// ==========================================================================
// This software is subject to the provisions of the Zope Public License,
// Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
// FOR A PARTICULAR PURPOSE.
// ==========================================================================

using System;
using System.Collections;
using Python.Runtime;

namespace Python.Test {

    //========================================================================
    // Supports CLR threading / reentrancy unit tests.
    //========================================================================

    public class ThreadTest {

        private static PyObject module;

        private static string testmod = 
        "import CLR\n" +
        "from CLR.Python.Test import ThreadTest\n" + 
        "\n" +
        "def echostring(value):\n" + 
        "    return value\n" + 
        "\n" + 
        "def echostring2(value):\n" + 
        "    return ThreadTest.CallEchoString(value)\n" + 
        "\n";


        // This method calls back into the CPython runtime - tests
        // call this from Python to check that we don't hang on 
        // nested transitions from managed to Python code and back.

        public static string CallEchoString(string arg) {
            IntPtr gs = PythonEngine.AcquireLock();
            try {
                if (module == null) {
                    module = PythonEngine.ModuleFromString("tt", testmod);
                }
                PyObject func = module.GetAttr("echostring");
                PyString parg = new PyString(arg);
                PyObject temp = func.Invoke(parg);
                string result = (string)temp.AsManagedObject(typeof(String));
                func.Dispose();
                parg.Dispose();
                temp.Dispose();
                return result;
            }
            finally {
                PythonEngine.ReleaseLock(gs);
            }
        }

        public static string CallEchoString2(string arg) {
            IntPtr gs = PythonEngine.AcquireLock();
            try {
                if (module == null) {
                    module = PythonEngine.ModuleFromString("tt", testmod);
                }

                PyObject func = module.GetAttr("echostring2");
                PyString parg = new PyString(arg);
                PyObject temp = func.Invoke(parg);
                string result = (string)temp.AsManagedObject(typeof(String));
                func.Dispose();
                parg.Dispose();
                temp.Dispose();
                return result;
            }
            finally {
                PythonEngine.ReleaseLock(gs);
            }
        }

        
    }


}