| | 1 | .\" Copyright (c) 1990, 1991, 1993 |
| | 2 | .\" The Regents of the University of California. All rights reserved. |
| | 3 | .\" |
| | 4 | .\" This code is derived from software contributed to Berkeley by |
| | 5 | .\" the American National Standards Committee X3, on Information |
| | 6 | .\" Processing Systems. |
| | 7 | .\" |
| | 8 | .\" Redistribution and use in source and binary forms, with or without |
| | 9 | .\" modification, are permitted provided that the following conditions |
| | 10 | .\" are met: |
| | 11 | .\" 1. Redistributions of source code must retain the above copyright |
| | 12 | .\" notice, this list of conditions and the following disclaimer. |
| | 13 | .\" 2. Redistributions in binary form must reproduce the above copyright |
| | 14 | .\" notice, this list of conditions and the following disclaimer in the |
| | 15 | .\" documentation and/or other materials provided with the distribution. |
| | 16 | .\" 4. Neither the name of the University nor the names of its contributors |
| | 17 | .\" may be used to endorse or promote products derived from this software |
| | 18 | .\" without specific prior written permission. |
| | 19 | .\" |
| | 20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 30 | .\" SUCH DAMAGE. |
| | 31 | .\" |
| | 32 | .\" @(#)clock.3 8.1 (Berkeley) 6/4/93 |
| | 33 | .\" $FreeBSD$ |
| | 34 | .\" |
| | 35 | .Dd June 4, 1993 |
| | 36 | .Dt CLOCK 3 |
| | 37 | .Os |
| | 38 | .Sh NAME |
| | 39 | .Nm clock |
| | 40 | .Nd determine processor time used |
| | 41 | .Sh LIBRARY |
| | 42 | .Lb libc |
| | 43 | .Sh SYNOPSIS |
| | 44 | .In time.h |
| | 45 | .Ft clock_t |
| | 46 | .Fn clock void |
| | 47 | .Sh DESCRIPTION |
| | 48 | The |
| | 49 | .Fn clock |
| | 50 | function |
| | 51 | determines the amount of processor time used since the invocation of the |
| | 52 | calling process, measured in |
| | 53 | .Dv CLOCKS_PER_SEC Ns s |
| | 54 | of a second. |
| | 55 | .Sh RETURN VALUES |
| | 56 | The |
| | 57 | .Fn clock |
| | 58 | function returns the amount of time used unless an error occurs, in which |
| | 59 | case the return value is \-1. |
| | 60 | .Sh SEE ALSO |
| | 61 | .Xr getrusage 2 |
| | 62 | .Sh STANDARDS |
| | 63 | The |
| | 64 | .Fn clock |
| | 65 | function conforms to |
| | 66 | .St -isoC |
| | 67 | and |
| | 68 | .St -susv3 |
| | 69 | which requires |
| | 70 | .Dv CLOCKS_PER_SEC |
| | 71 | to be defined as one million. |
projects / apple / libc.git / blame_incremental