diff options
Diffstat (limited to 'Include/object.h')
| -rw-r--r-- | Include/object.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/Include/object.h b/Include/object.h index f718509..243de29 100644 --- a/Include/object.h +++ b/Include/object.h @@ -514,6 +514,53 @@ it carefully, it may save lots of calls to Py_INCREF() and Py_DECREF() at times. */ +/* + trashcan + CT 2k0130 + non-recursively destroy nested objects + + CT 2k0223 + redefinition for better locality and less overhead. + + Objects that want to be recursion safe need to use + the macroes + Py_TRASHCAN_SAFE_BEGIN(name) + and + Py_TRASHCAN_SAFE_END(name) + surrounding their actual deallocation code. + + It would be nice to do this using the thread state. + Also, we could do an exact stack measure then. + Unfortunately, deallocations also take place when + the thread state is undefined. +*/ + +#define PyTrash_UNWIND_LEVEL 50 + +#define Py_TRASHCAN_SAFE_BEGIN(op) \ + { \ + ++_PyTrash_delete_nesting; \ + if (_PyTrash_delete_nesting < PyTrash_UNWIND_LEVEL) { \ + +#define Py_TRASHCAN_SAFE_END(op) \ + ;} \ + else \ + _PyTrash_deposit_object((PyObject*)op);\ + --_PyTrash_delete_nesting; \ + if (_PyTrash_delete_later && _PyTrash_delete_nesting <= 0) \ + _PyTrash_destroy_list(); \ + } \ + +extern DL_IMPORT(void) _PyTrash_deposit_object Py_PROTO((PyObject*)); +extern DL_IMPORT(void) _PyTrash_destroy_list Py_PROTO(()); + +extern DL_IMPORT(int) _PyTrash_delete_nesting; +extern DL_IMPORT(PyObject *) _PyTrash_delete_later; + +/* swap the "xx" to check the speed loss */ + +#define xxPy_TRASHCAN_SAFE_BEGIN(op) +#define xxPy_TRASHCAN_SAFE_END(op) ; #ifdef __cplusplus } #endif |