* silc_async_abort. Since this use pre-allocated context, the function
* silc_async_free need not be called. This function is equivalent
* to silc_async_alloc except this does not allocate any memory. The `op'
* silc_async_abort. Since this use pre-allocated context, the function
* silc_async_free need not be called. This function is equivalent
* to silc_async_alloc except this does not allocate any memory. The `op'