zig/mach
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

obj: Make field tracking use a single bitset

Browse source
This commit is contained in:
foxnne 2024-11-28 10:52:12 -06:00 • committed by Emi Gutekanst
parent a43ffcacc2
commit 797f8f7a58
1 changed files with 14 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

23
src/module.zig
View file

@ -69,7 +69,7 @@ pub fn Objects(options: ObjectsOptions, comptime T: type) type {
graph: *Graph,
/// A bitset per-field used to track field changes. Only used if options.track_fields == true.
updated: ?std.ArrayListUnmanaged(std.bit_set.DynamicBitSetUnmanaged) = if (options.track_fields) .{} else null,
updated: ?std.bit_set.DynamicBitSetUnmanaged = if (options.track_fields) .{} else null,
},
pub const IsMachObjects = void;
@ -187,9 +187,9 @@ pub fn Objects(options: ObjectsOptions, comptime T: type) type {
try dead.resize(allocator, data.capacity, true);
try generation.ensureUnusedCapacity(allocator, 1);
// If we are tracking fields, we need to resize the bitset to hold another object's fields
if (objs.internal.updated) |*updated_fields| {
try updated_fields.ensureUnusedCapacity(allocator, 1);
updated_fields.appendAssumeCapacity(try std.bit_set.DynamicBitSetUnmanaged.initEmpty(allocator, @typeInfo(T).@"struct".fields.len));
try updated_fields.resize(allocator, data.capacity * @typeInfo(T).@"struct".fields.len, false);
}
const index = data.len;
@ -225,7 +225,11 @@ pub fn Objects(options: ObjectsOptions, comptime T: type) type {
const unpacked = objs.validateAndUnpack(id, "setAll");
data.set(unpacked.index, value);
if (options.track_fields) objs.internal.updated.items[unpacked.index].setAll();
if (objs.internal.updated) |*updated_fields| {
const updated_start = unpacked.index * @typeInfo(T).@"struct".fields.len;
const updated_end = updated_start + @typeInfo(T).@"struct".fields.len;
updated_fields.setRangeValue(.{ .start = @intCast(updated_start), .end = @intCast(updated_end) }, true);
}
}
/// Sets a single field of the given object to the given value.
@ -257,8 +261,8 @@ pub fn Objects(options: ObjectsOptions, comptime T: type) type {
if (options.track_fields)
if (std.meta.fieldIndex(T, @tagName(field_name))) |field_index|
if (objs.internal.updated) |updated_fields|
updated_fields.items[unpacked.index].set(field_index);
if (objs.internal.updated) |*updated_fields|
updated_fields.set(unpacked.index * @typeInfo(T).@"struct".fields.len + field_index);
}
/// Get a single field.
@ -324,9 +328,10 @@ pub fn Objects(options: ObjectsOptions, comptime T: type) type {
const unpacked = objs.validateAndUnpack(id, "updated");
if (std.meta.fieldIndex(T, @tagName(field_name))) |field_index| {
if (objs.internal.updated) |*updated_fields| {
const value = updated_fields.items[unpacked.index].isSet(field_index);
updated_fields.items[unpacked.index].unset(field_index);
return value;
const updated_index = unpacked.index * @typeInfo(T).@"struct".fields.len + field_index;
const updated_value = updated_fields.isSet(updated_index);
updated_fields.unset(updated_index);
return updated_value;
}
}
}