/src/openssl/crypto/async/async.c

Source (jump to first uncovered line)
/*
 * Copyright 2015-2022 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

/*
 * Without this we start getting longjmp crashes because it thinks we're jumping
 * up the stack when in fact we are jumping to an entirely different stack. The
 * cost of this is not having certain buffer overrun/underrun checks etc for
 * this source file :-(
 */
#undef _FORTIFY_SOURCE

/* This must be the first #include file */
#include "async_local.h"
#include "internal/threads_common.h"

#include <openssl/err.h>
#include "crypto/cryptlib.h"
#include <string.h>

#define ASYNC_JOB_RUNNING   0
#define ASYNC_JOB_PAUSING   1
#define ASYNC_JOB_PAUSED    2
#define ASYNC_JOB_STOPPING  3

static void async_delete_thread_state(void *arg);

static async_ctx *async_ctx_new(void)
{
    async_ctx *nctx;

    if (!ossl_init_thread_start(NULL, NULL, async_delete_thread_state))
        return NULL;

    nctx = OPENSSL_malloc(sizeof(*nctx));
    if (nctx == NULL)
        goto err;

    async_fibre_init_dispatcher(&nctx->dispatcher);
    nctx->currjob = NULL;
    nctx->blocked = 0;
    if (!CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_CTX_KEY,
                                    CRYPTO_THREAD_NO_CONTEXT, nctx))
        goto err;

    return nctx;
err:
    OPENSSL_free(nctx);

    return NULL;
}

async_ctx *async_get_ctx(void)
{
    return (async_ctx *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_CTX_KEY,
                                                   CRYPTO_THREAD_NO_CONTEXT);
}

static int async_ctx_free(void)
{
    async_ctx *ctx;

    ctx = async_get_ctx();

    if (!CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_CTX_KEY,
                                    CRYPTO_THREAD_NO_CONTEXT, NULL))
        return 0;

    OPENSSL_free(ctx);

    return 1;
}

static ASYNC_JOB *async_job_new(void)
{
    ASYNC_JOB *job = NULL;

    job = OPENSSL_zalloc(sizeof(*job));
    if (job == NULL)
        return NULL;

    job->status = ASYNC_JOB_RUNNING;

    return job;
}

static void async_job_free(ASYNC_JOB *job)
{
    if (job != NULL) {
        OPENSSL_free(job->funcargs);
        async_fibre_free(&job->fibrectx);
        OPENSSL_free(job);
    }
}

static ASYNC_JOB *async_get_pool_job(void) {
    ASYNC_JOB *job;
    async_pool *pool;

    pool = (async_pool *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
                                                    CRYPTO_THREAD_NO_CONTEXT);
    if (pool == NULL) {
        /*
         * Pool has not been initialised, so init with the defaults, i.e.
         * no max size and no pre-created jobs
         */
        if (ASYNC_init_thread(0, 0) == 0)
            return NULL;
        pool = (async_pool *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
                                                        CRYPTO_THREAD_NO_CONTEXT);
    }

    job = sk_ASYNC_JOB_pop(pool->jobs);
    if (job == NULL) {
        /* Pool is empty */
        if ((pool->max_size != 0) && (pool->curr_size >= pool->max_size))
            return NULL;

        job = async_job_new();
        if (job != NULL) {
            if (! async_fibre_makecontext(&job->fibrectx)) {
                async_job_free(job);
                return NULL;
            }
            pool->curr_size++;
        }
    }
    return job;
}

static void async_release_job(ASYNC_JOB *job) {
    async_pool *pool;

    pool = (async_pool *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
                                                    CRYPTO_THREAD_NO_CONTEXT);
    if (pool == NULL) {
        ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
        return;
    }
    OPENSSL_free(job->funcargs);
    job->funcargs = NULL;
    sk_ASYNC_JOB_push(pool->jobs, job);
}

void async_start_func(void)
{
    ASYNC_JOB *job;
    async_ctx *ctx = async_get_ctx();

    if (ctx == NULL) {
        ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
        return;
    }
    while (1) {
        /* Run the job */
        job = ctx->currjob;
        job->ret = job->func(job->funcargs);

        /* Stop the job */
        job->status = ASYNC_JOB_STOPPING;
        if (!async_fibre_swapcontext(&job->fibrectx,
                                     &ctx->dispatcher, 1)) {
            /*
             * Should not happen. Getting here will close the thread...can't do
             * much about it
             */
            ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
        }
    }
}

int ASYNC_start_job(ASYNC_JOB **job, ASYNC_WAIT_CTX *wctx, int *ret,
                    int (*func)(void *), void *args, size_t size)
{
    async_ctx *ctx;
    OSSL_LIB_CTX *libctx;

    if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
        return ASYNC_ERR;

    ctx = async_get_ctx();
    if (ctx == NULL)
        ctx = async_ctx_new();
    if (ctx == NULL)
        return ASYNC_ERR;

    if (*job != NULL)
        ctx->currjob = *job;

    for (;;) {
        if (ctx->currjob != NULL) {
            if (ctx->currjob->status == ASYNC_JOB_STOPPING) {
                *ret = ctx->currjob->ret;
                ctx->currjob->waitctx = NULL;
                async_release_job(ctx->currjob);
                ctx->currjob = NULL;
                *job = NULL;
                return ASYNC_FINISH;
            }

            if (ctx->currjob->status == ASYNC_JOB_PAUSING) {
                *job = ctx->currjob;
                ctx->currjob->status = ASYNC_JOB_PAUSED;
                ctx->currjob = NULL;
                return ASYNC_PAUSE;
            }

            if (ctx->currjob->status == ASYNC_JOB_PAUSED) {
                if (*job == NULL)
                    return ASYNC_ERR;
                ctx->currjob = *job;

                /*
                 * Restore the default libctx to what it was the last time the
                 * fibre ran
                 */
                libctx = OSSL_LIB_CTX_set0_default(ctx->currjob->libctx);
                if (libctx == NULL) {
                    /* Failed to set the default context */
                    ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
                    goto err;
                }
                /* Resume previous job */
                if (!async_fibre_swapcontext(&ctx->dispatcher,
                        &ctx->currjob->fibrectx, 1)) {
                    ctx->currjob->libctx = OSSL_LIB_CTX_set0_default(libctx);
                    ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
                    goto err;
                }
                /*
                 * In case the fibre changed the default libctx we set it back
                 * again to what it was originally, and remember what it had
                 * been changed to.
                 */
                ctx->currjob->libctx = OSSL_LIB_CTX_set0_default(libctx);
                continue;
            }

            /* Should not happen */
            ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
            async_release_job(ctx->currjob);
            ctx->currjob = NULL;
            *job = NULL;
            return ASYNC_ERR;
        }

        /* Start a new job */
        if ((ctx->currjob = async_get_pool_job()) == NULL)
            return ASYNC_NO_JOBS;

        if (args != NULL) {
            ctx->currjob->funcargs = OPENSSL_malloc(size);
            if (ctx->currjob->funcargs == NULL) {
                async_release_job(ctx->currjob);
                ctx->currjob = NULL;
                return ASYNC_ERR;
            }
            memcpy(ctx->currjob->funcargs, args, size);
        } else {
            ctx->currjob->funcargs = NULL;
        }

        ctx->currjob->func = func;
        ctx->currjob->waitctx = wctx;
        libctx = ossl_lib_ctx_get_concrete(NULL);
        if (!async_fibre_swapcontext(&ctx->dispatcher,
                &ctx->currjob->fibrectx, 1)) {
            ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
            goto err;
        }
        /*
         * In case the fibre changed the default libctx we set it back again
         * to what it was, and remember what it had been changed to.
         */
        ctx->currjob->libctx = OSSL_LIB_CTX_set0_default(libctx);
    }

err:
    async_release_job(ctx->currjob);
    ctx->currjob = NULL;
    *job = NULL;
    return ASYNC_ERR;
}

int ASYNC_pause_job(void)
{
    ASYNC_JOB *job;
    async_ctx *ctx = async_get_ctx();

    if (ctx == NULL
            || ctx->currjob == NULL
            || ctx->blocked) {
        /*
         * Could be we've deliberately not been started within a job so this is
         * counted as success.
         */
        return 1;
    }

    job = ctx->currjob;
    job->status = ASYNC_JOB_PAUSING;

    if (!async_fibre_swapcontext(&job->fibrectx,
                                 &ctx->dispatcher, 1)) {
        ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
        return 0;
    }
    /* Reset counts of added and deleted fds */
    async_wait_ctx_reset_counts(job->waitctx);

    return 1;
}

static void async_empty_pool(async_pool *pool)
{
    ASYNC_JOB *job;

    if (pool == NULL || pool->jobs == NULL)
        return;

    do {
        job = sk_ASYNC_JOB_pop(pool->jobs);
        async_job_free(job);
    } while (job);
}

int async_init(void)
{
    return async_local_init();
}

void async_deinit(void)
{
    async_local_deinit();
}

int ASYNC_init_thread(size_t max_size, size_t init_size)
{
    async_pool *pool;
    size_t curr_size = 0;

    if (init_size > max_size) {
        ERR_raise(ERR_LIB_ASYNC, ASYNC_R_INVALID_POOL_SIZE);
        return 0;
    }

    if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
        return 0;

    if (!ossl_init_thread_start(NULL, NULL, async_delete_thread_state))
        return 0;

    pool = OPENSSL_zalloc(sizeof(*pool));
    if (pool == NULL)
        return 0;

    pool->jobs = sk_ASYNC_JOB_new_reserve(NULL, init_size);
    if (pool->jobs == NULL) {
        ERR_raise(ERR_LIB_ASYNC, ERR_R_CRYPTO_LIB);
        OPENSSL_free(pool);
        return 0;
    }

    pool->max_size = max_size;

    /* Pre-create jobs as required */
    while (init_size--) {
        ASYNC_JOB *job;
        job = async_job_new();
        if (job == NULL || !async_fibre_makecontext(&job->fibrectx)) {
            /*
             * Not actually fatal because we already created the pool, just
             * skip creation of any more jobs
             */
            async_job_free(job);
            break;
        }
        job->funcargs = NULL;
        sk_ASYNC_JOB_push(pool->jobs, job); /* Cannot fail due to reserve */
        curr_size++;
    }
    pool->curr_size = curr_size;
    if (!CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
                                    CRYPTO_THREAD_NO_CONTEXT, pool)) {
        ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SET_POOL);
        goto err;
    }

    return 1;
err:
    async_empty_pool(pool);
    sk_ASYNC_JOB_free(pool->jobs);
    OPENSSL_free(pool);
    return 0;
}

static void async_delete_thread_state(void *arg)
{
    async_pool *pool = (async_pool *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
                                                                CRYPTO_THREAD_NO_CONTEXT);

    if (pool != NULL) {
        async_empty_pool(pool);
        sk_ASYNC_JOB_free(pool->jobs);
        OPENSSL_free(pool);
        CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
                                   CRYPTO_THREAD_NO_CONTEXT, NULL);
    }
    async_local_cleanup();
    async_ctx_free();
}

void ASYNC_cleanup_thread(void)
{
    if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
        return;

    async_delete_thread_state(NULL);
}

ASYNC_JOB *ASYNC_get_current_job(void)
{
    async_ctx *ctx;

    if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
        return NULL;

    ctx = async_get_ctx();
    if (ctx == NULL)
        return NULL;

    return ctx->currjob;
}

ASYNC_WAIT_CTX *ASYNC_get_wait_ctx(ASYNC_JOB *job)
{
    return job->waitctx;
}

void ASYNC_block_pause(void)
{
    async_ctx *ctx;

    if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
        return;

    ctx = async_get_ctx();
    if (ctx == NULL || ctx->currjob == NULL) {
        /*
         * We're not in a job anyway so ignore this
         */
        return;
    }
    ctx->blocked++;
}

void ASYNC_unblock_pause(void)
{
    async_ctx *ctx;

    if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
        return;

    ctx = async_get_ctx();
    if (ctx == NULL || ctx->currjob == NULL) {
        /*
         * We're not in a job anyway so ignore this
         */
        return;
    }
    if (ctx->blocked > 0)
        ctx->blocked--;
}

Coverage Report

Created: 2025-06-22 06:56

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2015-2022 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		/*
11		* Without this we start getting longjmp crashes because it thinks we're jumping
12		* up the stack when in fact we are jumping to an entirely different stack. The
13		* cost of this is not having certain buffer overrun/underrun checks etc for
14		* this source file :-(
15		*/
16		#undef _FORTIFY_SOURCE
17
18		/* This must be the first #include file */
19		#include "async_local.h"
20		#include "internal/threads_common.h"
21
22		#include <openssl/err.h>
23		#include "crypto/cryptlib.h"
24		#include <string.h>
25
26	0	#define ASYNC_JOB_RUNNING 0
27	0	#define ASYNC_JOB_PAUSING 1
28	0	#define ASYNC_JOB_PAUSED 2
29	0	#define ASYNC_JOB_STOPPING 3
30
31		static void async_delete_thread_state(void *arg);
32
33		static async_ctx *async_ctx_new(void)
34	0	{
35	0	async_ctx *nctx;
36
37	0	if (!ossl_init_thread_start(NULL, NULL, async_delete_thread_state))
38	0	return NULL;
39
40	0	nctx = OPENSSL_malloc(sizeof(*nctx));
41	0	if (nctx == NULL)
42	0	goto err;
43
44	0	async_fibre_init_dispatcher(&nctx->dispatcher);
45	0	nctx->currjob = NULL;
46	0	nctx->blocked = 0;
47	0	if (!CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_CTX_KEY,
48	0	CRYPTO_THREAD_NO_CONTEXT, nctx))
49	0	goto err;
50
51	0	return nctx;
52	0	err:
53	0	OPENSSL_free(nctx);
54
55	0	return NULL;
56	0	}
57
58		async_ctx *async_get_ctx(void)
59	0	{
60	0	return (async_ctx *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_CTX_KEY,
61	0	CRYPTO_THREAD_NO_CONTEXT);
62	0	}
63
64		static int async_ctx_free(void)
65	0	{
66	0	async_ctx *ctx;
67
68	0	ctx = async_get_ctx();
69
70	0	if (!CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_CTX_KEY,
71	0	CRYPTO_THREAD_NO_CONTEXT, NULL))
72	0	return 0;
73
74	0	OPENSSL_free(ctx);
75
76	0	return 1;
77	0	}
78
79		static ASYNC_JOB *async_job_new(void)
80	0	{
81	0	ASYNC_JOB *job = NULL;
82
83	0	job = OPENSSL_zalloc(sizeof(*job));
84	0	if (job == NULL)
85	0	return NULL;
86
87	0	job->status = ASYNC_JOB_RUNNING;
88
89	0	return job;
90	0	}
91
92		static void async_job_free(ASYNC_JOB *job)
93	0	{
94	0	if (job != NULL) {
95	0	OPENSSL_free(job->funcargs);
96	0	async_fibre_free(&job->fibrectx);
97	0	OPENSSL_free(job);
98	0	}
99	0	}
100
101	0	static ASYNC_JOB *async_get_pool_job(void) {
102	0	ASYNC_JOB *job;
103	0	async_pool *pool;
104
105	0	pool = (async_pool *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
106	0	CRYPTO_THREAD_NO_CONTEXT);
107	0	if (pool == NULL) {
108		/*
109		* Pool has not been initialised, so init with the defaults, i.e.
110		* no max size and no pre-created jobs
111		*/
112	0	if (ASYNC_init_thread(0, 0) == 0)
113	0	return NULL;
114	0	pool = (async_pool *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
115	0	CRYPTO_THREAD_NO_CONTEXT);
116	0	}
117
118	0	job = sk_ASYNC_JOB_pop(pool->jobs);
119	0	if (job == NULL) {
120		/* Pool is empty */
121	0	if ((pool->max_size != 0) && (pool->curr_size >= pool->max_size))
122	0	return NULL;
123
124	0	job = async_job_new();
125	0	if (job != NULL) {
126	0	if (! async_fibre_makecontext(&job->fibrectx)) {
127	0	async_job_free(job);
128	0	return NULL;
129	0	}
130	0	pool->curr_size++;
131	0	}
132	0	}
133	0	return job;
134	0	}
135
136	0	static void async_release_job(ASYNC_JOB *job) {
137	0	async_pool *pool;
138
139	0	pool = (async_pool *)CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
140	0	CRYPTO_THREAD_NO_CONTEXT);
141	0	if (pool == NULL) {
142	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
143	0	return;
144	0	}
145	0	OPENSSL_free(job->funcargs);
146	0	job->funcargs = NULL;
147	0	sk_ASYNC_JOB_push(pool->jobs, job);
148	0	}
149
150		void async_start_func(void)
151	0	{
152	0	ASYNC_JOB *job;
153	0	async_ctx *ctx = async_get_ctx();
154
155	0	if (ctx == NULL) {
156	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
157	0	return;
158	0	}
159	0	while (1) {
160		/* Run the job */
161	0	job = ctx->currjob;
162	0	job->ret = job->func(job->funcargs);
163
164		/* Stop the job */
165	0	job->status = ASYNC_JOB_STOPPING;
166	0	if (!async_fibre_swapcontext(&job->fibrectx,
167	0	&ctx->dispatcher, 1)) {
168		/*
169		* Should not happen. Getting here will close the thread...can't do
170		* much about it
171		*/
172	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
173	0	}
174	0	}
175	0	}
176
177		int ASYNC_start_job(ASYNC_JOB *job, ASYNC_WAIT_CTX wctx, int *ret,
178		int (func)(void ), void *args, size_t size)
179	0	{
180	0	async_ctx *ctx;
181	0	OSSL_LIB_CTX *libctx;
182
183	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
184	0	return ASYNC_ERR;
185
186	0	ctx = async_get_ctx();
187	0	if (ctx == NULL)
188	0	ctx = async_ctx_new();
189	0	if (ctx == NULL)
190	0	return ASYNC_ERR;
191
192	0	if (*job != NULL)
193	0	ctx->currjob = *job;
194
195	0	for (;;) {
196	0	if (ctx->currjob != NULL) {
197	0	if (ctx->currjob->status == ASYNC_JOB_STOPPING) {
198	0	*ret = ctx->currjob->ret;
199	0	ctx->currjob->waitctx = NULL;
200	0	async_release_job(ctx->currjob);
201	0	ctx->currjob = NULL;
202	0	*job = NULL;
203	0	return ASYNC_FINISH;
204	0	}
205
206	0	if (ctx->currjob->status == ASYNC_JOB_PAUSING) {
207	0	*job = ctx->currjob;
208	0	ctx->currjob->status = ASYNC_JOB_PAUSED;
209	0	ctx->currjob = NULL;
210	0	return ASYNC_PAUSE;
211	0	}
212
213	0	if (ctx->currjob->status == ASYNC_JOB_PAUSED) {
214	0	if (*job == NULL)
215	0	return ASYNC_ERR;
216	0	ctx->currjob = *job;
217
218		/*
219		* Restore the default libctx to what it was the last time the
220		* fibre ran
221		*/
222	0	libctx = OSSL_LIB_CTX_set0_default(ctx->currjob->libctx);
223	0	if (libctx == NULL) {
224		/* Failed to set the default context */
225	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
226	0	goto err;
227	0	}
228		/* Resume previous job */
229	0	if (!async_fibre_swapcontext(&ctx->dispatcher,
230	0	&ctx->currjob->fibrectx, 1)) {
231	0	ctx->currjob->libctx = OSSL_LIB_CTX_set0_default(libctx);
232	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
233	0	goto err;
234	0	}
235		/*
236		* In case the fibre changed the default libctx we set it back
237		* again to what it was originally, and remember what it had
238		* been changed to.
239		*/
240	0	ctx->currjob->libctx = OSSL_LIB_CTX_set0_default(libctx);
241	0	continue;
242	0	}
243
244		/* Should not happen */
245	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_INTERNAL_ERROR);
246	0	async_release_job(ctx->currjob);
247	0	ctx->currjob = NULL;
248	0	*job = NULL;
249	0	return ASYNC_ERR;
250	0	}
251
252		/* Start a new job */
253	0	if ((ctx->currjob = async_get_pool_job()) == NULL)
254	0	return ASYNC_NO_JOBS;
255
256	0	if (args != NULL) {
257	0	ctx->currjob->funcargs = OPENSSL_malloc(size);
258	0	if (ctx->currjob->funcargs == NULL) {
259	0	async_release_job(ctx->currjob);
260	0	ctx->currjob = NULL;
261	0	return ASYNC_ERR;
262	0	}
263	0	memcpy(ctx->currjob->funcargs, args, size);
264	0	} else {
265	0	ctx->currjob->funcargs = NULL;
266	0	}
267
268	0	ctx->currjob->func = func;
269	0	ctx->currjob->waitctx = wctx;
270	0	libctx = ossl_lib_ctx_get_concrete(NULL);
271	0	if (!async_fibre_swapcontext(&ctx->dispatcher,
272	0	&ctx->currjob->fibrectx, 1)) {
273	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
274	0	goto err;
275	0	}
276		/*
277		* In case the fibre changed the default libctx we set it back again
278		* to what it was, and remember what it had been changed to.
279		*/
280	0	ctx->currjob->libctx = OSSL_LIB_CTX_set0_default(libctx);
281	0	}
282
283	0	err:
284	0	async_release_job(ctx->currjob);
285	0	ctx->currjob = NULL;
286	0	*job = NULL;
287	0	return ASYNC_ERR;
288	0	}
289
290		int ASYNC_pause_job(void)
291	0	{
292	0	ASYNC_JOB *job;
293	0	async_ctx *ctx = async_get_ctx();
294
295	0	if (ctx == NULL
296	0	\|\| ctx->currjob == NULL
297	0	\|\| ctx->blocked) {
298		/*
299		* Could be we've deliberately not been started within a job so this is
300		* counted as success.
301		*/
302	0	return 1;
303	0	}
304
305	0	job = ctx->currjob;
306	0	job->status = ASYNC_JOB_PAUSING;
307
308	0	if (!async_fibre_swapcontext(&job->fibrectx,
309	0	&ctx->dispatcher, 1)) {
310	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
311	0	return 0;
312	0	}
313		/* Reset counts of added and deleted fds */
314	0	async_wait_ctx_reset_counts(job->waitctx);
315
316	0	return 1;
317	0	}
318
319		static void async_empty_pool(async_pool *pool)
320	0	{
321	0	ASYNC_JOB *job;
322
323	0	if (pool == NULL \|\| pool->jobs == NULL)
324	0	return;
325
326	0	do {
327	0	job = sk_ASYNC_JOB_pop(pool->jobs);
328	0	async_job_free(job);
329	0	} while (job);
330	0	}
331
332		int async_init(void)
333	0	{
334	0	return async_local_init();
335	0	}
336
337		void async_deinit(void)
338	0	{
339	0	async_local_deinit();
340	0	}
341
342		int ASYNC_init_thread(size_t max_size, size_t init_size)
343	0	{
344	0	async_pool *pool;
345	0	size_t curr_size = 0;
346
347	0	if (init_size > max_size) {
348	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_INVALID_POOL_SIZE);
349	0	return 0;
350	0	}
351
352	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
353	0	return 0;
354
355	0	if (!ossl_init_thread_start(NULL, NULL, async_delete_thread_state))
356	0	return 0;
357
358	0	pool = OPENSSL_zalloc(sizeof(*pool));
359	0	if (pool == NULL)
360	0	return 0;
361
362	0	pool->jobs = sk_ASYNC_JOB_new_reserve(NULL, init_size);
363	0	if (pool->jobs == NULL) {
364	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_CRYPTO_LIB);
365	0	OPENSSL_free(pool);
366	0	return 0;
367	0	}
368
369	0	pool->max_size = max_size;
370
371		/* Pre-create jobs as required */
372	0	while (init_size--) {
373	0	ASYNC_JOB *job;
374	0	job = async_job_new();
375	0	if (job == NULL \|\| !async_fibre_makecontext(&job->fibrectx)) {
376		/*
377		* Not actually fatal because we already created the pool, just
378		* skip creation of any more jobs
379		*/
380	0	async_job_free(job);
381	0	break;
382	0	}
383	0	job->funcargs = NULL;
384	0	sk_ASYNC_JOB_push(pool->jobs, job); /* Cannot fail due to reserve */
385	0	curr_size++;
386	0	}
387	0	pool->curr_size = curr_size;
388	0	if (!CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
389	0	CRYPTO_THREAD_NO_CONTEXT, pool)) {
390	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SET_POOL);
391	0	goto err;
392	0	}
393
394	0	return 1;
395	0	err:
396	0	async_empty_pool(pool);
397	0	sk_ASYNC_JOB_free(pool->jobs);
398	0	OPENSSL_free(pool);
399	0	return 0;
400	0	}
401
402		static void async_delete_thread_state(void *arg)
403	0	{
404	0	async_pool pool = (async_pool )CRYPTO_THREAD_get_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
405	0	CRYPTO_THREAD_NO_CONTEXT);
406
407	0	if (pool != NULL) {
408	0	async_empty_pool(pool);
409	0	sk_ASYNC_JOB_free(pool->jobs);
410	0	OPENSSL_free(pool);
411	0	CRYPTO_THREAD_set_local_ex(CRYPTO_THREAD_LOCAL_ASYNC_POOL_KEY,
412	0	CRYPTO_THREAD_NO_CONTEXT, NULL);
413	0	}
414	0	async_local_cleanup();
415	0	async_ctx_free();
416	0	}
417
418		void ASYNC_cleanup_thread(void)
419	0	{
420	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
421	0	return;
422
423	0	async_delete_thread_state(NULL);
424	0	}
425
426		ASYNC_JOB *ASYNC_get_current_job(void)
427	0	{
428	0	async_ctx *ctx;
429
430	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
431	0	return NULL;
432
433	0	ctx = async_get_ctx();
434	0	if (ctx == NULL)
435	0	return NULL;
436
437	0	return ctx->currjob;
438	0	}
439
440		ASYNC_WAIT_CTX ASYNC_get_wait_ctx(ASYNC_JOB job)
441	0	{
442	0	return job->waitctx;
443	0	}
444
445		void ASYNC_block_pause(void)
446	0	{
447	0	async_ctx *ctx;
448
449	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
450	0	return;
451
452	0	ctx = async_get_ctx();
453	0	if (ctx == NULL \|\| ctx->currjob == NULL) {
454		/*
455		* We're not in a job anyway so ignore this
456		*/
457	0	return;
458	0	}
459	0	ctx->blocked++;
460	0	}
461
462		void ASYNC_unblock_pause(void)
463	0	{
464	0	async_ctx *ctx;
465
466	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
467	0	return;
468
469	0	ctx = async_get_ctx();
470	0	if (ctx == NULL \|\| ctx->currjob == NULL) {
471		/*
472		* We're not in a job anyway so ignore this
473		*/
474	0	return;
475	0	}
476	0	if (ctx->blocked > 0)
477	0	ctx->blocked--;
478	0	}