.TH "ALLEGRO_MUTEX(3alleg5) Allegro reference manual" "" "" "" "" .SH NAME .PP ALLEGRO_MUTEX \- Allegro 5 API .SH SYNOPSIS .IP .nf \f[C] #include\ typedef\ struct\ ALLEGRO_MUTEX\ ALLEGRO_MUTEX; \f[] .fi .SH DESCRIPTION .PP An opaque structure representing a mutex.