Function mupdf_sys::fz_store_scavenge_external

pub unsafe extern "C" fn fz_store_scavenge_external(
    ctx: *mut fz_context, 
    size: usize, 
    phase: *mut c_int
) -> c_int

External function for callers to use to scavenge while trying allocations.

size: The number of bytes we are trying to have free.

phase: What phase of the scavenge we are in. Updated on exit.

Returns non zero if we managed to free any memory.