PythonKeepAlive.cpp

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/*******************************************************************************
 * Name     : PythonKeepAlive.cpp
 *
 * Author   : Himanshu Jain <hjain@perforce.com>
 *
 * Description  : C++ subclass for KeepAlive used by Python KeepAlive.
 *                Allows Perforce API to implement a customized IsAlive function
 *
 * $Id: //depot/main/p4-python/PythonKeepAlive.cpp#1 $
 *
 ******************************************************************************/

#include <Python.h>
#include <keepalive.h>
#include "PythonThreadGuard.h"
#include "PythonKeepAlive.h"

PythonKeepAlive::PythonKeepAlive(PyObject* callable) : py_callable(callable) {
    // Increment the reference count for the callable
    Py_XINCREF(py_callable);
}

PythonKeepAlive::~PythonKeepAlive() {
    // Decrement the reference count for the callable
    Py_XDECREF(py_callable);
}

int PythonKeepAlive::IsAlive() {

    EnsurePythonLock guard;

    if (py_callable && PyCallable_Check(py_callable)) {
        PyObject* result = PyObject_CallObject(py_callable, NULL);
        if (result != NULL && PyLong_Check(result) && PyLong_AsLong(result) == 0) {
            Py_DECREF(result);
            return( 0 ); // To terminate the connection
        }
        
        return( 1 );
    }

    return( 1 ); // Default to true if callable is not set or failed
}