implements cpu_times on freebsd.

README.rst

@@ -56,7 +56,7 @@ Current Status
 
 - done
 
-  - cpu_times (linux)
+  - cpu_times (linux, freebsd)
   - cpu_count (linux, freebsd, windows)
   - virtual_memory (linux, windows)
   - swap_memory (linux)

cpu_freebsd.go

@@ -2,8 +2,49 @@
 
 package gopsutil
 
+import (
+	"strconv"
+)
+
+// sys/resource.h
+const (
+	CP_USER   = 0
+	CP_NICE   = 1
+	CP_SYS    = 2
+	CP_INTR   = 3
+	CP_IDLE   = 4
+	CPUSTATES = 5
+)
+
+// time.h
+const (
+	CLOCKS_PER_SEC = 128
+)
+
+// TODO: get per cpus
 func Cpu_times() ([]CPU_TimesStat, error) {
 	ret := make([]CPU_TimesStat, 0)
 
+	cpu_time, err := do_sysctrl("kern.cp_time")
+	if err != nil {
+		return ret, err
+	}
+
+	user, _ := strconv.ParseInt(cpu_time[CP_USER], 10, 64)
+	nice, _ := strconv.ParseInt(cpu_time[CP_NICE], 10, 64)
+	sys, _ := strconv.ParseInt(cpu_time[CP_SYS], 10, 64)
+	idle, _ := strconv.ParseInt(cpu_time[CP_IDLE], 10, 64)
+	intr, _ := strconv.ParseInt(cpu_time[CP_INTR], 10, 64)
+
+	c := CPU_TimesStat{
+		User:   uint64(user / CLOCKS_PER_SEC),
+		Nice:   uint64(nice / CLOCKS_PER_SEC),
+		System: uint64(sys / CLOCKS_PER_SEC),
+		Idle:   uint64(idle / CLOCKS_PER_SEC),
+		Irq:    uint64(intr / CLOCKS_PER_SEC), // FIXME: correct?
+	}
+
+	ret = append(ret, c)
+
 	return ret, nil
 }