libgo5.go

Documentation: cmd/cgo/internal/testcshared/testdata/libgo5

     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  // AwaitSIGIO blocks indefinitely until a SIGIO is reported.
    35  //
    36  //export AwaitSIGIO
    37  func AwaitSIGIO() {
    38  	<-sigioChan
    39  }
    40  
    41  // SawSIGIO reports whether we saw a SIGIO within a brief pause.
    42  //
    43  //export SawSIGIO
    44  func SawSIGIO() bool {
    45  	timer := time.NewTimer(100 * time.Millisecond)
    46  	select {
    47  	case <-sigioChan:
    48  		timer.Stop()
    49  		return true
    50  	case <-timer.C:
    51  		return false
    52  	}
    53  }
    54  
    55  func main() {
    56  }
    57
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