Function PLy_global_args_pop

src/pl/plpython/plpy_exec.c:646–677

* Pop old arguments when exiting a recursive call. * * Note: the idea here is to adjust the proc's callstack state before doing * anything that could possibly fail. In event of any error, we want the * callstack to look like we've done the pop. Leaking a bit of memory is * tolerable. */

 * tolerable.
 */
static void
PLy_global_args_pop(PLyProcedure *proc)
{
	Assert(proc->calldepth > 0);
	/* We only need to pop if we were already inside some active call */
	if (proc->calldepth > 1)
	{
		PLySavedArgs *ptr = proc->argstack;

		/* Pop the callstack */
		Assert(ptr != NULL);
		proc->argstack = ptr->next;
		proc->calldepth--;

		/* Restore argument values, then free ptr */
		PLy_function_restore_args(proc, ptr);
	}
	else
	{
		/* Exiting call depth 1 */
		Assert(proc->argstack == NULL);
		proc->calldepth--;

		/*
		 * We used to delete the named arguments (but not "args") from the
		 * proc's globals dict when exiting the outermost call level for a
		 * function.  This seems rather pointless though: nothing can see the
		 * dict until the function is called again, at which time we'll
		 * overwrite those dict entries.  So don't bother with that.
		 */
	}
}

/*
 * Memory context deletion callback for cleaning up a PLySRFState.