1 /* crypto/async/async.c */
3 * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
5 /* ====================================================================
6 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
54 #include <openssl/crypto.h>
55 #include <openssl/async.h>
57 #include "async_locl.h"
59 #define ASYNC_JOB_RUNNING 0
60 #define ASYNC_JOB_PAUSING 1
61 #define ASYNC_JOB_PAUSED 2
62 #define ASYNC_JOB_STOPPING 3
65 static ASYNC_CTX *ASYNC_CTX_new(void)
67 ASYNC_CTX *nctx = NULL;
69 if(!(nctx = OPENSSL_malloc(sizeof (ASYNC_CTX)))) {
74 ASYNC_FIBRE_init_dispatcher(&nctx->dispatcher);
87 static int ASYNC_CTX_free(void)
90 OPENSSL_free(ASYNC_get_ctx());
98 static ASYNC_JOB *ASYNC_JOB_new(void)
100 ASYNC_JOB *job = NULL;
102 if(!(job = OPENSSL_malloc(sizeof (ASYNC_JOB)))) {
106 job->status = ASYNC_JOB_RUNNING;
107 job->funcargs = NULL;
112 static void ASYNC_JOB_free(ASYNC_JOB *job)
116 OPENSSL_free(job->funcargs);
117 ASYNC_FIBRE_free(&job->fibrectx);
122 void ASYNC_start_func(void)
127 job = ASYNC_get_ctx()->currjob;
128 job->ret = job->func(job->funcargs);
131 job->status = ASYNC_JOB_STOPPING;
132 if(!ASYNC_FIBRE_swapcontext(&job->fibrectx,
133 &ASYNC_get_ctx()->dispatcher, 0)) {
135 * Should not happen. Getting here will close the thread...can't do much
141 int ASYNC_start_job(ASYNC_JOB **job, int *ret, int (*func)(void *),
142 void *args, size_t size)
144 if(ASYNC_get_ctx() || !ASYNC_CTX_new()) {
149 ASYNC_get_ctx()->currjob = *job;
153 if(ASYNC_get_ctx()->currjob) {
154 if(ASYNC_get_ctx()->currjob->status == ASYNC_JOB_STOPPING) {
155 *ret = ASYNC_get_ctx()->currjob->ret;
156 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
157 ASYNC_get_ctx()->currjob = NULL;
162 if(ASYNC_get_ctx()->currjob->status == ASYNC_JOB_PAUSING) {
163 *job = ASYNC_get_ctx()->currjob;
164 ASYNC_get_ctx()->currjob->status = ASYNC_JOB_PAUSED;
169 if(ASYNC_get_ctx()->currjob->status == ASYNC_JOB_PAUSED) {
170 ASYNC_get_ctx()->currjob = *job;
171 /* Resume previous job */
172 if(!ASYNC_FIBRE_swapcontext(&ASYNC_get_ctx()->dispatcher,
173 &ASYNC_get_ctx()->currjob->fibrectx, 1))
178 /* Should not happen */
179 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
180 ASYNC_get_ctx()->currjob = NULL;
185 /* Start a new job */
186 if(!(ASYNC_get_ctx()->currjob = ASYNC_JOB_new())) {
192 ASYNC_get_ctx()->currjob->funcargs = OPENSSL_malloc(size);
193 if(!ASYNC_get_ctx()->currjob->funcargs) {
194 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
195 ASYNC_get_ctx()->currjob = NULL;
199 memcpy(ASYNC_get_ctx()->currjob->funcargs, args, size);
201 ASYNC_get_ctx()->currjob->funcargs = NULL;
204 ASYNC_get_ctx()->currjob->func = func;
205 ASYNC_FIBRE_makecontext(&ASYNC_get_ctx()->currjob->fibrectx);
206 if(!ASYNC_FIBRE_swapcontext(&ASYNC_get_ctx()->dispatcher,
207 &ASYNC_get_ctx()->currjob->fibrectx, 1))
212 ASYNC_JOB_free(ASYNC_get_ctx()->currjob);
213 ASYNC_get_ctx()->currjob = NULL;
219 int ASYNC_pause_job(void)
223 if(!ASYNC_get_ctx() || !ASYNC_get_ctx()->currjob)
226 job = ASYNC_get_ctx()->currjob;
227 job->status = ASYNC_JOB_PAUSING;
229 if(!ASYNC_FIBRE_swapcontext(&job->fibrectx,
230 &ASYNC_get_ctx()->dispatcher, 1)) {
238 int ASYNC_in_job(void)
246 int ASYNC_job_is_waiting(ASYNC_JOB *job)
248 return job->status == ASYNC_JOB_PAUSED;