1 // Copyright 2011 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build ignore 6 7 #ifdef WIN32 8 // A Windows DLL is unable to call an arbitrary function in 9 // the main executable. Work around that by making the main 10 // executable pass the callback function pointer to us. 11 void (*goCallback)(void); 12 __declspec(dllexport) void setCallback(void *f) 13 { 14 goCallback = (void (*)())f; 15 } 16 __declspec(dllexport) void sofunc(void); 17 #else 18 extern void goCallback(void); 19 void setCallback(void *f) { (void)f; } 20 #endif 21 22 // OpenBSD and older Darwin lack TLS support 23 #if !defined(__OpenBSD__) && !defined(__APPLE__) 24 __thread int tlsvar = 12345; 25 #endif 26 27 void sofunc(void) 28 { 29 goCallback(); 30 } 31
