module memory

pub type FnAllocatorAlloc = fn (size usize, user_data voidptr) voidptr

pub type FnAllocatorFree = fn (ptr voidptr, user_data voidptr)

pub type FnLogCb = fn (const_tag &char, log_level u32, log_item_id u32, const_message_or_null &char, line_nr u32, const_filename_or_null &char, user_data voidptr)

// salloc - used in the allocator structs, that the SOKOL libraries use, for allocating new memory blocks
pub fn salloc(size usize, user_data voidptr) voidptr {
    res := unsafe { malloc(int(size)) }
    $if trace_sokol_memory ? {
        eprintln('sokol.memory.salloc | user_data: ${user_data:x} | size: ${size:10} | res: ${res:x}')
    }
    $if trace_sokol_memory_salloc_backtrace ? {
        print_backtrace()
    }
    return res
}

// sfree - used in the allocator structs, that the SOKOL libraries use, for freeing memory
pub fn sfree(ptr voidptr, user_data voidptr) {
    $if trace_sokol_memory ? {
        eprintln(' sokol.memory.sfree | user_data: ${user_data:x} |                    ptr: ${ptr:x}')
    }
    $if trace_sokol_memory_sfree_backtrace ? {
        print_backtrace()
    }
    unsafe { free(ptr) }
}

fn C.SOKOL_LOG(const_message &char)

pub fn slog(const_tag &char, log_level u32, log_item_id u32, const_message_or_null &char, line_nr u32,
    const_filename_or_null &char, user_data voidptr) {
    C.fprintf(C.stderr,
        c'sokol.memory.slog | user_data: %p, const_tag: %s, level: %d, item_id: %d, fname: %s, line: %d, message: %s\n',
        user_data, const_tag, log_level, log_item_id, const_filename_or_null, line_nr,
        const_message_or_null)
}