An extension module to call eventfd(2) in python

linux.c

/*
 * Usage in python:
 *
 *   import linux
 *   efd = linux.eventfd(0, 0)
 *   ...
 *   ret = struct.unpack('Q', os.read(efd, 8))
 *   ...
 *   linux.close(efd)
 */
#include <Python.h>
#include <unistd.h>
#include <sys/eventfd.h>

static PyObject *
linux_eventfd(PyObject *self, PyObject *args)
{
	int efd, initval, flags;

	if (!PyArg_ParseTuple(args, "ii", &initval, &flags))
		return NULL;
	efd = eventfd(initval, flags);
        if (efd == -1) {
                return PyErr_SetFromErrno(PyExc_OSError);
        } else {
	        return Py_BuildValue("i", efd);
        }
}

static PyObject *
linux_close(PyObject *self, PyObject *args)
{
	int ret, fd;

	if (!PyArg_ParseTuple(args, "i", &fd))
		return NULL;
	ret = close(fd);
        if (ret == -1) {
                return PyErr_SetFromErrno(PyExc_OSError);
        } else {
	        return Py_BuildValue("i", ret);
        }
}

static PyMethodDef LinuxSyscalls[] = {
	{"eventfd",  linux_eventfd, METH_VARARGS,
		"Execute eventfd syscall."},
	{"close",  linux_close, METH_VARARGS,
		"Execute close syscall."},
	{NULL, NULL, 0, NULL}
};

PyMODINIT_FUNC
initlinux(void)
{
	(void) Py_InitModule("linux", LinuxSyscalls);
}

/*
int
main(int argc, char *argv[])
{
	Py_SetProgramName(argv[0]);
	Py_Initialize();
	initlinux();
}
*/