.\"Copyright 2011 (c) EPFL
.TH DTK_ADDTIME 3 2011 "EPFL" "Draw Toolkit manual"
.SH NAME
dtk_difftime_s, dtk_difftime_ms, dtk_difftime_us, dtk_difftime_ns - timestamp difference
.SH SYNOPSIS
.LP
.B #include <dtk_time.h>
.sp
.BI "long dtk_difftime_s(const struct dtk_timespec* " ts ","
.br
.BI "                    const struct dtk_timespec* " orig ");"
.br
.BI "long dtk_difftime_ms(const struct dtk_timespec* " ts ","
.br
.BI "                     const struct dtk_timespec* " orig ");"
.br
.BI "long dtk_difftime_us(const struct dtk_timespec* " ts ","
.br
.BI "                     const struct dtk_timespec* " orig ");"
.br
.BI "long dtk_difftime_ns(const struct dtk_timespec* " ts ","
.br
.BI "                     const struct dtk_timespec* " orig ");"
.br
.SH DESCRIPTION
These functions returns the difference of time from \fIorig\fP to \fIts\fP.
.LP
\fBdtk_difftime_s\fP() returns the difference in seconds. 
.LP
\fBdtk_difftime_ms\fP() returns the difference in milliseconds. 
.LP
\fBdtk_difftime_us\fP() returns the difference in microseconds. 
.LP
\fBdtk_difftime_ns\fP() returns the difference in nanoseconds. 
.SH "RETURN VALUE"
.LP
All the functions return the difference of time.
.SH "SEE ALSO"
.BR dtk_nanosleep (3),
.BR dtk_gettime (3),
.BR dtk_addtime (3)