#include <string>
#include <windows.h>

class SharedMemory
{
public:
    /// Open a shared memory
    SharedMemory(const std::string& name);
    /// Create a shared memory
    SharedMemory(const std::string& name,int size);
    /// auto close, destroy memory.
    ~SharedMemory();

    bool isReady() const;
    void* get();

private:
    HANDLE hMap;
    void* pMem;
};

class NamedMutex
{
public:
    NamedMutex(const std::string& name,bool create=false);
    ~NamedMutex();

    bool isReady() const;
    DWORD getError() const;

    /// If the mutex has been occupied by this process, wait() will return immediately.
    int wait();
    int wait_for(int ms);
    void release();
private:
    HANDLE hmtx;
    DWORD errcode;
};