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Diffstat (limited to 'pod/perlfunc.pod')
| -rw-r--r-- | pod/perlfunc.pod | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/pod/perlfunc.pod b/pod/perlfunc.pod index 1afa901c76..13bca13f44 100644 --- a/pod/perlfunc.pod +++ b/pod/perlfunc.pod @@ -445,12 +445,12 @@ previous timer, and an argument of C<0> may be supplied to cancel the previous timer without starting a new one. The returned value is the amount of time remaining on the previous timer. -For delays of finer granularity than one second, you may use Perl's -four-argument version of select() leaving the first three arguments -undefined, or you might be able to use the C<syscall> interface to -access setitimer(2) if your system supports it. The Time::HiRes -module (from CPAN, and starting from Perl 5.8 part of the standard -distribution) may also prove useful. +For delays of finer granularity than one second, the Time::HiRes module +(from CPAN, and starting from Perl 5.8 part of the standard +distribution) provides ualarm(). You may also use Perl's four-argument +version of select() leaving the first three arguments undefined, or you +might be able to use the C<syscall> interface to access setitimer(2) if +your system supports it. See L<perlfaq8> for details. It is usually a mistake to intermix C<alarm> and C<sleep> calls. (C<sleep> may be internally implemented in your system with C<alarm>) @@ -5108,11 +5108,12 @@ always sleep the full amount. They may appear to sleep longer than that, however, because your process might not be scheduled right away in a busy multitasking system. -For delays of finer granularity than one second, you may use Perl's -C<syscall> interface to access setitimer(2) if your system supports -it, or else see L</select> above. The Time::HiRes module (from CPAN, -and starting from Perl 5.8 part of the standard distribution) may also -help. +For delays of finer granularity than one second, the Time::HiRes module +(from CPAN, and starting from Perl 5.8 part of the standard +distribution) provides usleep(). You may also use Perl's four-argument +version of select() leaving the first three arguments undefined, or you +might be able to use the C<syscall> interface to access setitimer(2) if +your system supports it. See L<perlfaq8> for details. See also the POSIX module's C<pause> function. |