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6919b9879b
Use a single exported implementation, so that we can maintain the GoDoc string in one place, and use non-exported functions for the actual implementation (which were already in place). Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
24 lines
522 B
Go
24 lines
522 B
Go
package sysinfo // import "github.com/docker/docker/pkg/sysinfo"
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import (
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"golang.org/x/sys/unix"
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)
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// numCPU queries the system for the count of threads available
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// for use to this process.
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//
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// Issues two syscalls.
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// Returns 0 on errors. Use |runtime.NumCPU| in that case.
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func numCPU() int {
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// Gets the affinity mask for a process: The very one invoking this function.
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pid := unix.Getpid()
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var mask unix.CPUSet
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err := unix.SchedGetaffinity(pid, &mask)
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if err != nil {
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return 0
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}
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return mask.Count()
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}
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