ffi_callback

NAME

ffi_callback() - expose an LPC function to C as a callback

SYNOPSIS

int ffi_callback( function fn, int ret_type, int *arg_types );

DESCRIPTION

Wraps the LPC function pointer `fn` in a libffi closure with the
given return and argument type codes (from <ffi.h>), and returns a
callback handle. Pass ffi_callback_addr() of that handle to C as an
FFI_POINTER argument so a C library (a comparator for qsort(), an
event handler, ...) can call back into LPC.

Gated by the master apply valid_ffi("callback", 0, caller).

SEE ALSO

ffi_callback_addr(3), ffi_callback_free(3), ffi_call(3), valid_ffi(4)