func()

in sigar_openbsd.go [327:355]

• 20 lines of code
• 6 McCabe index (conditional complexity)

func (self *CpuList) Get() error {
	mib := [2]int32{C.CTL_HW, C.HW_NCPU}
	var ncpu int

	n := uintptr(0)
	// First we determine how much memory we'll need to pass later on (via `n`)
	_, _, errno := syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(unsafe.Pointer(&mib[0])), 2, 0, uintptr(unsafe.Pointer(&n)), 0, 0)

	if errno != 0 || n == 0 {
		return nil
	}

	// Now perform the actual sysctl(3) call, storing the result in ncpu
	_, _, errno = syscall.Syscall6(syscall.SYS___SYSCTL, uintptr(unsafe.Pointer(&mib[0])), 2, uintptr(unsafe.Pointer(&ncpu)), uintptr(unsafe.Pointer(&n)), 0, 0)

	if errno != 0 || n == 0 {
		return nil
	}

	load := [C.CPUSTATES]C.long{C.CP_USER, C.CP_NICE, C.CP_SYS, C.CP_INTR, C.CP_IDLE}

	self.List = make([]Cpu, ncpu)
	for curcpu := range self.List {
		sysctlCptime(ncpu, curcpu, &load)
		fillCpu(&self.List[curcpu], load)
	}

	return nil
}