mirror of
https://github.com/golang/go
synced 2024-11-24 13:40:19 -07:00
53c9c06811
On AIX, shared objects must be wrapped under an archive file. For testso, creating libcgosotest with an extern symbol isn't AIX-friendly. By default, ld will block such behavior. Rather than forcing ld to work as on Linux and using the run-time linking, goCallback became a function pointer which is set by setCallback(). Updates #30565 Change-Id: I455ab32faddd41f1b0c84cc9e503788044ad49b2 Reviewed-on: https://go-review.googlesource.com/c/go/+/169020 Run-TryBot: Ian Lance Taylor <iant@golang.org> Reviewed-by: 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.
|
|
|
|
// +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();
|
|
}
|