Updated: 2025/Nov/16

Please read Privacy Policy. It's for your privacy.

OSSL_sleep(3)                       OpenSSL                      OSSL_sleep(3)


NAME
       OSSL_sleep - delay execution for a specified number of milliseconds

SYNOPSIS
        #include <openssl/crypto.h>

        void OSSL_sleep(uint64_t millis);

DESCRIPTION
       OSSL_sleep() is a convenience function to delay execution of the
       calling thread for (at least) millis milliseconds.  The delay is not
       guaranteed; it may be affected by system activity, by the time spent
       processing the call, limitation on the underlying system call parameter
       size or by system timer granularity.

       In particular on Windows the maximum amount of time it will sleep is 49
       days and on systems where the regular sleep(3) is used as the
       underlying system call the maximum sleep time is about 136 years.

RETURN VALUES
       OSSL_sleep() does not return any value.

HISTORY
       OSSL_sleep() was added in OpenSSL 3.2.

COPYRIGHT
       Copyright 2022-2023 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>.

3.5.1                             2025-07-01                     OSSL_sleep(3)