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GeezerVison is showing github.com — arrayfire-rust/src/core/random.rs at master · arrayfire/arrayfire-rust Expand file tree/ Copy pathrandom.rsMore file actions 368 lines (325 loc) · 11.2 KB / Copy pathrandom.rsFile metadata and controls368 lines (325 loc) · 11.2 KB 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 use super::array::Array; use super::defines::{AfError, RandomEngineType}; use super::dim4::Dim4; use super::error::HANDLE_ERROR; use super::util::{af_array, af_random_engine, dim_t, u64_t, FloatingPoint, HasAfEnum}; use libc::{c_int, c_uint}; extern "C" { fn af_set_seed(seed: u64_t) -> c_int; fn af_get_seed(seed: *mut u64_t) -> c_int; fn af_randu(out: *mut af_array, ndims: c_uint, dims: *const dim_t, afdtype: c_uint) -> c_int; fn af_randn(out: *mut af_array, ndims: c_uint, dims: *const dim_t, afdtype: c_uint) -> c_int; fn af_create_random_engine(engine: *mut af_random_engine, rtype: c_uint, seed: u64_t) -> c_int; fn af_retain_random_engine( engine: *mut af_random_engine, inputEngine: af_random_engine, ) -> c_int; fn af_random_engine_set_type(engine: *mut af_random_engine, rtpye: c_uint) -> c_int; fn af_random_engine_get_type(rtype: *mut c_uint, engine: af_random_engine) -> c_int; fn af_random_engine_set_seed(engine: *mut af_random_engine, seed: u64_t) -> c_int; fn af_random_engine_get_seed(seed: *mut u64_t, engine: af_random_engine) -> c_int; fn af_release_random_engine(engine: af_random_engine) -> c_int; fn af_get_default_random_engine(engine: *mut af_random_engine) -> c_int; fn af_set_default_random_engine_type(rtype: c_uint) -> c_int; fn af_random_uniform( out: *mut af_array, ndims: c_uint, dims: *const dim_t, aftype: c_uint, engine: af_random_engine, ) -> c_int; fn af_random_normal( out: *mut af_array, ndims: c_uint, dims: *const dim_t, aftype: c_uint, engine: af_random_engine, ) -> c_int; } /// Set seed for random number generation pub fn set_seed(seed: u64) { let err_val = unsafe { af_set_seed(seed as u64_t) }; HANDLE_ERROR(AfError::from(err_val)); } /// Get the seed of random number generator pub fn get_seed() -> u64 { let mut ret_val: u64 = 0; let err_val = unsafe { af_get_seed(&mut ret_val as *mut u64_t) }; HANDLE_ERROR(AfError::from(err_val)); ret_val } macro_rules! data_gen_def { [$doc_str: expr, $fn_name:ident, $ffi_name: ident, $($type_trait: ident),+] => ( #[doc=$doc_str] /// ///# Parameters /// /// - `dims` is the output dimensions /// ///# Return Values /// /// An Array with random values. pub fn $fn_name<T>(dims: Dim4) -> Array<T> where $( T: $type_trait, )* { let aftype = T::get_af_dtype(); unsafe { let mut temp: af_array = std::ptr::null_mut(); let err_val = $ffi_name(&mut temp as *mut af_array, dims.ndims() as c_uint, dims.get().as_ptr() as *const dim_t, aftype as c_uint); HANDLE_ERROR(AfError::from(err_val)); temp.into() } } ) } data_gen_def!( "Create random numbers from uniform distribution", randu, af_randu, HasAfEnum ); data_gen_def!( "Create random numbers from normal distribution", randn, af_randn, HasAfEnum, FloatingPoint ); /// Random number generator engine /// /// This is a wrapper for ArrayFire's native random number generator engine. /// /// ## Sharing Across Threads /// /// While sharing this object with other threads, there is no need to wrap /// this in an Arc object unless only one such object is required to exist. /// The reason being that ArrayFire's internal details that are pointed to /// by the RandoMEngine handle are appropriately reference counted in thread safe /// manner. However, if you need to modify RandomEngine object, then please do wrap /// the object using a Mutex or Read-Write lock. pub struct RandomEngine { handle: af_random_engine, } unsafe impl Send for RandomEngine {} /// Used for creating RandomEngine object from native resource id impl From<af_random_engine> for RandomEngine { fn from(t: af_random_engine) -> Self { Self { handle: t } } } impl RandomEngine { /// Create a new random engine object /// /// # Parameters /// /// - `rengine` can be value of [RandomEngineType](./enum.RandomEngineType.html) enum. /// - `seed` is the initial seed value /// /// # Return Values /// /// A object of type RandomEngine pub fn new(rengine: RandomEngineType, seed: Option<u64>) -> Self { let mut temp: af_random_engine = std::ptr::null_mut(); let err_val = unsafe { af_create_random_engine( &mut temp as *mut af_random_engine, rengine as c_uint, seed.unwrap_or(0u64), ) }; HANDLE_ERROR(AfError::from(err_val)); RandomEngine { handle: temp } } /// Get random engine type pub fn get_type(&self) -> RandomEngineType { let mut temp: u32 = 0; let err_val = unsafe { af_random_engine_get_type(&mut temp as *mut c_uint, self.handle) }; HANDLE_ERROR(AfError::from(err_val)); RandomEngineType::from(temp) } /// Get random engine type pub fn set_type(&mut self, engine_type: RandomEngineType) { let err_val = unsafe { af_random_engine_set_type( &mut self.handle as *mut af_random_engine, engine_type as c_uint, ) }; HANDLE_ERROR(AfError::from(err_val)); } /// Set seed for random engine pub fn set_seed(&mut self, seed: u64) { let err_val = unsafe { af_random_engine_set_seed(&mut self.handle as *mut af_random_engine, seed as u64_t) }; HANDLE_ERROR(AfError::from(err_val)); } /// Get seed of the random engine pub fn get_seed(&self) -> u64 { let mut seed: u64 = 0; let err_val = unsafe { af_random_engine_get_seed(&mut seed as *mut u64_t, self.handle) }; HANDLE_ERROR(AfError::from(err_val)); seed } /// Returns the native FFI handle for Rust object `RandomEngine` unsafe fn get(&self) -> af_random_engine { self.handle } } /// Increment reference count of RandomEngine's native resource impl Clone for RandomEngine { fn clone(&self) -> Self { let mut temp: af_random_engine = std::ptr::null_mut(); let err_val = unsafe { af_retain_random_engine(&mut temp as *mut af_random_engine, self.handle) }; HANDLE_ERROR(AfError::from(err_val)); RandomEngine::from(temp) } } /// Free RandomEngine's native resource impl Drop for RandomEngine { fn drop(&mut self) { let err_val = unsafe { af_release_random_engine(self.handle) }; HANDLE_ERROR(AfError::from(err_val)); } } #[cfg(feature = "afserde")] mod afserde { // Reimport required from super scope use super::{RandomEngine, RandomEngineType}; use serde::de::Deserializer; use serde::ser::Serializer; use serde::{Deserialize, Serialize}; #[derive(Debug, Serialize, Deserialize)] struct RandEngine { engine_type: RandomEngineType, seed: u64, } /// Serialize Implementation of Array impl Serialize for RandomEngine { fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error> where S: Serializer, { let r = RandEngine { engine_type: self.get_type(), seed: self.get_seed(), }; r.serialize(serializer) } } /// Deserialize Implementation of Array #[cfg(feature = "afserde")] impl<'de> Deserialize<'de> for RandomEngine { fn deserialize<D>(deserializer: D) -> Result<Self, D::Error> where D: Deserializer<'de>, { match RandEngine::deserialize(deserializer) { Ok(r) => Ok(RandomEngine::new(r.engine_type, Some(r.seed))), Err(err) => Err(err), } } } } /// Get default random engine pub fn get_default_random_engine() -> RandomEngine { let mut temp: af_random_engine = std::ptr::null_mut(); let mut err_val = unsafe { af_get_default_random_engine(&mut temp as *mut af_random_engine) }; HANDLE_ERROR(AfError::from(err_val)); let mut handle: af_random_engine = std::ptr::null_mut(); err_val = unsafe { af_retain_random_engine(&mut handle as *mut af_random_engine, temp) }; HANDLE_ERROR(AfError::from(err_val)); RandomEngine { handle } } /// Set the random engine type for default random number generator /// /// # Parameters /// /// - `rtype` can take one of the values of enum [RandomEngineType](./enum.RandomEngineType.html) pub fn set_default_random_engine_type(rtype: RandomEngineType) { let err_val = unsafe { af_set_default_random_engine_type(rtype as c_uint) }; HANDLE_ERROR(AfError::from(err_val)); } /// Generate array of uniform numbers using a random engine /// /// # Parameters /// /// - `dims` is output array dimensions /// - `engine` is an object of type [RandomEngine](./struct.RandomEngine.html) /// /// # Return Values /// /// An Array with uniform numbers generated using random engine pub fn random_uniform<T>(dims: Dim4, engine: &RandomEngine) -> Array<T> where T: HasAfEnum, { let aftype = T::get_af_dtype(); let mut temp: af_array = std::ptr::null_mut(); let err_val = unsafe { af_random_uniform( &mut temp as *mut af_array, dims.ndims() as c_uint, dims.get().as_ptr() as *const dim_t, aftype as c_uint, engine.get(), ) }; HANDLE_ERROR(AfError::from(err_val)); temp.into() } /// Generate array of normal numbers using a random engine /// /// # Parameters /// /// - `dims` is output array dimensions /// - `engine` is an object of type [RandomEngine](./struct.RandomEngine.html) /// /// # Return Values /// /// An Array with normal numbers generated using random engine pub fn random_normal<T>(dims: Dim4, engine: &RandomEngine) -> Array<T> where T: HasAfEnum + FloatingPoint, { let aftype = T::get_af_dtype(); let mut temp: af_array = std::ptr::null_mut(); let err_val = unsafe { af_random_normal( &mut temp as *mut af_array, dims.ndims() as c_uint, dims.get().as_ptr() as *const dim_t, aftype as c_uint, engine.get(), ) }; HANDLE_ERROR(AfError::from(err_val)); temp.into() } #[cfg(test)] mod tests { #[cfg(feature = "afserde")] mod serde_tests { use super::super::RandomEngine; use crate::core::defines::RandomEngineType; #[test] #[cfg(feature = "afserde")] fn random_engine_serde_bincode() { // ANCHOR: rng_bincode_serde_snippet use RandomEngineType::THREEFRY_2X32_16; let input = RandomEngine::new(THREEFRY_2X32_16, Some(2047)); let encoded = match bincode::serialize(&input) { Ok(encoded) => encoded, Err(_) => vec![], }; // Save to disk or anything else required // Load different object if required let decoded: RandomEngine = bincode::deserialize(&encoded).unwrap(); // ANCHOR_END: rng_bincode_serde_snippet assert_eq!(input.get_seed(), decoded.get_seed()); assert_eq!(input.get_type(), decoded.get_type()); } } } |
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