From 2e5b2af4d830d36c278983f3e80721e6d7c93c5e Mon Sep 17 00:00:00 2001
From: Mercier Pierre-Olivier <nemunaire@acu.epita.fr>
Date: Fri, 17 Jan 2014 01:52:20 +0100
Subject: [PATCH] Multi-thread grades generation

---
 process/files/intradata_get.pl | 36 +++++++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)

diff --git a/process/files/intradata_get.pl b/process/files/intradata_get.pl
index e68f333..6ca8ca3 100644
--- a/process/files/intradata_get.pl
+++ b/process/files/intradata_get.pl
@@ -2,6 +2,7 @@
 
 use v5.10.1;
 use strict;
+use threads;
 use warnings;
 use Carp;
 use Pod::Usage;
@@ -98,7 +99,38 @@ sub grades_generate
     my @trace_dirs = grep { ( ! /^\./ ) && -d "$basedir/$year/$project_id/traces/$_" } readdir($dh);
     closedir $dh;
 
-    for my $login (@logins)
+    my @ths;
+    my $max_ths = 4;
+    my $login_by_threads = @logins / $max_ths;
+
+    for (my $i = 0; $i < $max_ths; $i++)
+    {
+	my @partlogin = @logins[($i*$login_by_threads) .. (($i+1)*$login_by_threads - 1)];
+	push @ths, threads->create(\&do_grade_generation, $grading, $year, $project_id, $groups, \@trace_dirs, @partlogin);
+    }
+
+    if ($login_by_threads * $max_ths < @logins)
+    {
+	my @partlogin = @logins[$login_by_threads * $max_ths .. $#logins];
+	push @ths, threads->create(\&do_grade_generation, $grading, $year, $project_id, $groups, \@trace_dirs, @partlogin);
+    }
+
+    for my $th (@ths) {
+	$th->join();
+    }
+
+    return 1;
+}
+
+sub do_grade_generation
+{
+    my $grading = shift;
+    my $year = shift;
+    my $project_id = shift;
+    my $groups = shift;
+    my @trace_dirs = @{ shift() };
+
+    for my $login (@_)
     {
 	my @files;
 
@@ -157,8 +189,6 @@ sub grades_generate
 
 	$grading->reset();
     }
-
-    return 1;
 }
 
 sub grades_new_bonus