libvirt-qemu-override.c

   1 /*
   2  * libvir.c: this modules implements the main part of the glue of the
   3  *           libvir library and the Python interpreter. It provides the
   4  *           entry points where an automatically generated stub is
   5  *           unpractical
   6  *
   7  * Copyright (C) 2011 Red Hat, Inc.
   8  *
   9  * Daniel Veillard <veillard@redhat.com>
  10  */
  11
  12 #include <config.h>
  13
  14 /* Horrible kludge to work around even more horrible name-space pollution
  15    via Python.h.  That file includes /usr/include/python2.5/pyconfig*.h,
  16    which has over 180 autoconf-style HAVE_* definitions.  Shame on them.  */
  17 #undef HAVE_PTHREAD_H
  18
  19 #include <Python.h>
  20 #include "libvirt/libvirt-qemu.h"
  21 #include "libvirt/virterror.h"
  22 #include "typewrappers.h"
  23 #include "libvirt-qemu.h"
  24
  25 #ifndef __CYGWIN__
  26 extern void initlibvirtmod_qemu(void);
  27 #else
  28 extern void initcygvirtmod_qemu(void);
  29 #endif
  30
  31 #if 0
  32 # define DEBUG_ERROR 1
  33 #endif
  34
  35 #if DEBUG_ERROR
  36 # define DEBUG(fmt, ...)            \
  37    printf(fmt, __VA_ARGS__)
  38 #else
  39 # define DEBUG(fmt, ...)            \
  40    do {} while (0)
  41 #endif
  42
  43 /* The two-statement sequence "Py_INCREF(Py_None); return Py_None;"
  44    is so common that we encapsulate it here.  Now, each use is simply
  45    return VIR_PY_NONE;  */
  46 #define VIR_PY_NONE (Py_INCREF (Py_None), Py_None)
  47 #define VIR_PY_INT_FAIL (libvirt_intWrap(-1))
  48 #define VIR_PY_INT_SUCCESS (libvirt_intWrap(0))
  49
  50 /* We don't want to free() returned value. As written in doc:
  51  * PyString_AsString returns pointer to 'internal buffer of string,
  52  * not a copy' and 'It must not be deallocated'. */
  53 static char *py_str(PyObject *obj)
  54 {
  55     PyObject *str = PyObject_Str(obj);
  56     if (!str) {
  57         PyErr_Print();
  58         PyErr_Clear();
  59         return NULL;
  60     };
  61     return PyString_AsString(str);
  62 }
  63
  64 /************************************************************************
  65  *                                                                      *
  66  *              Statistics                                              *
  67  *                                                                      *
  68  ************************************************************************/
  69
  70 static PyObject *
  71 libvirt_qemu_virDomainQemuMonitorCommand(PyObject *self ATTRIBUTE_UNUSED,
  72                                     PyObject *args) {
  73     PyObject *py_retval;
  74     char *result = NULL;
  75     virDomainPtr domain;
  76     PyObject *pyobj_domain;
  77     unsigned int flags;
  78     char *cmd;
  79     int c_retval;
  80
  81     if (!PyArg_ParseTuple(args, (char *)"Ozi:virDomainQemuMonitorCommand",
  82                           &pyobj_domain, &cmd, &flags))
  83         return(NULL);
  84     domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
  85
  86     if (domain == NULL)
  87         return VIR_PY_NONE;
  88     LIBVIRT_BEGIN_ALLOW_THREADS;
  89     c_retval = virDomainQemuMonitorCommand(domain, cmd, &result, flags);
  90     LIBVIRT_END_ALLOW_THREADS;
  91
  92     if (c_retval < 0)
  93         return VIR_PY_NONE;
  94
  95     py_retval = PyString_FromString(result);
  96     return(py_retval);
  97 }
  98
  99 /************************************************************************
 100  *                                                                      *
 101  *                      The registration stuff                          *
 102  *                                                                      *
 103  ************************************************************************/
 104 static PyMethodDef libvirtQemuMethods[] = {
 105 #include "libvirt-qemu-export.c"
 106     {(char *) "virDomainQemuMonitorCommand", libvirt_qemu_virDomainQemuMonitorCommand, METH_VARARGS, NULL},
 107     {NULL, NULL, 0, NULL}
 108 };
 109
 110 void
 111 #ifndef __CYGWIN__
 112 initlibvirtmod_qemu
 113 #else
 114 initcygvirtmod_qemu
 115 #endif
 116   (void)
 117 {
 118     static int initialized = 0;
 119
 120     if (initialized != 0)
 121         return;
 122
 123     if (virInitialize() < 0)
 124         return;
 125
 126     /* initialize the python extension module */
 127     Py_InitModule((char *)
 128 #ifndef __CYGWIN__
 129                   "libvirtmod_qemu"
 130 #else
 131                   "cygvirtmod_qemu"
 132 #endif
 133                   , libvirtQemuMethods);
 134
 135     initialized = 1;
 136 }