(* libguestfs
- * Copyright (C) 2009-2010 Red Hat Inc.
+ * Copyright (C) 2009-2011 Red Hat Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
open Generator_actions
open Generator_structs
open Generator_c
+open Generator_events
(* Generate Python C module. *)
let rec generate_python_c () =
generate_header CStyle LGPLv2plus;
pr "\
-#define PY_SSIZE_T_CLEAN 1
-#include <Python.h>
-
-#if PY_VERSION_HEX < 0x02050000
-typedef int Py_ssize_t;
-#define PY_SSIZE_T_MAX INT_MAX
-#define PY_SSIZE_T_MIN INT_MIN
-#endif
-
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
-#include \"guestfs.h\"
-
-#ifndef HAVE_PYCAPSULE_NEW
-typedef struct {
- PyObject_HEAD
- guestfs_h *g;
-} Pyguestfs_Object;
-#endif
-
-static guestfs_h *
-get_handle (PyObject *obj)
-{
- assert (obj);
- assert (obj != Py_None);
-#ifndef HAVE_PYCAPSULE_NEW
- return ((Pyguestfs_Object *) obj)->g;
-#else
- return (guestfs_h*) PyCapsule_GetPointer(obj, \"guestfs_h\");
-#endif
-}
-
-static PyObject *
-put_handle (guestfs_h *g)
-{
- assert (g);
-#ifndef HAVE_PYCAPSULE_NEW
- return
- PyCObject_FromVoidPtrAndDesc ((void *) g, (char *) \"guestfs_h\", NULL);
-#else
- return PyCapsule_New ((void *) g, \"guestfs_h\", NULL);
-#endif
-}
+#include \"guestfs-py.h\"
/* This list should be freed (but not the strings) after use. */
static char **
free (argv);
}
-static PyObject *
-py_guestfs_create (PyObject *self, PyObject *args)
-{
- guestfs_h *g;
-
- g = guestfs_create ();
- if (g == NULL) {
- PyErr_SetString (PyExc_RuntimeError,
- \"guestfs.create: failed to allocate handle\");
- return NULL;
- }
- guestfs_set_error_handler (g, NULL, NULL);
- /* This can return NULL, but in that case put_handle will have
- * set the Python error string.
- */
- return put_handle (g);
-}
-
-static PyObject *
-py_guestfs_close (PyObject *self, PyObject *args)
-{
- PyObject *py_g;
- guestfs_h *g;
-
- if (!PyArg_ParseTuple (args, (char *) \"O:guestfs_close\", &py_g))
- return NULL;
- g = get_handle (py_g);
-
- guestfs_close (g);
-
- Py_INCREF (Py_None);
- return Py_None;
-}
-
";
let emit_put_list_function typ =
pr "py_guestfs_%s (PyObject *self, PyObject *args)\n" name;
pr "{\n";
+ pr " PyThreadState *py_save = NULL;\n";
pr " PyObject *py_g;\n";
pr " guestfs_h *g;\n";
pr " PyObject *py_r;\n";
pr " struct guestfs_%s_argv *optargs = &optargs_s;\n" name;
);
- let error_code =
- match ret with
- | RErr | RInt _ | RBool _ -> pr " int r;\n"; "-1"
- | RInt64 _ -> pr " int64_t r;\n"; "-1"
- | RConstString _ | RConstOptString _ ->
- pr " const char *r;\n"; "NULL"
- | RString _ -> pr " char *r;\n"; "NULL"
- | RStringList _ | RHashtable _ -> pr " char **r;\n"; "NULL"
- | RStruct (_, typ) -> pr " struct guestfs_%s *r;\n" typ; "NULL"
- | RStructList (_, typ) ->
- pr " struct guestfs_%s_list *r;\n" typ; "NULL"
- | RBufferOut _ ->
- pr " char *r;\n";
- pr " size_t size;\n";
- "NULL" in
+ (match ret with
+ | RErr | RInt _ | RBool _ -> pr " int r;\n"
+ | RInt64 _ -> pr " int64_t r;\n"
+ | RConstString _ | RConstOptString _ ->
+ pr " const char *r;\n"
+ | RString _ -> pr " char *r;\n"
+ | RStringList _ | RHashtable _ -> pr " char **r;\n"
+ | RStruct (_, typ) -> pr " struct guestfs_%s *r;\n" typ
+ | RStructList (_, typ) ->
+ pr " struct guestfs_%s_list *r;\n" typ
+ | RBufferOut _ ->
+ pr " char *r;\n";
+ pr " size_t size;\n"
+ );
List.iter (
function
pr "\n"
);
+ (* Release Python GIL while running. This code is from
+ * libvirt/python/typewrappers.h. Thanks to Dan Berrange for
+ * showing us how to do this properly.
+ *)
+ pr " if (PyEval_ThreadsInitialized ())\n";
+ pr " py_save = PyEval_SaveThread ();\n";
+ pr "\n";
+
if optargs = [] then
pr " r = guestfs_%s " name
else
generate_c_call_args ~handle:"g" style;
pr ";\n";
+ pr "\n";
+ pr " if (PyEval_ThreadsInitialized ())\n";
+ pr " PyEval_RestoreThread (py_save);\n";
+ pr "\n";
+
List.iter (
function
| Pathname _ | Device _ | Dev_or_Path _ | String _ | Key _
pr " free (%s);\n" n
) args;
- pr " if (r == %s) {\n" error_code;
- pr " PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));\n";
- pr " return NULL;\n";
- pr " }\n";
+ (match errcode_of_ret ret with
+ | `CannotReturnError -> ()
+ | `ErrorIsMinusOne ->
+ pr " if (r == -1) {\n";
+ pr " PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));\n";
+ pr " return NULL;\n";
+ pr " }\n"
+ | `ErrorIsNULL ->
+ pr " if (r == NULL) {\n";
+ pr " PyErr_SetString (PyExc_RuntimeError, guestfs_last_error (g));\n";
+ pr " return NULL;\n";
+ pr " }\n"
+ );
pr "\n";
(match ret with
pr "static PyMethodDef methods[] = {\n";
pr " { (char *) \"create\", py_guestfs_create, METH_VARARGS, NULL },\n";
pr " { (char *) \"close\", py_guestfs_close, METH_VARARGS, NULL },\n";
+ pr " { (char *) \"set_event_callback\",\n";
+ pr " py_guestfs_set_event_callback, METH_VARARGS, NULL },\n";
+ pr " { (char *) \"delete_event_callback\",\n";
+ pr " py_guestfs_delete_event_callback, METH_VARARGS, NULL },\n";
List.iter (
fun (name, _, _, _, _, _, _) ->
pr " { (char *) \"%s\", py_guestfs_%s, METH_VARARGS, NULL },\n"
import libguestfsmod
+";
+
+ List.iter (
+ fun (name, bitmask) ->
+ pr "EVENT_%s = 0x%x\n" (String.uppercase name) bitmask
+ ) events;
+ pr "\n";
+
+ pr "\
+class ClosedHandle(ValueError):
+ pass
+
class GuestFS:
\"\"\"Instances of this class are libguestfs API handles.\"\"\"
self._o = libguestfsmod.create ()
def __del__ (self):
+ if self._o:
+ libguestfsmod.close (self._o)
+
+ def _check_not_closed (self):
+ if not self._o:
+ raise ClosedHandle (\"GuestFS: method called on closed handle\")
+
+ def close (self):
+ u\"\"\"Explicitly close the guestfs handle.
+
+ The handle is closed implicitly when its reference count goes
+ to zero (eg. when it goes out of scope or the program ends).
+
+ This call is only needed if you want to force the handle to
+ close now. After calling this, the program must not call
+ any method on the handle (except the implicit call to
+ __del__ which happens when the final reference is cleaned up).
+ \"\"\"
+ self._check_not_closed ()
libguestfsmod.close (self._o)
+ self._o = None
+
+ def set_event_callback (self, cb, event_bitmask):
+ u\"\"\"Register an event callback.
+
+ Register \"cb\" as a callback function for all of the
+ events in \"event_bitmask\". \"event_bitmask\" should be
+ one or more \"guestfs.EVENT_*\" flags logically or'd together.
+
+ This function returns an event handle which can be used
+ to delete the callback (see \"delete_event_callback\").
+
+ The callback function receives 4 parameters:
+
+ cb (event, event_handle, buf, array)
+
+ \"event\" is one of the \"EVENT_*\" flags. \"buf\" is a
+ message buffer (only for some types of events). \"array\"
+ is an array of integers (only for some types of events).
+
+ You should read the documentation for
+ \"guestfs_set_event_callback\" in guestfs(3) before using
+ this function.
+ \"\"\"
+ self._check_not_closed ()
+ return libguestfsmod.set_event_callback (self._o, cb, event_bitmask)
+
+ def delete_event_callback (self, event_handle):
+ u\"\"\"Delete an event callback.\"\"\"
+ self._check_not_closed ()
+ libguestfsmod.delete_event_callback (self._o, event_handle)
";
let doc = String.concat "\n " doc in
pr " u\"\"\"%s\"\"\"\n" doc;
);
+ (* Callers might pass in iterables instead of plain lists;
+ * convert those to plain lists because the C side of things
+ * cannot deal with iterables. (RHBZ#693306).
+ *)
+ List.iter (
+ function
+ | Pathname _ | Device _ | Dev_or_Path _ | String _ | Key _
+ | FileIn _ | FileOut _ | OptString _ | Bool _ | Int _ | Int64 _
+ | BufferIn _ | Pointer _ -> ()
+ | StringList n | DeviceList n ->
+ pr " %s = list (%s)\n" n n
+ ) args;
+ pr " self._check_not_closed ()\n";
pr " return libguestfsmod.%s (self._o" name;
List.iter (fun arg -> pr ", %s" (name_of_argt arg)) (args@optargs);
pr ")\n\n";
git.annexia.org / libguestfs.git / blobdiff