update xs_transaction_t to be a plain u32 integer instead of a fake pointer.

Signed-off-by: Vincent Hanquez <vincent@xensource.com>

tools/python/xen/lowlevel/xs/xs.c

@@ -132,7 +132,7 @@ static PyObject *xspy_write(XsHandle *self, PyObject *args)
     if (!PyArg_ParseTuple(args, arg_spec, &thstr, &path, &data, &data_n))
         return NULL;
 
-    th = (xs_transaction_t)strtoul(thstr, NULL, 16);
+    th = strtoul(thstr, NULL, 16);
 
     Py_BEGIN_ALLOW_THREADS
     result = xs_write(xh, th, path, data, data_n);
@@ -264,7 +264,7 @@ static PyObject *xspy_get_permissions(XsHandle *self, PyObject *args)
     if (!PyArg_ParseTuple(args, arg_spec, &thstr, &path))
         return NULL;
 
-    th = (xs_transaction_t)strtoul(thstr, NULL, 16);
+    th = strtoul(thstr, NULL, 16);
 
     Py_BEGIN_ALLOW_THREADS
     perms = xs_get_permissions(xh, th, path, &perms_n);
@@ -320,7 +320,7 @@ static PyObject *xspy_set_permissions(XsHandle *self, PyObject *args)
     if (!PyArg_ParseTuple(args, "ssO", &thstr, &path, &perms))
         goto exit;
 
-    th = (xs_transaction_t)strtoul(thstr, NULL, 16);
+    th = strtoul(thstr, NULL, 16);
 
     if (!PyList_Check(perms)) {
         PyErr_SetString(PyExc_RuntimeError, "perms must be a list");
@@ -519,7 +519,7 @@ static PyObject *xspy_transaction_start(XsHandle *self)
     th = xs_transaction_start(xh);
     Py_END_ALLOW_THREADS
 
-    if (th == NULL) {
+    if (th == XBT_NULL) {
         PyErr_SetFromErrno(PyExc_RuntimeError);
         return NULL;
     }
@@ -556,7 +556,7 @@ static PyObject *xspy_transaction_end(XsHandle *self, PyObject *args,
                                      &thstr, &abort))
         return NULL;
 
-    th = (xs_transaction_t)strtoul(thstr, NULL, 16);
+    th = strtoul(thstr, NULL, 16);
 
     Py_BEGIN_ALLOW_THREADS
     result = xs_transaction_end(xh, th, abort);
@@ -740,7 +740,7 @@ static int parse_transaction_path(XsHandle *self, PyObject *args,
     if (!PyArg_ParseTuple(args, "ss", &thstr, path))
         return 0;
 
-    *th = (xs_transaction_t)strtoul(thstr, NULL, 16);
+    *th = strtoul(thstr, NULL, 16);
 
     return 1;
 }