comment updates for internal

g/internal/cmdenv/cmdenv.go

@@ -4,6 +4,7 @@
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://github.com/gogf/gf.
 
+// Package cmdenv provides access to certain variable for both command options and environment.
 package cmdenv
 
 import (
@@ -28,10 +29,13 @@ func init() {
 	}
 }
 
-// 获取指定名称的命令行参数，当不存在时获取环境变量参数，皆不存在时，返回给定的默认值。
-// 规则:
-// 1、命令行参数以小写字母格式，使用: gf.包名.变量名 传递；
-// 2、环境变量参数以大写字母格式，使用: GF_包名_变量名 传递；
+// Get returns the command line argument of the specified <key>.
+// If the argument does not exist, then it returns the environment variable with specified <key>.
+// It returns the default value <def> if none of them exists.
+//
+// Fetching Rules:
+// 1. Command line arguments are in lowercase format, eg: gf.<package name>.<variable name>;
+// 2. Environment arguments are in uppercase format, eg: GF_<package name>_<variable name>；
 func Get(key string, def...interface{}) *gvar.Var {
     value := interface{}(nil)
     if len(def) > 0 {

g/internal/empty/empty.go

@@ -4,15 +4,16 @@
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://github.com/gogf/gf.
 
+// Package empty provides checks for empty variables.
 package empty
 
 import (
 	"reflect"
 )
 
-// 判断给定的变量是否为空。
-// 整型为0, 布尔为false, slice/map长度为0, 其他为nil的情况，都为空。
-// 为空时返回true，否则返回false。
+// IsEmpty checks whether given <value> empty.
+// It returns true if <value> is in: 0, nil, false, "", len(slice/map/chan) == 0.
+// Or else it returns true.
 func IsEmpty(value interface{}) bool {
     if value == nil {
         return true

g/internal/mutex/mutex.go

@@ -4,11 +4,11 @@
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://github.com/gogf/gf.
 
+// Package mutex provides switch for sync.Mutex for concurrent safe feature.
 package mutex
 
 import "sync"
 
-// Mutex的封装，支持对并发安全开启/关闭的控制。
 type Mutex struct {
     sync.Mutex
     safe bool

g/internal/rwmutex/rwmutex.go

@@ -4,6 +4,7 @@
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://github.com/gogf/gf.
 
+// Package rwmutex provides switch for sync.RWMutex for concurrent safe feature.
 package rwmutex
 
 import "sync"

g/util/gpage/gpage.go

@@ -5,8 +5,6 @@
 // You can obtain one at https://github.com/gogf/gf.
 
 // Package gpage provides useful paging functionality for web pages.
-// 
-// 分页管理.
 package gpage
 
 import (