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MINOR: hlua_fcn: add Patref:giveup()

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If Patref:commit() was used and the new version (generation) isn't going
to be committed, calling Patref:giveup() will allow allocated resources
to be freed and reused. It is a good habit to call this if commit()
isn't called after a prepare().
This commit is contained in:
Aurelien DARRAGON 2024-11-25 15:29:40 +01:00
parent fda5ca3472
commit 3bcc653ce1
2 changed files with 29 additions and 1 deletions
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7
doc/lua-api/index.rst
View File

@ -3478,7 +3478,12 @@ Patref class
:returns: true on success and nil on failure (followed by an error message).
See :js:func:`Patref.prepare()`
See :js:func:`Patref.prepare()` and :js:func:`Patref.giveup()`
.. js:function:: Patref.giveup(ref)
Drop the pending patref version created using Patref:prepare(): get back to
live dataset.
.. _applethttp_class:

23
src/hlua_fcn.c
View File

@ -2694,6 +2694,28 @@ int hlua_patref_commit(lua_State *L)
return _hlua_patref_clear(L, LUA_OK, 0);
}
int hlua_patref_giveup(lua_State *L)
{
struct hlua_patref *ref;
ref = hlua_checkudata(L, 1, class_patref_ref);
BUG_ON(!ref);
if (!(ref->flags & HLUA_PATREF_FL_GEN)) {
/* nothing to do */
return 0;
}
lua_pushinteger(L, ref->curr_gen); // from
lua_pushinteger(L, ref->curr_gen); // to
_hlua_patref_clear(L, LUA_OK, 0);
/* didn't make use of the generation ID, give it back to the API */
pat_ref_giveup(ref->ptr, ref->curr_gen);
return 0;
}
int hlua_patref_prepare(lua_State *L)
{
struct hlua_patref *ref;
@ -2746,6 +2768,7 @@ void hlua_fcn_new_patref(lua_State *L, struct pat_ref *ref)
hlua_class_function(L, "is_map", hlua_patref_is_map);
hlua_class_function(L, "prepare", hlua_patref_prepare);
hlua_class_function(L, "commit", hlua_patref_commit);
hlua_class_function(L, "giveup", hlua_patref_giveup);
hlua_class_function(L, "purge", hlua_patref_purge);
}