/src/openssl31/crypto/async/async.c

Source (jump to first uncovered line)
/*
 * Copyright 2015-2021 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 <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 CRYPTO_THREAD_LOCAL ctxkey;
static CRYPTO_THREAD_LOCAL poolkey;

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) {
        ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
        goto err;
    }

    async_fibre_init_dispatcher(&nctx->dispatcher);
    nctx->currjob = NULL;
    nctx->blocked = 0;
    if (!CRYPTO_THREAD_set_local(&ctxkey, nctx))
        goto err;

    return nctx;
err:
    OPENSSL_free(nctx);

    return NULL;
}

async_ctx *async_get_ctx(void)
{
    return (async_ctx *)CRYPTO_THREAD_get_local(&ctxkey);
}

static int async_ctx_free(void)
{
    async_ctx *ctx;

    ctx = async_get_ctx();

    if (!CRYPTO_THREAD_set_local(&ctxkey, 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) {
        ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
        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(&poolkey);
    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(&poolkey);
    }

    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(&poolkey);
    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) {
                ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
                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)
{
    if (!CRYPTO_THREAD_init_local(&ctxkey, NULL))
        return 0;

    if (!CRYPTO_THREAD_init_local(&poolkey, NULL)) {
        CRYPTO_THREAD_cleanup_local(&ctxkey);
        return 0;
    }

    return 1;
}

void async_deinit(void)
{
    CRYPTO_THREAD_cleanup_local(&ctxkey);
    CRYPTO_THREAD_cleanup_local(&poolkey);
}

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) {
        ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
        return 0;
    }

    pool->jobs = sk_ASYNC_JOB_new_reserve(NULL, init_size);
    if (pool->jobs == NULL) {
        ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
        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(&poolkey, 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(&poolkey);

    if (pool != NULL) {
        async_empty_pool(pool);
        sk_ASYNC_JOB_free(pool->jobs);
        OPENSSL_free(pool);
        CRYPTO_THREAD_set_local(&poolkey, 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: 2025-06-13 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Copyright 2015-2021 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
21		#include <openssl/err.h>
22		#include "crypto/cryptlib.h"
23		#include <string.h>
24
25	0	#define ASYNC_JOB_RUNNING 0
26	0	#define ASYNC_JOB_PAUSING 1
27	0	#define ASYNC_JOB_PAUSED 2
28	0	#define ASYNC_JOB_STOPPING 3
29
30		static CRYPTO_THREAD_LOCAL ctxkey;
31		static CRYPTO_THREAD_LOCAL poolkey;
32
33		static void async_delete_thread_state(void *arg);
34
35		static async_ctx *async_ctx_new(void)
36	0	{
37	0	async_ctx *nctx;
38
39	0	if (!ossl_init_thread_start(NULL, NULL, async_delete_thread_state))
40	0	return NULL;
41
42	0	nctx = OPENSSL_malloc(sizeof(*nctx));
43	0	if (nctx == NULL) {
44	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
45	0	goto err;
46	0	}
47
48	0	async_fibre_init_dispatcher(&nctx->dispatcher);
49	0	nctx->currjob = NULL;
50	0	nctx->blocked = 0;
51	0	if (!CRYPTO_THREAD_set_local(&ctxkey, nctx))
52	0	goto err;
53
54	0	return nctx;
55	0	err:
56	0	OPENSSL_free(nctx);
57
58	0	return NULL;
59	0	}
60
61		async_ctx *async_get_ctx(void)
62	0	{
63	0	return (async_ctx *)CRYPTO_THREAD_get_local(&ctxkey);
64	0	}
65
66		static int async_ctx_free(void)
67	0	{
68	0	async_ctx *ctx;
69
70	0	ctx = async_get_ctx();
71
72	0	if (!CRYPTO_THREAD_set_local(&ctxkey, NULL))
73	0	return 0;
74
75	0	OPENSSL_free(ctx);
76
77	0	return 1;
78	0	}
79
80		static ASYNC_JOB *async_job_new(void)
81	0	{
82	0	ASYNC_JOB *job = NULL;
83
84	0	job = OPENSSL_zalloc(sizeof(*job));
85	0	if (job == NULL) {
86	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
87	0	return NULL;
88	0	}
89
90	0	job->status = ASYNC_JOB_RUNNING;
91
92	0	return job;
93	0	}
94
95		static void async_job_free(ASYNC_JOB *job)
96	0	{
97	0	if (job != NULL) {
98	0	OPENSSL_free(job->funcargs);
99	0	async_fibre_free(&job->fibrectx);
100	0	OPENSSL_free(job);
101	0	}
102	0	}
103
104	0	static ASYNC_JOB *async_get_pool_job(void) {
105	0	ASYNC_JOB *job;
106	0	async_pool *pool;
107
108	0	pool = (async_pool *)CRYPTO_THREAD_get_local(&poolkey);
109	0	if (pool == NULL) {
110		/*
111		* Pool has not been initialised, so init with the defaults, i.e.
112		* no max size and no pre-created jobs
113		*/
114	0	if (ASYNC_init_thread(0, 0) == 0)
115	0	return NULL;
116	0	pool = (async_pool *)CRYPTO_THREAD_get_local(&poolkey);
117	0	}
118
119	0	job = sk_ASYNC_JOB_pop(pool->jobs);
120	0	if (job == NULL) {
121		/* Pool is empty */
122	0	if ((pool->max_size != 0) && (pool->curr_size >= pool->max_size))
123	0	return NULL;
124
125	0	job = async_job_new();
126	0	if (job != NULL) {
127	0	if (! async_fibre_makecontext(&job->fibrectx)) {
128	0	async_job_free(job);
129	0	return NULL;
130	0	}
131	0	pool->curr_size++;
132	0	}
133	0	}
134	0	return job;
135	0	}
136
137	0	static void async_release_job(ASYNC_JOB *job) {
138	0	async_pool *pool;
139
140	0	pool = (async_pool *)CRYPTO_THREAD_get_local(&poolkey);
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	ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
260	0	async_release_job(ctx->currjob);
261	0	ctx->currjob = NULL;
262	0	return ASYNC_ERR;
263	0	}
264	0	memcpy(ctx->currjob->funcargs, args, size);
265	0	} else {
266	0	ctx->currjob->funcargs = NULL;
267	0	}
268
269	0	ctx->currjob->func = func;
270	0	ctx->currjob->waitctx = wctx;
271	0	libctx = ossl_lib_ctx_get_concrete(NULL);
272	0	if (!async_fibre_swapcontext(&ctx->dispatcher,
273	0	&ctx->currjob->fibrectx, 1)) {
274	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
275	0	goto err;
276	0	}
277		/*
278		* In case the fibre changed the default libctx we set it back again
279		* to what it was, and remember what it had been changed to.
280		*/
281	0	ctx->currjob->libctx = OSSL_LIB_CTX_set0_default(libctx);
282	0	}
283
284	0	err:
285	0	async_release_job(ctx->currjob);
286	0	ctx->currjob = NULL;
287	0	*job = NULL;
288	0	return ASYNC_ERR;
289	0	}
290
291		int ASYNC_pause_job(void)
292	0	{
293	0	ASYNC_JOB *job;
294	0	async_ctx *ctx = async_get_ctx();
295
296	0	if (ctx == NULL
297	0	\|\| ctx->currjob == NULL
298	0	\|\| ctx->blocked) {
299		/*
300		* Could be we've deliberately not been started within a job so this is
301		* counted as success.
302		*/
303	0	return 1;
304	0	}
305
306	0	job = ctx->currjob;
307	0	job->status = ASYNC_JOB_PAUSING;
308
309	0	if (!async_fibre_swapcontext(&job->fibrectx,
310	0	&ctx->dispatcher, 1)) {
311	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SWAP_CONTEXT);
312	0	return 0;
313	0	}
314		/* Reset counts of added and deleted fds */
315	0	async_wait_ctx_reset_counts(job->waitctx);
316
317	0	return 1;
318	0	}
319
320		static void async_empty_pool(async_pool *pool)
321	0	{
322	0	ASYNC_JOB *job;
323
324	0	if (pool == NULL \|\| pool->jobs == NULL)
325	0	return;
326
327	0	do {
328	0	job = sk_ASYNC_JOB_pop(pool->jobs);
329	0	async_job_free(job);
330	0	} while (job);
331	0	}
332
333		int async_init(void)
334	32	{
335	32	if (!CRYPTO_THREAD_init_local(&ctxkey, NULL))
336	0	return 0;
337
338	32	if (!CRYPTO_THREAD_init_local(&poolkey, NULL)) {
339	0	CRYPTO_THREAD_cleanup_local(&ctxkey);
340	0	return 0;
341	0	}
342
343	32	return 1;
344	32	}
345
346		void async_deinit(void)
347	32	{
348	32	CRYPTO_THREAD_cleanup_local(&ctxkey);
349	32	CRYPTO_THREAD_cleanup_local(&poolkey);
350	32	}
351
352		int ASYNC_init_thread(size_t max_size, size_t init_size)
353	0	{
354	0	async_pool *pool;
355	0	size_t curr_size = 0;
356
357	0	if (init_size > max_size) {
358	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_INVALID_POOL_SIZE);
359	0	return 0;
360	0	}
361
362	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
363	0	return 0;
364
365	0	if (!ossl_init_thread_start(NULL, NULL, async_delete_thread_state))
366	0	return 0;
367
368	0	pool = OPENSSL_zalloc(sizeof(*pool));
369	0	if (pool == NULL) {
370	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
371	0	return 0;
372	0	}
373
374	0	pool->jobs = sk_ASYNC_JOB_new_reserve(NULL, init_size);
375	0	if (pool->jobs == NULL) {
376	0	ERR_raise(ERR_LIB_ASYNC, ERR_R_MALLOC_FAILURE);
377	0	OPENSSL_free(pool);
378	0	return 0;
379	0	}
380
381	0	pool->max_size = max_size;
382
383		/* Pre-create jobs as required */
384	0	while (init_size--) {
385	0	ASYNC_JOB *job;
386	0	job = async_job_new();
387	0	if (job == NULL \|\| !async_fibre_makecontext(&job->fibrectx)) {
388		/*
389		* Not actually fatal because we already created the pool, just
390		* skip creation of any more jobs
391		*/
392	0	async_job_free(job);
393	0	break;
394	0	}
395	0	job->funcargs = NULL;
396	0	sk_ASYNC_JOB_push(pool->jobs, job); /* Cannot fail due to reserve */
397	0	curr_size++;
398	0	}
399	0	pool->curr_size = curr_size;
400	0	if (!CRYPTO_THREAD_set_local(&poolkey, pool)) {
401	0	ERR_raise(ERR_LIB_ASYNC, ASYNC_R_FAILED_TO_SET_POOL);
402	0	goto err;
403	0	}
404
405	0	return 1;
406	0	err:
407	0	async_empty_pool(pool);
408	0	sk_ASYNC_JOB_free(pool->jobs);
409	0	OPENSSL_free(pool);
410	0	return 0;
411	0	}
412
413		static void async_delete_thread_state(void *arg)
414	0	{
415	0	async_pool pool = (async_pool )CRYPTO_THREAD_get_local(&poolkey);
416
417	0	if (pool != NULL) {
418	0	async_empty_pool(pool);
419	0	sk_ASYNC_JOB_free(pool->jobs);
420	0	OPENSSL_free(pool);
421	0	CRYPTO_THREAD_set_local(&poolkey, NULL);
422	0	}
423	0	async_local_cleanup();
424	0	async_ctx_free();
425	0	}
426
427		void ASYNC_cleanup_thread(void)
428	0	{
429	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
430	0	return;
431
432	0	async_delete_thread_state(NULL);
433	0	}
434
435		ASYNC_JOB *ASYNC_get_current_job(void)
436	0	{
437	0	async_ctx *ctx;
438
439	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
440	0	return NULL;
441
442	0	ctx = async_get_ctx();
443	0	if (ctx == NULL)
444	0	return NULL;
445
446	0	return ctx->currjob;
447	0	}
448
449		ASYNC_WAIT_CTX ASYNC_get_wait_ctx(ASYNC_JOB job)
450	0	{
451	0	return job->waitctx;
452	0	}
453
454		void ASYNC_block_pause(void)
455	0	{
456	0	async_ctx *ctx;
457
458	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
459	0	return;
460
461	0	ctx = async_get_ctx();
462	0	if (ctx == NULL \|\| ctx->currjob == NULL) {
463		/*
464		* We're not in a job anyway so ignore this
465		*/
466	0	return;
467	0	}
468	0	ctx->blocked++;
469	0	}
470
471		void ASYNC_unblock_pause(void)
472	0	{
473	0	async_ctx *ctx;
474
475	0	if (!OPENSSL_init_crypto(OPENSSL_INIT_ASYNC, NULL))
476	0	return;
477
478	0	ctx = async_get_ctx();
479	0	if (ctx == NULL \|\| ctx->currjob == NULL) {
480		/*
481		* We're not in a job anyway so ignore this
482		*/
483	0	return;
484	0	}
485	0	if (ctx->blocked > 0)
486	0	ctx->blocked--;
487	0	}