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2a0673f99f
Make sure no pointers to the stack are passed to g_idle_add, because at the time the callback gets executed on the main thread, the pointer might be invalid. Go might have reused the stack or grown the stack and the pointer is invalid. The concept used on Windows has been ported to Linux.
79 lines
1.1 KiB
Go
79 lines
1.1 KiB
Go
//go:build linux
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// +build linux
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package linux
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/*
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#cgo linux pkg-config: gtk+-3.0
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#include <stdio.h>
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#include "gtk/gtk.h"
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extern gboolean invokeCallbacks(void *);
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static inline void triggerInvokesOnMainThread() {
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g_idle_add((GSourceFunc)invokeCallbacks, NULL);
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}
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*/
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import "C"
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import (
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"runtime"
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"sync"
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"unsafe"
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"golang.org/x/sys/unix"
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)
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var (
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m sync.Mutex
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mainTid int
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dispatchq []func()
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)
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func invokeOnMainThread(f func()) {
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if tryInvokeOnCurrentGoRoutine(f) {
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return
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}
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m.Lock()
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dispatchq = append(dispatchq, f)
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m.Unlock()
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C.triggerInvokesOnMainThread()
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}
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func tryInvokeOnCurrentGoRoutine(f func()) bool {
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m.Lock()
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mainThreadID := mainTid
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m.Unlock()
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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if mainThreadID != unix.Gettid() {
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return false
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}
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f()
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return true
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}
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//export invokeCallbacks
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func invokeCallbacks(_ unsafe.Pointer) C.gboolean {
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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m.Lock()
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if mainTid == 0 {
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mainTid = unix.Gettid()
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}
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q := append([]func(){}, dispatchq...)
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dispatchq = []func(){}
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m.Unlock()
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for _, v := range q {
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v()
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}
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return C.G_SOURCE_REMOVE
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}
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