╭─────────────╮ │scroll to top│ ╰─────────────╯ ╭ event.zig ────────────────────────────────────────────────────╮ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ │ ╰───────────────────────────────────────────────────────────────╯
🬐 🬠 🬞🬂🬏 🬟 🬑 🬟 🬑 ╭0c669d48..╮ 0c669d48.. see-em: 🬋🬋🬋 🬋🬋🬋 🬋 🬋 │files │ commits refs discuss issues new login 🬐 🬠 🬐 🬠 🬑 🬟 🬰 ╰──────────╯ (589) user
╭────╮ ╭ clone ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╮ │http│ ssh │ │ ╰────╯ ╰ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ╯
.. embed/ event/ test/ ui/ command.zig diff3.zig ╭─────────────────────────────────╮ │event.zig │ ╰─────────────────────────────────╯ find.zig fork.zig lib.zig main.zig main_wasm.zig markdown.zig patch.zig progress.zig push.zig search.zig search_commit.zig search_thread.zig serve.zig serve_common.zig serve_http.zig serve_ssh.zig serve_ssh_protocol.zig test.zig testnet.zig try.zig ui.zig web.zig
2050 // tracking pending parents is necessary because a child can only 2051 // be returned after all of its unconsumed parents have been returned 2052 child_to_pending_parents: TempDB.HashMap(.read_write), 2053 // queue of object ids that are ready to be returned from `next` 2054 ready_queue: TempDB.ArrayList(.read_write), 2055 ready_queue_index: u64, 2056 // the object id at the tip of this branch 2057 newest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2058 // the object id furthest back in the history that hasn't been consumed 2059 oldest_object_id: ?[hash.byteLen(repo_opts.hash)]u8, 2060 2061 pub fn init( 2062 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2063 io: std.Io, 2064 allocator: std.mem.Allocator, 2065 consumed_object_ids: DB.HashMap(.read_only), 2066 ref: rf.Ref, 2067 ) !CommitIterator(repo_kind, repo_opts) { 2068 const db_file = try state.core.repo_dir.createFile(io, db_name, .{ .truncate = true, .lock = .exclusive, .read = true }); 2069 errdefer { 2070 db_file.close(io); 2071 state.core.repo_dir.deleteFile(io, db_name) catch {}; 2072 } 2073 2074 // cursors point at the db, so it needs a stable address 2075 const db_ptr = try allocator.create(TempDB); 2076 errdefer allocator.destroy(db_ptr); 2077 // the db is scratch state that gets deleted after iteration, so 2078 // there is nothing worth fsyncing 2079 db_ptr.* = try TempDB.init(.{ .io = io, .file = db_file, .fsync = false }); 2080 2081 const map = try TempDB.HashMap(.read_write).init(db_ptr.rootCursor()); 2082 2083 const parent_to_children_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "parent->children")); 2084 const parent_to_children = try TempDB.HashMap(.read_write).init(parent_to_children_cursor); 2085 2086 const child_to_pending_parents_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "child->pending-parents")); 2087 const child_to_pending_parents = try TempDB.HashMap(.read_write).init(child_to_pending_parents_cursor); 2088 2089 const ready_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "ready-queue")); 2090 const ready_queue = try TempDB.ArrayList(.read_write).init(ready_queue_cursor); 2091 2092 var self = CommitIterator(repo_kind, repo_opts){ 2093 .repo_dir = state.core.repo_dir, 2094 .db_file = db_file, 2095 .db = db_ptr, 2096 .parent_to_children = parent_to_children, 2097 .child_to_pending_parents = child_to_pending_parents, 2098 .ready_queue = ready_queue, 2099 .ready_queue_index = 0, 2100 .newest_object_id = null, 2101 .oldest_object_id = null, 2102 }; 2103 errdefer self.deinit(io, allocator); 2104 2105 try self.collect(state, io, allocator, consumed_object_ids, ref); 2106 2107 return self; 2108 } 2109 2110 pub fn deinit(self: *CommitIterator(repo_kind, repo_opts), io: std.Io, allocator: std.mem.Allocator) void { 2111 self.db_file.close(io); 2112 self.repo_dir.deleteFile(io, db_name) catch {}; 2113 allocator.destroy(self.db); 2114 } 2115 2116 pub fn next(self: *CommitIterator(repo_kind, repo_opts)) !?[hash.byteLen(repo_opts.hash)]u8 { 2117 if (self.ready_queue_index >= try self.ready_queue.count()) return null; 2118 2119 const oid = try readOidFromList(self.ready_queue.readOnly(), self.ready_queue_index); 2120 self.ready_queue_index += 1; 2121 2122 try self.enqueueChildren(&oid); 2123 return oid; 2124 } 2125 2126 fn collect( 2127 self: *CommitIterator(repo_kind, repo_opts), 2128 state: rp.Repo(repo_kind, repo_opts).State(.read_only), 2129 io: std.Io, 2130 allocator: std.mem.Allocator, 2131 consumed_object_ids: DB.HashMap(.read_only), 2132 ref: rf.Ref, 2133 ) !void { 2134 const map = try TempDB.HashMap(.read_write).init(self.db.rootCursor()); 2135 2136 const walk_queue_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "walk-queue")); 2137 const walk_queue = try TempDB.ArrayList(.read_write).init(walk_queue_cursor); 2138 var walk_queue_index: u64 = 0; 2139 2140 const seen_object_ids_cursor = try map.putCursor(hash.hashInt(repo_opts.hash, "seen-object-ids")); 2141 const seen_object_ids = try TempDB.HashSet(.read_write).init(seen_object_ids_cursor); 2142 2143 const head_oid_hex = (try rf.readRecur(repo_kind, repo_opts, state, io, .{ .ref = ref })) orelse return error.OidNotFound; 2144 var head_oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2145 _ = try std.fmt.hexToBytes(&head_oid, &head_oid_hex); 2146 try walk_queue.append(.{ .bytes = &head_oid }); 2147 2148 while (walk_queue_index < try walk_queue.count()) { 2149 const oid = try readOidFromList(walk_queue.readOnly(), walk_queue_index); 2150 const oid_int = hash.bytesToInt(repo_opts.hash, &oid); 2151 2152 walk_queue_index += 1; 2153 2154 // if we've seen this object id, skip it 2155 if (null != try seen_object_ids.getCursor(oid_int)) { 2156 continue; 2157 } 2158 2159 try seen_object_ids.put(oid_int, .{ .bytes = &oid }); 2160 2161 var commit_object = try obj.Object(repo_kind, repo_opts).init(state, io, allocator, &std.fmt.bytesToHex(oid, .lower)); 2162 defer commit_object.deinit(); 2163 2164 // if this object id has already been consumed, skip it 2165 if (null != try consumed_object_ids.getCursor(oid_int)) { 2166 continue; 2167 } 2168 2169 if (self.newest_object_id == null) self.newest_object_id = oid; 2170 self.oldest_object_id = oid; 2171 2172 const parent_oids = commit_object.content.commit.metadata.parent_oids orelse return error.ParentOidsNotFound; 2173 var pending_parent_count: u64 = 0; 2174 for (parent_oids) |*parent_oid| { 2175 var parent_oid_bytes: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2176 _ = try std.fmt.hexToBytes(&parent_oid_bytes, parent_oid); 2177 const parent_oid_int = hash.bytesToInt(repo_opts.hash, &parent_oid_bytes); 2178 2179 // if this object id has already been consumed, skip it 2180 if (null != try consumed_object_ids.getCursor(parent_oid_int)) { 2181 continue; 2182 } 2183 2184 // if this object id hasn't already been seen, add it to the walk queue 2185 if (null == try seen_object_ids.getCursor(parent_oid_int)) { 2186 try walk_queue.append(.{ .bytes = &parent_oid_bytes }); 2187 } 2188 2189 const children_cursor = try self.parent_to_children.putCursor(parent_oid_int); 2190 const children = try TempDB.HashSet(.read_write).init(children_cursor); 2191 try children.put(oid_int, .{ .bytes = &oid }); 2192 pending_parent_count += 1; 2193 } 2194 2195 if (pending_parent_count == 0) { 2196 try self.ready_queue.append(.{ .bytes = &oid }); 2197 } else { 2198 try self.child_to_pending_parents.put(oid_int, .{ .uint = pending_parent_count }); 2199 } 2200 } 2201 } 2202 2203 fn enqueueChildren(self: *CommitIterator(repo_kind, repo_opts), oid: *const [hash.byteLen(repo_opts.hash)]u8) !void { 2204 const oid_int = hash.bytesToInt(repo_opts.hash, oid); 2205 const children_cursor = try self.parent_to_children.getCursor(oid_int) orelse return; 2206 const children = try TempDB.HashSet(.read_only).init(children_cursor); 2207 var children_iter = try children.iterator(); 2208 2209 while (try children_iter.next()) |*child_cursor| { 2210 const kv_pair = try child_cursor.readKeyValuePair(); 2211 const child_oid_int = kv_pair.hash; 2212 const pending_parent_cursor = try self.child_to_pending_parents.getCursor(child_oid_int) orelse return error.CursorNotFound; 2213 const pending_parent_count = try pending_parent_cursor.readUint(); 2214 2215 if (pending_parent_count <= 1) { 2216 _ = try self.child_to_pending_parents.remove(child_oid_int); 2217 const child_oid = hash.intToBytes(hash.HashInt(repo_opts.hash), child_oid_int); 2218 try self.ready_queue.append(.{ .bytes = &child_oid }); 2219 } else { 2220 try self.child_to_pending_parents.put(child_oid_int, .{ .uint = pending_parent_count - 1 }); 2221 } 2222 } 2223 } 2224 2225 fn readOidFromList(list: TempDB.ArrayList(.read_only), index: u64) ![hash.byteLen(repo_opts.hash)]u8 { 2226 const oid_cursor = try list.getCursor(index) orelse return error.CursorNotFound; 2227 var oid: [hash.byteLen(repo_opts.hash)]u8 = undefined; 2228 _ = try oid_cursor.readBytes(&oid); 2229 return oid; 2230 } 2231 }; 2232 } 2233