158 lines
3.7 KiB
C
158 lines
3.7 KiB
C
/*
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* Copyright 2019-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/configuration.h>
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#include <openssl/e_os2.h>
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#include <openssl/types.h>
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#include <openssl/crypto.h>
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#include <internal/thread.h>
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#include <internal/thread_arch.h>
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#if !defined(OPENSSL_NO_DEFAULT_THREAD_POOL)
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static ossl_inline uint64_t _ossl_get_avail_threads(OSSL_LIB_CTX_THREADS *tdata)
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{
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/* assumes that tdata->lock is taken */
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return tdata->max_threads - tdata->active_threads;
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}
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uint64_t ossl_get_avail_threads(OSSL_LIB_CTX *ctx)
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{
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uint64_t retval = 0;
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OSSL_LIB_CTX_THREADS *tdata = OSSL_LIB_CTX_GET_THREADS(ctx);
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if (tdata == NULL)
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return retval;
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ossl_crypto_mutex_lock(tdata->lock);
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retval = _ossl_get_avail_threads(tdata);
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ossl_crypto_mutex_unlock(tdata->lock);
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return retval;
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}
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void *ossl_crypto_thread_start(OSSL_LIB_CTX *ctx, CRYPTO_THREAD_ROUTINE start,
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void *data)
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{
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CRYPTO_THREAD *thread;
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OSSL_LIB_CTX_THREADS *tdata = OSSL_LIB_CTX_GET_THREADS(ctx);
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if (tdata == NULL)
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return NULL;
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ossl_crypto_mutex_lock(tdata->lock);
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if (tdata == NULL || tdata->max_threads == 0) {
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ossl_crypto_mutex_unlock(tdata->lock);
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return NULL;
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}
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while (_ossl_get_avail_threads(tdata) == 0)
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ossl_crypto_condvar_wait(tdata->cond_finished, tdata->lock);
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tdata->active_threads++;
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ossl_crypto_mutex_unlock(tdata->lock);
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thread = ossl_crypto_thread_native_start(start, data, 1);
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if (thread == NULL) {
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ossl_crypto_mutex_lock(tdata->lock);
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tdata->active_threads--;
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ossl_crypto_mutex_unlock(tdata->lock);
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goto fail;
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}
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thread->ctx = ctx;
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fail:
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return (void *) thread;
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}
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int ossl_crypto_thread_join(void *vhandle, CRYPTO_THREAD_RETVAL *retval)
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{
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CRYPTO_THREAD *handle = vhandle;
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OSSL_LIB_CTX_THREADS *tdata;
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if (vhandle == NULL)
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return 0;
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tdata = OSSL_LIB_CTX_GET_THREADS(handle->ctx);
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if (tdata == NULL)
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return 0;
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if (ossl_crypto_thread_native_join(handle, retval) == 0)
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return 0;
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ossl_crypto_mutex_lock(tdata->lock);
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tdata->active_threads--;
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ossl_crypto_condvar_signal(tdata->cond_finished);
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ossl_crypto_mutex_unlock(tdata->lock);
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return 1;
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}
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int ossl_crypto_thread_clean(void *vhandle)
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{
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CRYPTO_THREAD *handle = vhandle;
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return ossl_crypto_thread_native_clean(handle);
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}
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#else
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ossl_inline uint64_t ossl_get_avail_threads(OSSL_LIB_CTX *ctx)
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{
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return 0;
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}
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void *ossl_crypto_thread_start(OSSL_LIB_CTX *ctx, CRYPTO_THREAD_ROUTINE start,
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void *data)
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{
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return NULL;
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}
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int ossl_crypto_thread_join(void *vhandle, CRYPTO_THREAD_RETVAL *retval)
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{
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return 0;
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}
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int ossl_crypto_thread_clean(void *vhandle)
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{
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return 0;
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}
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#endif
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void *ossl_threads_ctx_new(OSSL_LIB_CTX *ctx)
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{
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struct openssl_threads_st *t = OPENSSL_zalloc(sizeof(*t));
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if (t == NULL)
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return NULL;
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t->lock = ossl_crypto_mutex_new();
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t->cond_finished = ossl_crypto_condvar_new();
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if (t->lock == NULL || t->cond_finished == NULL)
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goto fail;
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return t;
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fail:
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ossl_threads_ctx_free((void *)t);
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return NULL;
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}
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void ossl_threads_ctx_free(void *vdata)
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{
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OSSL_LIB_CTX_THREADS *t = (OSSL_LIB_CTX_THREADS *) vdata;
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if (t == NULL)
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return;
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ossl_crypto_mutex_free(&t->lock);
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ossl_crypto_condvar_free(&t->cond_finished);
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OPENSSL_free(t);
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}
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