Xuyi Wang / wolfSSL

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wolfcrypt/src/wolfevent.c@15:117db924cf7c, 2018-08-18 (annotated)

Committer:
wolfSSL
Date:
Sat Aug 18 22:20:43 2018 +0000
Revision:
15:117db924cf7c
wolfSSL 3.15.3

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wolfSSL 15:117db924cf7c 1 /* wolfevent.c
wolfSSL 15:117db924cf7c 2 *
wolfSSL 15:117db924cf7c 3 * Copyright (C) 2006-2017 wolfSSL Inc.
wolfSSL 15:117db924cf7c 4 *
wolfSSL 15:117db924cf7c 5 * This file is part of wolfSSL.
wolfSSL 15:117db924cf7c 6 *
wolfSSL 15:117db924cf7c 7 * wolfSSL is free software; you can redistribute it and/or modify
wolfSSL 15:117db924cf7c 8 * it under the terms of the GNU General Public License as published by
wolfSSL 15:117db924cf7c 9 * the Free Software Foundation; either version 2 of the License, or
wolfSSL 15:117db924cf7c 10 * (at your option) any later version.
wolfSSL 15:117db924cf7c 11 *
wolfSSL 15:117db924cf7c 12 * wolfSSL is distributed in the hope that it will be useful,
wolfSSL 15:117db924cf7c 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
wolfSSL 15:117db924cf7c 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wolfSSL 15:117db924cf7c 15 * GNU General Public License for more details.
wolfSSL 15:117db924cf7c 16 *
wolfSSL 15:117db924cf7c 17 * You should have received a copy of the GNU General Public License
wolfSSL 15:117db924cf7c 18 * along with this program; if not, write to the Free Software
wolfSSL 15:117db924cf7c 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
wolfSSL 15:117db924cf7c 20 */
wolfSSL 15:117db924cf7c 21
wolfSSL 15:117db924cf7c 22 #ifdef HAVE_CONFIG_H
wolfSSL 15:117db924cf7c 23 #include <config.h>
wolfSSL 15:117db924cf7c 24 #endif
wolfSSL 15:117db924cf7c 25
wolfSSL 15:117db924cf7c 26 #include <wolfssl/wolfcrypt/settings.h>
wolfSSL 15:117db924cf7c 27
wolfSSL 15:117db924cf7c 28
wolfSSL 15:117db924cf7c 29 #ifdef HAVE_WOLF_EVENT
wolfSSL 15:117db924cf7c 30
wolfSSL 15:117db924cf7c 31 #include <wolfssl/internal.h>
wolfSSL 15:117db924cf7c 32 #include <wolfssl/error-ssl.h>
wolfSSL 15:117db924cf7c 33 #include <wolfssl/wolfcrypt/error-crypt.h>
wolfSSL 15:117db924cf7c 34
wolfSSL 15:117db924cf7c 35 #include <wolfssl/wolfcrypt/wolfevent.h>
wolfSSL 15:117db924cf7c 36
wolfSSL 15:117db924cf7c 37
wolfSSL 15:117db924cf7c 38 int wolfEvent_Init(WOLF_EVENT* event, WOLF_EVENT_TYPE type, void* context)
wolfSSL 15:117db924cf7c 39 {
wolfSSL 15:117db924cf7c 40 if (event == NULL) {
wolfSSL 15:117db924cf7c 41 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 42 }
wolfSSL 15:117db924cf7c 43
wolfSSL 15:117db924cf7c 44 if (event->state == WOLF_EVENT_STATE_PENDING) {
wolfSSL 15:117db924cf7c 45 WOLFSSL_MSG("Event already pending!");
wolfSSL 15:117db924cf7c 46 return BAD_COND_E;
wolfSSL 15:117db924cf7c 47 }
wolfSSL 15:117db924cf7c 48
wolfSSL 15:117db924cf7c 49 XMEMSET(event, 0, sizeof(WOLF_EVENT));
wolfSSL 15:117db924cf7c 50 event->type = type;
wolfSSL 15:117db924cf7c 51 event->context = context;
wolfSSL 15:117db924cf7c 52
wolfSSL 15:117db924cf7c 53 return 0;
wolfSSL 15:117db924cf7c 54 }
wolfSSL 15:117db924cf7c 55
wolfSSL 15:117db924cf7c 56 int wolfEvent_Poll(WOLF_EVENT* event, WOLF_EVENT_FLAG flags)
wolfSSL 15:117db924cf7c 57 {
wolfSSL 15:117db924cf7c 58 int ret = BAD_COND_E;
wolfSSL 15:117db924cf7c 59
wolfSSL 15:117db924cf7c 60 /* Check hardware */
wolfSSL 15:117db924cf7c 61 #ifdef WOLFSSL_ASYNC_CRYPT
wolfSSL 15:117db924cf7c 62 if (event->type >= WOLF_EVENT_TYPE_ASYNC_FIRST &&
wolfSSL 15:117db924cf7c 63 event->type <= WOLF_EVENT_TYPE_ASYNC_LAST)
wolfSSL 15:117db924cf7c 64 {
wolfSSL 15:117db924cf7c 65 ret = wolfAsync_EventPoll(event, flags);
wolfSSL 15:117db924cf7c 66 }
wolfSSL 15:117db924cf7c 67 #endif /* WOLFSSL_ASYNC_CRYPT */
wolfSSL 15:117db924cf7c 68
wolfSSL 15:117db924cf7c 69 return ret;
wolfSSL 15:117db924cf7c 70 }
wolfSSL 15:117db924cf7c 71
wolfSSL 15:117db924cf7c 72 int wolfEventQueue_Init(WOLF_EVENT_QUEUE* queue)
wolfSSL 15:117db924cf7c 73 {
wolfSSL 15:117db924cf7c 74 int ret = 0;
wolfSSL 15:117db924cf7c 75
wolfSSL 15:117db924cf7c 76 if (queue == NULL) {
wolfSSL 15:117db924cf7c 77 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 78 }
wolfSSL 15:117db924cf7c 79
wolfSSL 15:117db924cf7c 80 XMEMSET(queue, 0, sizeof(WOLF_EVENT_QUEUE));
wolfSSL 15:117db924cf7c 81 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 82 ret = wc_InitMutex(&queue->lock);
wolfSSL 15:117db924cf7c 83 #endif
wolfSSL 15:117db924cf7c 84 return ret;
wolfSSL 15:117db924cf7c 85 }
wolfSSL 15:117db924cf7c 86
wolfSSL 15:117db924cf7c 87
wolfSSL 15:117db924cf7c 88 int wolfEventQueue_Push(WOLF_EVENT_QUEUE* queue, WOLF_EVENT* event)
wolfSSL 15:117db924cf7c 89 {
wolfSSL 15:117db924cf7c 90 int ret;
wolfSSL 15:117db924cf7c 91
wolfSSL 15:117db924cf7c 92 if (queue == NULL || event == NULL) {
wolfSSL 15:117db924cf7c 93 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 94 }
wolfSSL 15:117db924cf7c 95
wolfSSL 15:117db924cf7c 96 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 97 if ((ret = wc_LockMutex(&queue->lock)) != 0) {
wolfSSL 15:117db924cf7c 98 return ret;
wolfSSL 15:117db924cf7c 99 }
wolfSSL 15:117db924cf7c 100 #endif
wolfSSL 15:117db924cf7c 101
wolfSSL 15:117db924cf7c 102 ret = wolfEventQueue_Add(queue, event);
wolfSSL 15:117db924cf7c 103
wolfSSL 15:117db924cf7c 104 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 105 wc_UnLockMutex(&queue->lock);
wolfSSL 15:117db924cf7c 106 #endif
wolfSSL 15:117db924cf7c 107
wolfSSL 15:117db924cf7c 108 return ret;
wolfSSL 15:117db924cf7c 109 }
wolfSSL 15:117db924cf7c 110
wolfSSL 15:117db924cf7c 111 int wolfEventQueue_Pop(WOLF_EVENT_QUEUE* queue, WOLF_EVENT** event)
wolfSSL 15:117db924cf7c 112 {
wolfSSL 15:117db924cf7c 113 int ret = 0;
wolfSSL 15:117db924cf7c 114
wolfSSL 15:117db924cf7c 115 if (queue == NULL || event == NULL) {
wolfSSL 15:117db924cf7c 116 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 117 }
wolfSSL 15:117db924cf7c 118
wolfSSL 15:117db924cf7c 119 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 120 /* In single threaded mode "event_queue.lock" doesn't exist */
wolfSSL 15:117db924cf7c 121 if ((ret = wc_LockMutex(&queue->lock)) != 0) {
wolfSSL 15:117db924cf7c 122 return ret;
wolfSSL 15:117db924cf7c 123 }
wolfSSL 15:117db924cf7c 124 #endif
wolfSSL 15:117db924cf7c 125
wolfSSL 15:117db924cf7c 126 /* Pop first item off queue */
wolfSSL 15:117db924cf7c 127 *event = queue->head;
wolfSSL 15:117db924cf7c 128 ret = wolfEventQueue_Remove(queue, *event);
wolfSSL 15:117db924cf7c 129
wolfSSL 15:117db924cf7c 130 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 131 wc_UnLockMutex(&queue->lock);
wolfSSL 15:117db924cf7c 132 #endif
wolfSSL 15:117db924cf7c 133
wolfSSL 15:117db924cf7c 134 return ret;
wolfSSL 15:117db924cf7c 135 }
wolfSSL 15:117db924cf7c 136
wolfSSL 15:117db924cf7c 137 /* assumes queue is locked by caller */
wolfSSL 15:117db924cf7c 138 int wolfEventQueue_Add(WOLF_EVENT_QUEUE* queue, WOLF_EVENT* event)
wolfSSL 15:117db924cf7c 139 {
wolfSSL 15:117db924cf7c 140 if (queue == NULL || event == NULL) {
wolfSSL 15:117db924cf7c 141 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 142 }
wolfSSL 15:117db924cf7c 143
wolfSSL 15:117db924cf7c 144 event->next = NULL; /* added to end */
wolfSSL 15:117db924cf7c 145 event->prev = NULL;
wolfSSL 15:117db924cf7c 146 if (queue->tail == NULL) {
wolfSSL 15:117db924cf7c 147 queue->head = event;
wolfSSL 15:117db924cf7c 148 }
wolfSSL 15:117db924cf7c 149 else {
wolfSSL 15:117db924cf7c 150 queue->tail->next = event;
wolfSSL 15:117db924cf7c 151 event->prev = queue->tail;
wolfSSL 15:117db924cf7c 152 }
wolfSSL 15:117db924cf7c 153 queue->tail = event; /* add to the end either way */
wolfSSL 15:117db924cf7c 154 queue->count++;
wolfSSL 15:117db924cf7c 155
wolfSSL 15:117db924cf7c 156 return 0;
wolfSSL 15:117db924cf7c 157 }
wolfSSL 15:117db924cf7c 158
wolfSSL 15:117db924cf7c 159 /* assumes queue is locked by caller */
wolfSSL 15:117db924cf7c 160 int wolfEventQueue_Remove(WOLF_EVENT_QUEUE* queue, WOLF_EVENT* event)
wolfSSL 15:117db924cf7c 161 {
wolfSSL 15:117db924cf7c 162 int ret = 0;
wolfSSL 15:117db924cf7c 163
wolfSSL 15:117db924cf7c 164 if (queue == NULL || event == NULL) {
wolfSSL 15:117db924cf7c 165 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 166 }
wolfSSL 15:117db924cf7c 167
wolfSSL 15:117db924cf7c 168 if (event == queue->head && event == queue->tail) {
wolfSSL 15:117db924cf7c 169 queue->head = NULL;
wolfSSL 15:117db924cf7c 170 queue->tail = NULL;
wolfSSL 15:117db924cf7c 171 }
wolfSSL 15:117db924cf7c 172 else if (event == queue->head) {
wolfSSL 15:117db924cf7c 173 queue->head = event->next;
wolfSSL 15:117db924cf7c 174 queue->head->prev = NULL;
wolfSSL 15:117db924cf7c 175 }
wolfSSL 15:117db924cf7c 176 else if (event == queue->tail) {
wolfSSL 15:117db924cf7c 177 queue->tail = event->prev;
wolfSSL 15:117db924cf7c 178 queue->tail->next = NULL;
wolfSSL 15:117db924cf7c 179 }
wolfSSL 15:117db924cf7c 180 else {
wolfSSL 15:117db924cf7c 181 WOLF_EVENT* next = event->next;
wolfSSL 15:117db924cf7c 182 WOLF_EVENT* prev = event->prev;
wolfSSL 15:117db924cf7c 183 next->prev = prev;
wolfSSL 15:117db924cf7c 184 prev->next = next;
wolfSSL 15:117db924cf7c 185 }
wolfSSL 15:117db924cf7c 186 queue->count--;
wolfSSL 15:117db924cf7c 187
wolfSSL 15:117db924cf7c 188 return ret;
wolfSSL 15:117db924cf7c 189 }
wolfSSL 15:117db924cf7c 190
wolfSSL 15:117db924cf7c 191 int wolfEventQueue_Poll(WOLF_EVENT_QUEUE* queue, void* context_filter,
wolfSSL 15:117db924cf7c 192 WOLF_EVENT** events, int maxEvents, WOLF_EVENT_FLAG flags, int* eventCount)
wolfSSL 15:117db924cf7c 193 {
wolfSSL 15:117db924cf7c 194 WOLF_EVENT* event;
wolfSSL 15:117db924cf7c 195 int ret = 0, count = 0;
wolfSSL 15:117db924cf7c 196
wolfSSL 15:117db924cf7c 197 if (queue == NULL) {
wolfSSL 15:117db924cf7c 198 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 199 }
wolfSSL 15:117db924cf7c 200
wolfSSL 15:117db924cf7c 201 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 202 /* In single threaded mode "event_queue.lock" doesn't exist */
wolfSSL 15:117db924cf7c 203 if ((ret = wc_LockMutex(&queue->lock)) != 0) {
wolfSSL 15:117db924cf7c 204 return ret;
wolfSSL 15:117db924cf7c 205 }
wolfSSL 15:117db924cf7c 206 #endif
wolfSSL 15:117db924cf7c 207
wolfSSL 15:117db924cf7c 208 /* itterate event queue */
wolfSSL 15:117db924cf7c 209 for (event = queue->head; event != NULL; event = event->next)
wolfSSL 15:117db924cf7c 210 {
wolfSSL 15:117db924cf7c 211 /* optional filter based on context */
wolfSSL 15:117db924cf7c 212 if (context_filter == NULL || event->context == context_filter) {
wolfSSL 15:117db924cf7c 213
wolfSSL 15:117db924cf7c 214 /* poll event */
wolfSSL 15:117db924cf7c 215 ret = wolfEvent_Poll(event, flags);
wolfSSL 15:117db924cf7c 216 if (ret < 0) break; /* exit for */
wolfSSL 15:117db924cf7c 217
wolfSSL 15:117db924cf7c 218 /* If event is done then process */
wolfSSL 15:117db924cf7c 219 if (event->state == WOLF_EVENT_STATE_DONE) {
wolfSSL 15:117db924cf7c 220 /* remove from queue */
wolfSSL 15:117db924cf7c 221 ret = wolfEventQueue_Remove(queue, event);
wolfSSL 15:117db924cf7c 222 if (ret < 0) break; /* exit for */
wolfSSL 15:117db924cf7c 223
wolfSSL 15:117db924cf7c 224 /* return pointer in 'events' arg */
wolfSSL 15:117db924cf7c 225 if (events) {
wolfSSL 15:117db924cf7c 226 events[count] = event; /* return pointer */
wolfSSL 15:117db924cf7c 227 }
wolfSSL 15:117db924cf7c 228 count++;
wolfSSL 15:117db924cf7c 229
wolfSSL 15:117db924cf7c 230 /* check to make sure our event list isn't full */
wolfSSL 15:117db924cf7c 231 if (events && count >= maxEvents) {
wolfSSL 15:117db924cf7c 232 break; /* exit for */
wolfSSL 15:117db924cf7c 233 }
wolfSSL 15:117db924cf7c 234 }
wolfSSL 15:117db924cf7c 235 }
wolfSSL 15:117db924cf7c 236 }
wolfSSL 15:117db924cf7c 237
wolfSSL 15:117db924cf7c 238 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 239 wc_UnLockMutex(&queue->lock);
wolfSSL 15:117db924cf7c 240 #endif
wolfSSL 15:117db924cf7c 241
wolfSSL 15:117db924cf7c 242 /* return number of properly populated events */
wolfSSL 15:117db924cf7c 243 if (eventCount) {
wolfSSL 15:117db924cf7c 244 *eventCount = count;
wolfSSL 15:117db924cf7c 245 }
wolfSSL 15:117db924cf7c 246
wolfSSL 15:117db924cf7c 247 return ret;
wolfSSL 15:117db924cf7c 248 }
wolfSSL 15:117db924cf7c 249
wolfSSL 15:117db924cf7c 250 int wolfEventQueue_Count(WOLF_EVENT_QUEUE* queue)
wolfSSL 15:117db924cf7c 251 {
wolfSSL 15:117db924cf7c 252 int ret;
wolfSSL 15:117db924cf7c 253
wolfSSL 15:117db924cf7c 254 if (queue == NULL) {
wolfSSL 15:117db924cf7c 255 return BAD_FUNC_ARG;
wolfSSL 15:117db924cf7c 256 }
wolfSSL 15:117db924cf7c 257
wolfSSL 15:117db924cf7c 258 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 259 /* In single threaded mode "event_queue.lock" doesn't exist */
wolfSSL 15:117db924cf7c 260 if ((ret = wc_LockMutex(&queue->lock)) != 0) {
wolfSSL 15:117db924cf7c 261 return ret;
wolfSSL 15:117db924cf7c 262 }
wolfSSL 15:117db924cf7c 263 #endif
wolfSSL 15:117db924cf7c 264
wolfSSL 15:117db924cf7c 265 ret = queue->count;
wolfSSL 15:117db924cf7c 266
wolfSSL 15:117db924cf7c 267 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 268 wc_UnLockMutex(&queue->lock);
wolfSSL 15:117db924cf7c 269 #endif
wolfSSL 15:117db924cf7c 270
wolfSSL 15:117db924cf7c 271 return ret;
wolfSSL 15:117db924cf7c 272 }
wolfSSL 15:117db924cf7c 273
wolfSSL 15:117db924cf7c 274 void wolfEventQueue_Free(WOLF_EVENT_QUEUE* queue)
wolfSSL 15:117db924cf7c 275 {
wolfSSL 15:117db924cf7c 276 if (queue) {
wolfSSL 15:117db924cf7c 277 #ifndef SINGLE_THREADED
wolfSSL 15:117db924cf7c 278 wc_FreeMutex(&queue->lock);
wolfSSL 15:117db924cf7c 279 #endif
wolfSSL 15:117db924cf7c 280 }
wolfSSL 15:117db924cf7c 281 }
wolfSSL 15:117db924cf7c 282
wolfSSL 15:117db924cf7c 283 #endif /* HAVE_WOLF_EVENT */
wolfSSL 15:117db924cf7c 284