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POWhy is my Python C Extension leaking memory?
 

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  1. POWhy is my Python C Extension leaking memory?
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    <p>The function below takes a python file handle, reads in packed binary data from the file, creates a Python dictionary and returns it. If I loop it endlessly, it'll continually consume RAM. What's wrong with my RefCounting?</p> <pre><code>static PyObject* __binParse_getDBHeader(PyObject *self, PyObject *args){ PyObject *o; //generic object PyObject* pyDB = NULL; //this has to be a py file object if (!PyArg_ParseTuple(args, "O", &amp;pyDB)){ return NULL; } else { Py_INCREF(pyDB); if (!PyFile_Check(pyDB)){ Py_DECREF(pyDB); PyErr_SetString(PyExc_IOError, "argument 1 must be open file handle"); return NULL; } } FILE *fhDB = PyFile_AsFile(pyDB); long offset = 0; DB_HEADER *pdbHeader = malloc(sizeof(DB_HEADER)); fseek(fhDB,offset,SEEK_SET); //at the beginning fread(pdbHeader, 1, sizeof(DB_HEADER), fhDB ); if (ferror(fhDB)){ fclose(fhDB); Py_DECREF(pyDB); PyErr_SetString(PyExc_IOError, "failed reading database header"); return NULL; } Py_DECREF(pyDB); PyObject *pyDBHeader = PyDict_New(); Py_INCREF(pyDBHeader); o=PyInt_FromLong(pdbHeader-&gt;version_number); PyDict_SetItemString(pyDBHeader, "version", o); Py_DECREF(o); PyObject *pyTimeList = PyList_New(0); Py_INCREF(pyTimeList); int i; for (i=0; i&lt;NUM_DRAWERS; i++){ //epochs o=PyInt_FromLong(pdbHeader-&gt;last_good_test[i]); PyList_Append(pyTimeList, o); Py_DECREF(o); } PyDict_SetItemString(pyDBHeader, "lastTest", pyTimeList); Py_DECREF(pyTimeList); o=PyInt_FromLong(pdbHeader-&gt;temp); PyDict_SetItemString(pyDBHeader, "temp", o); Py_DECREF(o); free(pdbHeader); return (pyDBHeader); } </code></pre> <p>Thanks for taking a look,</p> <p>LarsenMTL</p>
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