python shell

#include <io.h>
#include <fcntl.h>
#include <windows.h>
#include <stdio.h>

typedef int (__stdcall *PY_ISINITIALIZED)();
typedef int (__stdcall *PYRUN_SIMPLESTRING)(const char *str);
typedef DWORD* (__stdcall *PYGILSTATE_ENSURE)();
typedef void (__stdcall *PYGILSTATE_RELEASE)(DWORD *gstate);

PY_ISINITIALIZED Py_IsInitialized;
PYRUN_SIMPLESTRING PyRun_SimpleString;
PYGILSTATE_ENSURE PyGILState_Ensure;
PYGILSTATE_RELEASE PyGILState_Release;

HMODULE hModule;

void init()
{
    // get python
    hModule = GetModuleHandle("python27.dll");
    Py_IsInitialized    = (PY_ISINITIALIZED)    GetProcAddress(hModule, "Py_IsInitialized");
    PyGILState_Ensure   = (PYGILSTATE_ENSURE)   GetProcAddress(hModule, "PyGILState_Ensure");
    PyGILState_Release  = (PYGILSTATE_RELEASE)  GetProcAddress(hModule, "PyGILState_Release");
    PyRun_SimpleString  = (PYRUN_SIMPLESTRING)  GetProcAddress(hModule, "PyRun_SimpleString");

    // make a console
    AllocConsole();

    freopen("CONOUT$", "w", stdout);
    freopen("CONERR$", "w", stderr);
    freopen("CONIN$", "r", stdin);
    
    setvbuf(stdout, NULL, _IONBF, 0);
    setvbuf(stderr, NULL, _IONBF, 0);
    
    // display debug info
    printf("PyGILState_Ensure:  %X\n", (unsigned int)PyGILState_Ensure);
    printf("PyGILState_Release: %X\n", (unsigned int)PyGILState_Release);
    printf("PyRun_SimpleString: %X\n", (unsigned int)PyRun_SimpleString);
    printf("Py_IsInitialized:   %X\n", (unsigned int)Py_IsInitialized);
    printf("\n");
}

DWORD WINAPI shell_thread(LPVOID lpParam)
{
    while(!Py_IsInitialized())
        Sleep(100);
    
    DWORD *gstate = PyGILState_Ensure();
    
    PyRun_SimpleString("import sys");
    PyRun_SimpleString("import code");
    PyRun_SimpleString("import blue");
    PyRun_SimpleString("code.interact(local=locals())");
    
    PyGILState_Release(gstate);
    
    // fallback
    while(true)
    {
      printf("thread dead\n");
      Sleep(10000);
    }
}

BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
    switch (fdwReason)
    {
        case DLL_PROCESS_ATTACH:
            init();
            CreateThread(
              0,                      // default security attributes
              0,                      // use default stack size
              shell_thread,           // thread function name
              0,                      // argument to thread function
              0,                      // use default creation flags
              0                       // returns the thread identifier
            );
            break;

        case DLL_PROCESS_DETACH:
            break;

        case DLL_THREAD_ATTACH:
            break;

        case DLL_THREAD_DETACH:
            break;
    }
    return TRUE;
}