mirror of
https://github.com/hajimehoshi/ebiten.git
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76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
// Copyright 2020 The Ebiten Authors
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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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//go:build ebitenginedebug || ebitendebug
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package debug
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import (
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"fmt"
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"sync"
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)
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const IsDebug = true
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var theLogger = &logger{}
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var flushM sync.Mutex
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// Logf calls the current global logger's Logf.
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// Logf buffers the arguments and doesn't dump the log immediately.
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// You can dump logs by calling SwitchLogger and Flush.
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//
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// Logf is not concurrent safe.
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func Logf(format string, args ...any) {
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theLogger.Logf(format, args...)
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}
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// SwitchLogger sets a new logger as the current logger and returns the original global logger.
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// The new global logger and the returned logger have separate statuses, so you can use them for different goroutines.
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//
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// SwitchLogger and a returned Logger are not concurrent safe.
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func SwitchLogger() Logger {
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current := theLogger
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theLogger = &logger{}
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return current
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}
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type logger struct {
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items []logItem
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}
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type logItem struct {
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format string
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args []any
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}
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func (l *logger) Logf(format string, args ...any) {
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l.items = append(l.items, logItem{
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format: format,
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args: args,
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})
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}
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func (l *logger) Flush() {
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// Flushing is protected by a mutex not to mix another logger's logs.
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flushM.Lock()
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defer flushM.Unlock()
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for i, item := range l.items {
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fmt.Printf(item.format, item.args...)
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l.items[i] = logItem{}
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}
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l.items = l.items[:0]
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}
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