blAckEnEd

#include <windows.h>#include <stdio.h>#define MAX_STOCK 10HANDLE hMapFile;LPVOID lpMapAddress;HANDLE hEventAccess;LPCSTR fEventProd="Access";		/************************************************************************ * void ErrorOut(LPSTR errstring) * * Purpose: Print out an meainful error code by means of *        GetLastError and printf * * Inputs:  errstring - the action that failed, passed by the *                    calling proc. * * Returns: none * * Calls:   GetLastError *\************************************************************************/void ErrorOut(LPSTR errstring){   MessageBox(NULL, errstring, NULL, MB_OK);}/************************************************************************** * HANDLE CreateMap(HANDLE FileToBeMapped, char *MapName ) * * Purpose: Create File Mapping object using the open file handle * * Inputs:  FileToBeMapped - handle to the file * * Returns: MapHandle - handle to the file mapping object *                    or NULL if failure * * Calls:   CreateFileMapping, ErrorOut\**************************************************************************/HANDLE CreateMap(HANDLE FileToBeMapped, LPSTR MapName){   HANDLE MapHandle;   MapHandle= CreateFileMapping(FileToBeMapped,                                NULL,                                PAGE_READWRITE,                                0,                                4096,                                MapName);   if (MapHandle == NULL)   {      ErrorOut("CreateFileMapping");      return(NULL);   }   else      return(MapHandle);}/************************************************************************** * LPVOID MapView(HANDLE hMap) * * Purpose: Map the file mapping object into address space * * Inputs:  hMap - handle to the mapping object * * Returns: MappedPointer - pointer to the address space that the *                        object is mapped into *                        or NULL if failure * * Calls:   MapViewOfFile, ErrorOut *\**************************************************************************/LPVOID MapView(HANDLE hMap){   LPVOID MappedPointer;   MappedPointer= MapViewOfFile(hMap,                                FILE_MAP_WRITE | FILE_MAP_READ,                                0, 0, 4096);   if (MappedPointer == NULL)   {      ErrorOut("MapViewOfFile");      return(NULL);   }   else      return(MappedPointer);}LPVOID ReadBytes(LPVOID from, LPVOID to, DWORD len){	return(memcpy(to,from,len));}LPVOID WriteBytes(LPVOID to, LPVOID from, DWORD len){	return(memcpy(to,from,len));}int main(){	MessageBox(NULL,"Producer started","Producer",MB_OK);	hMapFile = CreateMap((HANDLE) 0xFFFFFFFF, "Warehouse");	lpMapAddress = MapView(hMapFile);    int crt_items;    if (!(hEventAccess=OpenEvent(EVENT_ALL_ACCESS,TRUE,"Access")))    {	   hEventAccess=CreateEvent(NULL,FALSE,FALSE,"Access");	   // perform initialization of the shared memory zone	   crt_items = 0;	   WriteBytes(lpMapAddress, &crt_items, sizeof(int));    }    else    {        ReadBytes(lpMapAddress, &crt_items, sizeof(int));    }		// now we can set the event to let other processes run	SetEvent(hEventAccess);	for(;;)	{		WaitForSingleObject(hEventAccess, INFINITE);		ReadBytes(lpMapAddress, &crt_items, sizeof(int));		if (crt_items < MAX_STOCK)		{			crt_items++;			WriteBytes(lpMapAddress, &crt_items, sizeof(int));			printf("Produced 1 item\n");		}		else			printf("Stock full!\n");		Sleep(rand()/100);		SetEvent(hEventAccess);	}		//cleanup	UnmapViewOfFile(lpMapAddress);	CloseHandle(hMapFile);		return 0;}