Windows Python extension docs.

samples/python_extension/README.md

@@ -3,16 +3,17 @@
 This example shows how to use Kotlin/Native programs from other execution environments, such as Python.
 Python has C native interface, which could be used to organize a bridge with the
 Kotlin/Native application. File `kotlin_bridge.c` contains translation code between Kotlin and Python
-lands.
+lands. This demo works on Linux, Windows (64-bit) or macOS hosts.
 
 To build and run the sample do the following:
 
-*   Install Python with development headers, i.e.
+*   Install Python with development headers, i.e. on Linux
     ```
     sudo apt install python-dev
     ```
 
-*   Run `build.sh`, it will ask for superuser password to install Python extension
+*   Run `build.sh`, it will ask for superuser password to install Python extension.
+    Use build.bat on Windows.
 *   On macOS copy Kotlin binary to extension's directory and change install name with
     `install_name_tool` tool, i.e.
     ```
@@ -39,7 +40,7 @@ To build and run the sample do the following:
 
  The example works as following. Kotlin/Native API is implemented in `Server.kt`, and we run Kotlin/Native compiler
  with `-produce dynamic` option. Compiler produces two artifacts: `server_api.h` which is C language API
- to all public functions and classes available in the application. `libserver.dylib` or `libserver.so`
+ to all public functions and classes available in the application. `libserver.dylib` or `libserver.so` or `server.dll`
  shared object contains C bridge to all above APIs.
 
   This C bridge looks like a C struct, reflecting all scopes in program, with operations available. For example,

samples/python_extension/build.bat

@@ -0,0 +1,16 @@
+setlocal
+set DIR=.
+
+if defined KONAN_HOME (
+    set "PATH=%KONAN_HOME%\bin;%PATH%"
+) else (
+    set "PATH=..\..\dist\bin;..\..\bin;%PATH%"
+)
+konanc -p dynamic src/main/kotlin/Server.kt -o server
+
+rem Prepare MSVC build environment, and .lib file for linking with our .dll.
+SET VS90COMNTOOLS=%VS140COMNTOOLS%
+\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\lib.exe" /def:server.def /out:server.lib  /machine:X64
+
+python src/main/python/setup.py install
+ 

samples/python_extension/src/main/c/kotlin_bridge.c

@@ -23,7 +23,13 @@
 
 // Note, that as we cache this in the global, and Kotlin/Native object references
 // are currently thread local, we make this global a TLS variable.
-static __thread server_kref_demo_Server server = { 0 };
+#ifdef _MSC_VER
+#define TLSVAR __declspec(thread)
+#else
+#define TLSVAR __thread
+#endif
+
+static TLSVAR server_kref_demo_Server server = { 0 };
 
 static T_(Server) getServer(void) {
   if (!server.pinned) {
@@ -32,7 +38,7 @@ static T_(Server) getServer(void) {
   return server;
 }
 
-static server_kref_demo_Session getSession(PyObject* args) {
+static T_(Session) getSession(PyObject* args) {
    T_(Session) result = { 0 };
    long long pinned;
    if (PyArg_ParseTuple(args, "L", &pinned)) {
@@ -46,7 +52,7 @@ static PyObject* open_session(PyObject* self, PyObject* args) {
     char* string_arg = NULL;
     int int_arg = 0;
     if (PyArg_ParseTuple(args, "is", &int_arg, &string_arg)) {
-        server_kref_demo_Session session = __ kotlin.demo.Session.Session(string_arg, int_arg);
+        T_(Session) session = __ kotlin.demo.Session.Session(string_arg, int_arg);
         result = Py_BuildValue("L", session.pinned);
     }
     return result;