Extending via C++, adding a module throws exception

[Chrisber]

Of course. I commented the SDK_OnLoad function.

Syntax: Select all

static int numargs = 0;

static PyObject* pawnbridge_numargs(PyObject *self, PyObject *args)
{
	if (!PyArg_ParseTuple(args, ":numargs"))
		return NULL;
	return PyLong_FromLong(numargs);
}

static PyMethodDef PawnBridgeMethods[] = {
		{ "numargs", pawnbridge_numargs, METH_VARARGS,
		"Return the number of arguments received by the process." },
		{ NULL, NULL, 0, NULL }
};

static PyModuleDef PawnBridgeModule = {
	PyModuleDef_HEAD_INIT, "pawnbridge", NULL, -1, PawnBridgeMethods,
	NULL, NULL, NULL, NULL
};

PyMODINIT_FUNC PyInit_pawnbridge(void)
{
	return PyModule_Create(&PawnBridgeModule);
}



/**
* @brief This is called after the initial loading sequence has been processed.
*
* @param error		Error message buffer.
* @param maxlength	Size of error message buffer.
* @param late		Whether or not the module was loaded after map load.
* @return			True to succeed loading, false to fail.
*/
bool PawnBridge::SDK_OnLoad(char *error, size_t maxlength, bool late)
{
	numargs = 42;

	// also doesn't work when I uncomment it
	//PyImport_AddModule("pawnbridge");

	// test to make sure that dll is loaded; return value is a valid handle (also works when commenting out)
	smutils->LogMessage(myself, "LoadLibrary: %d", LoadLibrary("D:\\C++\\Source\\SrcDS\\games\\css\\cstrike\\addons\\source-python\\Python3\\plat-win\\python34.dll"));
	
	// try to add the dll to the sys.path, no effect
	PyRun_SimpleString("sys.path.insert(1, r'D:\\C++\\Source\\SrcDS\\games\\css\\cstrike\\addons\\sourcemod\\extensions')");
	
	// print out a simple thing. works.
	PyRun_SimpleString("print('lolxd')");

	// works. includes also source-python paths
	PyRun_SimpleString("print(str(sys.path))");
	
	// try again to add the path. no effect
	std::wstring x = Py_GetPath();
	x += L";D:\\C++\\Source\\SrcDS\\games\\css\\cstrike\\addons\\sourcemod\\extensions";
	Py_SetPath(x.c_str());

	// try using this, out of documentation. when removing this, "no module named pawnbridge" appears, otherwise "pawnbridge is no built-in module"
	smutils->LogMessage(myself, "PyImport_AppendInittab: %d", PyImport_AppendInittab("pawnbridge", &PyInit_pawnbridge));

	// try additionally to call the init func manually, no effect
	PyModule_Create(&PawnBridgeModule);

	// try to import it inside the dll itself. fails.
	PyImport_ImportModule("pawnbridge");

	// initialize
	Py_Initialize();
	
	// try to output something with source-python. works
	PyRun_SimpleString("from core import echo_console; echo_console('loltest');");

	return true;
}

Test script:

Syntax: Select all

import pawnbridge
from core import echo_console

print(dir(pawnbridge))

echo_console('This is a test: {:d}'.format(pawnbridge.numargs()))

[Ayuto]

You really confuse me! I thought you were using Boost.Python now?!

Try this:

Syntax: Select all

char const* greet()
{
	return "hello, world";
}

void PyInit_pawnbridge()
{
	using namespace boost::python;
	def("greet", greet);
}

bool PawnBridge::SDK_OnLoad(char *error, size_t maxlength, bool late)
{
    // Create a new empty module
    object newmodule(borrowed(PyImport_AddModule("pawnbridge")));
    
    // Set it as the current scope
    scope moduleScope = newmodule;
    
    // Initialize the module
    PyInit_pawnbridge()
    
    return true;
}

[Chrisber]

Hi, sorry! boost.python didn't even get contact to Source.Pythons python instance. So I firstly tried to use the plain API.
Holy sh........ it works.
Time of life wasted: four hours.

Thank you...

[Ayuto]

No, that's not wasted time. That's four hours of new expirience.