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| Rev | Author | Line No. | Line |
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| 2938 | svoboda | 1 | /* |
| 2 | * Copyright (c) 2008 Jiri Svoboda |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | /** @addtogroup debug |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 35 | #include <stdlib.h> |
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| 36 | #include <libadt/list.h> |
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| 2939 | svoboda | 37 | #include <assert.h> |
| 38 | #include <futex.h> |
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| 39 | #include <async.h> |
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| 2938 | svoboda | 40 | |
| 41 | #include "dthread.h" |
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| 42 | |||
| 43 | static int last_thread_id = 0; |
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| 44 | |||
| 45 | link_t dthreads; /* List of application's threads */ |
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| 46 | dthread_t *cwt; /* Current working thread */ |
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| 47 | |||
| 48 | dthread_t *dthread_new(thash_t hash) |
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| 49 | { |
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| 50 | dthread_t *dt; |
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| 51 | |||
| 52 | dt = malloc(sizeof(dthread_t)); |
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| 53 | if (!dt) { |
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| 54 | exit(1); |
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| 55 | } |
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| 56 | |||
| 57 | dt->id = ++last_thread_id; |
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| 58 | dt->hash = hash; |
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| 2939 | svoboda | 59 | dt->fid = 0; |
| 60 | dt->stopped = 0; |
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| 2938 | svoboda | 61 | |
| 62 | if (!cwt) cwt = dt; |
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| 63 | |||
| 64 | list_append(&dt->link, &dthreads); |
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| 65 | |||
| 66 | return dt; |
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| 67 | } |
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| 68 | |||
| 69 | void dthread_delete(dthread_t *dt) |
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| 70 | { |
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| 71 | list_remove(&dt->link); |
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| 72 | free(dt); |
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| 73 | } |
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| 74 | |||
| 2939 | svoboda | 75 | /* |
| 76 | * Get dthread struct serviced by fibril fid. |
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| 77 | */ |
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| 78 | dthread_t *dthread_get_by_fid(fid_t fid) |
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| 79 | { |
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| 80 | link_t *cur; |
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| 81 | dthread_t *dt; |
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| 2938 | svoboda | 82 | |
| 2939 | svoboda | 83 | dt = NULL; |
| 84 | for (cur = dthreads.next; cur != &dthreads; cur = cur->next) { |
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| 85 | dt = list_get_instance(cur, dthread_t, link); |
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| 86 | if (dt->fid == fid) return dt; |
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| 87 | } |
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| 88 | |||
| 89 | return NULL; |
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| 90 | } |
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| 91 | |||
| 92 | /* |
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| 93 | * Get dthread struct for dthread serviced by the current fibril. |
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| 94 | */ |
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| 95 | dthread_t *dthread_get(void) |
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| 96 | { |
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| 97 | return dthread_get_by_fid(fibril_get_id()); |
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| 98 | } |
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| 99 | |||
| 100 | void dthread_stop_me(void) |
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| 101 | { |
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| 102 | dthread_t *dt; |
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| 103 | int i; |
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| 104 | |||
| 105 | dt = dthread_get(); |
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| 106 | assert(dt); |
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| 107 | |||
| 108 | futex_down(&async_futex); |
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| 109 | |||
| 110 | dt->stopped = 1; |
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| 111 | fibril_switch(FIBRIL_TO_MANAGER); |
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| 112 | |||
| 113 | futex_up(&async_futex); |
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| 114 | } |
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| 115 | |||
| 116 | void dthread_resume(dthread_t *dt) |
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| 117 | { |
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| 118 | if (!dt->stopped) return; |
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| 119 | |||
| 120 | futex_down(&async_futex); |
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| 121 | |||
| 122 | fibril_add_ready(dt->fid); |
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| 123 | dt->stopped = 0; |
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| 124 | |||
| 125 | futex_up(&async_futex); |
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| 126 | } |
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| 127 | |||
| 128 | |||
| 2938 | svoboda | 129 | /** @} |
| 130 | */ |