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| 1 | +/* |
| 2 | + * Copyright 2009-2012 Niels Provos and Nick Mathewson |
| 3 | + * |
| 4 | + * Redistribution and use in source and binary forms, with or without |
| 5 | + * modification, are permitted provided that the following conditions |
| 6 | + * are met: |
| 7 | + * 1. Redistributions of source code must retain the above copyright |
| 8 | + * notice, this list of conditions and the following disclaimer. |
| 9 | + * 2. Redistributions in binary form must reproduce the above copyright |
| 10 | + * notice, this list of conditions and the following disclaimer in the |
| 11 | + * documentation and/or other materials provided with the distribution. |
| 12 | + * 3. The name of the author may not be used to endorse or promote products |
| 13 | + * derived from this software without specific prior written permission. |
| 14 | + * |
| 15 | + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 16 | + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 17 | + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 18 | + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 21 | + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 22 | + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | + */ |
| 26 | +#include "event2/event-config.h" |
| 27 | +#include "opal/mca/threads/mutex.h" |
| 28 | +#include "opal/mca/threads/tsd.h" |
| 29 | +#include "opal/mca/threads/condition.h" |
| 30 | +#include "opal/mca/threads/threads.h" |
| 31 | +/* With glibc we need to define _GNU_SOURCE to get PTHREAD_MUTEX_RECURSIVE. |
| 32 | + * This comes from evconfig-private.h |
| 33 | + */ |
| 34 | + |
| 35 | +struct event_base; |
| 36 | +#include "event2/thread.h" |
| 37 | +#include "event2/util.h" |
| 38 | +#include <stdlib.h> |
| 39 | +#include <string.h> |
| 40 | + |
| 41 | + |
| 42 | +static void * |
| 43 | +evthread_opal_lock_alloc(unsigned locktype) |
| 44 | +{ |
| 45 | + opal_thread_internal_mutex_t *lock = malloc(sizeof(opal_thread_internal_mutex_t)); |
| 46 | + if (!lock) |
| 47 | + return NULL; |
| 48 | + if (opal_thread_internal_mutex_init(lock, locktype & EVTHREAD_LOCKTYPE_RECURSIVE)) { |
| 49 | + free(lock); |
| 50 | + return NULL; |
| 51 | + } |
| 52 | + return lock; |
| 53 | +} |
| 54 | + |
| 55 | +static void |
| 56 | +evthread_opal_lock_free(void *lock_, unsigned locktype) |
| 57 | +{ |
| 58 | + opal_thread_internal_mutex_t *lock = lock_; |
| 59 | + opal_thread_internal_mutex_destroy(lock); |
| 60 | + free(lock); |
| 61 | +} |
| 62 | + |
| 63 | +static int |
| 64 | +evthread_opal_lock(unsigned mode, void *lock_) |
| 65 | +{ |
| 66 | + opal_mutex_t *lock = lock_; |
| 67 | + if (mode & EVTHREAD_TRY) |
| 68 | + return opal_mutex_trylock(lock); |
| 69 | + else { |
| 70 | + opal_mutex_lock(lock); |
| 71 | + return 1; |
| 72 | + } |
| 73 | +} |
| 74 | + |
| 75 | +static int |
| 76 | +evthread_opal_unlock(unsigned mode, void *lock_) |
| 77 | +{ |
| 78 | + opal_mutex_t *lock = lock_; |
| 79 | + opal_mutex_unlock(lock); |
| 80 | + return 1; |
| 81 | +} |
| 82 | + |
| 83 | +static unsigned long |
| 84 | +evthread_opal_get_id(void) |
| 85 | +{ |
| 86 | + union { |
| 87 | + opal_thread_t thr; |
| 88 | +#if EVENT__SIZEOF_PTHREAD_T > EVENT__SIZEOF_LONG |
| 89 | + ev_uint64_t id; |
| 90 | +#else |
| 91 | + unsigned long id; |
| 92 | +#endif |
| 93 | + } r; |
| 94 | +#if EVENT__SIZEOF_PTHREAD_T < EVENT__SIZEOF_LONG |
| 95 | + memset(&r, 0, sizeof(r)); |
| 96 | +#endif |
| 97 | + r.thr = *opal_thread_get_self(); |
| 98 | + return (unsigned long)r.id; |
| 99 | +} |
| 100 | + |
| 101 | +static void * |
| 102 | +evthread_opal_cond_alloc(unsigned condflags) |
| 103 | +{ |
| 104 | + opal_cond_t *cond = malloc(sizeof(opal_cond_t)); |
| 105 | + if (!cond) |
| 106 | + return NULL; |
| 107 | + if (opal_cond_init(cond)) { |
| 108 | + free(cond); |
| 109 | + return NULL; |
| 110 | + } |
| 111 | + return cond; |
| 112 | +} |
| 113 | + |
| 114 | +static void |
| 115 | +evthread_opal_cond_free(void *cond_) |
| 116 | +{ |
| 117 | + opal_cond_t *cond = cond_; |
| 118 | + opal_cond_destroy(cond); |
| 119 | + free(cond); |
| 120 | +} |
| 121 | + |
| 122 | +static int |
| 123 | +evthread_opal_cond_signal(void *cond_, int broadcast) |
| 124 | +{ |
| 125 | + opal_cond_t *cond = cond_; |
| 126 | + int r; |
| 127 | + if (broadcast) |
| 128 | + r = opal_cond_broadcast(cond); |
| 129 | + else |
| 130 | + r = opal_cond_signal(cond); |
| 131 | + return r ? -1 : 0; |
| 132 | +} |
| 133 | + |
| 134 | +static int |
| 135 | +evthread_opal_cond_wait(void *cond_, void *lock_, const struct timeval *tv) |
| 136 | +{ |
| 137 | + int r; |
| 138 | + opal_condition_t *cond = cond_; |
| 139 | + opal_mutex_t *lock = lock_; |
| 140 | + |
| 141 | + if (tv) { |
| 142 | + struct timeval now, abstime; |
| 143 | + struct timespec ts; |
| 144 | + evutil_gettimeofday(&now, NULL); |
| 145 | + evutil_timeradd(&now, tv, &abstime); |
| 146 | + ts.tv_sec = abstime.tv_sec; |
| 147 | + ts.tv_nsec = abstime.tv_usec*1000; |
| 148 | + r = opal_condition_timedwait(cond, lock, &ts); |
| 149 | + if (r == ETIMEDOUT) |
| 150 | + return 1; |
| 151 | + else if (r) |
| 152 | + return -1; |
| 153 | + else |
| 154 | + return 0; |
| 155 | + } else { |
| 156 | + r = opal_cond_wait(cond, lock); |
| 157 | + return r ? -1 : 0; |
| 158 | + } |
| 159 | +} |
| 160 | + |
| 161 | +int |
| 162 | +opal_event_use_threads(void) |
| 163 | +{ |
| 164 | + struct evthread_lock_callbacks cbs = { |
| 165 | + EVTHREAD_LOCK_API_VERSION, |
| 166 | + EVTHREAD_LOCKTYPE_RECURSIVE, |
| 167 | + evthread_opal_lock_alloc, |
| 168 | + evthread_opal_lock_free, |
| 169 | + evthread_opal_lock, |
| 170 | + evthread_opal_unlock |
| 171 | + }; |
| 172 | + struct evthread_condition_callbacks cond_cbs = { |
| 173 | + EVTHREAD_CONDITION_API_VERSION, |
| 174 | + evthread_opal_cond_alloc, |
| 175 | + evthread_opal_cond_free, |
| 176 | + evthread_opal_cond_signal, |
| 177 | + evthread_opal_cond_wait |
| 178 | + }; |
| 179 | + |
| 180 | + |
| 181 | + evthread_set_lock_callbacks(&cbs); |
| 182 | + evthread_set_condition_callbacks(&cond_cbs); |
| 183 | + evthread_set_id_callback(evthread_opal_get_id); |
| 184 | + return 0; |
| 185 | +} |
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