php man page for lock_function

LOCK_FUNCTION(3alleg4)						  Allegro manual					    LOCK_FUNCTION(3alleg4)

NAME
       LOCK_FUNCTION - Locks the memory of a function used by a timer. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       Macro LOCK_FUNCTION(function_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.

SEE ALSO
       install_int(3alleg4), install_int_ex(3alleg4), exkeys(3alleg4), exscn3d(3alleg4), exsprite(3alleg4),  exswitch(3alleg4),  extimer(3alleg4),
       exupdate(3alleg4), exzbuf(3alleg4)

Allegro 							   version 4.4.2					    LOCK_FUNCTION(3alleg4)