objc2-metal-performance-shaders 0.3.2

Bindings to the MetalPerformanceShaders framework
Documentation
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
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
//! This file has been automatically generated by `objc2`'s `header-translator`.
//! DO NOT EDIT
use core::ffi::*;
use core::ptr::NonNull;
use objc2::__framework_prelude::*;
use objc2_foundation::*;
use objc2_metal::*;

use crate::*;

extern_class!(
    /// Dependencies: This depends on Metal.framework.
    ///
    /// The MPSCNNDropoutGradientState is used to hold the mask used by both
    /// MPSCNNDropout forward filter and MPSCNNDropoutGradient backward filter.
    /// The MPSCNNDropout forward filter populates the MPSCNNDropoutGradientState
    /// object and the MPSCNNDropoutGradient backward filter consumes the state
    /// object.
    ///
    /// While the mask is stored internally, the mask data is accessible by the
    /// user for debugging purposes via an accessor method.
    ///
    /// See also [Apple's documentation](https://developer.apple.com/documentation/metalperformanceshaders/mpscnndropoutgradientstate?language=objc)
    #[unsafe(super(MPSNNGradientState, MPSState, NSObject))]
    #[derive(Debug, PartialEq, Eq, Hash)]
    #[cfg(all(
        feature = "MPSCore",
        feature = "MPSNNGradientState",
        feature = "MPSState"
    ))]
    pub struct MPSCNNDropoutGradientState;
);

#[cfg(all(
    feature = "MPSCore",
    feature = "MPSNNGradientState",
    feature = "MPSState"
))]
extern_conformance!(
    unsafe impl NSObjectProtocol for MPSCNNDropoutGradientState {}
);

#[cfg(all(
    feature = "MPSCore",
    feature = "MPSNNGradientState",
    feature = "MPSState"
))]
impl MPSCNNDropoutGradientState {
    extern_methods!(
        #[unsafe(method(init))]
        #[unsafe(method_family = init)]
        pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>;

        /// Mask data accessor method.
        ///
        /// Returns: An autoreleased NSData object, containing the mask data.
        /// The mask data is populated in the -encode call, thus the contents
        /// are undefined until you -encode the filter.
        /// Use for debugging purposes only.
        ///
        /// In order to gaurantee that the mask data is correctly synchronized for CPU side access,
        /// it is the application's responsibility to call the [gradientState synchronizeOnCommandBuffer:]
        /// method before accessing the mask data.
        #[unsafe(method(maskData))]
        #[unsafe(method_family = none)]
        pub unsafe fn maskData(&self) -> Retained<NSData>;
    );
}

/// Methods declared on superclass `MPSState`.
#[cfg(all(
    feature = "MPSCore",
    feature = "MPSNNGradientState",
    feature = "MPSState"
))]
impl MPSCNNDropoutGradientState {
    extern_methods!(
        /// Create a MPSState holding a temporary MTLBuffer
        ///
        /// Parameter `cmdBuf`: The command buffer against which the temporary resource is allocated
        ///
        /// Parameter `bufferSize`: The size of the buffer in bytes
        #[unsafe(method(temporaryStateWithCommandBuffer:bufferSize:))]
        #[unsafe(method_family = none)]
        pub unsafe fn temporaryStateWithCommandBuffer_bufferSize(
            cmd_buf: &ProtocolObject<dyn MTLCommandBuffer>,
            buffer_size: usize,
        ) -> Retained<Self>;

        /// Create a MPSState holding a temporary MTLTexture
        ///
        /// Parameter `cmdBuf`: The command buffer against which the temporary resource is allocated
        ///
        /// Parameter `descriptor`: A descriptor for the new temporary texture
        #[unsafe(method(temporaryStateWithCommandBuffer:textureDescriptor:))]
        #[unsafe(method_family = none)]
        pub unsafe fn temporaryStateWithCommandBuffer_textureDescriptor(
            cmd_buf: &ProtocolObject<dyn MTLCommandBuffer>,
            descriptor: &MTLTextureDescriptor,
        ) -> Retained<Self>;

        /// Create a new autoreleased temporary state object without underlying resource
        ///
        /// Parameter `cmdBuf`: The command buffer with which the temporary resource is associated
        #[unsafe(method(temporaryStateWithCommandBuffer:))]
        #[unsafe(method_family = none)]
        pub unsafe fn temporaryStateWithCommandBuffer(
            cmd_buf: &ProtocolObject<dyn MTLCommandBuffer>,
        ) -> Retained<Self>;

        #[unsafe(method(initWithDevice:bufferSize:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithDevice_bufferSize(
            this: Allocated<Self>,
            device: &ProtocolObject<dyn MTLDevice>,
            buffer_size: usize,
        ) -> Retained<Self>;

        #[unsafe(method(initWithDevice:textureDescriptor:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithDevice_textureDescriptor(
            this: Allocated<Self>,
            device: &ProtocolObject<dyn MTLDevice>,
            descriptor: &MTLTextureDescriptor,
        ) -> Retained<Self>;

        /// Create a MPSState with a non-temporary MTLResource
        ///
        /// Parameter `resource`: A MTLBuffer or MTLTexture. May be nil.
        ///
        /// # Safety
        ///
        /// - `resource` may need to be synchronized.
        /// - `resource` may be unretained, you must ensure it is kept alive while in use.
        #[unsafe(method(initWithResource:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithResource(
            this: Allocated<Self>,
            resource: Option<&ProtocolObject<dyn MTLResource>>,
        ) -> Retained<Self>;

        /// Initialize a non-temporary state to hold a number of textures and buffers
        ///
        /// The allocation of each resource will be deferred  until it is needed.
        /// This occurs when -resource or -resourceAtIndex: is called.
        ///
        /// Parameter `resourceList`: The list of resources to create.
        #[unsafe(method(initWithDevice:resourceList:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithDevice_resourceList(
            this: Allocated<Self>,
            device: &ProtocolObject<dyn MTLDevice>,
            resource_list: &MPSStateResourceList,
        ) -> Retained<Self>;

        /// Initialize a temporary state to hold a number of textures and buffers
        ///
        /// The textures occur first in sequence
        #[unsafe(method(temporaryStateWithCommandBuffer:resourceList:))]
        #[unsafe(method_family = none)]
        pub unsafe fn temporaryStateWithCommandBuffer_resourceList(
            command_buffer: &ProtocolObject<dyn MTLCommandBuffer>,
            resource_list: &MPSStateResourceList,
        ) -> Retained<Self>;

        /// Create a state object with a list of MTLResources
        ///
        /// Because MPS prefers deferred allocation of resources
        /// your application should use -initWithTextures:bufferSizes:bufferCount:
        /// whenever possible. This method is useful for cases when the
        /// MTLResources must be initialized by the CPU.
        ///
        /// # Safety
        ///
        /// - `resources` generic may need to be synchronized.
        /// - `resources` generic may be unretained, you must ensure it is kept alive while in use.
        #[unsafe(method(initWithResources:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithResources(
            this: Allocated<Self>,
            resources: Option<&NSArray<ProtocolObject<dyn MTLResource>>>,
        ) -> Retained<Self>;
    );
}

/// Methods declared on superclass `NSObject`.
#[cfg(all(
    feature = "MPSCore",
    feature = "MPSNNGradientState",
    feature = "MPSState"
))]
impl MPSCNNDropoutGradientState {
    extern_methods!(
        #[unsafe(method(new))]
        #[unsafe(method_family = new)]
        pub unsafe fn new() -> Retained<Self>;
    );
}

/// [Apple's documentation](https://developer.apple.com/documentation/metalperformanceshaders/mpscnndropoutgradientstatebatch?language=objc)
#[cfg(all(
    feature = "MPSCore",
    feature = "MPSNNGradientState",
    feature = "MPSState"
))]
pub type MPSCNNDropoutGradientStateBatch = NSArray<MPSCNNDropoutGradientState>;

extern_class!(
    /// Dependencies: This depends on Metal.framework
    ///
    /// Dropout is a regularization technique used to prevent neural networks from
    /// overfitting during training. With probability keepProbability, this filter
    /// outputs the input element scaled by 1 / keepProbability. Otherwise, it
    /// outputs 0. Each input element is kept or dropped independently. The scaling
    /// is performed to keep the energy of the output unchanged.
    ///
    /// See also [Apple's documentation](https://developer.apple.com/documentation/metalperformanceshaders/mpscnndropout?language=objc)
    #[unsafe(super(MPSCNNKernel, MPSKernel, NSObject))]
    #[derive(Debug, PartialEq, Eq, Hash)]
    #[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
    pub struct MPSCNNDropout;
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSCoding for MPSCNNDropout {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSCopying for MPSCNNDropout {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
unsafe impl CopyingHelper for MPSCNNDropout {
    type Result = Self;
}

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSObjectProtocol for MPSCNNDropout {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSSecureCoding for MPSCNNDropout {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
impl MPSCNNDropout {
    extern_methods!(
        /// The probability that each element in the input is kept.
        /// The valid range is (0.0f, 1.0f).
        #[unsafe(method(keepProbability))]
        #[unsafe(method_family = none)]
        pub unsafe fn keepProbability(&self) -> c_float;

        /// The seed used to generate random numbers.
        #[unsafe(method(seed))]
        #[unsafe(method_family = none)]
        pub unsafe fn seed(&self) -> NSUInteger;

        /// The mask stride in the x, y, and x dimensions, which
        /// allows for the broadcasting the mask data.
        ///
        /// The only valid values are 0 and 1 for each dimension.
        /// For no broadcasting, set the values for each dimension
        /// to 1. For broadcasting, set desired values to 0.
        #[unsafe(method(maskStrideInPixels))]
        #[unsafe(method_family = none)]
        pub unsafe fn maskStrideInPixels(&self) -> MTLSize;

        #[unsafe(method(initWithDevice:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithDevice(
            this: Allocated<Self>,
            device: &ProtocolObject<dyn MTLDevice>,
        ) -> Retained<Self>;

        /// <NSSecureCoding
        /// > support
        ///
        /// # Safety
        ///
        /// `a_decoder` possibly has further requirements.
        #[unsafe(method(initWithCoder:device:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithCoder_device(
            this: Allocated<Self>,
            a_decoder: &NSCoder,
            device: &ProtocolObject<dyn MTLDevice>,
        ) -> Option<Retained<Self>>;

        /// Standard init with default properties per filter type.
        ///
        /// Parameter `device`: The device that the filter will be used on.
        ///
        /// Parameter `keepProbability`: The probability that each element in the input is kept.
        /// The valid range is (0.0f, 1.0f).
        ///
        /// Parameter `seed`: The seed used to generate random numbers.
        ///
        /// Parameter `maskStrideInPixels`: The mask stride in the x, y, and z dimensions, which
        /// allows for the broadcasting of mask data. The only valid
        /// values are 0 and 1 for each dimension. For no
        /// broadcasting, set the values for each dimension to 1.
        /// For broadcasting, set desired values to 0.
        ///
        /// Returns: A valid MPSCNNDropout object or nil, if failure.
        #[unsafe(method(initWithDevice:keepProbability:seed:maskStrideInPixels:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithDevice_keepProbability_seed_maskStrideInPixels(
            this: Allocated<Self>,
            device: &ProtocolObject<dyn MTLDevice>,
            keep_probability: c_float,
            seed: NSUInteger,
            mask_stride_in_pixels: MTLSize,
        ) -> Retained<Self>;

        #[cfg(all(
            feature = "MPSImage",
            feature = "MPSNNGradientState",
            feature = "MPSState"
        ))]
        #[unsafe(method(resultStateForSourceImage:sourceStates:destinationImage:))]
        #[unsafe(method_family = none)]
        pub unsafe fn resultStateForSourceImage_sourceStates_destinationImage(
            &self,
            source_image: &MPSImage,
            source_states: Option<&NSArray<MPSState>>,
            destination_image: &MPSImage,
        ) -> Option<Retained<MPSCNNDropoutGradientState>>;

        #[cfg(all(
            feature = "MPSImage",
            feature = "MPSNDArray",
            feature = "MPSNNGradientState",
            feature = "MPSState"
        ))]
        #[unsafe(method(resultStateBatchForSourceImage:sourceStates:destinationImage:))]
        #[unsafe(method_family = none)]
        pub unsafe fn resultStateBatchForSourceImage_sourceStates_destinationImage(
            &self,
            source_image: &MPSImageBatch,
            source_states: Option<&NSArray<MPSStateBatch>>,
            destination_image: &MPSImageBatch,
        ) -> Option<Retained<MPSCNNDropoutGradientState>>;

        #[cfg(all(
            feature = "MPSImage",
            feature = "MPSNNGradientState",
            feature = "MPSState"
        ))]
        #[unsafe(method(temporaryResultStateForCommandBuffer:sourceImage:sourceStates:destinationImage:))]
        #[unsafe(method_family = none)]
        pub unsafe fn temporaryResultStateForCommandBuffer_sourceImage_sourceStates_destinationImage(
            &self,
            command_buffer: &ProtocolObject<dyn MTLCommandBuffer>,
            source_image: &MPSImage,
            source_states: Option<&NSArray<MPSState>>,
            destination_image: &MPSImage,
        ) -> Option<Retained<MPSCNNDropoutGradientState>>;

        #[cfg(all(
            feature = "MPSImage",
            feature = "MPSNDArray",
            feature = "MPSNNGradientState",
            feature = "MPSState"
        ))]
        #[unsafe(method(temporaryResultStateBatchForCommandBuffer:sourceImage:sourceStates:destinationImage:))]
        #[unsafe(method_family = none)]
        pub unsafe fn temporaryResultStateBatchForCommandBuffer_sourceImage_sourceStates_destinationImage(
            &self,
            command_buffer: &ProtocolObject<dyn MTLCommandBuffer>,
            source_image: &MPSImageBatch,
            source_states: Option<&NSArray<MPSStateBatch>>,
            destination_image: &MPSImageBatch,
        ) -> Option<Retained<MPSCNNDropoutGradientStateBatch>>;
    );
}

/// Methods declared on superclass `MPSKernel`.
#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
impl MPSCNNDropout {
    extern_methods!(
        /// Called by NSCoder to decode MPSKernels
        ///
        /// This isn't the right interface to decode a MPSKernel, but
        /// it is the one that NSCoder uses. To enable your NSCoder
        /// (e.g. NSKeyedUnarchiver) to set which device to use
        /// extend the object to adopt the MPSDeviceProvider
        /// protocol. Otherwise, the Metal system default device
        /// will be used.
        ///
        /// # Safety
        ///
        /// `a_decoder` possibly has further requirements.
        #[unsafe(method(initWithCoder:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithCoder(
            this: Allocated<Self>,
            a_decoder: &NSCoder,
        ) -> Option<Retained<Self>>;
    );
}

/// Methods declared on superclass `NSObject`.
#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
impl MPSCNNDropout {
    extern_methods!(
        #[unsafe(method(init))]
        #[unsafe(method_family = init)]
        pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>;

        #[unsafe(method(new))]
        #[unsafe(method_family = new)]
        pub unsafe fn new() -> Retained<Self>;
    );
}

extern_class!(
    /// Dependencies: This depends on Metal.framework
    ///
    /// This filter is the backward filter for the MPSCNNDropout forward filter.
    /// It requires the mask data, along with all the associated parameters used
    /// to generate the mask, from the forward pass. The mask is associated with
    /// a MPSCNNDropoutGradientState object.
    ///
    /// In this kernel, use the secondaryOffset to apply an offset to the mask data.
    ///
    /// See also [Apple's documentation](https://developer.apple.com/documentation/metalperformanceshaders/mpscnndropoutgradient?language=objc)
    #[unsafe(super(MPSCNNGradientKernel, MPSCNNBinaryKernel, MPSKernel, NSObject))]
    #[derive(Debug, PartialEq, Eq, Hash)]
    #[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
    pub struct MPSCNNDropoutGradient;
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSCoding for MPSCNNDropoutGradient {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSCopying for MPSCNNDropoutGradient {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
unsafe impl CopyingHelper for MPSCNNDropoutGradient {
    type Result = Self;
}

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSObjectProtocol for MPSCNNDropoutGradient {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
extern_conformance!(
    unsafe impl NSSecureCoding for MPSCNNDropoutGradient {}
);

#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
impl MPSCNNDropoutGradient {
    extern_methods!(
        /// The probability that each element in the input is kept.
        /// The valid range is (0.0f, 1.0f).
        #[unsafe(method(keepProbability))]
        #[unsafe(method_family = none)]
        pub unsafe fn keepProbability(&self) -> c_float;

        /// The seed used to generate random numbers.
        #[unsafe(method(seed))]
        #[unsafe(method_family = none)]
        pub unsafe fn seed(&self) -> NSUInteger;

        /// The mask stride in the x, y, and x dimensions, which
        /// allows for the broadcasting the mask data.
        ///
        /// The only valid values are 0 and 1 for each dimension.
        /// For no broadcasting, set the values for each dimension
        /// to 1. For broadcasting, set desired values to 0.
        #[unsafe(method(maskStrideInPixels))]
        #[unsafe(method_family = none)]
        pub unsafe fn maskStrideInPixels(&self) -> MTLSize;

        #[unsafe(method(initWithDevice:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithDevice(
            this: Allocated<Self>,
            device: &ProtocolObject<dyn MTLDevice>,
        ) -> Retained<Self>;

        /// <NSSecureCoding
        /// > support
        ///
        /// # Safety
        ///
        /// `a_decoder` possibly has further requirements.
        #[unsafe(method(initWithCoder:device:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithCoder_device(
            this: Allocated<Self>,
            a_decoder: &NSCoder,
            device: &ProtocolObject<dyn MTLDevice>,
        ) -> Option<Retained<Self>>;

        /// Standard init with default properties per filter type.
        ///
        /// Parameter `device`: The device that the filter will be used on.
        ///
        /// Parameter `keepProbability`: The probability that each element in the input is kept.
        /// The valid range is (0.0f, 1.0f).
        ///
        /// Parameter `seed`: The seed used to generate random numbers.
        ///
        /// Parameter `maskStrideInPixels`: The mask stride in the x, y, and z dimensions, which
        /// allows for the broadcasting of mask data. The only valid
        /// values are 0 and 1 for each dimension. For no
        /// broadcasting, set the values for each dimension to 1.
        /// For broadcasting, set desired values to 0.
        ///
        /// Returns: A valid MPSCNNDropoutGradient object or nil, if failure.
        #[unsafe(method(initWithDevice:keepProbability:seed:maskStrideInPixels:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithDevice_keepProbability_seed_maskStrideInPixels(
            this: Allocated<Self>,
            device: &ProtocolObject<dyn MTLDevice>,
            keep_probability: c_float,
            seed: NSUInteger,
            mask_stride_in_pixels: MTLSize,
        ) -> Retained<Self>;
    );
}

/// Methods declared on superclass `MPSKernel`.
#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
impl MPSCNNDropoutGradient {
    extern_methods!(
        /// Called by NSCoder to decode MPSKernels
        ///
        /// This isn't the right interface to decode a MPSKernel, but
        /// it is the one that NSCoder uses. To enable your NSCoder
        /// (e.g. NSKeyedUnarchiver) to set which device to use
        /// extend the object to adopt the MPSDeviceProvider
        /// protocol. Otherwise, the Metal system default device
        /// will be used.
        ///
        /// # Safety
        ///
        /// `a_decoder` possibly has further requirements.
        #[unsafe(method(initWithCoder:))]
        #[unsafe(method_family = init)]
        pub unsafe fn initWithCoder(
            this: Allocated<Self>,
            a_decoder: &NSCoder,
        ) -> Option<Retained<Self>>;
    );
}

/// Methods declared on superclass `NSObject`.
#[cfg(all(feature = "MPSCNNKernel", feature = "MPSCore", feature = "MPSKernel"))]
impl MPSCNNDropoutGradient {
    extern_methods!(
        #[unsafe(method(init))]
        #[unsafe(method_family = init)]
        pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>;

        #[unsafe(method(new))]
        #[unsafe(method_family = new)]
        pub unsafe fn new() -> Retained<Self>;
    );
}