Function alsa_sys::snd_pcm_mmap_begin

pub unsafe extern "C" fn snd_pcm_mmap_begin(
    pcm: *mut snd_pcm_t, 
    areas: *mut *const snd_pcm_channel_area_t, 
    offset: *mut snd_pcm_uframes_t, 
    frames: *mut snd_pcm_uframes_t
) -> c_int