github.com/huandu/go@v0.0.0-20151114150818-04e615e41150/misc/cgo/test/sigprocmask_linux.go (about)

     1  // Copyright 2015 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  package cgotest
     6  
     7  /*
     8  #cgo CFLAGS: -pthread
     9  #cgo LDFLAGS: -pthread
    10  extern int RunSigThread();
    11  extern int CheckBlocked();
    12  */
    13  import "C"
    14  import (
    15  	"os"
    16  	"os/signal"
    17  	"syscall"
    18  	"testing"
    19  )
    20  
    21  var blocked bool
    22  
    23  //export IntoGoAndBack
    24  func IntoGoAndBack() {
    25  	// Verify that SIGIO stays blocked on the C thread
    26  	// even when unblocked for signal.Notify().
    27  	signal.Notify(make(chan os.Signal), syscall.SIGIO)
    28  	blocked = C.CheckBlocked() != 0
    29  }
    30  
    31  func testSigProcMask(t *testing.T) {
    32  	if r := C.RunSigThread(); r != 0 {
    33  		t.Error("pthread_create/pthread_join failed")
    34  	}
    35  	if !blocked {
    36  		t.Error("Go runtime unblocked SIGIO")
    37  	}
    38  }