Re: [libvirt-python PATCH 13/23] Use VIR_PY_NONE instead

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in the subject "instead of Py_None"

and perhaps a few more details in the commit message regarding what's
being done and why


On 09/24/2015 10:01 AM, Pavel Hrdina wrote:
> Signed-off-by: Pavel Hrdina <phrdina@xxxxxxxxxx>
> ---
>  libvirt-override.c |  9 +++------
>  typewrappers.c     | 54 ++++++++++++++++++------------------------------------
>  2 files changed, 21 insertions(+), 42 deletions(-)
> 
> diff --git a/libvirt-override.c b/libvirt-override.c
> index d2279de..4d0fb92 100644
> --- a/libvirt-override.c
> +++ b/libvirt-override.c
> @@ -1960,7 +1960,6 @@ virConnectCredCallbackWrapper(virConnectCredentialPtr cred,
>      for (i = 0; i < ncred; i++) {
>          PyObject *pycreditem;
>          pycreditem = PyList_New(5);
> -        Py_INCREF(Py_None);

I'm curious as to why it was done before and why it's OK to remove it.
The others mostly make sense - this functions usage is, well, odd

John
>          PyTuple_SetItem(pycred, i, pycreditem);
>          PyList_SetItem(pycreditem, 0, libvirt_intWrap((long) cred[i].type));
>          PyList_SetItem(pycreditem, 1, libvirt_constcharPtrWrap(cred[i].prompt));
> @@ -1968,17 +1967,15 @@ virConnectCredCallbackWrapper(virConnectCredentialPtr cred,
>              PyList_SetItem(pycreditem, 2,
>                             libvirt_constcharPtrWrap(cred[i].challenge));
>          } else {
> -            Py_INCREF(Py_None);
> -            PyList_SetItem(pycreditem, 2, Py_None);
> +            PyList_SetItem(pycreditem, 2, VIR_PY_NONE);
>          }
>          if (cred[i].defresult) {
>              PyList_SetItem(pycreditem, 3,
>                             libvirt_constcharPtrWrap(cred[i].defresult));
>          } else {
> -            Py_INCREF(Py_None);
> -            PyList_SetItem(pycreditem, 3, Py_None);
> +            PyList_SetItem(pycreditem, 3, VIR_PY_NONE);
>          }
> -        PyList_SetItem(pycreditem, 4, Py_None);
> +        PyList_SetItem(pycreditem, 4, VIR_PY_NONE);
>      }
>  
>      PyTuple_SetItem(list, 0, pycred);
> diff --git a/typewrappers.c b/typewrappers.c
> index 6507e0f..246f8af 100644
> --- a/typewrappers.c
> +++ b/typewrappers.c
> @@ -97,8 +97,7 @@ libvirt_charPtrSizeWrap(char *str, Py_ssize_t size)
>      PyObject *ret;
>  
>      if (str == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  #if PY_MAJOR_VERSION > 2
>      ret = PyBytes_FromStringAndSize(str, size);
> @@ -114,8 +113,7 @@ libvirt_charPtrWrap(char *str)
>      PyObject *ret;
>  
>      if (str == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  #if PY_MAJOR_VERSION > 2
>      ret = PyUnicode_FromString(str);
> @@ -131,8 +129,7 @@ libvirt_constcharPtrWrap(const char *str)
>      PyObject *ret;
>  
>      if (str == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  #if PY_MAJOR_VERSION > 2
>      ret = PyUnicode_FromString(str);
> @@ -420,8 +417,7 @@ libvirt_virDomainPtrWrap(virDomainPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virDomainPtr", NULL);
> @@ -434,8 +430,7 @@ libvirt_virNetworkPtrWrap(virNetworkPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virNetworkPtr", NULL);
> @@ -448,8 +443,7 @@ libvirt_virInterfacePtrWrap(virInterfacePtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virInterfacePtr", NULL);
> @@ -462,8 +456,7 @@ libvirt_virStoragePoolPtrWrap(virStoragePoolPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virStoragePoolPtr", NULL);
> @@ -476,8 +469,7 @@ libvirt_virStorageVolPtrWrap(virStorageVolPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virStorageVolPtr", NULL);
> @@ -490,8 +482,7 @@ libvirt_virConnectPtrWrap(virConnectPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virConnectPtr", NULL);
> @@ -504,8 +495,7 @@ libvirt_virNodeDevicePtrWrap(virNodeDevicePtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virNodeDevicePtr", NULL);
> @@ -518,8 +508,7 @@ libvirt_virSecretPtrWrap(virSecretPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virSecretPtr", NULL);
> @@ -532,8 +521,7 @@ libvirt_virNWFilterPtrWrap(virNWFilterPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virNWFilterPtr", NULL);
> @@ -546,8 +534,7 @@ libvirt_virStreamPtrWrap(virStreamPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virStreamPtr", NULL);
> @@ -560,8 +547,7 @@ libvirt_virDomainSnapshotPtrWrap(virDomainSnapshotPtr node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virDomainSnapshotPtr", NULL);
> @@ -574,9 +560,8 @@ libvirt_virEventHandleCallbackWrap(virEventHandleCallback node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
>          printf("%s: WARNING - Wrapping None\n", __func__);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virEventHandleCallback", NULL);
> @@ -590,8 +575,7 @@ libvirt_virEventTimeoutCallbackWrap(virEventTimeoutCallback node)
>  
>      if (node == NULL) {
>          printf("%s: WARNING - Wrapping None\n", __func__);
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virEventTimeoutCallback", NULL);
> @@ -604,8 +588,7 @@ libvirt_virFreeCallbackWrap(virFreeCallback node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "virFreeCallback", NULL);
> @@ -618,8 +601,7 @@ libvirt_virVoidPtrWrap(void* node)
>      PyObject *ret;
>  
>      if (node == NULL) {
> -        Py_INCREF(Py_None);
> -        return Py_None;
> +        return VIR_PY_NONE;
>      }
>  
>      ret = libvirt_buildPyObject(node, "void*", NULL);
> 

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