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.\" (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de)
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\" License.
.\" Modified Sat Jul 24 21:27:01 1993 by Rik Faith (faith@cs.unc.edu)
.TH CLOCK 3 "April 21, 1993" "GNU" "Linux Programmer's Manual"
.SH NOME
clock \- Retorna o tempo de CPU
.SH SINOPSE
.nf
.B #include <time.h>
.sp
.B clock_t clock(void);
.fi
.SH DESCRIO
A funo
.B clock()
retorna uma aproximao do tempo de processamento usado pelo programa.
.SH "VALOR RETORNADO"
O tempo de CPU usado no formato
.BR clock_t .
Para obter o nmero de segundos, divida por
.BR CLOCKS_PER_SEC .
.SH "DE ACORDO COM"
ANSI C.
A POSIX exige que CLOCKS_PER_SEC seja 1000000 independente da resoluo
verdadeira.
.SH "BUGS"
O padro C permite valores arbitrrios no incio do programa. Use a diferena
entre uma chamada a
.B clock()
no incio e outra no final do programa para obter portabilidade mxima.
.PP
O tempo pode sofrer overflow: num sistema de 32 bits com CLOCKS_PER_SEC igual
a 1000000, esta funo retornar um valor idntico aproximadamente a cada 72
minutos.
.PP
A funo
.B times()
retorna mais informaes.
.SH "VER TAMBM"
.BR times (2)
.SH TRADUZIDO POR LDP-BR em 21/08/2000.
\&\fR\&\f(CWPaulo Csar Mendes <drpc@ism.com.br> (traduo)\fR
\&\fR\&\f(CWxxxxxxxxxxxxxxxxxxxxxxxxx <xxx@xxxxxx.xxx.xx> (reviso)\fR
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