[a9153ec] | 1 | /** |
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| 2 | * @file |
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| 3 | * |
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| 4 | * @ingroup rtems_bsd_rtems |
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| 5 | * |
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| 6 | * @brief TODO. |
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| 7 | */ |
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| 8 | |
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| 9 | /* |
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[8420b94] | 10 | * Copyright (c) 2009, 2010 embedded brains GmbH. |
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| 11 | * All rights reserved. |
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[a9153ec] | 12 | * |
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| 13 | * embedded brains GmbH |
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| 14 | * Obere Lagerstr. 30 |
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| 15 | * 82178 Puchheim |
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| 16 | * Germany |
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| 17 | * <rtems@embedded-brains.de> |
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| 18 | * |
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[8420b94] | 19 | * Redistribution and use in source and binary forms, with or without |
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| 20 | * modification, are permitted provided that the following conditions |
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| 21 | * are met: |
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| 22 | * 1. Redistributions of source code must retain the above copyright |
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| 23 | * notice, this list of conditions and the following disclaimer. |
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| 24 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 25 | * notice, this list of conditions and the following disclaimer in the |
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| 26 | * documentation and/or other materials provided with the distribution. |
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| 27 | * |
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| 28 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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| 29 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 30 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 31 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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| 32 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 33 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 34 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 35 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 36 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 37 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 38 | * SUCH DAMAGE. |
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[a9153ec] | 39 | */ |
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| 40 | |
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| 41 | /* Necessary to obtain some internal functions */ |
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| 42 | #define __RTEMS_VIOLATE_KERNEL_VISIBILITY__ |
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| 43 | |
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[6ad03bf] | 44 | #include <freebsd/machine/rtems-bsd-config.h> |
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[a9153ec] | 45 | |
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| 46 | #include <rtems/posix/cond.h> |
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| 47 | |
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[6ad03bf] | 48 | #include <freebsd/sys/param.h> |
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| 49 | #include <freebsd/sys/types.h> |
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| 50 | #include <freebsd/sys/systm.h> |
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| 51 | #include <freebsd/sys/lock.h> |
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| 52 | #include <freebsd/sys/mutex.h> |
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| 53 | #include <freebsd/sys/condvar.h> |
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[a9153ec] | 54 | |
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| 55 | RTEMS_CHAIN_DEFINE_EMPTY(rtems_bsd_condvar_chain); |
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| 56 | |
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| 57 | void |
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| 58 | cv_init(struct cv *cv, const char *desc) |
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| 59 | { |
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| 60 | int rv = pthread_cond_init(&cv->cv_id, NULL); |
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| 61 | |
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| 62 | BSD_ASSERT_RV(rv); |
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| 63 | |
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| 64 | cv->cv_description = desc; |
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| 65 | |
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| 66 | rtems_chain_append(&rtems_bsd_condvar_chain, &cv->cv_node); |
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| 67 | } |
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| 68 | |
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| 69 | void |
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| 70 | cv_destroy(struct cv *cv) |
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| 71 | { |
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| 72 | int rv = pthread_cond_destroy(&cv->cv_id); |
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| 73 | |
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| 74 | BSD_ASSERT_RV(rv); |
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| 75 | |
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| 76 | rtems_chain_extract(&cv->cv_node); |
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| 77 | } |
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| 78 | |
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| 79 | static int _cv_wait_support(struct cv *cv, struct lock_object *lock, int timo, bool relock) |
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| 80 | { |
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| 81 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
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| 82 | int eno = 0; |
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| 83 | Objects_Locations location = OBJECTS_ERROR; |
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| 84 | POSIX_Condition_variables_Control *pcv = _POSIX_Condition_variables_Get(&cv->cv_id, &location); |
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| 85 | |
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| 86 | if (location == OBJECTS_LOCAL) { |
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| 87 | if (pcv->Mutex != POSIX_CONDITION_VARIABLES_NO_MUTEX && pcv->Mutex != lock->lo_id) { |
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| 88 | _Thread_Enable_dispatch(); |
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| 89 | |
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| 90 | BSD_ASSERT(false); |
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| 91 | |
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| 92 | return EINVAL; |
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| 93 | } |
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| 94 | |
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| 95 | sc = rtems_semaphore_release(lock->lo_id); |
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| 96 | if (sc != RTEMS_SUCCESSFUL) { |
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| 97 | _Thread_Enable_dispatch(); |
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| 98 | |
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| 99 | BSD_ASSERT(false); |
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| 100 | |
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| 101 | return EINVAL; |
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| 102 | } |
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| 103 | |
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| 104 | pcv->Mutex = lock->lo_id; |
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| 105 | |
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| 106 | _Thread_queue_Enter_critical_section(&pcv->Wait_queue); |
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| 107 | _Thread_Executing->Wait.return_code = 0; |
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| 108 | _Thread_Executing->Wait.queue = &pcv->Wait_queue; |
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| 109 | _Thread_Executing->Wait.id = cv->cv_id; |
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| 110 | |
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| 111 | /* FIXME: Integer conversion */ |
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| 112 | _Thread_queue_Enqueue(&pcv->Wait_queue, (Watchdog_Interval) timo); |
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| 113 | |
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| 114 | DROP_GIANT(); |
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| 115 | |
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| 116 | _Thread_Enable_dispatch(); |
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| 117 | |
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| 118 | PICKUP_GIANT(); |
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| 119 | |
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| 120 | eno = (int) _Thread_Executing->Wait.return_code; |
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| 121 | if (eno != 0) { |
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| 122 | if (eno == ETIMEDOUT) { |
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| 123 | eno = EWOULDBLOCK; |
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| 124 | } else { |
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| 125 | BSD_ASSERT(false); |
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| 126 | |
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| 127 | eno = EINVAL; |
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| 128 | } |
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| 129 | } |
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| 130 | |
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| 131 | if (relock) { |
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| 132 | sc = rtems_semaphore_obtain(lock->lo_id, RTEMS_WAIT, RTEMS_NO_TIMEOUT); |
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| 133 | if (sc != RTEMS_SUCCESSFUL) { |
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| 134 | BSD_ASSERT(false); |
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| 135 | |
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| 136 | eno = EINVAL; |
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| 137 | } |
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| 138 | } |
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| 139 | |
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| 140 | return eno; |
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| 141 | } |
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| 142 | |
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| 143 | BSD_PANIC("unexpected object location"); |
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| 144 | } |
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| 145 | |
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| 146 | void |
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| 147 | _cv_wait(struct cv *cv, struct lock_object *lock) |
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| 148 | { |
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| 149 | _cv_wait_support(cv, lock, 0, true); |
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| 150 | } |
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| 151 | |
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| 152 | void |
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| 153 | _cv_wait_unlock(struct cv *cv, struct lock_object *lock) |
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| 154 | { |
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| 155 | _cv_wait_support(cv, lock, 0, false); |
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| 156 | } |
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| 157 | |
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| 158 | int |
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| 159 | _cv_timedwait(struct cv *cv, struct lock_object *lock, int timo) |
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| 160 | { |
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| 161 | if (timo <= 0) { |
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| 162 | timo = 1; |
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| 163 | } |
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| 164 | |
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| 165 | return _cv_wait_support(cv, lock, timo, true); |
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| 166 | } |
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| 167 | |
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| 168 | void |
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| 169 | cv_signal(struct cv *cv) |
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| 170 | { |
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| 171 | int rv = pthread_cond_signal(&cv->cv_id); |
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| 172 | |
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| 173 | BSD_ASSERT_RV(rv); |
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| 174 | } |
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| 175 | |
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| 176 | void |
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| 177 | cv_broadcastpri(struct cv *cv, int pri) |
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| 178 | { |
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| 179 | int rv = 0; |
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| 180 | |
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| 181 | BSD_ASSERT(pri == 0); |
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| 182 | |
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| 183 | rv = pthread_cond_broadcast(&cv->cv_id); |
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| 184 | BSD_ASSERT_RV(rv); |
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| 185 | } |
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