Modbus动态链接库供多语言使用 | Go
Modbus协议控制动态链接库
应用场景
基于各门语言都有各自的modbus协议库，且良莠不齐，而且在具体的框架下可能存在版本依赖问题，
而且对modbus协议存在比较多的细节处理，可以查看modbus slave、或者modbus poll中相关的配置可知，
数据类型对应读写寄存器个数、大小端的处理等等细节，所以将以常用的场景下的配置编写动态链接库供其他语言调用。
编程语言
因为我不会写C语言，这里使用Go语言编写代码，以C函数分享库的模式编译成动态链接库
将以Python与Node.js调用的示例演示
辅助工具下载地址
Modbus Poll: 激活码(仅供学习 5A5742575C5D10) -> 模拟主站
链接: https://pan.baidu.com/s/1Sk2m6HWTU0-hE82-BxPvKA 提取码: 1fwn
Modbus Slave: 激活码(仅供学习 5455415451475662) -> 模拟从站
链接: https://pan.baidu.com/s/137w1-2gGQ3bETvbyBefNQg 提取码: 9433
编写Go代码示例 使用Cgo引入C函数
- Modbus TCP示例
package main
/*
#include <stdlib.h>
*/
import (
"C"
"bytes"
"encoding/binary"
"fmt"
"log"
"math"
"time"
"github.com/goburrow/modbus"
)
import "strings"
var handler *modbus.TCPClientHandler
//export Connect
func Connect(ip *C.char, port C.int) C.int {
log.Printf("Connect ...")
handler = modbus.NewTCPClientHandler(fmt.Sprintf("%s:%d", C.GoString(ip), int(port)))
handler.Timeout = 250 * time.Millisecond
err := handler.Connect()
if err != nil {
log.Printf("Connect error: %v", err)
return -1
}
return 0
}
//export Close
func Close() C.int {
log.Printf("Close ...")
err := handler.Close()
if err != nil {
log.Printf("Close error: %v", err)
return -1
}
return 0
}
//ReadRegister 一般错误返回 -1 连接失败返回 -3
//export ReadRegister
func ReadRegister(slaveId C.int, address C.int, dataType *C.char, data *C.double) C.int {
var results []byte
var err error
handler.SlaveId = byte(slaveId)
client := modbus.NewClient(handler)
dt := C.GoString(dataType)
switch dt {
case "int16":
results, err = client.ReadInputRegisters(uint16(address), 1)
case "int32", "float":
results, err = client.ReadInputRegisters(uint16(address), 2)
case "int64", "double":
results, err = client.ReadInputRegisters(uint16(address), 4)
}
if err != nil {
switch {
case strings.Contains(err.Error(), "connection"):
log.Println("Connection error:", err)
return -3
case strings.Contains(err.Error(), "timeout"):
log.Println("Timeout error:", err)
return -1
default:
log.Println("Other error:", err)
return -1
}
}
var value float64
switch dt {
case "int16":
var intValue int16
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "int32":
var intValue int32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "float":
var floatValue float32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &floatValue)
value = float64(floatValue)
case "int64":
var intValue int64
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "double":
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &value)
}
if err != nil {
log.Println(err)
return -1
}
*data = C.double(value)
return 0
}
//ReadHoldingRegister 一般错误返回 -1 连接失败返回 -3
//export ReadHoldingRegister
func ReadHoldingRegister(slaveId C.int, address C.int, dataType *C.char, data *C.double) C.int {
var results []byte
var err error
handler.SlaveId = byte(slaveId)
client := modbus.NewClient(handler)
dt := C.GoString(dataType)
// startTime := time.Now()
switch dt {
case "int16":
results, err = client.ReadHoldingRegisters(uint16(address), 1)
case "int32", "float":
results, err = client.ReadHoldingRegisters(uint16(address), 2)
case "int64", "double":
results, err = client.ReadHoldingRegisters(uint16(address), 4)
}
// endTime := time.Now()
// // 计算时间差
// duration := endTime.Sub(startTime)
// fmt.Printf("Takes: %v\n", duration)
if err != nil {
switch {
case strings.Contains(err.Error(), "connection"):
log.Println("Connection error:", err)
return -3
case strings.Contains(err.Error(), "timeout"):
log.Println("Timeout error:", err)
return -1
default:
log.Println("Other error:", err)
return -1
}
}
var value float64
switch dt {
case "int16":
var intValue int16
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "int32":
var intValue int32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "float":
var floatValue float32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &floatValue)
value = float64(floatValue)
case "int64":
var intValue int64
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "double":
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &value)
}
if err != nil {
log.Println(err)
return -1
}
*data = C.double(value)
return 0
}
//export WriteRegister
func WriteRegister(slaveId C.int, address C.int, dataType *C.char, value C.double) C.int {
var err error
handler.SlaveId = byte(slaveId)
client := modbus.NewClient(handler)
dt := C.GoString(dataType)
switch dt {
case "int16":
var intValue int16 = int16(value)
_, err = client.WriteSingleRegister(uint16(address), uint16(intValue))
case "int32":
var intValue int32 = int32(value)
results := make([]byte, 4)
binary.BigEndian.PutUint32(results, uint32(intValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
case "float":
var floatValue float32 = float32(value)
results := make([]byte, 4)
binary.BigEndian.PutUint32(results, math.Float32bits(floatValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
case "int64":
var intValue int64 = int64(value)
results := make([]byte, 8)
binary.BigEndian.PutUint64(results, uint64(intValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
case "double":
var doubleValue float64 = float64(value)
results := make([]byte, 8)
binary.BigEndian.PutUint64(results, math.Float64bits(doubleValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
default:
return -1
}
if err != nil {
switch {
case strings.Contains(err.Error(), "connection"):
log.Println("Connection error:", err)
return -3
case strings.Contains(err.Error(), "timeout"):
log.Println("Timeout error:", err)
return -1
default:
log.Println("Other error:", err)
return -1
}
}
return 0
}
func main() {}
- Modbus RTU示例
package main
/*
#include <stdlib.h>
*/
import (
"C"
"bytes"
"encoding/binary"
"log"
"math"
"time"
"github.com/goburrow/modbus"
)
import "strings"
var handler *modbus.RTUClientHandler
//export Connect
func Connect(port *C.char, baudrate C.int) C.int {
log.Printf("Connect ...")
handler = modbus.NewRTUClientHandler(C.GoString(port))
handler.BaudRate = int(baudrate)
handler.DataBits = 8
handler.Parity = "N"
handler.StopBits = 1
handler.Timeout = 250 * time.Millisecond
err := handler.Connect()
if err != nil {
log.Printf("Connect error: %v", err)
return -1
}
return 0
}
//export Close
func Close() C.int {
log.Printf("Close ...")
err := handler.Close()
if err != nil {
log.Printf("Close error: %v", err)
return -1
}
return 0
}
//ReadRegister 一般错误返回 -1 连接失败返回 -3
//export ReadRegister
func ReadRegister(slaveId C.int, address C.int, dataType *C.char, data *C.double) C.int {
var results []byte
var err error
handler.SlaveId = byte(slaveId)
client := modbus.NewClient(handler)
dt := C.GoString(dataType)
switch dt {
case "int16":
results, err = client.ReadInputRegisters(uint16(address), 1)
case "int32", "float":
results, err = client.ReadInputRegisters(uint16(address), 2)
case "int64", "double":
results, err = client.ReadInputRegisters(uint16(address), 4)
}
if err != nil {
switch {
case strings.Contains(err.Error(), "connection"):
log.Println("Connection error:", err)
return -3
case strings.Contains(err.Error(), "timeout"):
log.Println("Timeout error:", err)
return -1
default:
log.Println("Other error:", err)
return -1
}
}
var value float64
switch dt {
case "int16":
var intValue int16
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "int32":
var intValue int32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "float":
var floatValue float32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &floatValue)
value = float64(floatValue)
case "int64":
var intValue int64
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "double":
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &value)
}
if err != nil {
log.Println(err)
return -1
}
*data = C.double(value)
return 0
}
//ReadHoldingRegister 一般错误返回 -1 连接失败返回 -3
//export ReadHoldingRegister
func ReadHoldingRegister(slaveId C.int, address C.int, dataType *C.char, data *C.double) C.int {
var results []byte
var err error
handler.SlaveId = byte(slaveId)
client := modbus.NewClient(handler)
dt := C.GoString(dataType)
// startTime := time.Now()
switch dt {
case "int16":
results, err = client.ReadHoldingRegisters(uint16(address), 1)
case "int32", "float":
results, err = client.ReadHoldingRegisters(uint16(address), 2)
case "int64", "double":
results, err = client.ReadHoldingRegisters(uint16(address), 4)
}
// endTime := time.Now()
// // 计算时间差
// duration := endTime.Sub(startTime)
// fmt.Printf("Takes: %v\n", duration)
if err != nil {
switch {
case strings.Contains(err.Error(), "connection"):
log.Println("Connection error:", err)
return -3
case strings.Contains(err.Error(), "timeout"):
log.Println("Timeout error:", err)
return -1
default:
log.Println("Other error:", err)
return -1
}
}
var value float64
switch dt {
case "int16":
var intValue int16
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "int32":
var intValue int32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "float":
var floatValue float32
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &floatValue)
value = float64(floatValue)
case "int64":
var intValue int64
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &intValue)
value = float64(intValue)
case "double":
err = binary.Read(bytes.NewReader(results), binary.BigEndian, &value)
}
if err != nil {
log.Println(err)
return -1
}
*data = C.double(value)
return 0
}
//export WriteRegister
func WriteRegister(slaveId C.int, address C.int, dataType *C.char, value C.double) C.int {
var err error
handler.SlaveId = byte(slaveId)
client := modbus.NewClient(handler)
dt := C.GoString(dataType)
switch dt {
case "int16":
var intValue int16 = int16(value)
_, err = client.WriteSingleRegister(uint16(address), uint16(intValue))
case "int32":
var intValue int32 = int32(value)
results := make([]byte, 4)
binary.BigEndian.PutUint32(results, uint32(intValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
case "float":
var floatValue float32 = float32(value)
results := make([]byte, 4)
binary.BigEndian.PutUint32(results, math.Float32bits(floatValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
case "int64":
var intValue int64 = int64(value)
results := make([]byte, 8)
binary.BigEndian.PutUint64(results, uint64(intValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
case "double":
var doubleValue float64 = float64(value)
results := make([]byte, 8)
binary.BigEndian.PutUint64(results, math.Float64bits(doubleValue))
_, err = client.WriteMultipleRegisters(uint16(address), uint16(len(results)/2), results)
default:
return -1
}
if err != nil {
switch {
case strings.Contains(err.Error(), "connection"):
log.Println("Connection error:", err)
return -3
case strings.Contains(err.Error(), "timeout"):
log.Println("Timeout error:", err)
return -1
default:
log.Println("Other error:", err)
return -1
}
}
return 0
}
func main() {}
编译动态链接库
Go语言支持交叉编译成各个平台的二进制运行程序，但是Cgo不支持，可以去寻找第三方库去处理这个问题，这里选择用Docker容器
- 编译命令
windows下是modbus.dll，Linux下是 modbus.so，Macos下是 modbus.dylib
go build -o modbus.so -buildmode=c-shared main.go
- 其他平台编译，比如树莓派，选择使用docker容器
这里找一个 arm32v7 的docker容器，可以通过 docker search arm32v7的方式去搜索，我是试了几个选了个node版本的容器，
不同版本里面的 GLIBC 可能不一样，需要先查看你的树莓派上 GLIBC版本，通过命令 strings /lib/*/libc.so.* | grep GLIBC，
根据版本我选择了node v16的版本下载镜像
- 下载镜像、创建容器
docker run -itd --name raspberry arm32v7/node:16
- 进入容器、安装go环境
wget -e http_proxy=127.0.0.1:10809 https://studygolang.com/dl/golang/go1.17.linux-armv6l.tar.gz
tar -zxvf go1.17.linux-armv6l.tar.gz go/
mv go /usr/local/go
# 安装vim
apt-get update
apt-get install vim -y
# 加入系统环境
vim /etc/profile # 加入内容到最后一行 export PATH=$PATH:/usr/local/go/bin
source /etc/profile # 每次进入容器都要执行一次，要是没有找到go命令的话
- 将Go代码文件拷贝至容器
docker cp modbus_dir raspberry:/ # 将modbus_dir拷贝至容器raspberry的 / 目录下
- 进入容器编译动态链接库
docker exec -it raspberry /bin/bash
cd modbus_dir
go build -o modbus.so -buildmode=c-shared main.go
- 将编译后的动态链接库拷贝到宿主机
exit # 退出容器
docker cp raspberry:/modbus_dir/modbus.so ./ # 拷贝至当前目录
应用示例
- Python
modbus tcp示例
import ctypes
import platform
# 加载共享库
print(platform.system())
if platform.system() == "Windows":
modbus = ctypes.CDLL('./modbus.dll')
elif platform.system() == "Darwin":
modbus = ctypes.CDLL('./modbus.dylib')
else: # 树莓派
modbus = ctypes.CDLL('./modbus.so')
# 定义函数参数类型和返回类型
modbus.ReadRegister.argtypes = [ctypes.c_int, ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_double)]
modbus.ReadRegister.restype = ctypes.c_int
modbus.WriteRegister.argtypes = [ctypes.c_int, ctypes.c_int, ctypes.c_char_p, ctypes.c_double]
modbus.WriteRegister.restype = ctypes.c_int
modbus.ReadHoldingRegister.argtypes = [ctypes.c_int, ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_double)]
modbus.ReadHoldingRegister.restype = ctypes.c_int
modbus.Connect.argtypes = [ctypes.c_char_p, ctypes.c_int]
modbus.Connect.restype = ctypes.c_int
modbus.Close.argtypes = []
modbus.Close.restype = ctypes.c_int
# 调用ReadRegister函数
modbus.Connect(b'192.168.1.138', 502)
# 写控制寄存器
for i in range(50):
data = ctypes.c_double()
result = modbus.WriteRegister(1, 30, b'float', 123.45 + i)
if result == -3:
print('Connect error.')
if result == 0:
print('Write success.')
# 读控制寄存器 | 读输入寄存器时改成 ReadRegister
for i in range(50):
data = ctypes.c_double()
result = modbus.ReadHoldingRegister(1, 30, b'int16', ctypes.byref(data))
print('Read Result:', result, data.value)
modbus.Close()
modbus rtu示例
import ctypes
import platform
# 加载共享库
print(platform.system())
if platform.system() == "Windows":
modbus = ctypes.CDLL('./modbus-rtu.dll')
elif platform.system() == "Darwin":
modbus = ctypes.CDLL('./modbus-rtu.dylib')
else: # 树莓派
modbus = ctypes.CDLL('./modbus-rtu.so')
# 定义函数参数类型和返回类型
modbus.ReadRegister.argtypes = [ctypes.c_int, ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_double)]
modbus.ReadRegister.restype = ctypes.c_int
modbus.WriteRegister.argtypes = [ctypes.c_int, ctypes.c_int, ctypes.c_char_p, ctypes.c_double]
modbus.WriteRegister.restype = ctypes.c_int
modbus.ReadHoldingRegister.argtypes = [ctypes.c_int, ctypes.c_int, ctypes.c_char_p, ctypes.POINTER(ctypes.c_double)]
modbus.ReadHoldingRegister.restype = ctypes.c_int
modbus.Connect.argtypes = [ctypes.c_char_p, ctypes.c_int]
modbus.Connect.restype = ctypes.c_int
modbus.Close.argtypes = []
modbus.Close.restype = ctypes.c_int
# 调用ReadRegister函数
modbus.Connect(b'COM2', 9600)
# 写控制寄存器
for i in range(50):
data = ctypes.c_double()
result = modbus.WriteRegister(1, 30, b'float', 123.45 + i)
if result == -3:
print('Connect error.')
if result == 0:
print('Write success.')
# 读控制寄存器 | 读输入寄存器时改成 ReadRegister
for i in range(50):
data = ctypes.c_double()
result = modbus.ReadHoldingRegister(1, 30, b'int16', ctypes.byref(data))
print('Read Result:', result, data.value)
modbus.Close()
- Node.js
这是我在electron进行软件开发过程中封装的函数
调用顺序: DefineModbus -> connectModbus -> writeRegisterAsync/readRegisterAsync/readHoldingRegisterAsync -> connectModbus
const ffi = require('ffi-napi');
const ref = require('ref-napi');
const double = ref.types.double;
const doublePtr = ref.refType(double);
const path = require('path');
import {checkPort} from './net';
let dllPath: string;
console.log(`当前平台: ${process.platform}`) // darwin
let dllName = 'modbus.dll';
if (process.platform === 'darwin') {
dllName = 'modbus.dylib';
}
if (process.env.MODE === 'development') {
dllPath = path.resolve(`extraResources/dlls/${dllName}`);
} else {
dllPath = path.join(process.resourcesPath, 'extraResources', 'dlls', dllName);
}
let modbus: any;
const closeModbus = () => {
return new Promise((resolve, reject) => {
modbus.Close.async(
(err: any, result: any) => {
if (err) {
reject(err);
} else {
resolve(result);
}
},
);
});
};
const connectModbus = (ip: string, port: number) => {
return new Promise((resolve, reject) => {
modbus.Connect.async(
ip,
port,
(err: any, result: any) => {
if (err) {
reject(err);
} else {
resolve(result);
}
},
);
});
};
const writeRegisterAsync = (
slaveId: number,
startAddress: number,
dataType: string,
val: number,
) => {
return new Promise((resolve, reject) => {
modbus.WriteRegister.async(
slaveId,
startAddress,
dataType,
val,
(err: any, result: any) => {
if (err) {
reject(err);
} else {
resolve(result);
}
},
);
});
};
const readRegisterAsync = (
slaveId: number,
startAddress: number,
dataType: string,
data: any,
) => {
return new Promise((resolve, reject) => {
modbus.ReadRegister.async(
slaveId,
startAddress,
dataType,
data,
(err: any, result: any) => {
if (err) {
reject(err);
} else {
resolve(result);
}
},
);
});
};
const readHoldingRegisterAsync = (
slaveId: number,
startAddress: number,
dataType: string,
data: any,
) => {
return new Promise((resolve, reject) => {
modbus.ReadHoldingRegister.async(
slaveId,
startAddress,
dataType,
data,
(err: any, result: any) => {
if (err) {
reject(err);
} else {
resolve(result);
}
},
);
});
};
/**
* modbus-serial库的使用
*/
export const ConnectModbus = async (ip: string, port: number) => {
try {
const result = await connectModbus(ip, port);
return [result, 0];
} catch (e) {
return [-1, 0];
}
}
export const CloseModbus = async () => {
try {
const result = await closeModbus();
return [result, 0];
} catch(e) {
return [-1, 0];
}
}
export const ReadByModbusTcp = async (
slaveId: number,
startAddress: number,
dataType: string,
method: string = 'Input',
) => {
const data = ref.alloc(double);
try {
let result: any;
if (method === 'Input') {
result = await readRegisterAsync(slaveId, startAddress, dataType, data);
} else {
result = await readHoldingRegisterAsync(slaveId, startAddress, dataType, data);
}
return [result, data.deref() as number];
} catch (e) {
console.log(`e :${e}`);
return [0, 0];
}
}
export const WriteByModbusTcp = async (
slaveId: number,
startAddress: number,
dataType: string,
val: number,
) => {
try {
const result: any = await writeRegisterAsync(
slaveId,
startAddress,
dataType,
val,
);
return [result, val];
} catch (e) {
return [0, 0];
}
}
export const DefineModbus = async () => {
try {
modbus = ffi.Library(dllPath, {
ReadRegister: ['int', ['int', 'int', 'string', doublePtr]],
ReadHoldingRegister: ['int', ['int', 'int', 'string', doublePtr]],
WriteRegister: ['int', ['int', 'int', 'string', 'double']],
Connect: ['int', ['string', 'int']],
Close: ['int', []],
});
console.log('Define Modbus Success.');
} catch (e) {
console.log(`defineModbus error: ${e}`);
}
return dllPath;
}
export const CheckConnected = async (ip: string, port: number) => {
try {
const result = await checkPort(ip, port);
return true;
} catch (e) {
return false;
}
}
最后
这里只写了 读写控制寄存器、读输入寄存器，支持数据类型 int16/int32/int64/float/double
可以根据需要加入自己的代码，比如线圈的读写控制设备启停等
动态链接库、源码地址
链接: https://pan.baidu.com/s/1q40gHnftqzGJtUgfws_sdw 提取码: 72o2
Modbus动态链接库供多语言使用 | Go的更多相关文章
- golang生成c-shared so供c语言或者golang调用到例子
1.golang生成c-shared类型到so 建立文件夹hello,创建main.go文件,内容如下 package main import "C" func main() {} ...
- Matlab生成动态链接库供C#调用
1.首先在Matlab中编写一个或几个.m文件 2.然后在命令空间中输入命令:deploytool 3.修改工程名称,修改需要生成文件后缀 4.添加类,添加文件,然后点击生成.
- 新手学python（2）：C语言调用完成数据库操作
继续介绍本人的python学习过程.本节介绍如何利用python调用c代码.内容还是基于音乐信息提取的过程,架构如图一.Python调用c实现的功能是利用python访问c语言完成mysql数据库操作 ...
- c#下调用dll动态链接库[转]
C# 调用传统的 API 动态链接库,是.NET开发经常被讨论的问题. 比如有这么一个动态链接库(delphi 语言): library DelphiDLL; uses SysUtils, Class ...
- 《30天自制操作系统》笔记(02)——导入C语言
<30天自制操作系统>笔记(02)——导入C语言 进度回顾 在上一篇,记录了计算机开机时加载IPL程序(initial program loader,一个nas汇编程序)的情况,包括IPL ...
- [自制简单操作系统] 1、从0-1到汇编再到c语言的奥秘
目录: 1.用0-1编写最简单的操作系统 2.用汇编改写上面0-1程序 2.1 只用DB的汇编改写版 2.2 加入RESB汇编的改写版 2.3 进一步使用汇编替换0-1文件 2.4 核心程序也用 ...
- 使用swift语言进行IOS应用开发
在Swift中能够直接使用Objective-C语言提供的api (包括系统框架与自己的定制代码),也能够在Objective-C中使用Swift提供的类和api ,还能够在一个工程中同时混合使用Sw ...
- Sword redis C语言接口介绍
hiredis安装 hiredis是redis官方推荐的基于C接口的客户端组件,它提供接口,供c语言调用以操作数据库. 在redis的源码包的deps/hiredis下就有它的源码 安装方法,进入de ...
- 【go】go语言socket通信样例
server.go package main import ( "net" "fmt" "io" ) func main() { liste ...
- C 语言疑难杂症 [转：http://blog.chinaunix.net/uid-20688544-id-1894880.html]
无聊在网上找了些C语言的东东练一下手,竟然发现其实还有好多细节之前,没注意到,该好好复习一下先. 解决掉的问题先不发出来,把疑问的先做个笔记,过几天解决了就回来修改补上. #include < ...
随机推荐
- CMU15445 (Fall 2020) 数据库系统 Project#2 - B+ Tree 详解（上篇）
前言 考虑到 B+ 树较为复杂,CMU15-445 将 B+ 树实验拆成了两部分,这篇博客将介绍 Checkpoint#1 部分的实现过程,搭配教材 <DataBase System Conce ...
- c++中vector容器的用法
C语言中const关键字是constant的缩写,通常翻译为常量.常数等,它可以修饰变量.数组.指针.函数参数. vector 是向量类型,它可以容纳许多类型的数据,如若干个整数,所以称其为容器.ve ...
- Elastaticsearch 集群部署
系统Ubuntu 16.04 Elastaticsearch 5.6.9 Kibana 5.6.9 官网地址 https://www.elastic.co/products/elasticsearch ...
- C++面试八股文：什么是左值，什么是右值？
某日二师兄参加XXX科技公司的C++工程师开发岗位第16面: 面试官:什么是左值,什么是右值? 二师兄:简单来说,左值就是可以使用&符号取地址的值,而右值一般不可以使用&符号取地址. ...
- 云上使用 Stable Diffusion ，模型数据如何共享和存储
随着人工智能技术的爆发,内容生成式人工智能(AIGC)成为了当下热门领域.除了 ChatGPT 之外,文本生成图像技术更令人惊艳. Stable Diffusion,是一款开源的深度学习模型.与 Mi ...
- React后台管理系统 03全局样式scss
安装scss样式依赖,使用命令 npm i --save-dev sass --dev 会将依赖安装在devDependencies=>开发环境的依赖. 我们在src目录下的assets下创建 ...
- Solon Web 也支持响应式开发了？!
"solon.web.flux" 是 solon v2.3.6 新推出的生态插件,为 solon web 提供响应式接口支持 (io.projectreactor) .为什么叫这个 ...
- 使用numpy实现bert模型，使用hugging face 或pytorch训练模型，保存参数为numpy格式，然后使用numpy加载模型推理，可在树莓派上运行
之前分别用numpy实现了mlp,cnn,lstm,这次搞一个大一点的模型bert,纯numpy实现,最重要的是可在树莓派上或其他不能安装pytorch的板子上运行,推理数据 本次模型是随便在hugg ...
- 1.7 完善自定位ShellCode后门
在之前的文章中,我们实现了一个正向的匿名管道ShellCode后门,为了保证文章的简洁易懂并没有增加针对调用函数的动态定位功能,此类方法在更换系统后则由于地址变化导致我们的后门无法正常使用,接下来将实 ...
- matlab gui .mat数据读取
在matlab的gui中用load函数读取.mat等类型数据 %定义全局变量 global img_correct %读取数据名称及位置 [filename,pathname]=uigetfile({ ...