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Codesys V3.5 骞冲彴   鎻愪緵浜嗗簱SysShm,鍏朵腑鍖呭惈浜嗗叡浜�鍐呭瓨鎿嶄綔鐨勬帴鍙ｅ嚱鏁帮細

SysSharedMemoryClose;

SysSharedMemoryCreate;

SysSharedMemoryDelete;

SysSharedMemoryGetPointer;

SysSharedMemoryOpen2;

SysSharedMemoryRead;

SysSharedMemoryReadByte;

SysSharedMemoryWrite;

SysSharedMemoryWriteByte;

涓庡叾杩涜�屽叡浜�鍐呭瓨閫氳��鐨勫钩鍙癓inux,window;涓嬬殑缂栫▼Demo:

Linux:

[C] 绾�鏂囨湰鏌ョ湅 澶嶅埗浠ｇ爜

#include <stdio.h>[/font][/color][/align]
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
 

struct DataExchange {
    int i1;
    int i2;
};
 

int main(int argc, char **argv)

 

{

    struct DataExchange *pRead, *pWrite;

    char sSharedMemReadName[100] = "_CODESYS_SharedMemoryTest_Write";

    char sSharedMemWriteName[100] = "_CODESYS_SharedMemoryTest_Read";

    int fdRead = shm_open(sSharedMemReadName, O_CREAT | O_RDWR, S_IRWXU | S_IRWXG);

    printf("Shared Memory Read: %s %d\n\n",sSharedMemReadName, fdRead);

    ftruncate(fdRead, sizeof(*pRead));

    pRead = mmap(0, sizeof(*pRead), PROT_READ | PROT_WRITE, MAP_SHARED, fdRead, 0);

    close(fdRead);

    int fdWrite = shm_open(sSharedMemWriteName, O_CREAT | O_RDWR, S_IRWXU | S_IRWXG);

    printf("Shared Memory Write: %s %d\n\n",sSharedMemWriteName, fdWrite);

    ftruncate(fdWrite, sizeof(*pWrite));

    pWrite = mmap(0, sizeof(*pWrite), PROT_READ | PROT_WRITE, MAP_SHARED, fdWrite, 0);

    close(fdWrite);

    do

        sleep(1);

        printf("pRead->i1: %d pRead->i2: %d pWrite->i1: %d pWrite->i2: %d\n",

         pRead->i1, pRead->i2, pWrite->i1, pWrite->i2);

        printf("Press 'Enter' to increment values or 'q' and then 'Enter' to quit\n");

        pWrite->i1++;

        pWrite->i2--;

    } while (getchar() != 'q');

    munmap(pRead, sizeof(*pRead));

    shm_unlink(sSharedMemReadName);

    munmap(pWrite, sizeof(*pWrite));

    shm_unlink(sSharedMemWriteName);

    exit(0);

}

鍦↙inux 涓嬬殑缂栫▼娉ㄦ剰 shm_open();鑻ヤ娇鐢ㄤ娇鏈夐棶棰橈紝鍙�浠ョ敤open()鍑芥暟鏇夸唬銆�

Linux涓嬪叡浜�鍐呭瓨鐨勫疄璐�锛氭槸鍦�/dev/shm/   鏂囦欢澶逛笅鍒涘缓鐩稿簲鏂囦欢锛岃矾寰勪负锛�  /dev/shm/鏂囦欢鍚嶏紱

Codesys鑻ヨ繍琛屼簬Linux涓嬪垯鏄�鍦ㄨ�ヨ矾寰勫垱寤哄叡浜�鏂囦欢銆�

Windows骞冲彴锛孋++/ C # 缂栫▼锛�

C++:

OpenFileMapping();

CreateFileMapping();

MapViewOfFile();

GetProcessWorkingSetSize(); //鏌ヨ�㈣繘绋嬫渶澶э紝鏈�灏忓伐浣滈泦鍐呭瓨澶у皬

SetProcessWorkingSetSize(); //璁惧畾杩涚▼鏈�澶э紝鏈�灏忓伐浣滈泦鍐呭瓨澶у皬锛屽湪杩涚▼鎸傝捣锛屾垨鏈�灏忓寲鏃讹紝灏嗛儴鍒嗗唴瀛樹氦鎹㈠埌铏氭嫙鍐呭瓨銆�

VirtualLock();   //閿佸畾杩涚▼鐨勮櫄鎷熷湴鍧�绌洪棿鐨勬寚瀹氬潡鍒扮墿鐞嗗唴瀛樸��

C#:

[C++] 绾�鏂囨湰鏌ョ湅 澶嶅埗浠ｇ爜

using System;
using System.IO.MemoryMappedFiles;
using System.Runtime.InteropServices;
using System.Threading;

namespace SharedMemoryWin
{

    // Example structure for data exchange
    internal struct DataExchange
    {
        internal Int32 i1;
        internal Int32 i2;
    }

    class Program
    {
        static void Main(string[] args)
        {
            DataExchange dataExchangeRead, dataExchangeWrite;           
            dataExchangeWrite.i1 = 0;
            dataExchangeWrite.i2 = 0;
           
            Console.Out.WriteLine("Press 'q' to quit");

            int dataSIze = Marshal.SizeOf(typeof(DataExchange));
           
            // Open a mapped file with read access and one with write access.
            using (var mmfRead = MemoryMappedFile.CreateOrOpen("_CODESYS_SharedMemoryTest_Write", dataSIze))
            using (var mmfWrite = MemoryMappedFile.CreateOrOpen("_CODESYS_SharedMemoryTest_Read", dataSIze))
            {
                bool quit = false;
                while (!quit)
                {
                    using (var accessorRead = mmfRead.CreateViewAccessor(0, dataSIze, MemoryMappedFileAccess.Read))
                    using (var accessorWrite = mmfWrite.CreateViewAccessor(0, dataSIze, MemoryMappedFileAccess.Write))
                    {
                        // Read the structure
                        accessorRead.Read(0, out dataExchangeRead);
                        // Write the structure
                        accessorWrite.Write(0, ref dataExchangeWrite);

                        // Display the values
                        Console.Out.Write("Read i1: {0} i2: {1}       Write i1: {2} i2: {3}\r",
                                            dataExchangeRead.i1,
                                            dataExchangeRead.i2,
                                            dataExchangeWrite.i1,
                                            dataExchangeWrite.i2);

                        // Wait a second
                        Thread.Sleep(1000);

                        // Increment sample values
                        dataExchangeWrite.i1++;
                        dataExchangeWrite.i2--;

                        // Check quit condition
                        if(Console.KeyAvailable)
                            if (Console.ReadKey().KeyChar == 'q')        
                                quit = true;
                    }
                }
            }
        }
    }
}

askina

杩欑�嶆槸涓嶆槸cosesys鍜孋#鍙�鑳藉湪鍚屼竴鍙扮數鑴戜笂

beginner

RTE 鍙�浠ョ敤鍚�