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      1 /*
      2  * Copyright 2019-2021 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 #include <openssl/configuration.h>
     11 #include <openssl/thread.h>
     12 #include <internal/thread.h>
     13 
     14 uint32_t OSSL_get_thread_support_flags(void)
     15 {
     16     int support = 0;
     17 
     18 #if !defined(OPENSSL_NO_THREAD_POOL)
     19     support |= OSSL_THREAD_SUPPORT_FLAG_THREAD_POOL;
     20 #endif
     21 #if !defined(OPENSSL_NO_DEFAULT_THREAD_POOL)
     22     support |= OSSL_THREAD_SUPPORT_FLAG_DEFAULT_SPAWN;
     23 #endif
     24 
     25     return support;
     26 }
     27 
     28 #if defined(OPENSSL_NO_THREAD_POOL) || defined(OPENSSL_NO_DEFAULT_THREAD_POOL)
     29 
     30 int OSSL_set_max_threads(OSSL_LIB_CTX *ctx, uint64_t max_threads)
     31 {
     32     return 0;
     33 }
     34 
     35 uint64_t OSSL_get_max_threads(OSSL_LIB_CTX *ctx)
     36 {
     37     return 0;
     38 }
     39 
     40 #else
     41 
     42 uint64_t OSSL_get_max_threads(OSSL_LIB_CTX *ctx)
     43 {
     44     uint64_t ret = 0;
     45     OSSL_LIB_CTX_THREADS *tdata = OSSL_LIB_CTX_GET_THREADS(ctx);
     46 
     47     if (tdata == NULL)
     48         goto fail;
     49 
     50     ossl_crypto_mutex_lock(tdata->lock);
     51     ret = tdata->max_threads;
     52     ossl_crypto_mutex_unlock(tdata->lock);
     53 
     54 fail:
     55     return ret;
     56 }
     57 
     58 int OSSL_set_max_threads(OSSL_LIB_CTX *ctx, uint64_t max_threads)
     59 {
     60     OSSL_LIB_CTX_THREADS *tdata;
     61 
     62     tdata = OSSL_LIB_CTX_GET_THREADS(ctx);
     63     if (tdata == NULL)
     64         return 0;
     65 #ifdef __NetBSD__
     66     /*
     67      * Applications must link against libpthread in order to enable
     68      * openssl thread support.
     69      */
     70     extern int __isthreaded;	/* XXX */
     71     if (!__isthreaded)
     72         return 0;
     73 #endif
     74 
     75     ossl_crypto_mutex_lock(tdata->lock);
     76     tdata->max_threads = max_threads;
     77     ossl_crypto_mutex_unlock(tdata->lock);
     78 
     79     return 1;
     80 }
     81 
     82 #endif
     83