Copyright update 2017

Former-commit-id: 8c662c7cb637ae4565e95e661b0e627d9bfd7e5a
Former-commit-id: 4a5279b47f7c8f4fadb62ee6843b3848f803f433

src/net/torvald/terrarum/concurrent/ThreadParallel.kt

@@ -0,0 +1,51 @@
+package net.torvald.terrarum.concurrent
+
+import net.torvald.terrarum.Terrarum
+import java.util.*
+
+/**
+ * Created by minjaesong on 16-05-25.
+ */
+object ThreadPool {
+    val POOL_SIZE = Terrarum.THREADS + 1
+
+    private val pool: Array<Thread?> = Array(POOL_SIZE, { null })
+
+    /**
+     * Map array of Runnable objects to thread pool.
+     * @param prefix : will name each thread as "Foo-1"
+     * @param runnables : vararg
+     */
+    fun mapAll(prefix: String, runnables: Array<Runnable>) {
+        if (runnables.size != POOL_SIZE)
+            throw RuntimeException("Thread pool argument size mismatch. If you have four cores, you must use four runnables.")
+
+        for (i in 0..runnables.size)
+            pool[i] = Thread(runnables[i], "$prefix-$i")
+    }
+
+    /**
+     * Map Runnable object to certain index of the thread pool.
+     * @param index of the runnable
+     * @param runnable
+     * @param prefix Will name each thread like "Foo-1", "Foo-2", etc.
+     */
+    fun map(index: Int, runnable: Runnable, prefix: String) {
+        pool[index] = Thread(runnable, "$prefix-$index")
+    }
+
+    /**
+     * Fill the thread pool with NULL value.
+     */
+    fun purge() {
+        for (i in 0..POOL_SIZE)
+            pool[i] = null
+    }
+
+    /**
+     * Start all thread in the pool. If the thread in the pool is NULL, it will simply ignored.
+     */
+    fun startAll() {
+        pool.forEach { it?.start() }
+    }
+}