ona/source/coral/slab.zig

57 lines
1.1 KiB
Zig

const debug = @import("./debug.zig");
const io = @import("./io.zig");
// TODO: Finish implementing.
pub fn Map(comptime Index: type, comptime Element: type) type {
return struct {
free_index: Index,
entries: []Entry,
const Entry = union (enum) {
free_index: usize,
element: Element,
};
const Self = @This();
pub fn fetch(self: *Self, index: Index) *Element {
const entry = &self.entries[index];
debug.assert(entry.* == .element);
return &entry.element;
}
pub fn deinit(self: *Self, allocator: io.Allocator) void {
io.deallocate(allocator, self.entries);
}
pub fn init(allocator: io.Allocator) io.AllocationError!Self {
const entries = try io.allocate_many(Entry, 4, allocator);
errdefer io.deallocate(allocator, entries);
return Self{
.free_index = 0,
.entries = entries,
};
}
pub fn insert(self: *Self, allocator: io.Allocator, value: Element) io.AllocationError!Index {
_ = self;
_ = allocator;
_ = value;
return 0;
}
pub fn remove(self: *Self, index: Index) void {
const entry = &self.entries[index];
debug.assert(entry.* == .element);
}
};
}