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.\" ========================================================================
.\"
.IX Title "OSSL_SLEEP 3ossl"
.TH OSSL_SLEEP 3ossl "2024-01-30" "3.2.1" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
OSSL_sleep \- delay execution for a specified number of milliseconds
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/crypto.h>
\&
\& void OSSL_sleep(uint64_t millis);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIOSSL_sleep()\fR is a convenience function to delay execution of the calling
thread for (at least) \fImillis\fR 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.
.PP
In particular on Windows the maximum amount of time it will sleep is
49 days and on systems where the regular \fIsleep\fR\|(3) is used as the underlying
system call the maximum sleep time is about 136 years.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fIOSSL_sleep()\fR does not return any value.
.SH "HISTORY"
.IX Header "HISTORY"
\&\fIOSSL_sleep()\fR was added in OpenSSL 3.2.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2022\-2023 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.