cwlmyjm/sharedmemory

template for shared memory

SharedMemory

Q&A

Q: What does the header do?
A: This is a template for shared memory.

Q: How many platforms it support?
A: It only support Windows now.
A: I have implemented linux version! I put it in linux branch!

Q: Does it has mutex in reading or writing?
A: No, you can implement mutex by yourself.
A: I have implemented mutex version! Try MutexSharedMemory!

Q: How to create a SharedMemory with specific length, like 10 bytes?
A: Define a struct contian 10 bytes or use char[10] as T.

Example one
    struct TenBytes{
        char[10] data;
    }
    SharedMemory<TenBytes> sm("SharedMemory", CREATE_RW);
Example two
    SharedMemory<char[10]> sm("SharedMemory", CREATE_RW);

Q: How to create a SharedMemory with initial value?
A: Use constructer to pass initial value!

How to use it?

#include <iostream>
#include "SharedMemory.h"

using namespace std;
using namespace SharedMemoryTemplate;

int main()
{
	try{
		auto sm = new SharedMemory<int>("SharedMemory", CREATE_RW);
		int a = 100;
		while (true)
		{
			sm->write(&a);
			cout << a << endl;
			a++;
		}
	}
	catch (ErrorCode error)
	{
		cout << error << endl;
	}
	system("pause");
	return 0;
}

#include <iostream>
#include "SharedMemory.h"

using namespace std;
using namespace SharedMemoryTemplate;

int main()
{
	try
	{
		auto sm = new SharedMemory<int>("SharedMemory", OPEN_RW);
		int a = 100;
		while (true)
		{
			sm->read(&a);
			cout << a << endl;
		}
	}
	catch (ErrorCode error)
	{
		cout << error << endl;
	}
	system("pause");
	return 0;
}