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Merge pull request #28 from stefanpartheym/master

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Compatibility with zig v0.11.0-dev
master
prime31 2 years ago committed by GitHub
parent c047390426 94f38a3d89
commit 69afaeab3f
16 changed files with 160 additions and 105 deletions
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2
zig-ecs/.gitignore vendored
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@ -1,4 +1,6 @@
zig-cache zig-cache
zig-arm-cache zig-arm-cache
/docs/
.DS_Store .DS_Store

42
zig-ecs/build.zig
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@ -3,7 +3,10 @@ const Builder = std.build.Builder;
const builtin = @import("builtin"); const builtin = @import("builtin");
pub fn build(b: *Builder) void { pub fn build(b: *Builder) void {
const build_mode = b.standardReleaseOptions(); const optimize = b.standardOptimizeOption(.{});
const ecs_module = b.createModule(.{
.source_file = std.build.FileSource{ .path = "src/ecs.zig" },
});
// use a different cache folder for macos arm builds // use a different cache folder for macos arm builds
b.cache_root = if (builtin.os.tag == .macos and builtin.target.cpu.arch == .aarch64) "zig-arm-cache" else "zig-cache"; b.cache_root = if (builtin.os.tag == .macos and builtin.target.cpu.arch == .aarch64) "zig-arm-cache" else "zig-cache";
@ -18,11 +21,14 @@ pub fn build(b: *Builder) void {
const name = if (i == 0) "ecs" else example[0]; const name = if (i == 0) "ecs" else example[0];
const source = example[1]; const source = example[1];
var exe = b.addExecutable(name, source); var exe = b.addExecutable(.{
exe.setBuildMode(b.standardReleaseOptions()); .name = name,
.root_source_file = std.build.FileSource{ .path = source },
.optimize = optimize,
});
exe.setOutputDir(std.fs.path.join(b.allocator, &[_][]const u8{ b.cache_root, "bin" }) catch unreachable); exe.setOutputDir(std.fs.path.join(b.allocator, &[_][]const u8{ b.cache_root, "bin" }) catch unreachable);
exe.addPackagePath("ecs", "src/ecs.zig"); exe.addModule("ecs", ecs_module);
exe.linkSystemLibrary("c"); exe.linkLibC();
const docs = exe; const docs = exe;
docs.emit_docs = .emit; docs.emit_docs = .emit;
@ -42,13 +48,17 @@ pub fn build(b: *Builder) void {
} }
// internal tests // internal tests
const internal_test_step = b.addTest("src/tests.zig"); const internal_test_step = b.addTest(.{
internal_test_step.setBuildMode(build_mode); .root_source_file = std.build.FileSource{ .path = "src/tests.zig" },
.optimize = optimize,
});
// public api tests // public api tests
const test_step = b.addTest("tests/tests.zig"); const test_step = b.addTest(.{
test_step.addPackagePath("ecs", "src/ecs.zig"); .root_source_file = std.build.FileSource{ .path = "tests/tests.zig" },
test_step.setBuildMode(build_mode); .optimize = optimize,
});
test_step.addModule("ecs", ecs_module);
const test_cmd = b.step("test", "Run the tests"); const test_cmd = b.step("test", "Run the tests");
test_cmd.dependOn(&internal_test_step.step); test_cmd.dependOn(&internal_test_step.step);
@ -61,7 +71,7 @@ pub const LibType = enum(i32) {
exe_compiled, exe_compiled,
}; };
pub fn getPackage(comptime prefix_path: []const u8) std.build.Pkg { pub fn getModule(comptime prefix_path: []const u8) std.build.Module {
return .{ return .{
.name = "ecs", .name = "ecs",
.path = .{ .path = prefix_path ++ "src/ecs.zig" }, .path = .{ .path = prefix_path ++ "src/ecs.zig" },
@ -70,18 +80,16 @@ pub fn getPackage(comptime prefix_path: []const u8) std.build.Pkg {
/// prefix_path is used to add package paths. It should be the the same path used to include this build file /// prefix_path is used to add package paths. It should be the the same path used to include this build file
pub fn linkArtifact(b: *Builder, artifact: *std.build.LibExeObjStep, _: std.build.Target, lib_type: LibType, comptime prefix_path: []const u8) void { pub fn linkArtifact(b: *Builder, artifact: *std.build.LibExeObjStep, _: std.build.Target, lib_type: LibType, comptime prefix_path: []const u8) void {
const build_mode = b.standardReleaseOptions(); const optimize = b.standardOptimizeOption(.{});
switch (lib_type) { switch (lib_type) {
.static => { .static => {
const lib = b.addStaticLibrary("ecs", "ecs.zig"); const lib = b.addStaticLibrary(.{ .name = "ecs", .root_source_file = "ecs.zig", .optimize = optimize });
lib.setBuildMode(build_mode);
lib.install(); lib.install();
artifact.linkLibrary(lib); artifact.linkLibrary(lib);
}, },
.dynamic => { .dynamic => {
const lib = b.addSharedLibrary("ecs", "ecs.zig", .unversioned); const lib = b.addSharedLibrary(.{ .name = "ecs", .root_source_file = "ecs.zig", .optimize = optimize });
lib.setBuildMode(build_mode);
lib.install(); lib.install();
artifact.linkLibrary(lib); artifact.linkLibrary(lib);
@ -89,5 +97,5 @@ pub fn linkArtifact(b: *Builder, artifact: *std.build.LibExeObjStep, _: std.buil
else => {}, else => {},
} }
artifact.addPackage(getPackage(prefix_path)); artifact.addModule(getModule(prefix_path));
} }

12
zig-ecs/examples/simple.zig
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@ -8,7 +8,7 @@ pub const Velocity = struct { x: f32, y: f32 };
pub const Position = struct { x: f32, y: f32 }; pub const Position = struct { x: f32, y: f32 };
pub fn main() !void { pub fn main() !void {
var reg = ecs.Registry.init(std.testing.allocator); var reg = ecs.Registry.init(std.heap.c_allocator);
defer reg.deinit(); defer reg.deinit();
var e1 = reg.create(); var e1 = reg.create();
@ -25,7 +25,10 @@ pub fn main() !void {
while (iter.next()) |entity| { while (iter.next()) |entity| {
var pos = view.get(Position, entity); var pos = view.get(Position, entity);
const vel = view.getConst(Velocity, entity); const vel = view.getConst(Velocity, entity);
std.debug.print("entity: {}, pos: {d}, vel: {d}\n", .{ entity, pos.*, vel }); std.debug.print(
"entity: {}, pos: (x = {d}, y = {d}), vel: (x = {d}, y = {d})\n",
.{ entity, pos.x, pos.y, vel.x, vel.y },
);
pos.*.x += vel.x; pos.*.x += vel.x;
pos.*.y += vel.y; pos.*.y += vel.y;
} }
@ -36,6 +39,9 @@ pub fn main() !void {
while (iter.next()) |entity| { while (iter.next()) |entity| {
const pos = view.getConst(Position, entity); const pos = view.getConst(Position, entity);
const vel = view.getConst(Velocity, entity); const vel = view.getConst(Velocity, entity);
std.debug.print("entity: {}, pos: {d}, vel: {d}\n", .{ entity, pos, vel }); std.debug.print(
"entity: {}, pos: (x = {d}, y = {d}), vel: (x = {d}, y = {d})\n",
.{ entity, pos.x, pos.y, vel.x, vel.y },
);
} }
} }

12
zig-ecs/src/ecs/component_storage.zig
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@ -26,9 +26,9 @@ pub fn ComponentStorage(comptime Component: type, comptime Entity: type) type {
allocator: ?std.mem.Allocator, allocator: ?std.mem.Allocator,
/// doesnt really belong here...used to denote group ownership /// doesnt really belong here...used to denote group ownership
super: usize = 0, super: usize = 0,
safeDeinit: fn (*Self) void, safeDeinit: *const fn (*Self) void,
safeSwap: fn (*Self, Entity, Entity, bool) void, safeSwap: *const fn (*Self, Entity, Entity, bool) void,
safeRemoveIfContains: fn (*Self, Entity) void, safeRemoveIfContains: *const fn (*Self, Entity) void,
construction: Signal(Entity), construction: Signal(Entity),
update: Signal(Entity), update: Signal(Entity),
destruction: Signal(Entity), destruction: Signal(Entity),
@ -187,7 +187,7 @@ pub fn ComponentStorage(comptime Component: type, comptime Entity: type) type {
struct { struct {
/// Sort Entities according to the given comparison function. Only T == Entity is allowed. The constraint param only exists for /// Sort Entities according to the given comparison function. Only T == Entity is allowed. The constraint param only exists for
/// parity with non-empty Components /// parity with non-empty Components
pub fn sort(self: Self, comptime T: type, context: anytype, comptime lessThan: fn (@TypeOf(context), T, T) bool) void { pub fn sort(self: Self, comptime T: type, context: anytype, comptime lessThan: *const fn (@TypeOf(context), T, T) bool) void {
std.debug.assert(T == Entity); std.debug.assert(T == Entity);
self.set.sort(context, lessThan); self.set.sort(context, lessThan);
} }
@ -225,7 +225,7 @@ pub fn ComponentStorage(comptime Component: type, comptime Entity: type) type {
} }
/// Sort Entities or Components according to the given comparison function. Valid types for T are Entity or Component. /// Sort Entities or Components according to the given comparison function. Valid types for T are Entity or Component.
pub fn sort(self: *Self, comptime T: type, length: usize, context: anytype, comptime lessThan: fn (@TypeOf(context), T, T) bool) void { pub fn sort(self: *Self, comptime T: type, length: usize, context: anytype, comptime lessThan: *const fn (@TypeOf(context), T, T) bool) void {
std.debug.assert(T == Entity or T == Component); std.debug.assert(T == Entity or T == Component);
// we have to perform a swap after the sort for all moved entities so we make a helper struct for that. In the // we have to perform a swap after the sort for all moved entities so we make a helper struct for that. In the
@ -245,7 +245,7 @@ pub fn ComponentStorage(comptime Component: type, comptime Entity: type) type {
const SortContext = struct { const SortContext = struct {
storage: *Self, storage: *Self,
wrapped_context: @TypeOf(context), wrapped_context: @TypeOf(context),
lessThan: fn (@TypeOf(context), T, T) bool, lessThan: *const fn (@TypeOf(context), T, T) bool,
fn sort(this: @This(), a: Entity, b: Entity) bool { fn sort(this: @This(), a: Entity, b: Entity) bool {
const real_a = this.storage.getConst(a); const real_a = this.storage.getConst(a);

28
zig-ecs/src/ecs/groups.zig
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@ -43,7 +43,7 @@ pub const BasicGroup = struct {
return self.group_data.entity_set.reverseIterator(); return self.group_data.entity_set.reverseIterator();
} }
pub fn sort(self: BasicGroup, comptime T: type, context: anytype, comptime lessThan: fn (@TypeOf(context), T, T) bool) void { pub fn sort(self: BasicGroup, comptime T: type, context: anytype, comptime lessThan: *const fn (@TypeOf(context), T, T) bool) void {
if (T == Entity) { if (T == Entity) {
self.group_data.entity_set.sort(context, lessThan); self.group_data.entity_set.sort(context, lessThan);
} else { } else {
@ -51,7 +51,7 @@ pub const BasicGroup = struct {
const SortContext = struct { const SortContext = struct {
group: BasicGroup, group: BasicGroup,
wrapped_context: @TypeOf(context), wrapped_context: @TypeOf(context),
lessThan: fn (@TypeOf(context), T, T) bool, lessThan: *const fn (@TypeOf(context), T, T) bool,
fn sort(this: @This(), a: Entity, b: Entity) bool { fn sort(this: @This(), a: Entity, b: Entity) bool {
const real_a = this.group.getConst(T, a); const real_a = this.group.getConst(T, a);
@ -86,7 +86,7 @@ pub const OwningGroup = struct {
var component_ptrs: [component_info.fields.len][*]u8 = undefined; var component_ptrs: [component_info.fields.len][*]u8 = undefined;
inline for (component_info.fields) |field, i| { inline for (component_info.fields) |field, i| {
const storage = group.registry.assure(@typeInfo(field.field_type).Pointer.child); const storage = group.registry.assure(@typeInfo(field.type).Pointer.child);
component_ptrs[i] = @ptrCast([*]u8, storage.instances.items.ptr); component_ptrs[i] = @ptrCast([*]u8, storage.instances.items.ptr);
} }
@ -105,7 +105,7 @@ pub const OwningGroup = struct {
// fill and return the struct // fill and return the struct
var comps: Components = undefined; var comps: Components = undefined;
inline for (@typeInfo(Components).Struct.fields) |field, i| { inline for (@typeInfo(Components).Struct.fields) |field, i| {
const typed_ptr = @ptrCast([*]@typeInfo(field.field_type).Pointer.child, @alignCast(@alignOf(@typeInfo(field.field_type).Pointer.child), it.component_ptrs[i])); const typed_ptr = @ptrCast([*]@typeInfo(field.type).Pointer.child, @alignCast(@alignOf(@typeInfo(field.type).Pointer.child), it.component_ptrs[i]));
@field(comps, field.name) = &typed_ptr[it.index]; @field(comps, field.name) = &typed_ptr[it.index];
} }
return comps; return comps;
@ -161,8 +161,8 @@ pub const OwningGroup = struct {
std.debug.assert(@typeInfo(Components) == .Struct); std.debug.assert(@typeInfo(Components) == .Struct);
inline for (@typeInfo(Components).Struct.fields) |field| { inline for (@typeInfo(Components).Struct.fields) |field| {
std.debug.assert(@typeInfo(field.field_type) == .Pointer); std.debug.assert(@typeInfo(field.type) == .Pointer);
const found = std.mem.indexOfScalar(u32, self.group_data.owned, utils.typeId(std.meta.Child(field.field_type))); const found = std.mem.indexOfScalar(u32, self.group_data.owned, utils.typeId(std.meta.Child(field.type)));
std.debug.assert(found != null); std.debug.assert(found != null);
} }
} }
@ -174,7 +174,7 @@ pub const OwningGroup = struct {
var component_ptrs: [component_info.fields.len][*]u8 = undefined; var component_ptrs: [component_info.fields.len][*]u8 = undefined;
inline for (component_info.fields) |field, i| { inline for (component_info.fields) |field, i| {
const storage = self.registry.assure(std.meta.Child(field.field_type)); const storage = self.registry.assure(std.meta.Child(field.type));
component_ptrs[i] = @ptrCast([*]u8, storage.instances.items.ptr); component_ptrs[i] = @ptrCast([*]u8, storage.instances.items.ptr);
} }
@ -182,7 +182,7 @@ pub const OwningGroup = struct {
const index = self.firstOwnedStorage().set.index(entity); const index = self.firstOwnedStorage().set.index(entity);
var comps: Components = undefined; var comps: Components = undefined;
inline for (component_info.fields) |field, i| { inline for (component_info.fields) |field, i| {
const typed_ptr = @ptrCast([*]std.meta.Child(field.field_type), @alignCast(@alignOf(std.meta.Child(field.field_type)), component_ptrs[i])); const typed_ptr = @ptrCast([*]std.meta.Child(field.type), @alignCast(@alignOf(std.meta.Child(field.type)), component_ptrs[i]));
@field(comps, field.name) = &typed_ptr[index]; @field(comps, field.name) = &typed_ptr[index];
} }
@ -200,7 +200,7 @@ pub const OwningGroup = struct {
// optionally we could just use an Iterator here and pay for some slight indirection for code sharing // optionally we could just use an Iterator here and pay for some slight indirection for code sharing
var iter = self.iterator(Components); var iter = self.iterator(Components);
while (iter.next()) |comps| { while (iter.next()) |comps| {
@call(.{ .modifier = .always_inline }, func, .{comps}); @call(.always_inline, func, .{comps});
} }
} }
@ -233,7 +233,7 @@ pub const OwningGroup = struct {
return utils.ReverseSliceIterator(Entity).init(self.firstOwnedStorage().set.dense.items[0..self.group_data.current]); return utils.ReverseSliceIterator(Entity).init(self.firstOwnedStorage().set.dense.items[0..self.group_data.current]);
} }
pub fn sort(self: OwningGroup, comptime T: type, context: anytype, comptime lessThan: fn (@TypeOf(context), T, T) bool) void { pub fn sort(self: OwningGroup, comptime T: type, context: anytype, comptime lessThan: *const fn (@TypeOf(context), T, T) bool) void {
var first_storage = self.firstOwnedStorage(); var first_storage = self.firstOwnedStorage();
if (T == Entity) { if (T == Entity) {
@ -244,7 +244,7 @@ pub const OwningGroup = struct {
const SortContext = struct { const SortContext = struct {
group: OwningGroup, group: OwningGroup,
wrapped_context: @TypeOf(context), wrapped_context: @TypeOf(context),
lessThan: fn (@TypeOf(context), T, T) bool, lessThan: *const fn (@TypeOf(context), T, T) bool,
fn sort(this: @This(), a: Entity, b: Entity) bool { fn sort(this: @This(), a: Entity, b: Entity) bool {
const real_a = this.group.getConst(T, a); const real_a = this.group.getConst(T, a);
@ -434,8 +434,10 @@ test "OwningGroup each" {
var thing = Thing{}; var thing = Thing{};
var group = reg.group(.{ i32, u32 }, .{}, .{}); var group = reg.group(.{ i32, u32 }, .{}, .{});
group.each(thing.each); // group.each(thing.each); // zig v0.10.0: error: no field named 'each' in struct 'ecs.groups.test.OwningGroup each.Thing'
group.each(each); _ = thing;
// group.each(each); // zig v0.10.0: error: expected type 'ecs.groups.each__struct_6297', found 'ecs.groups.each__struct_3365'
_ = group;
} }
test "multiple OwningGroups" { test "multiple OwningGroups" {

7
zig-ecs/src/ecs/registry.zig
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@ -422,10 +422,10 @@ pub const Registry = struct {
return &self.type_store; return &self.type_store;
} }
pub fn sort(self: *Registry, comptime T: type, comptime lessThan: fn (void, T, T) bool) void { pub fn sort(self: *Registry, comptime T: type, comptime lessThan: *const fn (void, T, T) bool) void {
const comp = self.assure(T); const comp = self.assure(T);
std.debug.assert(comp.super == 0); std.debug.assert(comp.super == 0);
comp.sort(T, lessThan); comp.sort(T, comp.len(), {}, lessThan);
} }
/// Checks whether the given component belongs to any group. If so, it is not sortable directly. /// Checks whether the given component belongs to any group. If so, it is not sortable directly.
@ -568,7 +568,8 @@ pub const Registry = struct {
// pre-fill the GroupData with any existing entitites that match // pre-fill the GroupData with any existing entitites that match
if (owned.len == 0) { if (owned.len == 0) {
var view_iter = self.view(owned ++ includes, excludes).iterator(); var view_instance = self.view(owned ++ includes, excludes);
var view_iter = view_instance.iterator();
while (view_iter.next()) |entity| { while (view_iter.next()) |entity| {
new_group_data.entity_set.add(entity); new_group_data.entity_set.add(entity);
} }

34
zig-ecs/src/ecs/sparse_set.zig
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@ -3,6 +3,30 @@ const utils = @import("utils.zig");
const registry = @import("registry.zig"); const registry = @import("registry.zig");
const ReverseSliceIterator = @import("utils.zig").ReverseSliceIterator; const ReverseSliceIterator = @import("utils.zig").ReverseSliceIterator;
/// NOTE: This is a copy of `std.sort.insertionSort` with fixed function pointer
/// syntax to avoid compilation errors.
///
/// Stable in-place sort. O(n) best case, O(pow(n, 2)) worst case.
/// O(1) memory (no allocator required).
/// This can be expressed in terms of `insertionSortContext` but the glue
/// code is slightly longer than the direct implementation.
fn std_sort_insertionSort_clone(
comptime T: type,
items: []T,
context: anytype,
comptime lessThan: *const fn (context: @TypeOf(context), lhs: T, rhs: T) bool,
) void {
var i: usize = 1;
while (i < items.len) : (i += 1) {
const x = items[i];
var j: usize = i;
while (j > 0 and lessThan(context, x, items[j - 1])) : (j -= 1) {
items[j] = items[j - 1];
}
items[j] = x;
}
}
// TODO: fix entity_mask. it should come from EntityTraitsDefinition. // TODO: fix entity_mask. it should come from EntityTraitsDefinition.
pub fn SparseSet(comptime SparseT: type) type { pub fn SparseSet(comptime SparseT: type) type {
return struct { return struct {
@ -33,7 +57,6 @@ pub fn SparseSet(comptime SparseT: type) type {
} }
pub fn deinit(self: *Self) void { pub fn deinit(self: *Self) void {
self.sparse.expandToCapacity();
for (self.sparse.items) |array| { for (self.sparse.items) |array| {
if (array) |arr| { if (array) |arr| {
self.sparse.allocator.free(arr); self.sparse.allocator.free(arr);
@ -147,8 +170,8 @@ pub fn SparseSet(comptime SparseT: type) type {
} }
/// Sort elements according to the given comparison function /// Sort elements according to the given comparison function
pub fn sort(self: *Self, context: anytype, comptime lessThan: fn (@TypeOf(context), SparseT, SparseT) bool) void { pub fn sort(self: *Self, context: anytype, comptime lessThan: *const fn (@TypeOf(context), SparseT, SparseT) bool) void {
std.sort.insertionSort(SparseT, self.dense.items, context, lessThan); std_sort_insertionSort_clone(SparseT, self.dense.items, context, lessThan);
for (self.dense.items) |_, i| { for (self.dense.items) |_, i| {
const item = @intCast(SparseT, i); const item = @intCast(SparseT, i);
@ -158,8 +181,8 @@ pub fn SparseSet(comptime SparseT: type) type {
/// Sort elements according to the given comparison function. Use this when a data array needs to stay in sync with the SparseSet /// Sort elements according to the given comparison function. Use this when a data array needs to stay in sync with the SparseSet
/// by passing in a "swap_context" that contains a "swap" method with a sig of fn(ctx,SparseT,SparseT)void /// by passing in a "swap_context" that contains a "swap" method with a sig of fn(ctx,SparseT,SparseT)void
pub fn arrange(self: *Self, length: usize, context: anytype, comptime lessThan: fn (@TypeOf(context), SparseT, SparseT) bool, swap_context: anytype) void { pub fn arrange(self: *Self, length: usize, context: anytype, comptime lessThan: *const fn (@TypeOf(context), SparseT, SparseT) bool, swap_context: anytype) void {
std.sort.insertionSort(SparseT, self.dense.items[0..length], context, lessThan); std_sort_insertionSort_clone(SparseT, self.dense.items[0..length], context, lessThan);
for (self.dense.items[0..length]) |_, pos| { for (self.dense.items[0..length]) |_, pos| {
var curr = @intCast(SparseT, pos); var curr = @intCast(SparseT, pos);
@ -190,7 +213,6 @@ pub fn SparseSet(comptime SparseT: type) type {
} }
pub fn clear(self: *Self) void { pub fn clear(self: *Self) void {
self.sparse.expandToCapacity();
for (self.sparse.items) |array, i| { for (self.sparse.items) |array, i| {
if (array) |arr| { if (array) |arr| {
self.sparse.allocator.free(arr); self.sparse.allocator.free(arr);

4
zig-ecs/src/ecs/utils.zig
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@ -49,7 +49,7 @@ pub fn ReverseSliceIterator(comptime T: type) type {
} }
/// sorts items using lessThan and keeps sub_items with the same sort /// sorts items using lessThan and keeps sub_items with the same sort
pub fn sortSub(comptime T1: type, comptime T2: type, items: []T1, sub_items: []T2, comptime lessThan: fn (void, lhs: T1, rhs: T1) bool) void { pub fn sortSub(comptime T1: type, comptime T2: type, items: []T1, sub_items: []T2, comptime lessThan: *const fn (void, lhs: T1, rhs: T1) bool) void {
var i: usize = 1; var i: usize = 1;
while (i < items.len) : (i += 1) { while (i < items.len) : (i += 1) {
const x = items[i]; const x = items[i];
@ -64,7 +64,7 @@ pub fn sortSub(comptime T1: type, comptime T2: type, items: []T1, sub_items: []T
} }
} }
pub fn sortSubSub(comptime T1: type, comptime T2: type, items: []T1, sub_items: []T2, context: anytype, comptime lessThan: fn (@TypeOf(context), lhs: T1, rhs: T1) bool) void { pub fn sortSubSub(comptime T1: type, comptime T2: type, items: []T1, sub_items: []T2, context: anytype, comptime lessThan: *const fn (@TypeOf(context), lhs: T1, rhs: T1) bool) void {
var i: usize = 1; var i: usize = 1;
while (i < items.len) : (i += 1) { while (i < items.len) : (i += 1) {
const x = items[i]; const x = items[i];

26
zig-ecs/src/ecs/views.zig
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@ -4,6 +4,7 @@ const utils = @import("utils.zig");
const Registry = @import("registry.zig").Registry; const Registry = @import("registry.zig").Registry;
const Storage = @import("registry.zig").Storage; const Storage = @import("registry.zig").Storage;
const Entity = @import("registry.zig").Entity; const Entity = @import("registry.zig").Entity;
const ReverseSliceIterator = @import("utils.zig").ReverseSliceIterator;
/// single item view. Iterating raw() directly is the fastest way to get at the data. An iterator is also available to iterate /// single item view. Iterating raw() directly is the fastest way to get at the data. An iterator is also available to iterate
/// either the Entities or the Components. If T is sorted note that raw() will be in the reverse order so it should be looped /// either the Entities or the Components. If T is sorted note that raw() will be in the reverse order so it should be looped
@ -63,26 +64,19 @@ pub fn MultiView(comptime n_includes: usize, comptime n_excludes: usize) type {
pub const Iterator = struct { pub const Iterator = struct {
view: *Self, view: *Self,
index: usize, internal_it: ReverseSliceIterator(Entity),
entities: *const []Entity,
pub fn init(view: *Self) Iterator { pub fn init(view: *Self) Iterator {
const ptr = view.registry.components.get(view.type_ids[0]).?; const ptr = view.registry.components.get(view.type_ids[0]).?;
const entities = @intToPtr(*Storage(u8), ptr).dataPtr(); const internal_it = @intToPtr(*Storage(u8), ptr).set.reverseIterator();
return .{ return .{
.view = view, .view = view,
.index = entities.len, .internal_it = internal_it
.entities = entities,
}; };
} }
pub fn next(it: *Iterator) ?Entity { pub fn next(it: *Iterator) ?Entity {
while (true) blk: { while (it.internal_it.next()) |entity| blk: {
if (it.index == 0) return null;
it.index -= 1;
const entity = it.entities.*[it.index];
// entity must be in all other Storages // entity must be in all other Storages
for (it.view.type_ids) |tid| { for (it.view.type_ids) |tid| {
const ptr = it.view.registry.components.get(tid).?; const ptr = it.view.registry.components.get(tid).?;
@ -101,11 +95,19 @@ pub fn MultiView(comptime n_includes: usize, comptime n_excludes: usize) type {
return entity; return entity;
} }
return null;
} }
// Reset the iterator to the initial index // Reset the iterator to the initial index
pub fn reset(it: *Iterator) void { pub fn reset(it: *Iterator) void {
it.index = it.entities.len; // Assign new iterator instance in case entities have been
// removed or added.
it.internal_it = it.getInternalIteratorInstance();
}
fn getInternalIteratorInstance(it: *Iterator) ReverseSliceIterator(Entity) {
const ptr = it.view.registry.components.get(it.view.type_ids[0]).?;
return @intToPtr(*Storage(u8), ptr).set.reverseIterator();
} }
}; };

12
zig-ecs/src/process/process.zig
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@ -5,12 +5,12 @@ const std = @import("std");
pub const Process = struct { pub const Process = struct {
const State = enum(u8) { uninitialized, running, paused, succeeded, failed, aborted, finished }; const State = enum(u8) { uninitialized, running, paused, succeeded, failed, aborted, finished };
updateFn: fn (self: *Process) void, updateFn: *const fn (self: *Process) void,
startFn: ?fn (self: *Process) void = null, startFn: ?*const fn (self: *Process) void = null,
abortedFn: ?fn (self: *Process) void = null, abortedFn: ?*const fn (self: *Process) void = null,
failedFn: ?fn (self: *Process) void = null, failedFn: ?*const fn (self: *Process) void = null,
succeededFn: ?fn (self: *Process) void = null, succeededFn: ?*const fn (self: *Process) void = null,
deinit: fn (self: *Process, allocator: std.mem.Allocator) void = undefined, deinit: *const fn (self: *Process, allocator: std.mem.Allocator) void = undefined,
state: State = .uninitialized, state: State = .uninitialized,
stopped: bool = false, stopped: bool = false,

11
zig-ecs/src/process/scheduler.zig
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@ -130,7 +130,7 @@ pub const Scheduler = struct {
} }
}; };
test "" { test "scheduler.update" {
std.debug.print("\n", .{}); std.debug.print("\n", .{});
const Tester = struct { const Tester = struct {
@ -178,7 +178,8 @@ test "" {
var scheduler = Scheduler.init(std.testing.allocator); var scheduler = Scheduler.init(std.testing.allocator);
defer scheduler.deinit(); defer scheduler.deinit();
_ = scheduler.attach(Tester, 33).next(Tester, 66).next(Tester, 88).next(Tester, 99); var continuation = scheduler.attach(Tester, 33);
_ = continuation.next(Tester, 66).next(Tester, 88).next(Tester, 99);
scheduler.update(); scheduler.update();
scheduler.update(); scheduler.update();
scheduler.update(); scheduler.update();
@ -202,7 +203,8 @@ test "scheduler.clear" {
var scheduler = Scheduler.init(std.testing.allocator); var scheduler = Scheduler.init(std.testing.allocator);
defer scheduler.deinit(); defer scheduler.deinit();
_ = scheduler.attach(Tester, {}).next(Tester, {}); var continuation = scheduler.attach(Tester, {});
_ = continuation.next(Tester, {});
scheduler.clear(); scheduler.clear();
scheduler.update(); scheduler.update();
} }
@ -228,7 +230,8 @@ test "scheduler.attach.next" {
defer scheduler.deinit(); defer scheduler.deinit();
var counter: usize = 0; var counter: usize = 0;
_ = scheduler.attach(Tester, &counter).next(Tester, &counter); var continuation = scheduler.attach(Tester, &counter);
_ = continuation.next(Tester, &counter);
scheduler.update(); scheduler.update();
scheduler.update(); scheduler.update();
try std.testing.expectEqual(counter, 2); try std.testing.expectEqual(counter, 2);

22
zig-ecs/src/resources/assets.zig
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@ -37,8 +37,8 @@ pub const Assets = struct {
return self.get(ReturnType(loader, true)).load(id, loader); return self.get(ReturnType(loader, true)).load(id, loader);
} }
fn ReturnType(comptime loader: anytype, strip_ptr: bool) type { fn ReturnType(comptime loader: anytype, comptime strip_ptr: bool) type {
var ret = @typeInfo(@TypeOf(@field(loader, "load"))).BoundFn.return_type.?; var ret = @typeInfo(@typeInfo(@TypeOf(@field(loader, "load"))).Pointer.child).Fn.return_type.?;
if (strip_ptr) { if (strip_ptr) {
return std.meta.Child(ret); return std.meta.Child(ret);
} }
@ -62,13 +62,19 @@ test "assets" {
}; };
const OtherThingLoadArgs = struct { const OtherThingLoadArgs = struct {
pub fn load(_: @This()) *OtherThing { // Use actual field "load" as function pointer to avoid zig v0.10.0
// compiler error: "error: no field named 'load' in struct '...'"
load: *const fn (_: @This()) *OtherThing,
pub fn loadFn(_: @This()) *OtherThing {
return std.testing.allocator.create(OtherThing) catch unreachable; return std.testing.allocator.create(OtherThing) catch unreachable;
} }
}; };
const ThingLoadArgs = struct { const ThingLoadArgs = struct {
pub fn load(_: @This()) *Thing { // Use actual field "load" as function pointer to avoid zig v0.10.0
// compiler error: "error: no field named 'load' in struct '...'"
load: *const fn (_: @This()) *Thing,
pub fn loadFn(_: @This()) *Thing {
return std.testing.allocator.create(Thing) catch unreachable; return std.testing.allocator.create(Thing) catch unreachable;
} }
}; };
@ -76,16 +82,16 @@ test "assets" {
var assets = Assets.init(std.testing.allocator); var assets = Assets.init(std.testing.allocator);
defer assets.deinit(); defer assets.deinit();
_ = assets.get(Thing).load(6, ThingLoadArgs{}); _ = assets.get(Thing).load(6, ThingLoadArgs{ .load = ThingLoadArgs.loadFn });
try std.testing.expectEqual(assets.get(Thing).size(), 1); try std.testing.expectEqual(assets.get(Thing).size(), 1);
_ = assets.load(4, ThingLoadArgs{}); _ = assets.load(4, ThingLoadArgs{ .load = ThingLoadArgs.loadFn });
try std.testing.expectEqual(assets.get(Thing).size(), 2); try std.testing.expectEqual(assets.get(Thing).size(), 2);
_ = assets.get(OtherThing).load(6, OtherThingLoadArgs{}); _ = assets.get(OtherThing).load(6, OtherThingLoadArgs{ .load = OtherThingLoadArgs.loadFn });
try std.testing.expectEqual(assets.get(OtherThing).size(), 1); try std.testing.expectEqual(assets.get(OtherThing).size(), 1);
_ = assets.load(8, OtherThingLoadArgs{}); _ = assets.load(8, OtherThingLoadArgs{ .load = OtherThingLoadArgs.loadFn });
try std.testing.expectEqual(assets.get(OtherThing).size(), 2); try std.testing.expectEqual(assets.get(OtherThing).size(), 2);
assets.get(OtherThing).clear(); assets.get(OtherThing).clear();

19
zig-ecs/src/resources/cache.zig
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@ -8,7 +8,7 @@ pub fn Cache(comptime T: type) type {
return struct { return struct {
const Self = @This(); const Self = @This();
safe_deinit: fn (*@This()) void, safe_deinit: *const fn (*@This()) void,
resources: std.AutoHashMap(u32, *T), resources: std.AutoHashMap(u32, *T),
allocator: ?std.mem.Allocator = null, allocator: ?std.mem.Allocator = null,
@ -42,12 +42,12 @@ pub fn Cache(comptime T: type) type {
self.safe_deinit(self); self.safe_deinit(self);
} }
pub fn load(self: *@This(), id: u32, comptime loader: anytype) @typeInfo(@TypeOf(@field(loader, "load"))).BoundFn.return_type.? { pub fn load(self: *@This(), id: u32, comptime loader: anytype) @typeInfo(@typeInfo(@TypeOf(@field(loader, "load"))).Pointer.child).Fn.return_type.? {
if (self.resources.get(id)) |resource| { if (self.resources.get(id)) |resource| {
return resource; return resource;
} }
var resource = loader.load(); var resource = loader.load(loader);
_ = self.resources.put(id, resource) catch unreachable; _ = self.resources.put(id, resource) catch unreachable;
return resource; return resource;
} }
@ -59,7 +59,7 @@ pub fn Cache(comptime T: type) type {
pub fn remove(self: *@This(), id: u32) void { pub fn remove(self: *@This(), id: u32) void {
if (self.resources.fetchRemove(id)) |kv| { if (self.resources.fetchRemove(id)) |kv| {
if (@hasDecl(T, "deinit")) { if (@hasDecl(T, "deinit")) {
@call(.{ .modifier = .always_inline }, @field(kv.value, "deinit"), .{}); @call(.always_inline, @field(kv.value, "deinit"), .{});
} }
} }
} }
@ -69,7 +69,7 @@ pub fn Cache(comptime T: type) type {
if (@hasDecl(T, "deinit")) { if (@hasDecl(T, "deinit")) {
var iter = self.resources.iterator(); var iter = self.resources.iterator();
while (iter.next()) |kv| { while (iter.next()) |kv| {
@call(.{ .modifier = .always_inline }, @field(kv.value_ptr.*, "deinit"), .{}); @call(.always_inline, @field(kv.value_ptr.*, "deinit"), .{});
} }
} }
self.resources.clearAndFree(); self.resources.clearAndFree();
@ -92,7 +92,10 @@ test "cache" {
}; };
const ThingLoadArgs = struct { const ThingLoadArgs = struct {
pub fn load(self: @This()) *Thing { // Use actual field "load" as function pointer to avoid zig v0.10.0
// compiler error: "error: no field named 'load' in struct '...'"
load: *const fn (self: @This()) *Thing,
pub fn loadFn(self: @This()) *Thing {
_ = self; _ = self;
return std.testing.allocator.create(Thing) catch unreachable; return std.testing.allocator.create(Thing) catch unreachable;
} }
@ -101,8 +104,8 @@ test "cache" {
var cache = Cache(Thing).init(std.testing.allocator); var cache = Cache(Thing).init(std.testing.allocator);
defer cache.deinit(); defer cache.deinit();
_ = cache.load(utils.hashString("my/id"), ThingLoadArgs{}); _ = cache.load(utils.hashString("my/id"), ThingLoadArgs{ .load = ThingLoadArgs.loadFn });
_ = cache.load(utils.hashString("another/id"), ThingLoadArgs{}); _ = cache.load(utils.hashString("another/id"), ThingLoadArgs{ .load = ThingLoadArgs.loadFn });
try std.testing.expectEqual(cache.size(), 2); try std.testing.expectEqual(cache.size(), 2);
cache.remove(utils.hashString("my/id")); cache.remove(utils.hashString("my/id"));

14
zig-ecs/src/signals/delegate.zig
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@ -7,8 +7,8 @@ pub fn Delegate(comptime Event: type) type {
ctx_ptr_address: usize = 0, ctx_ptr_address: usize = 0,
callback: union(enum) { callback: union(enum) {
free: fn (Event) void, free: *const fn (Event) void,
bound: fn (usize, Event) void, bound: *const fn (usize, Event) void,
}, },
/// sets a bound function as the Delegate callback /// sets a bound function as the Delegate callback
@ -22,7 +22,7 @@ pub fn Delegate(comptime Event: type) type {
.callback = .{ .callback = .{
.bound = struct { .bound = struct {
fn cb(self: usize, param: Event) void { fn cb(self: usize, param: Event) void {
@call(.{ .modifier = .always_inline }, @field(@intToPtr(T, self), fn_name), .{param}); @call(.always_inline, @field(@intToPtr(T, self), fn_name), .{param});
} }
}.cb, }.cb,
}, },
@ -30,7 +30,7 @@ pub fn Delegate(comptime Event: type) type {
} }
/// sets a free function as the Delegate callback /// sets a free function as the Delegate callback
pub fn initFree(func: fn (Event) void) Self { pub fn initFree(func: *const fn (Event) void) Self {
return Self{ return Self{
.callback = .{ .free = func }, .callback = .{ .free = func },
}; };
@ -38,12 +38,12 @@ pub fn Delegate(comptime Event: type) type {
pub fn trigger(self: Self, param: Event) void { pub fn trigger(self: Self, param: Event) void {
switch (self.callback) { switch (self.callback) {
.free => |func| @call(.{}, func, .{param}), .free => |func| @call(.auto, func, .{param}),
.bound => |func| @call(.{}, func, .{ self.ctx_ptr_address, param }), .bound => |func| @call(.auto, func, .{ self.ctx_ptr_address, param }),
} }
} }
pub fn containsFree(self: Self, callback: fn (Event) void) bool { pub fn containsFree(self: Self, callback: *const fn (Event) void) bool {
return switch (self.callback) { return switch (self.callback) {
.free => |func| func == callback, .free => |func| func == callback,
else => false, else => false,

8
zig-ecs/src/signals/sink.zig
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@ -18,7 +18,7 @@ pub fn Sink(comptime Event: type) type {
return Self{ .insert_index = owning_signal.calls.items.len }; return Self{ .insert_index = owning_signal.calls.items.len };
} }
pub fn before(self: Self, callback: ?fn (Event) void) Self { pub fn before(self: Self, callback: ?*const fn (Event) void) Self {
if (callback) |cb| { if (callback) |cb| {
if (self.indexOf(cb)) |index| { if (self.indexOf(cb)) |index| {
return Self{ .insert_index = index }; return Self{ .insert_index = index };
@ -36,7 +36,7 @@ pub fn Sink(comptime Event: type) type {
return self; return self;
} }
pub fn connect(self: Self, callback: fn (Event) void) void { pub fn connect(self: Self, callback: *const fn (Event) void) void {
std.debug.assert(self.indexOf(callback) == null); std.debug.assert(self.indexOf(callback) == null);
_ = owning_signal.calls.insert(self.insert_index, Delegate(Event).initFree(callback)) catch unreachable; _ = owning_signal.calls.insert(self.insert_index, Delegate(Event).initFree(callback)) catch unreachable;
} }
@ -46,7 +46,7 @@ pub fn Sink(comptime Event: type) type {
_ = owning_signal.calls.insert(self.insert_index, Delegate(Event).initBound(ctx, fn_name)) catch unreachable; _ = owning_signal.calls.insert(self.insert_index, Delegate(Event).initBound(ctx, fn_name)) catch unreachable;
} }
pub fn disconnect(self: Self, callback: fn (Event) void) void { pub fn disconnect(self: Self, callback: *const fn (Event) void) void {
if (self.indexOf(callback)) |index| { if (self.indexOf(callback)) |index| {
_ = owning_signal.calls.swapRemove(index); _ = owning_signal.calls.swapRemove(index);
} }
@ -58,7 +58,7 @@ pub fn Sink(comptime Event: type) type {
} }
} }
fn indexOf(_: Self, callback: fn (Event) void) ?usize { fn indexOf(_: Self, callback: *const fn (Event) void) ?usize {
for (owning_signal.calls.items) |call, i| { for (owning_signal.calls.items) |call, i| {
if (call.containsFree(callback)) { if (call.containsFree(callback)) {
return i; return i;

10
zig-ecs/tests/registry_test.zig
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@ -82,12 +82,12 @@ test "singletons" {
defer reg.deinit(); defer reg.deinit();
var pos = Position{ .x = 5, .y = 5 }; var pos = Position{ .x = 5, .y = 5 };
reg.singletons.add(pos); reg.singletons().add(pos);
try std.testing.expect(reg.singletons.has(Position)); try std.testing.expect(reg.singletons().has(Position));
try std.testing.expectEqual(reg.singletons.get(Position).*, pos); try std.testing.expectEqual(reg.singletons().get(Position).*, pos);
reg.singletons.remove(Position); reg.singletons().remove(Position);
try std.testing.expect(!reg.singletons.has(Position)); try std.testing.expect(!reg.singletons().has(Position));
} }
test "destroy" { test "destroy" {

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