github.com/euank/go@v0.0.0-20160829210321-495514729181/misc/cgo/testcarchive/src/libgo4/libgo4.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 main
     6  
     7  /*
     8  #include <signal.h>
     9  #include <pthread.h>
    10  
    11  // Raise SIGIO.
    12  static void CRaiseSIGIO(pthread_t* p) {
    13  	pthread_kill(*p, SIGIO);
    14  }
    15  */
    16  import "C"
    17  
    18  import (
    19  	"os"
    20  	"os/signal"
    21  	"sync/atomic"
    22  	"syscall"
    23  )
    24  
    25  var sigioCount int32
    26  
    27  // Catch SIGIO.
    28  //export GoCatchSIGIO
    29  func GoCatchSIGIO() {
    30  	c := make(chan os.Signal, 1)
    31  	signal.Notify(c, syscall.SIGIO)
    32  	go func() {
    33  		for range c {
    34  			atomic.AddInt32(&sigioCount, 1)
    35  		}
    36  	}()
    37  }
    38  
    39  // Raise SIGIO.
    40  //export GoRaiseSIGIO
    41  func GoRaiseSIGIO(p *C.pthread_t) {
    42  	C.CRaiseSIGIO(p)
    43  }
    44  
    45  // Return the number of SIGIO signals seen.
    46  //export SIGIOCount
    47  func SIGIOCount() C.int {
    48  	return C.int(atomic.LoadInt32(&sigioCount))
    49  }
    50  
    51  func main() {
    52  }