tiny.memtrace.CensusCapacity

1pub const Capacity = struct {2    categories: usize,3    table_slots: usize,4    table_bytes: usize,5    table_offset: usize,6    summary_entries: usize,7    summary_bytes: usize,8    summary_offset: usize,9    label_bytes: usize,10    label_offset: usize,11    joined_label_bytes: usize,12    joined_label_offset: usize,13    storage_bytes: usize,1415    pub fn derive(limits: Limits) DeriveError!Capacity {16        if (limits.categories == 0) return error.CategoryCapacityTooSmall;17        if (limits.label_bytes == 0) return error.LabelStorageTooSmall;1819        const doubled_categories = try multiplied(limits.categories, 2);20        const table_slots = std.math.ceilPowerOfTwo(usize, doubled_categories) catch21            return error.CapacityOverflow;22        const table = try placed(model.Slot, 0, table_slots);23        const summary = try placed(model.Entry, table.end, limits.categories);24        const label_offset = summary.end;25        const joined_label_offset = try added(label_offset, limits.label_bytes);26        const storage_bytes = try added(joined_label_offset, limits.joined_label_bytes);2728        return .{29            .categories = limits.categories,30            .table_slots = table_slots,31            .table_bytes = table.bytes,32            .table_offset = table.start,33            .summary_entries = limits.categories,34            .summary_bytes = summary.bytes,35            .summary_offset = summary.start,36            .label_bytes = limits.label_bytes,37            .label_offset = label_offset,38            .joined_label_bytes = limits.joined_label_bytes,39            .joined_label_offset = joined_label_offset,40            .storage_bytes = storage_bytes,41        };42    }43};

1pub const CensusCapacity = census_mod.Capacity;