Windows named share memory sample

WindowsSharedMemorySample-Read.cpp

#include <Windows.h>
#include <stdio.h>

int main()
{
    int     shmem_size = sizeof(unsigned int);
    HANDLE  shmem = INVALID_HANDLE_VALUE;
    HANDLE  mutex = INVALID_HANDLE_VALUE;

    mutex = CreateMutex(NULL, FALSE, L"mutex_name");

    shmem = CreateFileMapping(
        INVALID_HANDLE_VALUE,
        NULL,
        PAGE_READWRITE,
        0,
        shmem_size,
        L"shared_memory_name"
    );

    char *buf = (char*)MapViewOfFile(shmem, FILE_MAP_ALL_ACCESS, 0, 0, shmem_size);

    for (unsigned int i = 0; i < 100; i++) {
        WaitForSingleObject(mutex, INFINITE);

        printf("Read shared memory... %d\n", buf[0]);

        ReleaseMutex(mutex);

        Sleep(1000);
    }

    UnmapViewOfFile(buf);
    CloseHandle(shmem);
    ReleaseMutex(mutex);

    return 0;
}

WindowsSharedMemorySample-Write.cpp

#include <windows.h>
#include <stdio.h>

int main()
{
    int     shmem_size = sizeof(unsigned int);
    HANDLE  shmem = INVALID_HANDLE_VALUE;
    HANDLE  mutex = INVALID_HANDLE_VALUE;

    mutex = CreateMutex(NULL, FALSE, L"mutex_name");

    shmem = CreateFileMapping(
        INVALID_HANDLE_VALUE,
        NULL,
        PAGE_READWRITE,
        0,
        shmem_size,
        L"shared_memory_name"
    );

    char *buf = (char*)MapViewOfFile(shmem, FILE_MAP_ALL_ACCESS, 0, 0, shmem_size);

    for (unsigned int i = 0; i < 100; i++) {
        WaitForSingleObject(mutex, INFINITE);

        memset(buf, i, shmem_size);

        printf("Write shared memory... %d\n", i);

        ReleaseMutex(mutex);

        Sleep(1000);
    }

    UnmapViewOfFile(buf);
    CloseHandle(shmem);
    ReleaseMutex(mutex);

    return 0;
}