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      1 // +build !android
      2 
      3 package cgotest
      4 
      5 /*
      6 void lockOSThreadCallback(void);
      7 inline static void lockOSThreadC(void)
      8 {
      9         lockOSThreadCallback();
     10 }
     11 int usleep(unsigned usec);
     12 */
     13 import "C"
     14 
     15 import (
     16 	"runtime"
     17 	"testing"
     18 )
     19 
     20 func init() {
     21 	// Same as test3775 but run during init so that
     22 	// there are two levels of internal runtime lock
     23 	// (1 for init, 1 for cgo).
     24 	// This would have been broken by CL 11663043.
     25 	C.lockOSThreadC()
     26 }
     27 
     28 func test3775(t *testing.T) {
     29 	// Used to panic because of the UnlockOSThread below.
     30 	C.lockOSThreadC()
     31 }
     32 
     33 //export lockOSThreadCallback
     34 func lockOSThreadCallback() {
     35 	runtime.LockOSThread()
     36 	runtime.UnlockOSThread()
     37 	go C.usleep(10000)
     38 	runtime.Gosched()
     39 }
     40