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ClearScript/ClearScript/V8/V8ScriptEngine.NetStandard.cs at master · slamj1/ClearScript · GitHub
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V8ScriptEngine.NetStandard.cs
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V8ScriptEngine.NetStandard.cs
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using
System
;
using
System
.
Reflection
;
using
System
.
Threading
.
Tasks
;
using
Microsoft
.
ClearScript
.
JavaScript
;
using
Microsoft
.
ClearScript
.
Util
;
namespace
Microsoft
.
ClearScript
.
V8
{
public
sealed
partial
class
V8ScriptEngine
{
#region internal members
private
void
CompletePromise
<
T
>
(
ValueTask
<
T
>
valueTask
,
object
resolve
,
object
reject
)
{
Func
<
T
>
getResult
=
(
)
=>
valueTask
.
Result
;
Script
.
EngineInternal
.
completePromiseWithResult
(
getResult
,
resolve
,
reject
)
;
}
private
void
CompletePromise
(
ValueTask
valueTask
,
object
resolve
,
object
reject
)
{
Action
wait
=
(
)
=>
WaitForValueTask
(
valueTask
)
;
Script
.
EngineInternal
.
completePromise
(
wait
,
resolve
,
reject
)
;
}
private
static
void
WaitForValueTask
(
ValueTask
valueTask
)
{
if
(
valueTask
.
IsCompletedSuccessfully
)
{
return
;
}
if
(
valueTask
.
IsCanceled
)
{
throw
new
TaskCanceledException
(
)
;
}
valueTask
.
AsTask
(
)
.
Wait
(
)
;
}
partial
void
TryConvertValueTaskToPromise
(
object
obj
,
Action
<
object
>
setResult
)
{
if
(
obj
.
GetType
(
)
.
IsAssignableToGenericType
(
typeof
(
ValueTask
<
>
)
,
out
var
typeArgs
)
)
{
setResult
(
typeof
(
ValueTaskConverter
<
>
)
.
MakeSpecificType
(
typeArgs
)
.
InvokeMember
(
"ToPromise"
,
BindingFlags
.
InvokeMethod
|
BindingFlags
.
Public
|
BindingFlags
.
Static
,
null
,
null
,
new
[
]
{
obj
,
this
}
)
)
;
}
else
if
(
obj
is
ValueTask
valueTask
)
{
setResult
(
valueTask
.
ToPromise
(
this
)
)
;
}
}
#endregion
#region IJavaScriptEngine implementation
object
IJavaScriptEngine
.
CreatePromiseForValueTask
<
T
>
(
ValueTask
<
T
>
valueTask
)
{
if
(
valueTask
.
IsCompleted
)
{
return
CreatePromise
(
(
resolve
,
reject
)
=>
CompletePromise
(
valueTask
,
resolve
,
reject
)
)
;
}
return
(
(
IJavaScriptEngine
)
this
)
.
CreatePromiseForTask
(
valueTask
.
AsTask
(
)
)
;
}
object
IJavaScriptEngine
.
CreatePromiseForValueTask
(
ValueTask
valueTask
)
{
if
(
valueTask
.
IsCompleted
)
{
return
CreatePromise
(
(
resolve
,
reject
)
=>
CompletePromise
(
valueTask
,
resolve
,
reject
)
)
;
}
return
(
(
IJavaScriptEngine
)
this
)
.
CreatePromiseForTask
(
valueTask
.
AsTask
(
)
)
;
}
#endregion
#region Nested type: ValueTaskConverter
private
static
class
ValueTaskConverter
<
T
>
{
// ReSharper disable UnusedMember.Local
public
static
object
ToPromise
(
ValueTask
<
T
>
valueTask
,
V8ScriptEngine
engine
)
{
return
valueTask
.
ToPromise
(
engine
)
;
}
// ReSharper restore UnusedMember.Local
}
#endregion
}
}
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