | pj | 82 | |
| 83 | if (reschedule) { |
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| 84 | proc_table[exec_shadow].context = kern_context_save(); |
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| 85 | |||
| 86 | kern_epilogue_macro(); |
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| 87 | |||
| 207 | giacomo | 88 | l = proc_table[p].task_level; |
| 89 | retvalue = level_table[l]->public_message(l,p,m); |
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| 38 | pj | 90 | |
| 91 | exec = exec_shadow = -1; |
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| 92 | scheduler(); |
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| 93 | |||
| 94 | kern_context_load(proc_table[exec_shadow].context); |
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| 95 | |||
| 96 | } else { |
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| 97 | SYS_FLAGS f; |
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| 98 | |||
| 99 | f = kern_fsave(); |
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| 207 | giacomo | 100 | l = proc_table[p].task_level; |
| 101 | retvalue = level_table[l]->public_message(l,p,m); |
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| 38 | pj | 102 | kern_frestore(f); |
| 103 | } |
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| 104 | |||
| 105 | return retvalue; |
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| 106 | } |