2 * Written by Matt Caswell (matt@openssl.org) for the OpenSSL project.
4 /* ====================================================================
5 * Copyright (c) 2015 The OpenSSL Project. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
19 * 3. All advertising materials mentioning features or use of this
20 * software must display the following acknowledgment:
21 * "This product includes software developed by the OpenSSL Project
22 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
25 * endorse or promote products derived from this software without
26 * prior written permission. For written permission, please contact
27 * licensing@OpenSSL.org.
29 * 5. Products derived from this software may not be called "OpenSSL"
30 * nor may "OpenSSL" appear in their names without prior written
31 * permission of the OpenSSL Project.
33 * 6. Redistributions of any form whatsoever must retain the following
35 * "This product includes software developed by the OpenSSL Project
36 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
39 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
40 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
41 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
42 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
44 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
45 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
46 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
47 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
48 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
49 * OF THE POSSIBILITY OF SUCH DAMAGE.
50 * ====================================================================
54 * Without this we start getting longjmp crashes because it thinks we're jumping
55 * up the stack when in fact we are jumping to an entirely different stack. The
56 * cost of this is not having certain buffer overrun/underrun checks etc for
57 * this source file :-(
59 #undef _FORTIFY_SOURCE
61 /* This must be the first #include file */
62 #include "async_locl.h"
64 #include <openssl/err.h>
65 #include <internal/cryptlib_int.h>
68 #define ASYNC_JOB_RUNNING 0
69 #define ASYNC_JOB_PAUSING 1
70 #define ASYNC_JOB_PAUSED 2
71 #define ASYNC_JOB_STOPPING 3
73 static CRYPTO_THREAD_LOCAL ctxkey;
74 static CRYPTO_THREAD_LOCAL poolkey;
76 static void async_free_pool_internal(async_pool *pool);
78 static async_ctx *async_ctx_new(void)
80 async_ctx *nctx = NULL;
82 nctx = OPENSSL_malloc(sizeof (async_ctx));
84 ASYNCerr(ASYNC_F_ASYNC_CTX_NEW, ERR_R_MALLOC_FAILURE);
88 async_fibre_init_dispatcher(&nctx->dispatcher);
91 if (!CRYPTO_THREAD_set_local(&ctxkey, nctx))
101 async_ctx *async_get_ctx(void)
103 if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
106 return (async_ctx *)CRYPTO_THREAD_get_local(&ctxkey);
109 static int async_ctx_free(void)
113 ctx = async_get_ctx();
115 if (!CRYPTO_THREAD_set_local(&ctxkey, NULL))
123 static ASYNC_JOB *async_job_new(void)
125 ASYNC_JOB *job = NULL;
127 job = OPENSSL_zalloc(sizeof (ASYNC_JOB));
129 ASYNCerr(ASYNC_F_ASYNC_JOB_NEW, ERR_R_MALLOC_FAILURE);
133 job->status = ASYNC_JOB_RUNNING;
138 static void async_job_free(ASYNC_JOB *job)
141 OPENSSL_free(job->funcargs);
142 async_fibre_free(&job->fibrectx);
147 static ASYNC_JOB *async_get_pool_job(void) {
151 pool = (async_pool *)CRYPTO_THREAD_get_local(&poolkey);
154 * Pool has not been initialised, so init with the defaults, i.e.
155 * no max size and no pre-created jobs
157 if (ASYNC_init_thread(0, 0) == 0)
159 pool = (async_pool *)CRYPTO_THREAD_get_local(&poolkey);
162 job = sk_ASYNC_JOB_pop(pool->jobs);
165 if ((pool->max_size != 0) && (pool->curr_size >= pool->max_size))
168 job = async_job_new();
170 if (! async_fibre_makecontext(&job->fibrectx)) {
180 static void async_release_job(ASYNC_JOB *job) {
183 pool = (async_pool *)CRYPTO_THREAD_get_local(&poolkey);
184 OPENSSL_free(job->funcargs);
185 job->funcargs = NULL;
186 sk_ASYNC_JOB_push(pool->jobs, job);
189 void async_start_func(void)
192 async_ctx *ctx = async_get_ctx();
197 job->ret = job->func(job->funcargs);
200 job->status = ASYNC_JOB_STOPPING;
201 if (!async_fibre_swapcontext(&job->fibrectx,
202 &ctx->dispatcher, 1)) {
204 * Should not happen. Getting here will close the thread...can't do
207 ASYNCerr(ASYNC_F_ASYNC_START_FUNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
212 int ASYNC_start_job(ASYNC_JOB **job, ASYNC_WAIT_CTX *wctx, int *ret,
213 int (*func)(void *), void *args, size_t size)
215 async_ctx *ctx = async_get_ctx();
217 ctx = async_ctx_new();
227 if (ctx->currjob != NULL) {
228 if (ctx->currjob->status == ASYNC_JOB_STOPPING) {
229 *ret = ctx->currjob->ret;
230 ctx->currjob->waitctx = NULL;
231 async_release_job(ctx->currjob);
237 if (ctx->currjob->status == ASYNC_JOB_PAUSING) {
239 ctx->currjob->status = ASYNC_JOB_PAUSED;
244 if (ctx->currjob->status == ASYNC_JOB_PAUSED) {
246 /* Resume previous job */
247 if (!async_fibre_swapcontext(&ctx->dispatcher,
248 &ctx->currjob->fibrectx, 1)) {
249 ASYNCerr(ASYNC_F_ASYNC_START_JOB,
250 ASYNC_R_FAILED_TO_SWAP_CONTEXT);
256 /* Should not happen */
257 ASYNCerr(ASYNC_F_ASYNC_START_JOB, ERR_R_INTERNAL_ERROR);
258 async_release_job(ctx->currjob);
264 /* Start a new job */
265 if ((ctx->currjob = async_get_pool_job()) == NULL) {
266 return ASYNC_NO_JOBS;
270 ctx->currjob->funcargs = OPENSSL_malloc(size);
271 if (ctx->currjob->funcargs == NULL) {
272 ASYNCerr(ASYNC_F_ASYNC_START_JOB, ERR_R_MALLOC_FAILURE);
273 async_release_job(ctx->currjob);
277 memcpy(ctx->currjob->funcargs, args, size);
279 ctx->currjob->funcargs = NULL;
282 ctx->currjob->func = func;
283 ctx->currjob->waitctx = wctx;
284 if (!async_fibre_swapcontext(&ctx->dispatcher,
285 &ctx->currjob->fibrectx, 1)) {
286 ASYNCerr(ASYNC_F_ASYNC_START_JOB, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
292 async_release_job(ctx->currjob);
298 int ASYNC_pause_job(void)
301 async_ctx *ctx = async_get_ctx();
304 || ctx->currjob == NULL
307 * Could be we've deliberately not been started within a job so this is
308 * counted as success.
314 job->status = ASYNC_JOB_PAUSING;
316 if (!async_fibre_swapcontext(&job->fibrectx,
317 &ctx->dispatcher, 1)) {
318 ASYNCerr(ASYNC_F_ASYNC_PAUSE_JOB, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
321 /* Reset counts of added and deleted fds */
322 async_wait_ctx_reset_counts(job->waitctx);
327 static void async_empty_pool(async_pool *pool)
331 if (!pool || !pool->jobs)
335 job = sk_ASYNC_JOB_pop(pool->jobs);
342 if (!CRYPTO_THREAD_init_local(&ctxkey, NULL))
345 if (!CRYPTO_THREAD_init_local(&poolkey, NULL)) {
346 CRYPTO_THREAD_cleanup_local(&ctxkey);
353 void async_deinit(void)
355 CRYPTO_THREAD_cleanup_local(&ctxkey);
356 CRYPTO_THREAD_cleanup_local(&poolkey);
359 int ASYNC_init_thread(size_t max_size, size_t init_size)
362 size_t curr_size = 0;
364 if (init_size > max_size) {
365 ASYNCerr(ASYNC_F_ASYNC_INIT_THREAD, ASYNC_R_INVALID_POOL_SIZE);
369 if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL)) {
372 if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_ASYNC)) {
376 pool = OPENSSL_zalloc(sizeof *pool);
378 ASYNCerr(ASYNC_F_ASYNC_INIT_THREAD, ERR_R_MALLOC_FAILURE);
382 pool->jobs = sk_ASYNC_JOB_new_null();
383 if (pool->jobs == NULL) {
384 ASYNCerr(ASYNC_F_ASYNC_INIT_THREAD, ERR_R_MALLOC_FAILURE);
389 pool->max_size = max_size;
391 /* Pre-create jobs as required */
392 while (init_size--) {
394 job = async_job_new();
395 if (job == NULL || !async_fibre_makecontext(&job->fibrectx)) {
397 * Not actually fatal because we already created the pool, just
398 * skip creation of any more jobs
403 job->funcargs = NULL;
404 sk_ASYNC_JOB_push(pool->jobs, job);
407 pool->curr_size = curr_size;
408 if (!CRYPTO_THREAD_set_local(&poolkey, pool)) {
409 ASYNCerr(ASYNC_F_ASYNC_INIT_THREAD, ASYNC_R_FAILED_TO_SET_POOL);
415 async_free_pool_internal(pool);
419 static void async_free_pool_internal(async_pool *pool)
424 async_empty_pool(pool);
425 sk_ASYNC_JOB_free(pool->jobs);
427 CRYPTO_THREAD_set_local(&poolkey, NULL);
428 async_local_cleanup();
432 void ASYNC_cleanup_thread(void)
434 async_free_pool_internal((async_pool *)CRYPTO_THREAD_get_local(&poolkey));
437 ASYNC_JOB *ASYNC_get_current_job(void)
441 ctx = async_get_ctx();
448 ASYNC_WAIT_CTX *ASYNC_get_wait_ctx(ASYNC_JOB *job)
453 void ASYNC_block_pause(void)
455 async_ctx *ctx = async_get_ctx();
456 if (ctx == NULL || ctx->currjob == NULL) {
458 * We're not in a job anyway so ignore this
465 void ASYNC_unblock_pause(void)
467 async_ctx *ctx = async_get_ctx();
468 if (ctx == NULL || ctx->currjob == NULL) {
470 * We're not in a job anyway so ignore this