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utils: introduce new macro helpers for tuple, list and dict objects

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Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This commit is contained in:
Pavel Hrdina
2015-09-10 15:05:28 +02:00
parent 706c9dbefe
commit a3f842eea1
1 changed files with 82 additions and 0 deletions
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82
libvirt-utils.h
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@@ -154,6 +154,88 @@ void virFree(void *ptrptr) ATTRIBUTE_NONNULL(1);
#define VIR_PY_INT_SUCCESS (libvirt_intWrap(0)) #define VIR_PY_INT_SUCCESS (libvirt_intWrap(0))
/**
* VIR_PY_TUPLE_SET_GOTO:
* @TUPLE: a pointer to a tuple object
* @INDEX: a position in the tuple object
* @VALUE: a pointer to a python object to add into the tuple
* @GOTO: a label to jump to in case of error
*
* Add the new value to specific place into the python tuple object. In case of
* error it will jump to provided label and DECREF the value to not leak memory.
*/
#define VIR_PY_TUPLE_SET_GOTO(TUPLE, INDEX, VALUE, GOTO) \
do { \
PyObject *tmpVal = VALUE; \
if (!tmpVal || PyTuple_SetItem(TUPLE, INDEX, tmpVal) < 0) \
goto GOTO; \
} while (0)
/**
* VIR_PY_LIST_SET_GOTO:
* @LIST: a pointer to a list object
* @INDEX: a position in the list object
* @VALUE: a pointer to a python object to add into the list
* @GOTO: a label to jump to in case of error
*
* Add the new value to specific place into the python list object. In case of
* error it will jump to provided label and DECREF the value to not leak memory.
*/
#define VIR_PY_LIST_SET_GOTO(LIST, INDEX, VALUE, GOTO) \
do { \
PyObject *tmpVal = VALUE; \
if (!tmpVal || PyList_SetItem(LIST, INDEX, tmpVal) < 0) \
goto GOTO; \
} while (0)
/**
* VIR_PY_LIST_APPEND_GOTO:
* @LIST: a pointer to a python list object
* @VALUE: a pointer to a python object to add into the list
* @GOTO: a label to jump to in case of error
*
* Append the new value into the end of the python list object. In case of
* error it will jump to provided label and DECREF the value to not leak memory.
*/
#define VIR_PY_LIST_APPEND_GOTO(LIST, VALUE, GOTO) \
do { \
PyObject *tmpVal = VALUE; \
if (!tmpVal || PyList_Append(LIST, tmpVal) < 0) { \
Py_XDECREF(tmpVal); \
goto GOTO; \
} \
Py_DECREF(tmpVal); \
} while (0)
/**
* VIR_PY_DICT_SET_GOTO:
* @DICT: a pointer to a python dict object
* @KEY: a pointer to a python string object which will be used as a key
* @VALUE: a pointer to a python object to add into the dict under provided key
* @GOTO: a label to jump to in case of error
*
* Add a new pair of key:value into the python dict object. In case of error it
* will jump to provided label. It will DECREF both key and value in case of
* success or error.
*/
#define VIR_PY_DICT_SET_GOTO(DICT, KEY, VALUE, GOTO) \
do { \
PyObject *tmpKey = KEY; \
PyObject *tmpVal = VALUE; \
if (!tmpKey || !tmpVal || \
PyDict_SetItem(DICT, tmpKey, tmpVal) < 0) { \
Py_XDECREF(tmpKey); \
Py_XDECREF(tmpVal); \
goto GOTO; \
} \
Py_DECREF(tmpKey); \
Py_DECREF(tmpVal); \
} while (0)
/** /**
* VIR_ALLOC: * VIR_ALLOC:
* @ptr: pointer to hold address of allocated memory * @ptr: pointer to hold address of allocated memory