Chromium Code Reviews
chromiumcodereview-hr@appspot.gserviceaccount.com (chromiumcodereview-hr) | Please choose your nickname with Settings | Help | Chromium Project | Gerrit Changes | Sign out
(1114)

Issues Search
    My Issues | Starred     Open | Closed | All

Side by Side Diff: src/js/harmony-atomics.js

Issue 2732213005: Revert "This is a speculative chain of reverts to improve a Chrome" (Closed)
Patch Set: merge Created 3 years, 9 months ago
Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.
Jump to:
View unified diff | Download patch
« no previous file with comments | « src/heap/heap.cc ('k') | src/js/prologue.js » ('j') | no next file with comments »
Toggle Intra-line Diffs ('i') | Expand Comments ('e') | Collapse Comments ('c') | Show Comments Hide Comments ('s')
OLDNEW
(Empty)
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;
15 var MaxSimple;
16 var MinSimple;
17 var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
18
19 utils.Import(function(from) {
20 MaxSimple = from.MaxSimple;
21 MinSimple = from.MinSimple;
22 });
23
24 // -------------------------------------------------------------------
25
26
27 function CheckSharedIntegerTypedArray(ia) {
28 if (!%IsSharedIntegerTypedArray(ia)) {
29 throw %make_type_error(kNotIntegerSharedTypedArray, ia);
30 }
31 }
32
33 function CheckSharedInteger32TypedArray(ia) {
34 CheckSharedIntegerTypedArray(ia);
35 if (!%IsSharedInteger32TypedArray(ia)) {
36 throw %make_type_error(kNotInt32SharedTypedArray, ia);
37 }
38 }
39
40 // https://tc39.github.io/ecmascript_sharedmem/shmem.html#Atomics.ValidateAtomic Access
41 function ValidateIndex(index, length) {
42 var numberIndex = TO_NUMBER(index);
43 var accessIndex = TO_INTEGER(numberIndex);
44 if (numberIndex !== accessIndex) {
45 throw %make_range_error(kInvalidAtomicAccessIndex);
46 }
47 if (accessIndex < 0 || accessIndex >= length) {
48 throw %make_range_error(kInvalidAtomicAccessIndex);
49 }
50 return accessIndex;
51 }
52
53 //-------------------------------------------------------------------
54
55 function AtomicsCompareExchangeJS(sta, index, oldValue, newValue) {
56 CheckSharedIntegerTypedArray(sta);
57 index = ValidateIndex(index, %_TypedArrayGetLength(sta));
58 oldValue = TO_NUMBER(oldValue);
59 newValue = TO_NUMBER(newValue);
60 return %_AtomicsCompareExchange(sta, index, oldValue, newValue);
61 }
62
63 function AtomicsAddJS(ia, index, value) {
64 CheckSharedIntegerTypedArray(ia);
65 index = ValidateIndex(index, %_TypedArrayGetLength(ia));
66 value = TO_NUMBER(value);
67 return %_AtomicsAdd(ia, index, value);
68 }
69
70 function AtomicsSubJS(ia, index, value) {
71 CheckSharedIntegerTypedArray(ia);
72 index = ValidateIndex(index, %_TypedArrayGetLength(ia));
73 value = TO_NUMBER(value);
74 return %_AtomicsSub(ia, index, value);
75 }
76
77 function AtomicsAndJS(ia, index, value) {
78 CheckSharedIntegerTypedArray(ia);
79 index = ValidateIndex(index, %_TypedArrayGetLength(ia));
80 value = TO_NUMBER(value);
81 return %_AtomicsAnd(ia, index, value);
82 }
83
84 function AtomicsOrJS(ia, index, value) {
85 CheckSharedIntegerTypedArray(ia);
86 index = ValidateIndex(index, %_TypedArrayGetLength(ia));
87 value = TO_NUMBER(value);
88 return %_AtomicsOr(ia, index, value);
89 }
90
91 function AtomicsXorJS(ia, index, value) {
92 CheckSharedIntegerTypedArray(ia);
93 index = ValidateIndex(index, %_TypedArrayGetLength(ia));
94 value = TO_NUMBER(value);
95 return %_AtomicsXor(ia, index, value);
96 }
97
98 function AtomicsIsLockFreeJS(size) {
99 return %_AtomicsIsLockFree(TO_INTEGER(size));
100 }
101
102 function AtomicsWaitJS(ia, index, value, timeout) {
103 CheckSharedInteger32TypedArray(ia);
104 index = ValidateIndex(index, %_TypedArrayGetLength(ia));
105 if (IS_UNDEFINED(timeout)) {
106 timeout = INFINITY;
107 } else {
108 timeout = TO_NUMBER(timeout);
109 if (NUMBER_IS_NAN(timeout)) {
110 timeout = INFINITY;
111 } else {
112 timeout = MaxSimple(0, timeout);
113 }
114 }
115 return %AtomicsWait(ia, index, value, timeout);
116 }
117
118 function AtomicsWakeJS(ia, index, count) {
119 CheckSharedInteger32TypedArray(ia);
120 index = ValidateIndex(index, %_TypedArrayGetLength(ia));
121 if (IS_UNDEFINED(count)) {
122 count = kMaxUint32;
123 } else {
124 // Clamp to [0, kMaxUint32].
125 count = MinSimple(MaxSimple(0, TO_INTEGER(count)), kMaxUint32);
126 }
127 return %AtomicsWake(ia, index, count);
128 }
129
130 // -------------------------------------------------------------------
131
132 var Atomics = global.Atomics;
133
134 // The Atomics global is defined by the bootstrapper.
135
136 %AddNamedProperty(Atomics, toStringTagSymbol, "Atomics", READ_ONLY | DONT_ENUM);
137
138 utils.InstallFunctions(Atomics, DONT_ENUM, [
139 // TODO(binji): remove the rest of the (non futex) Atomics functions as they
140 // become builtins.
141 "compareExchange", AtomicsCompareExchangeJS,
142 "add", AtomicsAddJS,
143 "sub", AtomicsSubJS,
144 "and", AtomicsAndJS,
145 "or", AtomicsOrJS,
146 "xor", AtomicsXorJS,
147 "isLockFree", AtomicsIsLockFreeJS,
148 "wait", AtomicsWaitJS,
149 "wake", AtomicsWakeJS,
150 ]);
151
152 })
OLDNEW
« no previous file with comments | « src/heap/heap.cc ('k') | src/js/prologue.js » ('j') | no next file with comments »

Powered by Google App Engine
This is Rietveld 408576698