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+.\" Copyright (C) 2024 Alejandro Colomar <alx@kernel.org>
+.\"
+.\" SPDX-License-Identifier: Linux-man-pages-copyleft
+.\"
+.TH TIMEVAL_TO_TIMESPEC 3 2024-03-12 "Linux man-pages 6.7"
+.SH NAME
+TIMEVAL_TO_TIMESPEC,
+TIMESPEC_TO_TIMEVAL
+\-
+convert between time structures
+.SH SYNOPSIS
+.nf
+.B #define _GNU_SOURCE
+.B #include <sys/time.h>
+.P
+.BI "void TIMEVAL_TO_TIMESPEC(const struct timeval *" tv ", struct timespec *" ts );
+.BI "void TIMESPEC_TO_TIMEVAL(struct timeval *" tv ", const struct timespec *" ts );
+.fi
+.SH DESCRIPTION
+These macros convert from a
+.BR timeval (3type)
+to a
+.BR timespec (3type)
+structure,
+and vice versa,
+respectively.
+.P
+This is especially useful for writing interfaces that receive a type,
+but are implemented with calls to functions that receive the other one.
+.SH STANDARDS
+GNU,
+BSD.