libgo4.go

Documentation: cmd/cgo/internal/testcarchive/testdata/libgo4

     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  //
    29  //export GoCatchSIGIO
    30  func GoCatchSIGIO() {
    31  	c := make(chan os.Signal, 1)
    32  	signal.Notify(c, syscall.SIGIO)
    33  	go func() {
    34  		for range c {
    35  			atomic.AddInt32(&sigioCount, 1)
    36  		}
    37  	}()
    38  }
    39  
    40  // Raise SIGIO.
    41  //
    42  //export GoRaiseSIGIO
    43  func GoRaiseSIGIO(p *C.pthread_t) {
    44  	C.CRaiseSIGIO(p)
    45  }
    46  
    47  // Return the number of SIGIO signals seen.
    48  //
    49  //export SIGIOCount
    50  func SIGIOCount() C.int {
    51  	return C.int(atomic.LoadInt32(&sigioCount))
    52  }
    53  
    54  func main() {
    55  }
    56
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