tiny.arrange.Scratch

1pub const Scratch = struct {2    results: []LayoutResult,3    results_used: usize = 0,4    metrics: []flow.ChildMetrics,5    metrics_used: usize = 0,6    lines: []flow.Line,7    lines_used: usize = 0,8    states: []NodeState,9    states_used: usize = 0,10    child_indices: []ChildIndex,11    child_indices_used: usize = 0,12    indexed_cache: []IndexedCacheSlot = &.{},13    cache_epoch: u32 = 0,14    work: Work = .{},15    size_cache_enabled: bool = true,1617    pub fn reset(self: *Scratch) void {18        self.results_used = 0;19        self.metrics_used = 0;20        self.lines_used = 0;21        self.resetSolve();22    }2324    fn resetSolve(self: *Scratch) void {25        self.states_used = 0;26        self.child_indices_used = 0;27        self.work = .{};28        std.debug.assert(self.indexed_cache.len <= std.math.maxInt(u32));29        const clear_start = std.math.maxInt(u32) - @as(u32, @intCast(self.indexed_cache.len));30        if (self.cache_epoch >= clear_start and self.cache_epoch < std.math.maxInt(u32)) {31            const clear_index: usize = @intCast(self.cache_epoch - clear_start);32            self.indexed_cache[clear_index].epoch = 0;33        }34        self.cache_epoch +%= 1;35        if (self.cache_epoch == 0) self.cache_epoch = 1;36    }3738    fn mark(self: *const Scratch) ScratchMark {39        return .{40            .metrics = self.metrics_used,41            .lines = self.lines_used,42        };43    }4445    fn release(self: *Scratch, point: ScratchMark) void {46        self.metrics_used = point.metrics;47        self.lines_used = point.lines;48    }4950    fn carveResults(self: *Scratch, count: usize) []LayoutResult {51        std.debug.assert(self.results_used + count <= self.results.len);52        const span = self.results[self.results_used..][0..count];53        self.results_used += count;54        return span;55    }5657    fn carveMetrics(self: *Scratch, count: usize) []flow.ChildMetrics {58        std.debug.assert(self.metrics_used + count <= self.metrics.len);59        const span = self.metrics[self.metrics_used..][0..count];60        self.metrics_used += count;61        return span;62    }6364    fn carveLines(self: *Scratch, count: usize) []flow.Line {65        std.debug.assert(self.lines_used + count <= self.lines.len);66        const span = self.lines[self.lines_used..][0..count];67        self.lines_used += count;68        return span;69    }70};

1pub const Scratch = compute.Scratch;