From a4634497c8ada51755249606d8dc4b4c2761c017 Mon Sep 17 00:00:00 2001
From: Pixel <pixel@nobis-crew.org>
Date: Sun, 1 Apr 2012 12:41:16 -0700
Subject: Creating first pass on LuaTasks.

---
 Makefile                    |  2 ++
 includes/LuaTask.h          | 61 +++++++++++++++++++++++++++++++++++++++++++++
 includes/c++11-surrogates.h | 21 ++++++++++++++++
 src/LuaTask.cc              | 46 ++++++++++++++++++++++++++++++++++
 4 files changed, 130 insertions(+)
 create mode 100644 includes/LuaTask.h
 create mode 100644 includes/c++11-surrogates.h
 create mode 100644 src/LuaTask.cc

diff --git a/Makefile b/Makefile
index f12068c..478ff0f 100644
--- a/Makefile
+++ b/Makefile
@@ -140,6 +140,8 @@ SimpleMustache.cc \
 \
 BLua.cc \
 \
+LuaTask.cc \
+\
 BRegex.cc \
 
 ifeq ($(SYSTEM),MINGW32)
diff --git a/includes/LuaTask.h b/includes/LuaTask.h
new file mode 100644
index 0000000..6dff44e
--- /dev/null
+++ b/includes/LuaTask.h
@@ -0,0 +1,61 @@
+#pragma once
+
+#include <c++11-surrogates.h>
+#include <BLua.h>
+#include <Task.h>
+
+namespace Balau {
+
+class LuaTask;
+class LuaMainTask;
+
+class LuaExecCell {
+  public:
+      LuaExecCell() : m_detached(false) { }
+    void detach() { m_detached = true; }
+    void exec(LuaMainTask * mainTask);
+  protected:
+    virtual void run(Lua &) = 0;
+  private:
+    Events::Async m_event;
+    bool m_detached;
+    friend class LuaTask;
+};
+
+class LuaExecString : public LuaExecCell {
+  public:
+      LuaExecString(const String & str) : m_str(str) { }
+  private:
+    virtual void run(Lua &);
+    String m_str;
+};
+
+class LuaTask : public Task {
+  public:
+      ~LuaTask() { L.weaken(); }
+    virtual const char * getName() const { return "LuaTask"; }
+  private:
+      LuaTask(Lua && __L, LuaExecCell * cell) : L(Move(__L)), m_cell(cell) { }
+    virtual void Do();
+    Lua L;
+    LuaExecCell * m_cell;
+    friend class LuaMainTask;
+};
+
+class LuaMainTask : public Task {
+  public:
+      LuaMainTask() : m_stopping(false) { }
+      ~LuaMainTask() { L.close(); }
+    void stop();
+    virtual const char * getName() const { return "LuaMainTask"; }
+  private:
+    void exec(LuaExecCell * cell);
+    virtual void Do();
+    Lua L;
+    Events::Async m_queueEvent;
+    Queue<LuaExecCell> m_queue;
+    bool m_stopping;
+    friend class LuaExecCell;
+};
+
+};
diff --git a/includes/c++11-surrogates.h b/includes/c++11-surrogates.h
new file mode 100644
index 0000000..4f3a1a0
--- /dev/null
+++ b/includes/c++11-surrogates.h
@@ -0,0 +1,21 @@
+#pragma once
+
+namespace Balau {
+
+template <typename T> struct RemoveReference {
+    typedef T type;
+};
+
+template <typename T> struct RemoveReference<T&> {
+    typedef T type;
+};
+
+template <typename T> struct RemoveReference<T&&> {
+    typedef T type;
+};
+
+template <typename T> typename RemoveReference<T>::type&& Move(T&& t) {
+    return static_cast<typename RemoveReference<T>::type&&>(t);
+}
+
+};
diff --git a/src/LuaTask.cc b/src/LuaTask.cc
new file mode 100644
index 0000000..754de6f
--- /dev/null
+++ b/src/LuaTask.cc
@@ -0,0 +1,46 @@
+#include "LuaTask.h"
+#include "Main.h"
+#include "TaskMan.h"
+
+void Balau::LuaMainTask::exec(LuaExecCell * cell) {
+    m_queue.push(cell);
+    m_queueEvent.trigger();
+}
+
+void Balau::LuaMainTask::stop() {
+    Atomic::CmpXChgVal(&m_stopping, true, false);
+    m_queueEvent.trigger();
+}
+
+void Balau::LuaMainTask::Do() {
+    while (!m_stopping) {
+        waitFor(&m_queueEvent);
+
+        LuaExecCell * cell;
+        while ((cell = m_queue.pop(false))) {
+            createTask(new LuaTask(L.thread(), cell));
+        }
+
+        yield();
+    }
+}
+
+void Balau::LuaTask::Do() {
+    m_cell->run(L);
+    if (m_cell->m_detached)
+        delete m_cell;
+    else
+        m_cell->m_event.trigger();
+}
+
+void Balau::LuaExecCell::exec(LuaMainTask * mainTask) {
+    if (!m_detached)
+        Task::prepare(&m_event);
+    mainTask->exec(this);
+    if (!m_detached)
+        Task::yield(&m_event);
+}
+
+void Balau::LuaExecString::run(Lua & L) {
+    L.load(m_str);
+}
-- 
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