Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | (function(global, utils) { |
| 6 | |
| 7 | "use strict"; |
| 8 | |
| 9 | %CheckIsBootstrapping(); |
| 10 | |
| 11 | // ------------------------------------------------------------------- |
| 12 | // Imports |
| 13 | |
| 14 | var GlobalObject = global.Object; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 15 | var MakeRangeError; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 16 | var MakeTypeError; |
| 17 | var MaxSimple; |
| 18 | var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); |
| 19 | |
| 20 | utils.Import(function(from) { |
| 21 | MakeTypeError = from.MakeTypeError; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 22 | MakeRangeError = from.MakeRangeError; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 23 | MaxSimple = from.MaxSimple; |
| 24 | }); |
| 25 | |
| 26 | // ------------------------------------------------------------------- |
| 27 | |
| 28 | |
| 29 | function CheckSharedIntegerTypedArray(ia) { |
| 30 | if (!%IsSharedIntegerTypedArray(ia)) { |
| 31 | throw MakeTypeError(kNotIntegerSharedTypedArray, ia); |
| 32 | } |
| 33 | } |
| 34 | |
| 35 | function CheckSharedInteger32TypedArray(ia) { |
| 36 | CheckSharedIntegerTypedArray(ia); |
| 37 | if (!%IsSharedInteger32TypedArray(ia)) { |
| 38 | throw MakeTypeError(kNotInt32SharedTypedArray, ia); |
| 39 | } |
| 40 | } |
| 41 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 42 | // https://tc39.github.io/ecmascript_sharedmem/shmem.html#Atomics.ValidateAtomicAccess |
| 43 | function ValidateIndex(index, length) { |
| 44 | var numberIndex = TO_NUMBER(index); |
| 45 | var accessIndex = TO_INTEGER(numberIndex); |
| 46 | if (numberIndex !== accessIndex) { |
| 47 | throw MakeRangeError(kInvalidAtomicAccessIndex); |
| 48 | } |
| 49 | if (accessIndex < 0 || accessIndex >= length) { |
| 50 | throw MakeRangeError(kInvalidAtomicAccessIndex); |
| 51 | } |
| 52 | return accessIndex; |
| 53 | } |
| 54 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 55 | //------------------------------------------------------------------- |
| 56 | |
| 57 | function AtomicsCompareExchangeJS(sta, index, oldValue, newValue) { |
| 58 | CheckSharedIntegerTypedArray(sta); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 59 | index = ValidateIndex(index, %_TypedArrayGetLength(sta)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 60 | oldValue = TO_NUMBER(oldValue); |
| 61 | newValue = TO_NUMBER(newValue); |
| 62 | return %_AtomicsCompareExchange(sta, index, oldValue, newValue); |
| 63 | } |
| 64 | |
| 65 | function AtomicsLoadJS(sta, index) { |
| 66 | CheckSharedIntegerTypedArray(sta); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 67 | index = ValidateIndex(index, %_TypedArrayGetLength(sta)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 68 | return %_AtomicsLoad(sta, index); |
| 69 | } |
| 70 | |
| 71 | function AtomicsStoreJS(sta, index, value) { |
| 72 | CheckSharedIntegerTypedArray(sta); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 73 | index = ValidateIndex(index, %_TypedArrayGetLength(sta)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 74 | value = TO_NUMBER(value); |
| 75 | return %_AtomicsStore(sta, index, value); |
| 76 | } |
| 77 | |
| 78 | function AtomicsAddJS(ia, index, value) { |
| 79 | CheckSharedIntegerTypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 80 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 81 | value = TO_NUMBER(value); |
| 82 | return %_AtomicsAdd(ia, index, value); |
| 83 | } |
| 84 | |
| 85 | function AtomicsSubJS(ia, index, value) { |
| 86 | CheckSharedIntegerTypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 87 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 88 | value = TO_NUMBER(value); |
| 89 | return %_AtomicsSub(ia, index, value); |
| 90 | } |
| 91 | |
| 92 | function AtomicsAndJS(ia, index, value) { |
| 93 | CheckSharedIntegerTypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 94 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 95 | value = TO_NUMBER(value); |
| 96 | return %_AtomicsAnd(ia, index, value); |
| 97 | } |
| 98 | |
| 99 | function AtomicsOrJS(ia, index, value) { |
| 100 | CheckSharedIntegerTypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 101 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 102 | value = TO_NUMBER(value); |
| 103 | return %_AtomicsOr(ia, index, value); |
| 104 | } |
| 105 | |
| 106 | function AtomicsXorJS(ia, index, value) { |
| 107 | CheckSharedIntegerTypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 108 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 109 | value = TO_NUMBER(value); |
| 110 | return %_AtomicsXor(ia, index, value); |
| 111 | } |
| 112 | |
| 113 | function AtomicsExchangeJS(ia, index, value) { |
| 114 | CheckSharedIntegerTypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 115 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 116 | value = TO_NUMBER(value); |
| 117 | return %_AtomicsExchange(ia, index, value); |
| 118 | } |
| 119 | |
| 120 | function AtomicsIsLockFreeJS(size) { |
| 121 | return %_AtomicsIsLockFree(size); |
| 122 | } |
| 123 | |
| 124 | // Futexes |
| 125 | |
| 126 | function AtomicsFutexWaitJS(ia, index, value, timeout) { |
| 127 | CheckSharedInteger32TypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 128 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 129 | if (IS_UNDEFINED(timeout)) { |
| 130 | timeout = INFINITY; |
| 131 | } else { |
| 132 | timeout = TO_NUMBER(timeout); |
| 133 | if (NUMBER_IS_NAN(timeout)) { |
| 134 | timeout = INFINITY; |
| 135 | } else { |
| 136 | timeout = MaxSimple(0, timeout); |
| 137 | } |
| 138 | } |
| 139 | return %AtomicsFutexWait(ia, index, value, timeout); |
| 140 | } |
| 141 | |
| 142 | function AtomicsFutexWakeJS(ia, index, count) { |
| 143 | CheckSharedInteger32TypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 144 | index = ValidateIndex(index, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 145 | count = MaxSimple(0, TO_INTEGER(count)); |
| 146 | return %AtomicsFutexWake(ia, index, count); |
| 147 | } |
| 148 | |
| 149 | function AtomicsFutexWakeOrRequeueJS(ia, index1, count, value, index2) { |
| 150 | CheckSharedInteger32TypedArray(ia); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 151 | index1 = ValidateIndex(index1, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 152 | count = MaxSimple(0, TO_INTEGER(count)); |
| 153 | value = TO_INT32(value); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame^] | 154 | index2 = ValidateIndex(index2, %_TypedArrayGetLength(ia)); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 155 | if (index1 < 0 || index1 >= %_TypedArrayGetLength(ia) || |
| 156 | index2 < 0 || index2 >= %_TypedArrayGetLength(ia)) { |
| 157 | return UNDEFINED; |
| 158 | } |
| 159 | return %AtomicsFutexWakeOrRequeue(ia, index1, count, value, index2); |
| 160 | } |
| 161 | |
| 162 | // ------------------------------------------------------------------- |
| 163 | |
| 164 | function AtomicsConstructor() {} |
| 165 | |
| 166 | var Atomics = new AtomicsConstructor(); |
| 167 | |
| 168 | %InternalSetPrototype(Atomics, GlobalObject.prototype); |
| 169 | %AddNamedProperty(global, "Atomics", Atomics, DONT_ENUM); |
| 170 | %FunctionSetInstanceClassName(AtomicsConstructor, 'Atomics'); |
| 171 | |
| 172 | %AddNamedProperty(Atomics, toStringTagSymbol, "Atomics", READ_ONLY | DONT_ENUM); |
| 173 | |
| 174 | // These must match the values in src/futex-emulation.h |
| 175 | utils.InstallConstants(Atomics, [ |
| 176 | "OK", 0, |
| 177 | "NOTEQUAL", -1, |
| 178 | "TIMEDOUT", -2, |
| 179 | ]); |
| 180 | |
| 181 | utils.InstallFunctions(Atomics, DONT_ENUM, [ |
| 182 | "compareExchange", AtomicsCompareExchangeJS, |
| 183 | "load", AtomicsLoadJS, |
| 184 | "store", AtomicsStoreJS, |
| 185 | "add", AtomicsAddJS, |
| 186 | "sub", AtomicsSubJS, |
| 187 | "and", AtomicsAndJS, |
| 188 | "or", AtomicsOrJS, |
| 189 | "xor", AtomicsXorJS, |
| 190 | "exchange", AtomicsExchangeJS, |
| 191 | "isLockFree", AtomicsIsLockFreeJS, |
| 192 | "futexWait", AtomicsFutexWaitJS, |
| 193 | "futexWake", AtomicsFutexWakeJS, |
| 194 | "futexWakeOrRequeue", AtomicsFutexWakeOrRequeueJS, |
| 195 | ]); |
| 196 | |
| 197 | }) |