1 files changed, 80 insertions, 0 deletions
diff --git a/source/Core/InputReaderStack.cpp b/source/Core/InputReaderStack.cpp
new file mode 100644
index 0000000..764ea26
--- /dev/null
+++ b/source/Core/InputReaderStack.cpp
@@ -0,0 +1,80 @@
+//===-- InputReaderStack.cpp ------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Core/InputReaderStack.h"
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+
+
+using namespace lldb;
+using namespace lldb_private;
+
+InputReaderStack::InputReaderStack () :
+    m_input_readers (),
+    m_input_readers_mutex (Mutex::eMutexTypeRecursive)
+{
+}
+
+InputReaderStack::~InputReaderStack ()
+{
+}
+
+size_t
+InputReaderStack::GetSize () const
+{
+    Mutex::Locker locker (m_input_readers_mutex);
+    return m_input_readers.size();
+}
+    
+void
+InputReaderStack::Push (const lldb::InputReaderSP& reader_sp)
+{
+    if (reader_sp)
+    {
+        Mutex::Locker locker (m_input_readers_mutex);
+        m_input_readers.push (reader_sp);
+    }
+}
+    
+bool
+InputReaderStack::IsEmpty () const
+{
+    Mutex::Locker locker (m_input_readers_mutex);
+    return m_input_readers.empty();
+}
+    
+InputReaderSP
+InputReaderStack::Top ()
+{
+    InputReaderSP input_reader_sp;
+    {
+        Mutex::Locker locker (m_input_readers_mutex);
+        if (!m_input_readers.empty())
+            input_reader_sp = m_input_readers.top();
+    }
+        
+    return input_reader_sp;
+}
+    
+void
+InputReaderStack::Pop ()
+{
+    Mutex::Locker locker (m_input_readers_mutex);
+    if (!m_input_readers.empty())
+        m_input_readers.pop();
+}
+    
+Mutex &
+InputReaderStack::GetStackMutex ()
+{
+    return m_input_readers_mutex;
+}