updown/jellyfish/demo/module/var.cs

using System;
using System.Text;
using System.Collections.Generic;
using System.Runtime.InteropServices;

namespace ocean
{
    class var
    {
        /****************************************************
            *Function: 设置一个变量, 基于ID查询，若不存在则返回错误
            *Intput: key 变量ID
                     pval 变量值
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "setd_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int setstring(int key, string pval);

        /****************************************************
            *Function: 设置一个变量值，基于变量名查询，若不存在则返回错误
            *Intput: key 变量名
                     pval 变量值
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "set_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int setstring(string key, string pval);

        /****************************************************
            *Function: 设置一个整型变量值
            *Intput: key 变量名
                     val 变量值
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "set_int_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int setint(string key, int val);

        /****************************************************
            *Function: 设置一个double型变量值
            *Intput: key 变量名
                     val 变量值
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "set_double_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int setdouble(string key, double val);

        /****************************************************
            *Function: 获取一个变量值,基于ID查询
            *Intput: key 变量ID
                     pval 变量值
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "getd_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int getstring(int key, StringBuilder pval);

        /****************************************************
            *Function: 获取一个变量值,基于name查询
            *Intput: key 变量名
                     pval 变量值
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "get_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int getstring(string key, StringBuilder pval);

        /****************************************************
            *Function: 获取一个整型变量值
            *Intput: key 变量名
            *Output: NULL
            *Return: 返回整型变量值，失败返回0
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "get_int_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int getint(string key);

        /****************************************************
            *Function: 获取一个double型变量值
            *Intput: key 变量名
            *Output: NULL
            *Return: 返回整型变量值，失败返回0
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "get_double_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern double getdouble(string key);

        /****************************************************
            *Function: 等待一个信号量（变量=目标值），并取反
            *Intput: key 变量名
                     val 变量值
            *Output: NULL
            *Return: 若成功等到信号量，则返回0，错误返回错误代码，
            无信号返回 ERR_TIMEOUT
            *PS: 有保护机制，保证只有一个线程能取得该信号
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "wait_int_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int waitint(string key, int val);

        /****************************************************
            *Function: 判断一个变量名是否存在
            *Intput: key 变量名称
            *Output: NULL
            *Return: 存在返回1，不存在返回0
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "is_var_exist", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int exist(string key);

        /****************************************************
            *Function: 删除一个变量，基于id
            *Intput: key 变量ID
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "delete_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        public static extern int del(int key);

        public static int create(string name, string desc, string val)
        {//创建一个变量
            TVar v = new TVar();
            v.name = name;      //名称
            v.desc = desc;      //描述
            v.val = val;        //初始值
            v.bkeep = 0;
            return create(ref v);
        }

        public static int update(int key, string name, string desc, string val)
        {//修改一个变量
            TVar v = new TVar();
            v.id = key;
            v.name = name;      //名称
            v.desc = desc;      //描述
            v.val = val;        //初始值
            v.bkeep = 0;
            return update(v);
        }

        public static int update(string name, string val)
        {//修改一个变量初始值及当前值
            int ret = 0;
            TVar v = new TVar();

            v.id = get_var_id(name);
            if (v.id <= 0)
            {//not exist
                return create(name, name, val);
            }

            get_info(v.id, ref v);
            v.val = val;
            ret = update(v);
            if (ret != 0) return ret;
            return setstring(v.id, val);   //设置当前值
        }

        #region nouse
        struct TVar
        {//变量结构体
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string name;    //变量名
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
            public string desc;    //描述
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256)]
            public string val;     //初始值
            public int id;
            public int bkeep;   //状态保持 1保持 0不保持 下次启动记住当前值
        };

        /****************************************************
            *Function: 创建一个变量，id传入无效，变量名不能重复
            *Intput: pvar 变量结构体
            *Output: NULL
            *Return: 成功返回id，大于0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "create_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern int create(ref TVar pvar);

        /****************************************************
            *Function: 修改一个变量，基于id
            *Intput: key 变量ID
                     pvar 变量结构体
            *Output: NULL
            *Return: 成功返回0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "update_var", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern int update_var(IntPtr p);
        private static int update(TVar pvar)
        {
            IntPtr ptr;
            int ret = 0;
            ptr = Marshal.AllocHGlobal(Marshal.SizeOf(pvar));
            Marshal.StructureToPtr(pvar, ptr, false);
            ret = update_var(ptr);
            Marshal.FreeHGlobal(ptr);
            return ret;
        }

        /****************************************************
            *Function: 获取一个变量ID，通过名称获取
            *Intput:   key 变量名
            *Output:   NULL
            *Return:   存在返回变量ID>0，不存在返回0
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "get_var_id", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern int get_var_id(string name);

        /****************************************************
            *Function: 获取一个变量信息
            *Intput: key 变量ID
                     pvar 变量结构体
            *Output: NULL
            *Return: 成功返回id，大于0 失败返回错误码
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "get_var_info", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern int get_info(int key, ref TVar pvar);

        /****************************************************
            *Function: 获取所有变量列表,可以先传空获取数量
            *Intput: pVarList 变量名存储列表
            *Output: pVarList 变量名存储列表
            *Return: 返回变量个数
        ******************************************************/
        [DllImport(@"var.dll", EntryPoint = "get_var_list", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.StdCall)]
        private static extern int get_var_list(IntPtr ptr);

        #endregion
    }
}