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mmapmodule: Use SetFileInformationByHandle instead of SetFilePointerEx

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This trades two windows syscalls with one.
This commit is contained in:
AZero13 2025-12-07 23:37:42 -05:00
parent 7099af8f5e
commit cec855dd98
1 changed files with 6 additions and 3 deletions
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9
Modules/mmapmodule.c
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@ -906,9 +906,12 @@ mmap_mmap_resize_impl(mmap_object *self, Py_ssize_t new_size)
};
self->data = NULL;
/* resize the file */
if (!SetFilePointerEx(self->file_handle, max_size, NULL,
FILE_BEGIN) ||
!SetEndOfFile(self->file_handle)) {
FILE_END_OF_FILE_INFO info;
info.EndOfFile = max_size;
if (!SetFileInformationByHandle(self->file_handle,
FileEndOfFileInfo,
&info,
sizeof(info))) {
/* resizing failed. try to remap the file */
file_resize_error = GetLastError();
max_size.QuadPart = self->size;