blob: bf489b25b1ba7f07601b657b5c1c7475ede5de63 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
# Changelog
## Unreleased
-
## 1.17.1
- Make `OnceRef` implementation compliant with [strict provenance](https://github.com/rust-lang/rust/issues/95228).
## 1.17.0
- Add `race::OnceRef` for storing a `&'a T`.
## 1.16.0
- Add `no_std` implementation based on `critical-section`,
[#195](https://github.com/matklad/once_cell/pull/195).
- Deprecate `atomic-polyfill` feature (use the new `critical-section` instead)
## 1.15.0
- Increase minimal supported Rust version to 1.56.0.
- Implement `UnwindSafe` even if the `std` feature is disabled.
## 1.14.0
- Add extension to `unsync` and `sync` `Lazy` mut API:
- `force_mut`
- `get_mut`
## 1.13.1
- Make implementation compliant with [strict provenance](https://github.com/rust-lang/rust/issues/95228).
- Upgrade `atomic-polyfill` to `1.0`
## 1.13.0
- Add `Lazy::get`, similar to `OnceCell::get`.
## 1.12.1
- Remove incorrect `debug_assert`.
## 1.12.0
- Add `OnceCell::wait`, a blocking variant of `get`.
## 1.11.0
- Add `OnceCell::with_value` to create initialized `OnceCell` in `const` context.
- Improve `Clone` implementation for `OnceCell`.
- Rewrite `parking_lot` version on top of `parking_lot_core`, for even smaller cells!
## 1.10.0
- upgrade `parking_lot` to `0.12.0` (note that this bumps MSRV with `parking_lot` feature enabled to `1.49.0`).
## 1.9.0
- Added an `atomic-polyfill` optional dependency to compile `race` on platforms without atomics
## 1.8.0
- Add `try_insert` API -- a version of `set` that returns a reference.
## 1.7.2
- Improve code size when using parking_lot feature.
## 1.7.1
- Fix `race::OnceBox<T>` to also impl `Default` even if `T` doesn't impl `Default`.
## 1.7.0
- Hide the `race` module behind (default) `race` feature.
Turns out that adding `race` by default was a breaking change on some platforms without atomics.
In this release, we make the module opt-out.
Technically, this is a breaking change for those who use `race` with `no_default_features`.
Given that the `race` module itself only several days old, the breakage is deemed acceptable.
## 1.6.0
- Add `Lazy::into_value`
- Stabilize `once_cell::race` module for "first one wins" no_std-compatible initialization flavor.
- Migrate from deprecated `compare_and_swap` to `compare_exchange`.
## 1.5.2
- `OnceBox` API uses `Box<T>`.
This a breaking change to unstable API.
## 1.5.1
- MSRV is increased to `1.36.0`.
- document `once_cell::race` module.
- introduce `alloc` feature for `OnceBox`.
- fix `OnceBox::set`.
## 1.5.0
- add new `once_cell::race` module for "first one wins" no_std-compatible initialization flavor.
The API is provisional, subject to change and is gated by the `unstable` cargo feature.
## 1.4.1
- upgrade `parking_lot` to `0.11.0`
- make `sync::OnceCell<T>` pass https://doc.rust-lang.org/nomicon/dropck.html#an-escape-hatch[dropck] with `parking_lot` feature enabled.
This fixes a (minor) semver-incompatible changed introduced in `1.4.0`
## 1.4.0
- upgrade `parking_lot` to `0.10` (note that this bumps MSRV with `parking_lot` feature enabled to `1.36.0`).
- add `OnceCell::take`.
- upgrade crossbeam utils (private dependency) to `0.7`.
## 1.3.1
- remove unnecessary `F: fmt::Debug` bound from `impl fmt::Debug for Lazy<T, F>`.
## 1.3.0
- `Lazy<T>` now implements `DerefMut`.
- update implementation according to the latest changes in `std`.
## 1.2.0
- add `sync::OnceCell::get_unchecked`.
## 1.1.0
- implement `Default` for `Lazy`: it creates an empty `Lazy<T>` which is initialized with `T::default` on first access.
- add `OnceCell::get_mut`.
## 1.0.2
- actually add `#![no_std]` attribute if std feature is not enabled.
## 1.0.1
- fix unsoundness in `Lazy<T>` if the initializing function panics. Thanks [@xfix](https://github.com/xfix)!
- implement `RefUnwindSafe` for `Lazy`.
- share more code between `std` and `parking_lot` implementations.
- add F.A.Q section to the docs.
## 1.0.0
- remove `parking_lot` from the list of default features.
- add `std` default feature. Without `std`, only `unsync` module is supported.
- implement `Eq` for `OnceCell`.
- fix wrong `Sync` bound on `sync::Lazy`.
- run the whole test suite with miri.
## 0.2.7
- New implementation of `sync::OnceCell` if `parking_lot` feature is disabled.
It now employs a hand-rolled variant of `std::sync::Once`.
- `sync::OnceCell::get_or_try_init` works without `parking_lot` as well!
- document the effects of `parking_lot` feature: same performance but smaller types.
## 0.2.6
- Updated `Lazy`'s `Deref` impl to requires only `FnOnce` instead of `Fn`
## 0.2.5
- `Lazy` requires only `FnOnce` instead of `Fn`
## 0.2.4
- nicer `fmt::Debug` implementation
## 0.2.3
- update `parking_lot` to `0.9.0`
- fix stacked borrows violation in `unsync::OnceCell::get`
- implement `Clone` for `sync::OnceCell<T> where T: Clone`
## 0.2.2
- add `OnceCell::into_inner` which consumes a cell and returns an option
## 0.2.1
- implement `sync::OnceCell::get_or_try_init` if `parking_lot` feature is enabled
- switch internal `unsafe` implementation of `sync::OnceCell` from `Once` to `Mutex`
- `sync::OnceCell::get_or_init` is twice as fast if cell is already initialized
- implement `std::panic::RefUnwindSafe` and `std::panic::UnwindSafe` for `OnceCell`
- better document behavior around panics
## 0.2.0
- MSRV is now 1.31.1
- `Lazy::new` and `OnceCell::new` are now const-fns
- `unsync_lazy` and `sync_lazy` macros are removed
## 0.1.8
- update crossbeam-utils to 0.6
- enable bors-ng
## 0.1.7
- cells implement `PartialEq` and `From`
- MSRV is down to 1.24.1
- update `parking_lot` to `0.7.1`
## 0.1.6
- `unsync::OnceCell<T>` is `Clone` if `T` is `Clone`.
## 0.1.5
- No changelog until this point :(
|
