123 lines
2.8 KiB
Zig
123 lines
2.8 KiB
Zig
const coral = @import("coral");
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const kym = @import("../kym.zig");
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associative: RefTable,
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contiguous: RefList,
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const RefList = coral.list.Stack(?*kym.RuntimeRef);
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const RefTable = coral.map.Table(*kym.RuntimeRef, *kym.RuntimeRef, struct {
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pub const hash = kym.RuntimeRef.hash;
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pub const equals = kym.RuntimeRef.equals;
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});
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const Self = @This();
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pub fn free(self: *Self, env: *kym.RuntimeEnv) void {
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{
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var field_iterable = self.associative.as_iterable();
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while (field_iterable.next()) |entry| {
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env.discard(entry.key);
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env.discard(entry.value);
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}
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}
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self.associative.free();
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while (self.contiguous.pop()) |value| {
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if (value) |ref| {
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env.discard(ref);
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}
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}
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self.contiguous.free();
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}
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pub fn make(env: *kym.RuntimeEnv) Self {
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return .{
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.associative = RefTable.make(env.allocator, .{}),
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.contiguous = RefList.make(env.allocator),
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};
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}
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pub const typeinfo = &kym.Typeinfo{
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.size = @sizeOf(Self),
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.name = "table",
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.destruct = typeinfo_destruct,
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.get = typeinfo_get,
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.set = typeinfo_set,
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};
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fn typeinfo_destruct(env: *kym.RuntimeEnv, userdata: []coral.io.Byte) void {
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@as(*Self, @ptrCast(@alignCast(userdata))).free(env);
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}
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fn typeinfo_get(env: *kym.RuntimeEnv, userdata: []coral.io.Byte, index: *const kym.RuntimeRef) kym.RuntimeError!?*kym.RuntimeRef {
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const table = @as(*Self, @ptrCast(@alignCast(userdata)));
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const acquired_index = index.acquire();
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defer env.discard(acquired_index);
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if (acquired_index.as_fixed()) |fixed| {
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if (fixed < 0) {
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// TODO: Negative indexing.
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unreachable;
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}
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if (fixed < table.contiguous.values.len) {
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return (table.contiguous.values[@intCast(fixed)] orelse return null).acquire();
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}
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}
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if (table.associative.lookup(acquired_index)) |value| {
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return value.acquire();
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}
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return null;
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}
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fn typeinfo_set(env: *kym.RuntimeEnv, userdata: []coral.io.Byte, index: *const kym.RuntimeRef, value: ?*const kym.RuntimeRef) kym.RuntimeError!void {
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const table = @as(*Self, @ptrCast(@alignCast(userdata)));
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const acquired_index = index.acquire();
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errdefer env.discard(acquired_index);
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if (acquired_index.as_fixed()) |fixed| {
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if (fixed < 0) {
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// TODO: Negative indexing.
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unreachable;
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}
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if (fixed < table.contiguous.values.len) {
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const maybe_replacing = &table.contiguous.values[@intCast(fixed)];
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if (maybe_replacing.*) |replacing| {
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env.discard(replacing);
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}
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maybe_replacing.* = if (value) |ref| ref.acquire() else null;
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return;
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}
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}
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const acquired_value = (value orelse {
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if (table.associative.remove(acquired_index)) |removed| {
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env.discard(removed.key);
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env.discard(removed.value);
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}
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return;
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}).acquire();
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errdefer env.discard(acquired_value);
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if (try table.associative.replace(acquired_index, acquired_value)) |replaced| {
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env.discard(replaced.key);
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env.discard(replaced.value);
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}
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}
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