mirror of
https://github.com/golang/go
synced 2024-11-14 20:40:32 -07:00
369d7119de
Change-Id: Iae6ac32db5c2aacb323793a7e0dc34e09648d035 Reviewed-on: https://go-review.googlesource.com/c/go/+/482295 Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> Auto-Submit: Ian Lance Taylor <iant@golang.org>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
// Copyright 2011 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
//go:build ignore
|
|
|
|
#ifdef WIN32
|
|
// A Windows DLL is unable to call an arbitrary function in
|
|
// the main executable. Work around that by making the main
|
|
// executable pass the callback function pointer to us.
|
|
void (*goCallback)(void);
|
|
__declspec(dllexport) void setCallback(void *f)
|
|
{
|
|
goCallback = (void (*)())f;
|
|
}
|
|
__declspec(dllexport) void sofunc(void);
|
|
#elif defined(_AIX)
|
|
// AIX doesn't allow the creation of a shared object with an
|
|
// undefined symbol. It's possible to bypass this problem by
|
|
// using -Wl,-G and -Wl,-brtl option which allows run-time linking.
|
|
// However, that's not how most of AIX shared object works.
|
|
// Therefore, it's better to consider goCallback as a pointer and
|
|
// to set up during an init function.
|
|
void (*goCallback)(void);
|
|
void setCallback(void *f) { goCallback = f; }
|
|
#else
|
|
extern void goCallback(void);
|
|
void setCallback(void *f) { (void)f; }
|
|
#endif
|
|
|
|
// OpenBSD and older Darwin lack TLS support
|
|
#if !defined(__OpenBSD__) && !defined(__APPLE__)
|
|
__thread int tlsvar = 12345;
|
|
#endif
|
|
|
|
void sofunc(void)
|
|
{
|
|
goCallback();
|
|
}
|