.TH "al_register_assert_handler(3alleg5) Allegro reference manual" "" "" "" "" .SH NAME .PP al_register_assert_handler \- Allegro 5 API .SH SYNOPSIS .IP .nf \f[C] #include\ void\ al_register_assert_handler(void\ (*handler)(char\ const\ *expr, \ \ \ char\ const\ *file,\ int\ line,\ char\ const\ *func)) \f[] .fi .SH DESCRIPTION .PP Register a function to be called when an internal Allegro assertion fails. Pass NULL to reset to the default behaviour, which is to do whatever the standard \f[C]assert()\f[] macro does. .SH SINCE .PP 5.0.6, 5.1.0