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
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
//! The change log.


/// Release 0.8.4 (2024-06-23)
///
/// ## Non-breaking changes
///
/// Compilation when targeting Apple's visionos, watchos and tvos targets has been fixed.
pub mod r0_8_4 {}

/// Release 0.8.3 (2024-03-05)
///
/// ## Non-breaking changes
///
/// A `dev-dependency` on `windows-sys` that was unconditionally introduced in
/// [0.8.2](r0_8_2) has been made conditional.
pub mod r0_8_3 {}

/// Release 0.8.2 (2024-03-01)
///
/// ## (Potentially) breaking changes
///
/// MSRV has been increased to 1.56.0. Since both rustc versions are ancient, this has been deemed
/// to not be breaking enough to warrant a semver-breaking release of libloading. If you're stick
/// with a version of rustc older than 1.56.0, lock `libloading` dependency to `0.8.1`.
///
/// ## Non-breaking changes
///
/// * The crate switches the dependency on `windows-sys` to a `windows-target` one for Windows
///   bindings. In order to enable this `libloading` defines any bindings necessary for its operation
///   internally, just like has been done for `unix` targets. This should result in leaner dependency
///   trees.
/// * `os::unix::with_dlerror` has been exposed for the users who need to invoke `dl*` family of
///   functions manually.
pub mod r0_8_2 {}

/// Release 0.8.1 (2023-09-30)
///
/// ## Non-breaking changes
///
/// * Support for GNU Hurd.
pub mod r0_8_1 {}

/// Release 0.8.0 (2023-04-11)
///
/// ## (Potentially) breaking changes
///
/// * `winapi` dependency has been replaced with `windows-sys`.
/// * As a result the MSRV has been increased to 1.48.
///
/// ## Non-breaking changes
///
/// * Support for the QNX Neutrino target has been added.
pub mod r0_8_0 {}

/// Release 0.7.4 (2022-11-07)
///
/// This release has no functional changes.
///
/// `RTLD_LAZY`, `RTLD_GLOBAL` and `RTLD_LOCAL` constants have been implemented for AIX platforms.
pub mod r0_7_4 {}

/// Release 0.7.3 (2022-01-15)
///
/// This release has no functional changes.
///
/// In this release the `docsrs` `cfg` has been renamed to `libloading_docs` to better reflect that
/// this `cfg` is intended to be only used by `libloading` and only specifically for the invocation
/// of `rustdoc` when documenting `libloading`. Setting this `cfg` in any other situation is
/// unsupported and will not work.
pub mod r0_7_3 {}

/// Release 0.7.2 (2021-11-14)
///
/// Cargo.toml now specifies the MSRV bounds, which enables tooling to report an early failure when
/// the version of the toolchain is insufficient. Refer to the [min-rust-version RFC] and its
/// [tracking issue].
///
/// [min-rust-version RFC]: https://rust-lang.github.io/rfcs/2495-min-rust-version.html
/// [tracking issue]: https://github.com/rust-lang/rust/issues/65262
///
/// Additionally, on platforms `libloading` has no support (today: `not(any(unix, windows))`), we
/// will no longer attempt to implement the cross-platform `Library` and `Symbol` types. This makes
/// `libloading` compile on targets such as `wasm32-unknown-unknown` and gives ability to the
/// downstream consumers of this library to decide how they want to handle the absence of the
/// library loading implementation in their code. One of such approaches could be depending on
/// `libloading` itself optionally as such:
///
/// ```toml
/// [target.'cfg(any(unix, windows))'.dependencies.libloading]
/// version = "0.7"
/// ```
pub mod r0_7_2 {}

/// Release 0.7.1 (2021-10-09)
///
/// Significantly improved the consistency and style of the documentation.
pub mod r0_7_1 {}

/// Release 0.7.0 (2021-02-06)
///
/// ## Breaking changes
///
/// ### Loading functions are now `unsafe`
///
/// A number of associated methods involved in loading a library were changed to
/// be `unsafe`. The affected functions are: [`Library::new`], [`os::unix::Library::new`],
/// [`os::unix::Library::open`], [`os::windows::Library::new`],
/// [`os::windows::Library::load_with_flags`]. This is the most prominent breaking change in this
/// release and affects majority of the users of `libloading`.
///
/// In order to see why it was necessary, consider the following snippet of C++ code:
///
/// ```c++
/// #include <vector>
/// #include <iostream>
///
/// static std::vector<unsigned int> UNSHUU = { 1, 2, 3 };
///
/// int main() {
///     std::cout << UNSHUU[0] << UNSHUU[1] << UNSHUU[2] << std::endl; // Prints 123
///     return 0;
/// }
/// ```
///
/// The `std::vector` type, much like in Rust's `Vec`, stores its contents in a buffer allocated on
/// the heap. In this example the vector object itself is stored and initialized as a static
/// variable – a compile time construct. The heap, on the other hand, is a runtime construct. And
/// yet the code works exactly as you'd expect – the vector contains numbers 1, 2 and 3 stored in
/// a buffer on heap. So, _what_ makes it work out, exactly?
///
/// Various executable and shared library formats define conventions and machinery to execute
/// arbitrary code when a program or a shared library is loaded. On systems using the PE format
/// (e.g. Windows) this is available via the optional `DllMain` initializer. Various systems
/// utilizing the ELF format take a slightly different approach of maintaining an array of function
/// pointers in the `.init_array` section. A very similar mechanism exists on systems that utilize
/// the Mach-O format.
///
/// For the C++ program above, the object stored in the `UNSHUU` global variable is constructed
/// by code run as part of such an initializer routine. This initializer is run before the entry
/// point (the `main` function) is executed, allowing for this magical behaviour to be possible.
/// Were the C++ code built as a shared library instead, the initialization routines would run as
/// the resulting shared library is loaded. In case of `libloading` – during the call to
/// `Library::new` and other methods affected by this change.
///
/// These initialization (and very closely related termination) routines can be utilized outside of
/// C++ too. Anybody can build a shared library in variety of different programming languages and
/// set up the initializers to execute arbitrary code. Potentially code that does all sorts of
/// wildly unsound stuff.
///
/// The routines are executed by components that are an integral part of the operating system.
/// Changing or controlling the operation of these components is infeasible. With that in
/// mind, the initializer and termination routines are something anybody loading a library must
/// carefully evaluate the libraries loaded for soundness.
///
/// In practice, a vast majority of the libraries can be considered a good citizen and their
/// initialization and termination routines, if they have any at all, can be trusted to be sound.
///
/// Also see: [issue #86].
///
/// ### Better & more consistent default behaviour on UNIX systems
///
/// On UNIX systems the [`Library::new`], [`os::unix::Library::new`] and
/// [`os::unix::Library::this`] methods have been changed to use
/// <code>[RTLD_LAZY] | [RTLD_LOCAL]</code> as the default set of loader options (previously:
/// [`RTLD_NOW`]). This has a couple benefits. Namely:
///
/// * Lazy binding is generally quicker to execute when only a subset of symbols from a library are
///   used and is typically the default when neither `RTLD_LAZY` nor `RTLD_NOW` are specified when
///   calling the underlying `dlopen` API;
/// * On most UNIX systems (macOS being a notable exception) `RTLD_LOCAL` is the default when
///   neither `RTLD_LOCAL` nor [`RTLD_GLOBAL`] are specified. The explicit setting of the
///   `RTLD_LOCAL` flag makes this behaviour consistent across platforms.
///
/// ### Dropped support for Windows XP/Vista
///
/// The (broken) support for Windows XP and Windows Vista environments was removed. This was
/// prompted primarily by a similar policy change in the [Rust
/// project](https://github.com/rust-lang/compiler-team/issues/378) but also as an acknowledgement
/// to the fact that `libloading` never worked in these environments anyway.
///
/// ### More accurate error variant names
///
/// Finally, the `Error::LoadLibraryW` renamed to [`Error::LoadLibraryExW`] to more accurately
/// represent the underlying API that's failing. No functional changes as part of this rename
/// intended.
///
/// [issue #86]: https://github.com/nagisa/rust_libloading/issues/86
/// [`Library::new`]: crate::Library::new
/// [`Error::LoadLibraryExW`]: crate::Error::LoadLibraryExW
/// [`os::unix::Library::this`]: crate::os::unix::Library::this
/// [`os::unix::Library::new`]: crate::os::unix::Library::new
/// [`os::unix::Library::open`]: crate::os::unix::Library::new
/// [`os::windows::Library::new`]: crate::os::windows::Library::new
/// [`os::windows::Library::load_with_flags`]: crate::os::windows::Library::load_with_flags
/// [`RTLD_NOW`]: crate::os::unix::RTLD_NOW
/// [RTLD_LAZY]: crate::os::unix::RTLD_LAZY
/// [RTLD_LOCAL]: crate::os::unix::RTLD_LOCAL
/// [`RTLD_GLOBAL`]: crate::os::unix::RTLD_GLOBAL
pub mod r0_7_0 {}

/// Release 0.6.7 (2021-01-14)
///
/// * Added a [`os::windows::Library::open_already_loaded`] to obtain a handle to a library that
///   must already be loaded. There is no portable equivalent for all UNIX targets. Users who do
///   not care about portability across UNIX platforms may use [`os::unix::Library::open`] with
///   `libc::RTLD_NOLOAD`;
///
/// [`os::windows::Library::open_already_loaded`]: crate::os::windows::Library::open_already_loaded
/// [`os::unix::Library::open`]: crate::os::unix::Library::open
pub mod r0_6_7 {}

/// Release 0.6.6 (2020-12-03)
///
/// * Fix a double-release of resources when [`Library::close`] or [`os::windows::Library::close`]
///   is used on Windows.
///
/// [`Library::close`]: crate::Library::close
/// [`os::windows::Library::close`]: crate::os::windows::Library::close
pub mod r0_6_6 {}

/// Release 0.6.5 (2020-10-23)
///
/// * Upgrade cfg-if 0.1 to 1.0
pub mod r0_6_5 {}

/// Release 0.6.4 (2020-10-10)
///
/// * Remove use of `build.rs` making it easier to build `libloading` without cargo. It also
///   almost halves the build time of this crate.
pub mod r0_6_4 {}

/// Release 0.6.3 (2020-08-22)
///
/// * Improve documentation, allowing to view all of the os-specific functionality from
///   documentation generated for any target;
/// * Add [`os::windows::Library::this`];
/// * Added constants to use with OS-specific `Library::open`;
/// * Add [`library_filename`].
///
/// [`os::windows::Library::this`]: crate::os::windows::Library::this
/// [`library_filename`]: crate::library_filename
pub mod r0_6_3 {}

/// Release 0.6.2 (2020-05-06)
///
/// * Fixed building of this library on Illumos.
pub mod r0_6_2 {}

/// Release 0.6.1 (2020-04-15)
///
/// * Introduced a new method [`os::windows::Library::load_with_flags`];
/// * Added support for the Illumos triple.
///
/// [`os::windows::Library::load_with_flags`]: crate::os::windows::Library::load_with_flags
pub mod r0_6_1 {}

/// Release 0.6.0 (2020-04-05)
///
/// * Introduced a new method [`os::unix::Library::get_singlethreaded`];
/// * Added (untested) support for building when targeting Redox and Fuchsia;
/// * The APIs exposed by this library no longer panic and instead return an `Err` when it used
///   to panic.
///
/// ## Breaking changes
///
/// * Minimum required (stable) version of Rust to build this library is now 1.40.0;
/// * This crate now implements a custom [`Error`] type and all APIs now return this type rather
///   than returning the `std::io::Error`;
/// * `libloading::Result` has been removed;
/// * Removed the dependency on the C compiler to build this library on UNIX-like platforms.
///   `libloading` used to utilize a snippet written in C to work-around the unlikely possibility
///   of the target having a thread-unsafe implementation of the `dlerror` function. The effect of
///   the work-around was very opportunistic: it would not work if the function was called by
///   forgoing `libloading`.
///
///   Starting with 0.6.0, [`Library::get`] on platforms where `dlerror` is not MT-safe (such as
///   FreeBSD, DragonflyBSD or NetBSD) will unconditionally return an error when the underlying
///   `dlsym` returns a null pointer. For the use-cases where loading null pointers is necessary
///   consider using [`os::unix::Library::get_singlethreaded`] instead.
///
/// [`Library::get`]: crate::Library::get
/// [`os::unix::Library::get_singlethreaded`]: crate::os::unix::Library::get_singlethreaded
/// [`Error`]: crate::Error
pub mod r0_6_0 {}

/// Release 0.5.2 (2019-07-07)
///
/// * Added API to convert OS-specific `Library` and `Symbol` conversion to underlying resources.
pub mod r0_5_2 {}

/// Release 0.5.1 (2019-06-01)
///
/// * Build on Haiku targets.
pub mod r0_5_1 {}

/// Release 0.5.0 (2018-01-11)
///
/// * Update to `winapi = ^0.3`;
///
/// ## Breaking changes
///
/// * libloading now requires a C compiler to build on UNIX;
///   * This is a temporary measure until the [`linkage`] attribute is stabilised;
///   * Necessary to resolve [#32].
///
/// [`linkage`]: https://github.com/rust-lang/rust/issues/29603
/// [#32]: https://github.com/nagisa/rust_libloading/issues/32
pub mod r0_5_0 {}

/// Release 0.4.3 (2017-12-07)
///
/// * Bump lazy-static dependency to `^1.0`;
/// * `cargo test --release` now works when testing libloading.
pub mod r0_4_3 {}

/// Release 0.4.2 (2017-09-24)
///
/// * Improved error and race-condition handling on Windows;
/// * Improved documentation about thread-safety of Library;
/// * Added `Symbol::<Option<T>::lift_option() -> Option<Symbol<T>>` convenience method.
pub mod r0_4_2 {}

/// Release 0.4.1 (2017-08-29)
///
/// * Solaris support
pub mod r0_4_1 {}

/// Release 0.4.0 (2017-05-01)
///
/// * Remove build-time dependency on target_build_utils (and by extension serde/phf);
/// * Require at least version 1.14.0 of rustc to build;
///   * Actually, it is cargo which has to be more recent here. The one shipped with rustc 1.14.0
///     is what’s being required from now on.
pub mod r0_4_0 {}

/// Release 0.3.4 (2017-03-25)
///
/// * Remove rogue println!
pub mod r0_3_4 {}

/// Release 0.3.3 (2017-03-25)
///
/// * Panics when `Library::get` is called for incompatibly sized type such as named function
///   types (which are zero-sized).
pub mod r0_3_3 {}

/// Release 0.3.2 (2017-02-10)
///
/// * Minimum version required is now rustc 1.12.0;
/// * Updated dependency versions (most notably target_build_utils to 0.3.0)
pub mod r0_3_2 {}

/// Release 0.3.1 (2016-10-01)
///
/// * `Symbol<T>` and `os::*::Symbol<T>` now implement `Send` where `T: Send`;
/// * `Symbol<T>` and `os::*::Symbol<T>` now implement `Sync` where `T: Sync`;
/// * `Library` and `os::*::Library` now implement `Sync` (they were `Send` in 0.3.0 already).
pub mod r0_3_1 {}

/// Release 0.3.0 (2016-07-27)
///
/// * Greatly improved documentation, especially around platform-specific behaviours;
/// * Improved test suite by building our own library to test against;
/// * All `Library`-ies now implement `Send`.
/// * Added `impl From<os::platform::Library> for Library` and `impl From<Library> for
///   os::platform::Library` allowing wrapping and extracting the platform-specific library handle;
/// * Added methods to wrap (`Symbol::from_raw`) and unwrap (`Symbol::into_raw`) the safe `Symbol`
///   wrapper into unsafe `os::platform::Symbol`.
///
/// The last two additions focus on not restricting potential usecases of this library, allowing
/// users of the library to circumvent safety checks if need be.
///
/// ## Breaking Changes
///
/// `Library::new` defaults to `RTLD_NOW` instead of `RTLD_LAZY` on UNIX for more consistent
/// cross-platform behaviour. If a library loaded with `Library::new` had any linking errors, but
/// unresolved references weren’t forced to be resolved, the library would’ve “just worked”,
/// whereas now the call to `Library::new` will return an error signifying presence of such error.
///
/// ## os::platform
/// * Added `os::unix::Library::open` which allows specifying arbitrary flags (e.g. `RTLD_LAZY`);
/// * Added `os::windows::Library::get_ordinal` which allows finding a function or variable by its
///   ordinal number;
pub mod r0_3_0 {}