search for: buf_user_data

...nor for Python). In OCaml we need to free the GC root, but that is separate from the buffer pointer. The generated code for an OCaml persistent buffers eventually looks like this: /* The function may save a reference to the Buffer, so we * must treat it as a possible GC root. */ value *buf_user_data; buf_user_data = malloc (sizeof (value)); if (buf_user_data == NULL) caml_raise_out_of_memory (); *buf_user_data = bufv; caml_register_generational_global_root (buf_user_data); struct nbd_buffer *buf_buf = NBD_buffer_val (bufv); const void *buf = buf_buf->data; size_t count = buf_b...

On 8/12/19 11:08 AM, Richard W.M. Jones wrote: > This adds a C-only semi-private function for freeing various types of > persistent data passed to libnbd. > > There are some similarities with nbd_add_close_callback which we > removed in commit 7f191b150b52ed50098976309a6af883d245fc56. > --- > +=head1 FREE CALLBACKS > + > +B<Note:> The API described in this

...e GC root, but that is separate from the buffer > pointer. > > The generated code for an OCaml persistent buffers eventually looks > like this: > > /* The function may save a reference to the Buffer, so we > * must treat it as a possible GC root. > */ > value *buf_user_data; > buf_user_data = malloc (sizeof (value)); > if (buf_user_data == NULL) caml_raise_out_of_memory (); > *buf_user_data = bufv; > caml_register_generational_global_root (buf_user_data); > struct nbd_buffer *buf_buf = NBD_buffer_val (bufv); > const void *buf = buf_buf-&g...