转载:
转载:
转载:
// ServerCom.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include#include #pragma endregion#define MAP_PREFIX L"Local\\"#define MAP_NAME L"SampleMap"#define FULL_MAP_NAME MAP_PREFIX MAP_NAME// Max size of the file mapping object.#define MAP_SIZE 65536// File offset where the view is to begin.#define VIEW_OFFSET 0// The number of bytes of a file mapping to map to the view. All bytes of the // view must be within the maximum size of the file mapping object (MAP_SIZE). // If VIEW_SIZE is 0, the mapping extends from the offset (VIEW_OFFSET) to // the end of the file mapping.#define VIEW_SIZE 1024// Unicode string message to be written to the mapped view. Its size in byte // must be less than the view size (VIEW_SIZE).#define MESSAGE L"Message from the first process."int _tmain(int argc, _TCHAR* argv[]){ HANDLE hMapFile = NULL; PVOID pView = NULL; // Create the file mapping object. hMapFile = CreateFileMapping( INVALID_HANDLE_VALUE, // Use paging file - shared memory NULL, // Default security attributes PAGE_READWRITE, // Allow read and write access 0, // High-order DWORD of file mapping max size MAP_SIZE, // Low-order DWORD of file mapping max size FULL_MAP_NAME // Name of the file mapping object ); if (hMapFile == NULL) { wprintf(L"CreateFileMapping failed w/err 0x%08lx\n", GetLastError()); goto Cleanup; } wprintf(L"The file mapping (%s) is created\n", FULL_MAP_NAME); // Map a view of the file mapping into the address space of the current // process. pView = MapViewOfFile( hMapFile, // Handle of the map object FILE_MAP_ALL_ACCESS, // Read and write access 0, // High-order DWORD of the file offset VIEW_OFFSET, // Low-order DWORD of the file offset VIEW_SIZE // The number of bytes to map to view ); if (pView == NULL) { wprintf(L"MapViewOfFile failed w/err 0x%08lx\n", GetLastError()); goto Cleanup; } wprintf(L"The file view is mapped\n"); // Prepare a message to be written to the view. PWSTR pszMessage = MESSAGE; DWORD cbMessage = (wcslen(pszMessage) + 1) * sizeof(*pszMessage); // Write the message to the view. memcpy_s(pView, VIEW_SIZE, pszMessage, cbMessage); wprintf(L"This message is written to the view:\n\"%s\"\n", pszMessage); // Wait to clean up resources and stop the process. wprintf(L"Press ENTER to clean up resources and quit"); getchar();Cleanup: if (hMapFile) { if (pView) { // Unmap the file view. UnmapViewOfFile(pView); pView = NULL; } // Close the file mapping object. CloseHandle(hMapFile); hMapFile = NULL; } return 0;}
// ClientCom.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include#include #pragma endregion#define MAP_PREFIX L"Local\\"#define MAP_NAME L"SampleMap"#define FULL_MAP_NAME MAP_PREFIX MAP_NAME// File offset where the view is to begin.#define VIEW_OFFSET 0// The number of bytes of a file mapping to map to the view. All bytes of the // view must be within the maximum size of the file mapping object. If // VIEW_SIZE is 0, the mapping extends from the offset (VIEW_OFFSET) to the // end of the file mapping.#define VIEW_SIZE 1024int _tmain(int argc, _TCHAR* argv[]){ HANDLE hMapFile = NULL; PVOID pView = NULL; // Try to open the named file mapping identified by the map name. hMapFile = OpenFileMapping( FILE_MAP_READ, // Read access FALSE, // Do not inherit the name FULL_MAP_NAME // File mapping name ); if (hMapFile == NULL) { wprintf(L"OpenFileMapping failed w/err 0x%08lx\n", GetLastError()); goto Cleanup; } wprintf(L"The file mapping (%s) is opened\n", FULL_MAP_NAME); // Map a view of the file mapping into the address space of the current // process. pView = MapViewOfFile( hMapFile, // Handle of the map object FILE_MAP_READ, // Read access 0, // High-order DWORD of the file offset VIEW_OFFSET, // Low-order DWORD of the file offset VIEW_SIZE // The number of bytes to map to view ); if (pView == NULL) { wprintf(L"MapViewOfFile failed w/err 0x%08lx\n", GetLastError()); goto Cleanup; } wprintf(L"The file view is mapped\n"); // Read and display the content in view. wprintf(L"Read from the file mapping:\n\"%s\"\n", (PWSTR)pView); // Wait to clean up resources and stop the process. wprintf(L"Press ENTER to clean up resources and quit"); getchar();Cleanup: if (hMapFile) { if (pView) { // Unmap the file view. UnmapViewOfFile(pView); pView = NULL; } // Close the file mapping object. CloseHandle(hMapFile); hMapFile = NULL; } return 0;}
注:运行的时候先运行写入的进程，再运行读出的进程
