| // 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(); |
| } |
