initial import

core/proc/env.go

@@ -0,0 +1,43 @@
+package proc
+
+import (
+	"os"
+	"strconv"
+	"sync"
+)
+
+var (
+	envs    = make(map[string]string)
+	envLock sync.RWMutex
+)
+
+func Env(name string) string {
+	envLock.RLock()
+	val, ok := envs[name]
+	envLock.RUnlock()
+
+	if ok {
+		return val
+	}
+
+	val = os.Getenv(name)
+	envLock.Lock()
+	envs[name] = val
+	envLock.Unlock()
+
+	return val
+}
+
+func EnvInt(name string) (int, bool) {
+	val := Env(name)
+	if len(val) == 0 {
+		return 0, false
+	}
+
+	n, err := strconv.Atoi(val)
+	if err != nil {
+		return 0, false
+	}
+
+	return n, true
+}