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terminal: RefCountedSet has Context variant methods

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This commit is contained in:
Mitchell Hashimoto
2024-07-03 18:23:46 -07:00
parent cb1caff018
commit 2e41afc787
1 changed files with 21 additions and 15 deletions
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36
src/terminal/ref_counted_set.zig
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@ -205,12 +205,15 @@ pub fn RefCountedSet(
///
/// If the set has no more room, then an OutOfMemory error is returned.
pub fn add(self: *Self, base: anytype, value: T) AddError!Id {
return try self.addContext(base, value, self.context);
}
pub fn addContext(self: *Self, base: anytype, value: T, ctx: Context) AddError!Id {
const items = self.items.ptr(base);
// Trim dead items from the end of the list.
while (self.next_id > 1 and items[self.next_id - 1].meta.ref == 0) {
self.next_id -= 1;
self.deleteItem(base, self.next_id);
self.deleteItem(base, self.next_id, ctx);
}
// If we still don't have an available ID, we can't continue.
@ -232,7 +235,7 @@ pub fn RefCountedSet(
return AddError.OutOfMemory;
}
const id = self.upsert(base, value, self.next_id);
const id = self.upsert(base, value, self.next_id, ctx);
items[id].meta.ref += 1;
if (id == self.next_id) self.next_id += 1;
@ -251,27 +254,30 @@ pub fn RefCountedSet(
///
/// If the set has no more room, then an OutOfMemory error is returned.
pub fn addWithId(self: *Self, base: anytype, value: T, id: Id) AddError!?Id {
return try self.addWithIdContext(base, value, id, self.context);
}
pub fn addWithIdContext(self: *Self, base: anytype, value: T, id: Id, ctx: Context) AddError!?Id {
const items = self.items.ptr(base);
if (id < self.next_id) {
if (items[id].meta.ref == 0) {
self.deleteItem(base, id);
self.deleteItem(base, id, ctx);
const added_id = self.upsert(base, value, id);
const added_id = self.upsert(base, value, id, ctx);
items[added_id].meta.ref += 1;
self.living += 1;
return if (added_id == id) null else added_id;
} else if (self.context.eql(base, value, items[id].value)) {
} else if (ctx.eql(base, value, items[id].value)) {
items[id].meta.ref += 1;
return null;
}
}
return try self.add(base, value);
return try self.addContext(base, value, ctx);
}
/// Increment an item's reference count by 1.
@ -377,7 +383,7 @@ pub fn RefCountedSet(
/// Delete an item, removing any references from
/// the table, and freeing its ID to be re-used.
fn deleteItem(self: *Self, base: anytype, id: Id) void {
fn deleteItem(self: *Self, base: anytype, id: Id, ctx: Context) void {
const table = self.table.ptr(base);
const items = self.items.ptr(base);
@ -390,7 +396,7 @@ pub fn RefCountedSet(
if (comptime @hasDecl(Context, "deleted")) {
// Inform the context struct that we're
// deleting the dead item's value for good.
self.context.deleted(base, item.value);
ctx.deleted(base, item.value);
}
self.psl_stats[item.meta.psl] -= 1;
@ -419,11 +425,11 @@ pub fn RefCountedSet(
/// Find an item in the table and return its ID.
/// If the item does not exist in the table, null is returned.
fn lookup(self: *Self, base: anytype, value: T) ?Id {
fn lookup(self: *Self, base: anytype, value: T, ctx: Context) ?Id {
const table = self.table.ptr(base);
const items = self.items.ptr(base);
const hash: u64 = self.context.hash(base, value);
const hash: u64 = ctx.hash(base, value);
for (0..self.max_psl + 1) |i| {
const p: usize = @intCast((hash + i) & self.layout.table_mask);
@ -455,7 +461,7 @@ pub fn RefCountedSet(
// If the item is a part of the same probe sequence,
// we check if it matches the value we're looking for.
if (item.meta.psl == i and
self.context.eql(base, value, item.value))
ctx.eql(base, value, item.value))
{
return id;
}
@ -468,9 +474,9 @@ pub fn RefCountedSet(
/// for it if not present. If a new item is added, `new_id` will
/// be used as the ID. If an existing item is found, the `new_id`
/// is ignored and the existing item's ID is returned.
fn upsert(self: *Self, base: anytype, value: T, new_id: Id) Id {
fn upsert(self: *Self, base: anytype, value: T, new_id: Id, ctx: Context) Id {
// If the item already exists, return it.
if (self.lookup(base, value)) |id| return id;
if (self.lookup(base, value, ctx)) |id| return id;
const table = self.table.ptr(base);
const items = self.items.ptr(base);
@ -481,7 +487,7 @@ pub fn RefCountedSet(
.meta = .{ .psl = 0, .ref = 0 },
};
const hash: u64 = self.context.hash(base, value);
const hash: u64 = ctx.hash(base, value);
var held_id: Id = new_id;
var held_item: *Item = &new_item;
@ -510,7 +516,7 @@ pub fn RefCountedSet(
if (comptime @hasDecl(Context, "deleted")) {
// Inform the context struct that we're
// deleting the dead item's value for good.
self.context.deleted(base, item.value);
ctx.deleted(base, item.value);
}
chosen_id = id;