IPC::ScoreBoard IPC similar to the Apache scoreboard
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IPC::ScoreBoard Ranking & Summary

IPC::ScoreBoard Tags

Perl module Apache Scoreboard IPC Apache scoreboard

IPC::ScoreBoard Description

IPC similar to the Apache scoreboard A scoreboard is a set of integer numbers residing in shared memory. It is organized as 2-dimensional array where a line in one of the dimensions is called a slot. So, in other words the scoreboard is a set of slots and each slot is a set of integer numbers.The idea is that in a system of processes or threads of execution each process owns a slot. A process can change the values in its own slot at will but must adhere to read-only access to other slots.There is one extra slot at the end of the scoreboard that is allowed to be used by every process. However the IPC::ScoreBoard module does not provide any kind of locking to synchronize access.The extra slot can differ in size from the other normal slots.A scoreboard can be anonymous or it can have a name in the file system and hence be accessed by unrelated processes.SYNOPSIS use IPC::ScoreBoard; # create an anonymous scoreboard my $sb=SB::anon $nslots, $slotsize, $extra; # create a file base board my $sb=SB::named $filename, $nslots, $slotsize, $extra; # open a file based board my ($sb, $nslots, $slotsize, $extra)=SB::open $filename; # set/set a value SB::set $sb, $slotidx, $elidx, $integer_value; $value=SB::get $sb, $slotidx, $elidx; @values=SB::get_all $sb, $slotidx; # increment/decrement SB::incr $sb, $slotidx, $elidx, $integer_value; SB::decr $sb, $slotidx, $elidx, $integer_value; # sum functions $sum=SB::sum $sb, $elidx; @sums=SB::sum_all $sb; # access extra space SB::set_extra $sb, $elidx, $integer_value; $value=SB::get_extra $sb, $elidx; @values=SB::get_all_extra $sb; SB::incr_extra $sb, $elidx, $integer_value; SB::decr_extra $sb, $elidx, $integer_value; # fetch parameters $nslots=SB::nslots $sb; $slotsize=SB::slotsize $sb; $nextra=SB::nextra $sb; # does the compiler provide atomic increment/decrement operations? if( SB::have_atomics ) { # increment and decrement operations are atomic } Requirements: · Perl

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