libgo3.go

Documentation: cmd/cgo/internal/testcarchive/testdata/libgo3

     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  import "C"
     8  
     9  import (
    10  	"os"
    11  	"os/signal"
    12  	"syscall"
    13  	"time"
    14  )
    15  
    16  // The channel used to read SIGIO signals.
    17  var sigioChan chan os.Signal
    18  
    19  // CatchSIGIO starts catching SIGIO signals.
    20  //
    21  //export CatchSIGIO
    22  func CatchSIGIO() {
    23  	sigioChan = make(chan os.Signal, 1)
    24  	signal.Notify(sigioChan, syscall.SIGIO)
    25  }
    26  
    27  // ResetSIGIO stops catching SIGIO signals.
    28  //
    29  //export ResetSIGIO
    30  func ResetSIGIO() {
    31  	signal.Reset(syscall.SIGIO)
    32  }
    33  
    34  // SawSIGIO reports whether we saw a SIGIO.
    35  //
    36  //export SawSIGIO
    37  func SawSIGIO() C.int {
    38  	select {
    39  	case <-sigioChan:
    40  		return 1
    41  	case <-time.After(5 * time.Second):
    42  		return 0
    43  	}
    44  }
    45  
    46  // ProvokeSIGPIPE provokes a kernel-initiated SIGPIPE.
    47  //
    48  //export ProvokeSIGPIPE
    49  func ProvokeSIGPIPE() {
    50  	r, w, err := os.Pipe()
    51  	if err != nil {
    52  		panic(err)
    53  	}
    54  	r.Close()
    55  	defer w.Close()
    56  	w.Write([]byte("some data"))
    57  }
    58  
    59  func main() {
    60  }
    61
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