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atproto relay in zig zlay.waow.tech
relay zig atproto
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Zig
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293const std = @import("std");const zio = @import("zio");const zat = @import("zat");const index = @import("internal/collection_index/index.zig");const Io = std.Io;const Probe = struct { ci: *index.CollectionIndex, io: Io, heartbeat_at: i96 = 0, outcome: anyerror!bool = false, write_outcome: anyerror!void = {}, write_at: i96 = 0, fn heartbeat(self: *Probe) void { Io.sleep(self.io, .fromMilliseconds(10), .awake) catch return; self.heartbeat_at = Io.Clock.awake.now(self.io).nanoseconds; } fn read(self: *Probe) void { self.outcome = self.readPage(); } fn readPage(self: *Probe) !bool { var bytes: [4096]u8 = undefined; var spans: [100]index.Span = undefined; const page = try self.ci.listReposByCollection("app.bsky.feed.post", 100, null, &bytes, &spans); if (page.count == 0) return false; return std.mem.eql(u8, page.getDid(0), "did:plc:alice"); } fn write(self: *Probe) void { self.write_outcome = self.writeFrame(); self.write_at = Io.Clock.awake.now(self.io).nanoseconds; } fn writeFrame(self: *Probe) !void { const path = try std.heap.c_allocator.dupe(u8, "app.bsky.feed.post/record"); defer std.heap.c_allocator.free(path); const ops: zat.cbor.Value = .{ .array = &.{.{ .map = &.{ .{ .key = "action", .value = .{ .text = "create" } }, .{ .key = "path", .value = .{ .text = path } }, } }} }; try self.ci.trackCommitOps("did:plc:bob", ops); }};const Gate = struct { ci: *index.CollectionIndex, threaded: Io, held: Io.Event = .unset, fn run(self: *Gate) void { self.ci.read_mutex.lockUncancelable(self.ci.read_io); self.held.set(self.threaded); Io.sleep(self.threaded, .fromMilliseconds(200), .awake) catch unreachable; self.ci.read_mutex.unlock(self.ci.read_io); }};pub fn main(init: std.process.Init) !void { const args = try init.minimal.args.toSlice(init.arena.allocator()); if (args.len != 2) return error.ExpectedScratchPath; const runtime = try zio.Runtime.init(init.gpa, .{ .executors = .exact(1) }); defer runtime.deinit(); const io = runtime.io(); var output = Io.File.stdout().writer(init.io, &.{}); try output.interface.writeAll("reader_io,hold_ms,heartbeat_ms,write_ack_ms\n"); for (0..3) |mode| { const path = try std.fmt.allocPrint(init.arena.allocator(), "{s}/{d}", .{ args[1], mode }); var ci = try index.CollectionIndex.openWithReaderIo(init.gpa, init.io, if (mode == 0) init.io else io, path); defer ci.deinit(); if (mode == 2) try ci.enablePageWorker(2); try ci.addCollection("did:plc:alice", "app.bsky.feed.post"); try ci.enableBatching(.{}); var gate: Gate = .{ .ci = &ci, .threaded = init.io }; const releaser = try std.Thread.spawn(.{}, Gate.run, .{&gate}); gate.held.waitUncancelable(init.io); var joined = false; defer if (!joined) releaser.join(); var probe: Probe = .{ .ci = &ci, .io = io }; const start = Io.Clock.awake.now(io).nanoseconds; var group: Io.Group = .init; defer group.cancel(io); try group.concurrent(io, Probe.heartbeat, .{&probe}); try group.concurrent(io, Probe.read, .{&probe}); try group.concurrent(io, Probe.write, .{&probe}); try group.await(io); releaser.join(); joined = true; if (!(try probe.outcome)) return error.MissingAcknowledgedPair; try probe.write_outcome; if (!(try ci.hasCollectionsChecked("did:plc:bob"))) return error.MissingOwnedFrame; const write_ms = @divTrunc(probe.write_at - start, 1_000_000); const elapsed_ms = @divTrunc(probe.heartbeat_at - start, 1_000_000); try output.interface.print("{s},200,{d},{d}\n", .{ if (mode == 0) "threaded" else if (mode == 1) "zio" else "page-worker", elapsed_ms, write_ms }); if (mode == 0 and elapsed_ms < 150) return error.ControlDidNotBlock; if (mode != 0 and write_ms >= 100) return error.WriterBlockedByReader; if (mode != 0 and elapsed_ms >= 100) return error.ExecutorBlocked; }}