ilusha/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2026-09-29 12:10:30 +03:00
Code Issues Projects Releases Packages Wiki Activity Actions

gh-91247: Use memcpy for list and tuple repeat (#91482)

Browse source 
* Add _Py_memory_repeat function to pycore_list

* Add _Py_RefcntAdd function to pycore_object

* Use the new functions in tuplerepeat, list_repeat, and list_inplace_repeat
This commit is contained in:
Pieter Eendebak 2022-07-26 04:10:23 +02:00 • committed by GitHub
parent 27055d766a
commit 2ef73be891
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 73 additions and 65 deletions
Download patch file Download diff file Expand all files Collapse all files

13
Include/internal/pycore_list.h
View file

@ -56,6 +56,19 @@ _PyList_AppendTakeRef(PyListObject *self, PyObject *newitem)
return _PyList_AppendTakeRefListResize(self, newitem);
}
// Repeat the bytes of a buffer in place
static inline void
_Py_memory_repeat(char* dest, Py_ssize_t len_dest, Py_ssize_t len_src)
{
assert(len_src > 0);
Py_ssize_t copied = len_src;
while (copied < len_dest) {
Py_ssize_t bytes_to_copy = Py_MIN(copied, len_dest - copied);
memcpy(dest + copied, dest, bytes_to_copy);
copied += bytes_to_copy;
}
}
typedef struct {
PyObject_HEAD
Py_ssize_t it_index;

10
Include/internal/pycore_object.h
View file

@ -37,6 +37,16 @@ PyAPI_FUNC(void) _Py_NO_RETURN _Py_FatalRefcountErrorFunc(
#define _Py_FatalRefcountError(message) \
_Py_FatalRefcountErrorFunc(__func__, (message))
// Increment reference count by n
static inline void _Py_RefcntAdd(PyObject* op, Py_ssize_t n)
{
#ifdef Py_REF_DEBUG
_Py_RefTotal += n;
#endif
op->ob_refcnt += n;
}
#define _Py_RefcntAdd(op, n) _Py_RefcntAdd(_PyObject_CAST(op), n)
static inline void
_Py_DECREF_SPECIALIZED(PyObject *op, const destructor destruct)
{