34 lines
730 B
Go
34 lines
730 B
Go
// +build !freebsd,!windows,!plan9
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package goselect
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import "syscall"
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const FD_SETSIZE = syscall.FD_SETSIZE
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// FDSet wraps syscall.FdSet with convenience methods
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type FDSet syscall.FdSet
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// Set adds the fd to the set
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func (fds *FDSet) Set(fd uintptr) {
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fds.Bits[fd/NFDBITS] |= (1 << (fd % NFDBITS))
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}
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// Clear remove the fd from the set
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func (fds *FDSet) Clear(fd uintptr) {
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fds.Bits[fd/NFDBITS] &^= (1 << (fd % NFDBITS))
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}
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// IsSet check if the given fd is set
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func (fds *FDSet) IsSet(fd uintptr) bool {
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return fds.Bits[fd/NFDBITS]&(1<<(fd%NFDBITS)) != 0
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}
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// Keep a null set to avoid reinstatiation
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var nullFdSet = &FDSet{}
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// Zero empties the Set
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func (fds *FDSet) Zero() {
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copy(fds.Bits[:], (nullFdSet).Bits[:])
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}
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