#semaphores
my $writelog = Thread::Semaphore->new(); #sequential log writing

#LIBS:
use common;

open my $LOGFH ,">", $files{log}{file}; #from common
#disable write buffer
my $stdout = select($LOGFH);
$| = 1;
select($stdout);

require other;
other->import(\$LOGFH, \$writelog); #FH, SEM

logLine("TEST");

sub logLine {
	my ($text) =@_;
	chomp($text);
	my ($package, $filename, $line) = caller;
	my $FunctionName = (caller(1))[3];
	if ($FunctionName =~ m/::(.+)/) {
		$FunctionName = $1;
	}
	my $time = localtime time;

	#do sprintf left align truncate until sprintf supports
	if ($files{log}{fileNameLen} =~ m/-\d+\.(\d+)/) {
		$filename = substr($filename, 0, $1);
	}
	if ($files{log}{funNameLen} =~ m/-\d+\.(\d+)/) {
		$FunctionName = substr($FunctionName, 0, $1);
	}

	my $header = sprintf("%*s, %*s, %*s, %*s:", $files{log}{timeLen}, $time, $files{log}{fileNameLen}, $filename, $files{log}{funNameLen}, $FunctionName, $files{log}{lineNumLen}, $line);
	print "$header $text\n"; #only for testing
	if (defined $writelog and defined $LOGFH) {
		$writelog->down();
		print $LOGFH "$header $text\n";
		$writelog->up();
	}
}

##</code><code>##

package other;

use Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw($sourcepath %files);

our $sourcepath = dirname(Cwd::abs_path(__FILE__)); #Where am I located at?
unless ($sourcepath =~ m/\\$/) {
	$sourcepath .= "\\";
}

our %files = (
	log => {
		file => $sourcepath."file.log",
		fileNameLen => -22.22,
		funNameLen => -21.21,
		lineNumLen => 5,
		timeLen => 24.24,
	},
);

##</code><code>##

package other.pm

use common;

sub import {
	shift;
	$LOGFH = ${$_[0]};
	$writelog = ${$_[1]};
}

logLine("TEST");

sub logLine {
	my ($text) =@_;
	chomp($text);
	my ($package, $filename, $line) = caller;
	my $FunctionName = (caller(1))[3];
	if ($FunctionName =~ m/::(.+)/) {
		$FunctionName = $1;
	}
	my $time = localtime time;

	#do sprintf left align truncate until sprintf supports
	if ($files{log}{fileNameLen} =~ m/-\d+\.(\d+)/) {
		$filename = substr($filename, 0, $1);
	}
	if ($files{log}{funNameLen} =~ m/-\d+\.(\d+)/) {
		$FunctionName = substr($FunctionName, 0, $1);
	}

	my $header = sprintf("%*s, %*s, %*s, %*s:", $files{log}{timeLen}, $time, $files{log}{fileNameLen}, $filename, $files{log}{funNameLen}, $FunctionName, $files{log}{lineNumLen}, $line);
	print "$header $text\n"; #only for testing
	if (defined $writelog and defined $LOGFH) {
		$writelog->down();
		print $LOGFH "$header $text\n";
		$writelog->up();
	}
}

##</code><code>##

sub debugLogFunctionNameLineNum {
#debugLogFunctionNameLineNum((caller(0))[2],(caller(1))[3], @_);
	my ($callerline, $caller, @input) = @_;
	my $input_msg = "";
	for (my $i = 0; $i < @input; $i++) {
		unless (defined $input[$i]) {
			$input[$i] = "undef";
		}
		$input_msg .= "$i=>$input[$i]";
		if ($i < $#input) {
			$input_msg .= ", ";
		}
	}
	my ($package, $filename, $line) = caller;
	unless ($caller) {
		$caller = $filename;
	}
	if ($caller =~ m/eval/) {
		$caller = "Tk call";
		$callerline = "Unknown";
	} else {
		if ($callerline =~ m/::(.+)/) {
			$callerline = $1;
		}
	}
	my $FunctionName = (caller(1))[3];
	if ($FunctionName =~ m/::(.+)/) {
		$FunctionName = $1;
	}
	my $time = localtime time;
	unless ($FunctionName) {
		$FunctionName = "MAIN";
	}

	#do sprintf left align truncate until sprintf supports
	if ($files{log}{fileNameLen} =~ m/-\d+\.(\d+)/) {
		$filename = substr($filename, 0, $1);
	}
	if ($files{log}{funNameLen} =~ m/-\d+\.(\d+)/) {
		$FunctionName = substr($FunctionName, 0, $1);
	}

	my $header = sprintf("%*s, %*s, %*s, %*s:", $files{log}{timeLen}, $time, $files{log}{fileNameLen}, $filename, $files{log}{funNameLen}, $FunctionName, $files{log}{lineNumLen}, $line);
	print "$header Called from [$caller] at [$callerline] with options [$input_msg]\n"; #only for testing
	if (defined $writelog and defined $LOGFH) {
		$writelog->down();
		print $LOGFH "$header Called from [$caller] at [$callerline] with options [$input_msg]\n";
		$writelog->up();
	}
}