man LOCK_VARIABLE () - Locks the memory of a variable used by a timer. Allegro game programming library.
NAME
LOCK_VARIABLE - Locks the memory of a variable used by a timer. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
Macro LOCK_VARIABLE(variable_name);
DESCRIPTION
Due to interrupts, you are required to lock all the memory used by your timer routines. See the description of install_int_ex() for a more detailed explanation and usage example.