1 files changed, 73 insertions, 0 deletions
diff --git a/crypto/thread/api.c b/crypto/thread/api.c
new file mode 100644
index 000000000000..e025d24cea6f
--- /dev/null
+++ b/crypto/thread/api.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2019-2021 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
+ */
+
+#include <openssl/configuration.h>
+#include <openssl/thread.h>
+#include <internal/thread.h>
+
+uint32_t OSSL_get_thread_support_flags(void)
+{
+    int support = 0;
+
+#if !defined(OPENSSL_NO_THREAD_POOL)
+    support |= OSSL_THREAD_SUPPORT_FLAG_THREAD_POOL;
+#endif
+#if !defined(OPENSSL_NO_DEFAULT_THREAD_POOL)
+    support |= OSSL_THREAD_SUPPORT_FLAG_DEFAULT_SPAWN;
+#endif
+
+    return support;
+}
+
+#if defined(OPENSSL_NO_THREAD_POOL) || defined(OPENSSL_NO_DEFAULT_THREAD_POOL)
+
+int OSSL_set_max_threads(OSSL_LIB_CTX *ctx, uint64_t max_threads)
+{
+    return 0;
+}
+
+uint64_t OSSL_get_max_threads(OSSL_LIB_CTX *ctx)
+{
+    return 0;
+}
+
+#else
+
+uint64_t OSSL_get_max_threads(OSSL_LIB_CTX *ctx)
+{
+    uint64_t ret = 0;
+    OSSL_LIB_CTX_THREADS *tdata = OSSL_LIB_CTX_GET_THREADS(ctx);
+
+    if (tdata == NULL)
+        goto fail;
+
+    ossl_crypto_mutex_lock(tdata->lock);
+    ret = tdata->max_threads;
+    ossl_crypto_mutex_unlock(tdata->lock);
+
+fail:
+    return ret;
+}
+
+int OSSL_set_max_threads(OSSL_LIB_CTX *ctx, uint64_t max_threads)
+{
+    OSSL_LIB_CTX_THREADS *tdata;
+
+    tdata = OSSL_LIB_CTX_GET_THREADS(ctx);
+    if (tdata == NULL)
+        return 0;
+
+    ossl_crypto_mutex_lock(tdata->lock);
+    tdata->max_threads = max_threads;
+    ossl_crypto_mutex_unlock(tdata->lock);
+
+    return 1;
+}
+
+#endif