我自己写了一个类，就是创建一个共享内存，然后实现进程之间共享数据，比如A进程就是往内存里写入数据，B进程就是从内存里读取数据，当然这是需要加锁互斥的，我自己也写了一个锁，但是锁偶尔会出问题：
例如：A进程依次往内存里写入ABCDEFG，正常情况B读出也是ABCDEFG， 但是却会出现ABCCEFG这样的情况，请各位大侠指教一下
上代码
C/C++ code m_lpFileMapBuffer = MapViewOfFile(m_hFileMap, dwAccess, 0, 0, dwSize);LPVOID ShareMemory::GetBuffer(){ return (m_lpFileMapBuffer)?(m_lpFileMapBuffer):(NULL);}void ShareMemory::Lock(){ while ( InterlockedExchange(&m_lock, RESOURCE_IN_USE) == RESOURCE_IN_USE ) Sleep(1);}void ShareMemory::Unlock(){ InterlockedExchange(&m_lock, RESOURCE_IN_FREE);}BOOL ShareMemory::WriteData(char
*pData, DWORD dwSize){ Lock(); BOOL ret = FALSE; char
*p = (char
*)GetBuffer(); if (p) { memcpy(p, (char*)&pData, dwSize); ret = TRUE; } Unlock(); return ret;}BOOL ShareMemory::ReadData(char*
&pData, DWORD dwSize){ Lock(); BOOL ret = FALSE; char
*p = (char
*)GetBuffer(); if (p) { p = pData; ret = TRUE; } Unlock(); return ret;} |
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