From 13684e6c58ed3f0bd6fd811125e31fc3a37bda21 Mon Sep 17 00:00:00 2001
From: Pixel <pixel@nobis-crew.org>
Date: Thu, 13 Oct 2011 23:52:31 -0700
Subject: Adding a Thread and a Queue class.

---
 Makefile           |  1 +
 includes/Threads.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 src/Threads.cc     | 45 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 95 insertions(+)

diff --git a/Makefile b/Makefile
index 9eb4d53..935a54f 100644
--- a/Makefile
+++ b/Makefile
@@ -148,6 +148,7 @@ TEST_SOURCES = \
 test-Sanity.cc \
 test-String.cc \
 test-Tasks.cc \
+test-Threads.cc \
 test-Handles.cc \
 
 LIB = libBalau.a
diff --git a/includes/Threads.h b/includes/Threads.h
index 5a4ef61..2347a84 100644
--- a/includes/Threads.h
+++ b/includes/Threads.h
@@ -1,9 +1,13 @@
 #pragma once
 
+#include <queue>
 #include <pthread.h>
 
 namespace Balau {
 
+template<class T>
+class Queue;
+
 class Lock {
   public:
       Lock();
@@ -12,6 +16,51 @@ class Lock {
     void leave() { pthread_mutex_unlock(&m_lock); }
   private:
     pthread_mutex_t m_lock;
+    template<class T>
+    friend class Queue;
+};
+
+class ThreadHelper;
+
+class Thread {
+  public:
+      virtual ~Thread();
+    void threadStart();
+    void * join();
+  protected:
+      Thread() : m_joined(false) { }
+    virtual void * proc() = 0;
+  private:
+    pthread_t m_thread;
+    bool m_joined;
+
+    friend class ThreadHelper;
+};
+
+template<class T>
+class Queue {
+  public:
+      Queue() { pthread_cond_init(&m_cond, NULL); }
+      ~Queue() { pthread_cond_destroy(&m_cond); }
+    void push(T & t) {
+        m_lock.enter();
+        m_queue.push(t);
+        pthread_cond_signal(&m_cond);
+        m_lock.leave();
+    }
+    T pop() {
+        m_lock.enter();
+        if (m_queue.size() == 0)
+            pthread_cond_wait(&m_cond, &m_lock.m_lock);
+        T t = m_queue.front();
+        m_queue.pop();
+        m_lock.leave();
+        return t;
+    }
+  private:
+    std::queue<T> m_queue;
+    Lock m_lock;
+    pthread_cond_t m_cond;
 };
 
 };
diff --git a/src/Threads.cc b/src/Threads.cc
index fa3f0f3..5f07040 100644
--- a/src/Threads.cc
+++ b/src/Threads.cc
@@ -1,9 +1,20 @@
 #include "Exceptions.h"
 #include "Threads.h"
+#include "Local.h"
+
+namespace Balau {
+
+class ThreadHelper {
+  public:
+    static void * threadProc(void * arg);
+};
+
+}
 
 Balau::Lock::Lock() {
     int r;
     pthread_mutexattr_t attr;
+
     r = pthread_mutexattr_init(&attr);
     Assert(r == 0);
     r = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
@@ -11,3 +22,37 @@ Balau::Lock::Lock() {
     r = pthread_mutex_init(&m_lock, &attr);
     Assert(r == 0);
 }
+
+void * Balau::ThreadHelper::threadProc(void * arg) {
+    void * tls = g_tlsManager->createTLS();
+    g_tlsManager->setTLS(tls);
+    Balau::Thread * thread = reinterpret_cast<Balau::Thread *>(arg);
+    void * r = thread->proc();
+    free(tls);
+    return r;
+}
+
+Balau::Thread::~Thread() {
+    join();
+}
+
+void * Balau::Thread::join() {
+    void * r = NULL;
+    if (!m_joined) {
+        m_joined = true;
+        pthread_join(m_thread, &r);
+    }
+    return r;
+}
+
+void Balau::Thread::threadStart() {
+    pthread_attr_t attr;
+    int r;
+
+    r = pthread_attr_init(&attr);
+    Assert(r == 0);
+    r = pthread_create(&m_thread, &attr, Balau::ThreadHelper::threadProc, this);
+    Assert(r == 0);
+    r = pthread_attr_destroy(&attr);
+    Assert(r == 0);
+}
-- 
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