blob: 96f538e4f3755daeab59aade30185f32d9c8b14d (
plain)
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
|
// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/runtime/runtime-utils.h"
#include "src/arguments.h"
#include "src/base/platform/time.h"
#include "src/conversions-inl.h"
#include "src/futex-emulation.h"
#include "src/globals.h"
// Implement Futex API for SharedArrayBuffers as defined in the
// SharedArrayBuffer draft spec, found here:
// https://github.com/tc39/ecmascript_sharedmem
namespace v8 {
namespace internal {
RUNTIME_FUNCTION(Runtime_AtomicsNumWaitersForTesting) {
HandleScope scope(isolate);
DCHECK_EQ(2, args.length());
CONVERT_ARG_HANDLE_CHECKED(JSTypedArray, sta, 0);
CONVERT_SIZE_ARG_CHECKED(index, 1);
CHECK(sta->GetBuffer()->is_shared());
CHECK_LT(index, NumberToSize(sta->length()));
CHECK_EQ(sta->type(), kExternalInt32Array);
Handle<JSArrayBuffer> array_buffer = sta->GetBuffer();
size_t addr = (index << 2) + NumberToSize(sta->byte_offset());
return FutexEmulation::NumWaitersForTesting(isolate, array_buffer, addr);
}
RUNTIME_FUNCTION(Runtime_SetAllowAtomicsWait) {
HandleScope scope(isolate);
DCHECK_EQ(1, args.length());
CONVERT_BOOLEAN_ARG_CHECKED(set, 0);
isolate->set_allow_atomics_wait(set);
return ReadOnlyRoots(isolate).undefined_value();
}
} // namespace internal
} // namespace v8
|
