#pragma comment(lib, "Wininet")
#include <Windows.h>
#include <WinInet.h>
#include <tlhelp32.h>
#include <iostream>
#include <tchar.h>
#include <conio.h>
#include <tlhelp32.h>
#include <stdio.h>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

#define BUF_SIZE 5000

DWORD* buffer;


HANDLE OpenAndReturnFileMapping(const char* name)
{
	HANDLE hMap = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, name);
	if (hMap == NULL)
	{
		printf("OpenFileMapping failed with error 0x%08x\n", GetLastError());
		return NULL;
	}
	return hMap;
}


HANDLE OpenAndReturnMutex(HANDLE hMap, const char* name)
{
	HANDLE hMutex = OpenMutex(SYNCHRONIZE, FALSE, name);
	if (hMutex == NULL)
	{
		printf("OpenMutex failed with error 0x%08x\n", GetLastError());
		CloseHandle(hMap);
		return NULL;
	}
	return hMutex;
}

DWORD* CreateAndReturnMapViewOfFile(HANDLE hMap, HANDLE hSync)
{
	DWORD* pMap = (DWORD*)MapViewOfFile(hMap, FILE_MAP_WRITE, 0, 0, BUF_SIZE);
	if (pMap == NULL)
	{
		printf("MapViewOfFile failed with error 0x%08x\n", GetLastError());
		CloseHandle(hMap);
		CloseHandle(hSync);
		return NULL;
	}
	return pMap;
}


void MutexReadFromMappedFile()
{
	HANDLE hMap = OpenAndReturnFileMapping("ProjectFile");
	if (hMap == NULL) return;

	HANDLE hMutex = OpenAndReturnMutex(hMap, "shared_mutex");
	if (hMutex == NULL) return;

	int iteration = 0;
	int numbersRead = 0;
	while (1)
	{
		if (WaitForSingleObject(hMutex, INFINITE) != WAIT_OBJECT_0) {
			printf("WaitForSingleObject failed with error 0x%08x\n", GetLastError());
			return;
		}

		buffer = CreateAndReturnMapViewOfFile(hMap, hMutex);
		if (buffer == NULL) return;

		ReleaseMutex(hMutex);
	}


	CloseHandle(hMutex);
	CloseHandle(hMap);
	UnmapViewOfFile(buffer);
}

DWORD WINAPI secondProcess(LPVOID lpParam) {
	cout << "process start" << endl;

	MutexReadFromMappedFile();
	return 0;
}

int main() {
	secondProcess(NULL);
	system("pause");
	return 0;
}