Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 156x 156x 156x 2x 2x 2x 2x 2x 2x 2x 2x 168x 168x 168x 2x 2x 2x 2x 2x 2x 2x 2x 144x 144x 144x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 123x 123x 123x 123x 123x 123x 123x 123x 22x 22x 20x 20x 22x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 54x 54x 103x 103x 103x 103x 103x 103x 103x 103x 103x 224x 224x 224x 224x 224x 224x 224x 224x 69x 69x 155x 224x 12x 12x 143x 143x 143x 143x 143x 143x 224x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 280x 280x 56x 56x 224x 280x 12x 12x 212x 280x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 492x 492x 492x 492x 492x 492x 492x 492x 492x 492x 492x 492x 456x 456x 492x 36x 36x 492x 492x 120x 120x 492x 56x 56x 316x 492x 162x 162x 154x 492x 118x 118x 118x 118x 118x 118x 16x 16x 16x 118x 118x 6x 6x 118x 24x 24x 24x 88x 88x 88x 118x 132x 132x 88x 88x 36x 492x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 60x 60x 60x 60x 60x 60x 60x 2x 60x 28x 58x 30x 30x 60x 56x 56x 4x 56x 4x 52x 4x 48x 44x 44x 56x 320x 320x 56x 60x 60x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 103x 346x 346x 346x 346x 300x 346x 20x 20x 346x 216x 216x 216x 216x 216x 216x 216x 216x 94x 4x 4x 94x 212x 212x 212x 322x 346x 103x 103x 103x 103x 103x 103x 103x 276x 276x 14810x 14810x 276x 276x 123x 2x 2x 2x 2x 2x | /**
* @license Apache-2.0
*
* Copyright (c) 2024 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive;
var isCollection = require( '@stdlib/assert/is-collection' );
var isTypedArrayLike = require( '@stdlib/assert/is-typed-array-like' );
var isArrayBuffer = require( '@stdlib/assert/is-arraybuffer' );
var isComplexDataType = require( '@stdlib/array/base/assert/is-complex-floating-point-data-type' );
var isComplex64Array = require( '@stdlib/assert/is-complex64array' );
var isComplex128Array = require( '@stdlib/assert/is-complex128array' );
var isBooleanArray = require( '@stdlib/assert/is-booleanarray' );
var setReadOnly = require( '@stdlib/utils/define-nonenumerable-read-only-property' );
var setReadOnlyAccessor = require( '@stdlib/utils/define-nonenumerable-read-only-accessor' );
var ctors = require( '@stdlib/array/typed-ctors' );
var reinterpret64 = require( '@stdlib/strided/base/reinterpret-complex64' );
var reinterpret128 = require( '@stdlib/strided/base/reinterpret-complex128' );
var reinterpretBoolean = require( '@stdlib/strided/base/reinterpret-boolean' );
var resolveGetter = require( '@stdlib/array/base/resolve-getter' );
var resolveSetter = require( '@stdlib/array/base/resolve-setter' );
var ARRAY_DEFAULTS = require( '@stdlib/array/defaults' );
var format = require( '@stdlib/string/format' );
var ArrayBuffer = require( '@stdlib/array/buffer' );
var ceil = require( '@stdlib/math/base/special/ceil' );
var floor = require( '@stdlib/math/base/special/floor' );
var ceil2 = require( '@stdlib/math/base/special/ceil2' );
var log2 = require( '@stdlib/math/base/special/log2' );
var min = require( '@stdlib/math/base/special/min' );
var defaults = require( './defaults.js' );
var validate = require( './validate.js' );
var createPool = require( './pool.js' );
var BYTES_PER_ELEMENT = require( './bytes_per_element.json' );
// VARIABLES //
var DEFAULT_DTYPE = ARRAY_DEFAULTS.get( 'dtypes.default' );
var Complex64Array = ctors( 'complex64' );
var Complex128Array = ctors( 'complex128' );
var BooleanArray = ctors( 'bool' );
// FUNCTIONS //
/**
* Tests whether an array is a single-precision complex floating-point number array.
*
* @private
* @param {Collection} arr - input array
* @returns {boolean} boolean indicating whether an input array is a single-precision complex floating-point number array
*/
function isCmplx64Array( arr ) {
return ( arr instanceof Complex64Array );
}
/**
* Tests whether an array is a double-precision complex floating-point number array.
*
* @private
* @param {Collection} arr - input array
* @returns {boolean} boolean indicating whether an input array is a double-precision complex floating-point number array
*/
function isCmplx128Array( arr ) {
return ( arr instanceof Complex128Array );
}
/**
* Tests whether an array is a boolean array.
*
* @private
* @param {Collection} arr - input array
* @returns {boolean} boolean indicating whether an input array is a boolean array
*/
function isBoolArray( arr ) {
return ( arr instanceof BooleanArray );
}
// MAIN //
/**
* Creates a typed array pool.
*
* @param {Options} [options] - pool options
* @param {NonNegativeInteger} [options.highWaterMark] - maximum total memory which can be allocated
* @throws {TypeError} options argument must be an object
* @throws {TypeError} must provide valid options
* @returns {Function} allocator
*
* @example
* var typedarraypool = factory();
*
* // Allocate an array of doubles:
* var arr = typedarraypool( 5, 'float64' );
* // returns <Float64Array>[ 0.0, 0.0, 0.0, 0.0, 0.0 ]
*
* arr[ 0 ] = 3.14;
* arr[ 1 ] = 3.14;
*
* // ...
*
* // Free the allocated memory to be used in a future allocation:
* typedarraypool.free( arr );
*/
function factory( options ) {
var nbytes;
var pool;
var opts;
var err;
opts = defaults();
if ( arguments.length ) {
err = validate( opts, options );
if ( err ) {
throw err;
}
}
pool = createPool( ceil( log2( opts.highWaterMark ) ) );
nbytes = 0;
setReadOnly( malloc, 'malloc', malloc ); // circular reference
setReadOnly( malloc, 'calloc', calloc );
setReadOnly( malloc, 'free', free );
setReadOnly( malloc, 'clear', clear );
setReadOnly( malloc, 'highWaterMark', opts.highWaterMark );
setReadOnlyAccessor( malloc, 'nbytes', getBytes );
return malloc;
/**
* Returns the number of allocated bytes.
*
* @private
* @returns {NonNegativeInteger} number of allocated bytes
*/
function getBytes() {
return nbytes;
}
/**
* Returns an array buffer.
*
* @private
* @param {NonNegativeInteger} n - number of bytes
* @returns {(ArrayBuffer|null)} array buffer or null
*/
function arraybuffer( n ) {
var buf;
var i;
// Convert the number of bytes to an index in our pool table:
i = log2( n );
// If we already have an available array buffer, use it...
if ( i < pool.length && pool[ i ].length ) {
return pool[ i ].pop();
}
// Before allocating a new array buffer, ensure that we have not exceeded the maximum number of bytes we are allowed to allocate...
if ( nbytes+n > opts.highWaterMark ) {
return null;
}
buf = new ArrayBuffer( n );
// Update the running counter of allocated bytes:
nbytes += n;
return buf;
}
/**
* Returns a typed array.
*
* @private
* @param {Function} ctor - typed array constructor
* @param {NonNegativeInteger} len - view length
* @param {string} dtype - data type
* @returns {(TypedArray|null)} typed array or null
*/
function typedarray( ctor, len, dtype ) {
var buf;
if ( len === 0 ) {
return new ctor( 0 );
}
buf = arraybuffer( ceil2( len )*BYTES_PER_ELEMENT[ dtype ] );
if ( buf === null ) {
return buf;
}
return new ctor( buf, 0, len );
}
/**
* Returns an uninitialized typed array.
*
* ## Notes
*
* - Memory is **not** initialized.
* - Memory is lazily allocated.
* - If the function returns `null`, the function was unable to allocate a new typed array from the typed array pool (most likely due to insufficient memory).
*
* @private
* @param {(NonNegativeInteger|Collection)} [arg] - an array length or an array-like object
* @param {string} [dtype="float64"] - data type
* @throws {TypeError} must provide a valid array length or an array-like object
* @throws {TypeError} must provide a recognized data type
* @returns {(TypedArray|null)} typed array or null
*/
function malloc() {
var nargs;
var dtype;
var ctor;
var arr;
var out;
var set;
var get;
var len;
var i;
nargs = arguments.length;
if ( nargs && isString( arguments[ nargs-1 ] ) ) {
nargs -= 1;
dtype = arguments[ nargs ];
} else {
dtype = DEFAULT_DTYPE;
}
ctor = ctors( dtype );
if ( ctor === null ) {
throw new TypeError( format( 'invalid argument. Must provide a recognized data type. Value: `%s`.', dtype ) );
}
if ( nargs <= 0 ) {
return new ctor( 0 );
}
// Check if provided a typed array length...
if ( isNonNegativeInteger( arguments[ 0 ] ) ) {
return typedarray( ctor, arguments[ 0 ], dtype );
}
// Check if provided an array-like object containing data elements...
if ( isCollection( arguments[ 0 ] ) ) {
arr = arguments[ 0 ];
len = arr.length;
if ( isComplex128Array( arr ) ) {
arr = reinterpret128( arr, 0 );
} else if ( isComplex64Array( arr ) ) {
arr = reinterpret64( arr, 0 );
} else if ( isBooleanArray( arr ) ) {
arr = reinterpretBoolean( arr, 0 );
} else if ( isComplexDataType( dtype ) ) {
// Assume we've been provided an array of interleaved real and imaginary components...
len /= 2;
}
out = typedarray( ctor, len, dtype );
if ( out === null ) {
return out;
}
if ( isCmplx128Array( out ) || isCmplx64Array( out ) || isBoolArray( out ) ) {
out.set( arr );
return out;
}
// Resolve element accessors in order to account for the possibility that `arr` is a complex number array. As we don't prohibit other "unsafe" casts (e.g., providing a `Float64Array` and specifying a `dtype` of `uint8`), we don't prohibit providing a complex number array and specifying a real `dtype`. The results will probably be unexpected/gibberish, but I am not sure we should be overly pedantic in ensuring users don't do ill-advised things...
get = resolveGetter( arr );
set = resolveSetter( out );
for ( i = 0; i < len; i++ ) {
set( out, i, get( arr, i ) );
}
return out;
}
throw new TypeError( format( 'invalid argument. First argument must be either an array length or an array-like object. Value: `%s`.', arguments[ 0 ] ) );
}
/**
* Returns a zero-initialized typed array.
*
* ## Notes
*
* - If the function returns `null`, the function was unable to allocate a new typed array from the typed array pool (most likely due to insufficient memory).
*
* @private
* @param {NonNegativeInteger} [len=0] - array length
* @param {string} [dtype="float64"] - data type
* @throws {TypeError} must provide a valid array length
* @throws {TypeError} must provide a recognized data type
* @returns {(TypedArray|null)} typed array or null
*/
function calloc() {
var nargs;
var out;
var tmp;
var i;
nargs = arguments.length;
if ( nargs === 0 ) {
out = malloc();
} else if ( nargs === 1 ) {
out = malloc( arguments[ 0 ] );
} else {
out = malloc( arguments[ 0 ], arguments[ 1 ] );
}
if ( out !== null ) {
// Initialize the memory...
if ( isCmplx128Array( out ) ) {
tmp = reinterpret128( out, 0 );
} else if ( isCmplx64Array( out ) ) {
tmp = reinterpret64( out, 0 );
} else if ( isBoolArray( out ) ) {
tmp = reinterpretBoolean( out, 0 );
} else {
tmp = out;
}
for ( i = 0; i < tmp.length; i++ ) {
tmp[ i ] = 0.0;
}
}
return out;
}
/**
* Frees a typed array or typed array buffer.
*
* ## Notes
*
* - Implicitly, we support providing non-internally allocated arrays and array buffer (e.g., "freeing" a typed array allocated in userland); however, the freed array buffer is likely to have excess capacity when compared to other members in its pool.
*
* @private
* @param {(TypedArray|ArrayBuffer)} buf - typed array or array buffer to free
* @throws {TypeError} must provide a typed array or typed array buffer
* @returns {boolean} boolean indicating whether the typed array or array buffer was successfully freed
*/
function free( buf ) {
var n;
var p;
var i;
if ( isTypedArrayLike( buf ) && buf.buffer ) {
buf = buf.buffer;
} else if ( !isArrayBuffer( buf ) ) {
throw new TypeError( format( 'invalid argument. Must provide a typed array or ArrayBuffer. Value: `%s`.', buf ) );
}
if ( buf.byteLength > 0 ) {
n = floor( log2( buf.byteLength ) );
// Prohibit "freeing" array buffers which would potentially allow users to circumvent high water mark limits:
n = min( pool.length-1, n );
// Ensure that we do not attempt to free the same buffer more than once...
p = pool[ n ];
for ( i = 0; i < p.length; i++ ) {
if ( p[ i ] === buf ) {
return false;
}
}
// Add the buffer to our pool of free buffers:
p.push( buf );
}
return true;
}
/**
* Clears the typed array pool allowing garbage collection of previously allocated (and currently free) array buffers.
*
* @private
*/
function clear() {
var i;
for ( i = 0; i < pool.length; i++ ) {
pool[ i ].length = 0;
}
nbytes = 0;
}
}
// EXPORTS //
module.exports = factory;
|