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30 lines
686 B
Go
30 lines
686 B
Go
// +build !windows,!plan9
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package sys
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import "os"
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// WaitForRead blocks until any of the given files is ready to be read. It
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// returns a boolean array indicating which files are ready to be read and
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// possible errors.
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//
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// It is implemented with select(2) on Unix and WaitForMultipleObjects on
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// Windows.
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func WaitForRead(files ...*os.File) (ready []bool, err error) {
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maxfd := 0
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fdset := NewFdSet()
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for _, file := range files {
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fd := int(file.Fd())
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if maxfd < fd {
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maxfd = fd
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}
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fdset.Set(fd)
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}
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err = Select(maxfd+1, fdset, nil, nil)
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ready = make([]bool, len(files))
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for i, file := range files {
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ready[i] = fdset.IsSet(int(file.Fd()))
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}
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return ready, err
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}
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