mirror of
https://git.sr.ht/~eliasnaur/gio
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Elias Naur
5a9edc9af8
We're about to move app/headless to gpu/headless, and it imports cocoainit. Signed-off-by: Elias Naur <mail@eliasnaur.com>
50 lines
941 B
Go
50 lines
941 B
Go
// SPDX-License-Identifier: Unlicense OR MIT
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// +build darwin,ios
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package log
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/*
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#cgo CFLAGS: -Werror -fmodules -fobjc-arc -x objective-c
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__attribute__ ((visibility ("hidden"))) void nslog(char *str);
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*/
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import "C"
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import (
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"bufio"
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"io"
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"log"
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"unsafe"
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_ "gioui.org/internal/cocoainit"
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)
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func init() {
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// macOS Console already includes timestamps.
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log.SetFlags(log.Flags() &^ log.LstdFlags)
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log.SetOutput(newNSLogWriter())
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}
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func newNSLogWriter() io.Writer {
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r, w := io.Pipe()
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go func() {
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// 1024 is an arbitrary truncation limit, taken from Android's
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// log buffer size.
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lineBuf := bufio.NewReaderSize(r, 1024)
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// The buffer to pass to C, including the terminating '\0'.
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buf := make([]byte, lineBuf.Size()+1)
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cbuf := (*C.char)(unsafe.Pointer(&buf[0]))
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for {
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line, _, err := lineBuf.ReadLine()
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if err != nil {
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break
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}
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copy(buf, line)
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buf[len(line)] = 0
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C.nslog(cbuf)
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}
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}()
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return w
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}
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