mirror of
https://github.com/hajimehoshi/ebiten.git
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36 lines
1.0 KiB
Go
36 lines
1.0 KiB
Go
// Copyright 2016 Hajime Hoshi
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build js
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package clock
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import (
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"syscall/js"
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"time"
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)
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var (
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jsPerformance = js.Global().Get("performance")
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jsNow = jsPerformance.Get("now").Call("bind", jsPerformance)
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)
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func now() int64 {
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// time.Now() is not reliable until GopherJS supports performance.now().
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//
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// performance.now is monotonic:
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// https://www.w3.org/TR/hr-time-2/#sec-monotonic-clock
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return int64(jsNow.Invoke().Float() * float64(time.Millisecond))
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}
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