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Python: Init container owner attribute in thread-safe way

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This commit is contained in:
Jake Cobb 2019-01-23 15:12:45 -05:00
commit 5185ce67b5
1 changed files with 11 additions and 3 deletions
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14
Lib/python/pycontainer.swg
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@ -36,8 +36,17 @@
%include <std_except.i>
%fragment("reference_container_owner", "header") {
%fragment("container_owner_attribute_init", "init") {
// thread safe initialization
swig::container_owner_attribute();
}
%fragment("reference_container_owner", "header", fragment="container_owner_attribute_init") {
namespace swig {
PyObject* container_owner_attribute() {
static PyObject* attr = SWIG_Python_str_FromChar("__owner");
return attr;
}
/**
* Call to add a back-reference to the owning object when returning a
* reference from a container. Will only set the reference if <code>child</code>
@ -46,10 +55,9 @@ namespace swig {
* @return if the reference was set or not
*/
bool reference_container_owner(PyObject* child, PyObject* owner) {
static PyObject* attr = SWIG_Python_str_FromChar("__owner");
SwigPyObject* swigThis = SWIG_Python_GetSwigThis(child);
if (swigThis && (swigThis->own & SWIG_POINTER_OWN) != SWIG_POINTER_OWN) {
PyObject_SetAttr(child, attr, owner);
PyObject_SetAttr(child, container_owner_attribute(), owner);
return true;
}
return false;