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Re: [libvirt] [PATCH 4/7] qemu_api: Add override XML and C files for QEMU APIs



On Fri, Sep 09, 2011 at 07:24:44PM +0800, Osier Yang wrote:
> There is only one function (virDomainQemuMonitorCommand) need to
> be hand-craft.
> ---
>  python/libvirt-qemu-override-api.xml |   12 +++
>  python/libvirt-qemu-override.c       |  136 ++++++++++++++++++++++++++++++++++
>  2 files changed, 148 insertions(+), 0 deletions(-)
>  create mode 100644 python/libvirt-qemu-override-api.xml
>  create mode 100644 python/libvirt-qemu-override.c
> 
> diff --git a/python/libvirt-qemu-override-api.xml b/python/libvirt-qemu-override-api.xml
> new file mode 100644
> index 0000000..d69acea
> --- /dev/null
> +++ b/python/libvirt-qemu-override-api.xml
> @@ -0,0 +1,12 @@
> +<?xml version="1.0"?>
> +<api name='libvir-qemu-python'>
> +  <symbols>
> +      <function name='virDomainQemuMonitorCommand' file='python-qemu'>
> +        <info>Send an arbitrary monitor command through qemu monitor of domain</info>
> +        <return type='str *' info='the command output or None in case of error'/>
> +        <arg name='domain' type='virDomainPtr' info='pointer to domain object'/>
> +        <arg name='cmd' type='const char *' info='the command which will be passed to QEMU monitor'/>
> +        <arg name='flags' type='unsigned int' info='an OR&apos;ed set of virDomainQemuMonitorCommandFlags'/>
> +      </function>
> +  </symbols>
> +</api>
> diff --git a/python/libvirt-qemu-override.c b/python/libvirt-qemu-override.c
> new file mode 100644
> index 0000000..485c809
> --- /dev/null
> +++ b/python/libvirt-qemu-override.c
> @@ -0,0 +1,136 @@
> +/*
> + * libvir.c: this modules implements the main part of the glue of the
> + *           libvir library and the Python interpreter. It provides the
> + *           entry points where an automatically generated stub is
> + *           unpractical
> + *
> + * Copyright (C) 2011 Red Hat, Inc.
> + *
> + * Daniel Veillard <veillard redhat com>
> + */
> +
> +#include <config.h>
> +
> +/* Horrible kludge to work around even more horrible name-space pollution
> +   via Python.h.  That file includes /usr/include/python2.5/pyconfig*.h,
> +   which has over 180 autoconf-style HAVE_* definitions.  Shame on them.  */
> +#undef HAVE_PTHREAD_H
> +
> +#include <Python.h>
> +#include "libvirt/libvirt-qemu.h"
> +#include "libvirt/virterror.h"
> +#include "typewrappers.h"
> +#include "libvirt-qemu.h"
> +
> +#ifndef __CYGWIN__
> +extern void initlibvirtmod_qemu(void);
> +#else
> +extern void initcygvirtmod_qemu(void);
> +#endif
> +
> +#if 0
> +# define DEBUG_ERROR 1
> +#endif
> +
> +#if DEBUG_ERROR
> +# define DEBUG(fmt, ...)            \
> +   printf(fmt, __VA_ARGS__)
> +#else
> +# define DEBUG(fmt, ...)            \
> +   do {} while (0)
> +#endif
> +
> +/* The two-statement sequence "Py_INCREF(Py_None); return Py_None;"
> +   is so common that we encapsulate it here.  Now, each use is simply
> +   return VIR_PY_NONE;  */
> +#define VIR_PY_NONE (Py_INCREF (Py_None), Py_None)
> +#define VIR_PY_INT_FAIL (libvirt_intWrap(-1))
> +#define VIR_PY_INT_SUCCESS (libvirt_intWrap(0))
> +
> +/* We don't want to free() returned value. As written in doc:
> + * PyString_AsString returns pointer to 'internal buffer of string,
> + * not a copy' and 'It must not be deallocated'. */
> +static char *py_str(PyObject *obj)
> +{
> +    PyObject *str = PyObject_Str(obj);
> +    if (!str) {
> +        PyErr_Print();
> +        PyErr_Clear();
> +        return NULL;
> +    };
> +    return PyString_AsString(str);
> +}
> +
> +/************************************************************************
> + *									*
> + *		Statistics						*
> + *									*
> + ************************************************************************/
> +
> +static PyObject *
> +libvirt_qemu_virDomainQemuMonitorCommand(PyObject *self ATTRIBUTE_UNUSED,
> +                                    PyObject *args) {
> +    PyObject *py_retval;
> +    char *result = NULL;
> +    virDomainPtr domain;
> +    PyObject *pyobj_domain;
> +    unsigned int flags;
> +    char *cmd;
> +    int c_retval;
> +
> +    if (!PyArg_ParseTuple(args, (char *)"Ozi:virDomainQemuMonitorCommand",
> +                          &pyobj_domain, &cmd, &flags))
> +        return(NULL);
> +    domain = (virDomainPtr) PyvirDomain_Get(pyobj_domain);
> +
> +    if (domain == NULL)
> +        return VIR_PY_NONE;
> +    LIBVIRT_BEGIN_ALLOW_THREADS;
> +    c_retval = virDomainQemuMonitorCommand(domain, cmd, &result, flags);
> +    LIBVIRT_END_ALLOW_THREADS;
> +
> +    if (c_retval < 0)
> +        return VIR_PY_NONE;
> +
> +    py_retval = PyString_FromString(result);
> +    return(py_retval);
> +}
> +
> +/************************************************************************
> + *									*
> + *			The registration stuff				*
> + *									*
> + ************************************************************************/
> +static PyMethodDef libvirtQemuMethods[] = {
> +#include "libvirt-qemu-export.c"
> +    {(char *) "virDomainQemuMonitorCommand", libvirt_qemu_virDomainQemuMonitorCommand, METH_VARARGS, NULL},
> +    {NULL, NULL, 0, NULL}
> +};
> +
> +void
> +#ifndef __CYGWIN__
> +initlibvirtmod_qemu
> +#else
> +initcygvirtmod_qemu
> +#endif
> +  (void)
> +{
> +    static int initialized = 0;
> +
> +    if (initialized != 0)
> +        return;
> +
> +    if (virInitialize() < 0)
> +        return;
> +
> +    /* initialize the python extension module */
> +    Py_InitModule((char *)
> +#ifndef __CYGWIN__
> +                  "libvirtmod_qemu"
> +#else
> +                  "cygvirtmod_qemu"
> +#endif
> +                  , libvirtQemuMethods);
> +
> +    initialized = 1;
> +}

  ACK,

Daniel

-- 
Daniel Veillard      | libxml Gnome XML XSLT toolkit  http://xmlsoft.org/
daniel veillard com  | Rpmfind RPM search engine http://rpmfind.net/
http://veillard.com/ | virtualization library  http://libvirt.org/


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