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38 lines
708 B
Go
38 lines
708 B
Go
package sysx
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import (
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"syscall"
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"unsafe"
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)
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var _zero uintptr
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// use is a no-op, but the compiler cannot see that it is.
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// Calling use(p) ensures that p is kept live until that point.
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//go:noescape
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func use(p unsafe.Pointer)
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// Do the interface allocations only once for common
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// Errno values.
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var (
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errEAGAIN error = syscall.EAGAIN
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errEINVAL error = syscall.EINVAL
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errENOENT error = syscall.ENOENT
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)
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// errnoErr returns common boxed Errno values, to prevent
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// allocations at runtime.
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func errnoErr(e syscall.Errno) error {
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switch e {
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case 0:
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return nil
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case syscall.EAGAIN:
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return errEAGAIN
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case syscall.EINVAL:
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return errEINVAL
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case syscall.ENOENT:
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return errENOENT
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}
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return e
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}
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