共享内存实现进程间通信
程序代码：
#include <windows.h>
#include <stdio.h>
int main()
{
int handle = 0xFFFFFFFFFFFFFFFF;
void* handle2 = INVALID_HANDLE_VALUE;
// Create a paging file-backed MMF to contain the edit control text.
// The MMF is 4 KB at most and is named MMFSharedData.
static HANDLE s_hFileMap = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, 4 * 1024, ("MMFSharedData"));
if (s_hFileMap != NULL) {
if (GetLastError() == ERROR_ALREADY_EXISTS) {
puts("Mapping already exists - not created.");
CloseHandle(s_hFileMap);
// See if a memory-mapped file named MMFSharedData already exists.
HANDLE hFileMapT = OpenFileMapping(FILE_MAP_READ | FILE_MAP_WRITE,
FALSE, TEXT("MMFSharedData"));
if (hFileMapT != NULL) {
// The MMF does exist, map it into the process's address space.
PVOID pView = MapViewOfFile(hFileMapT,
FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
if (pView != NULL) {
// Put the contents of the MMF into the edit control.
puts((PTSTR) pView);
UnmapViewOfFile(pView);
} else {
puts("Can't map view.");
}
CloseHandle(hFileMapT);
} else {
puts("Can't open mapping.");
}
} else {
// File mapping created successfully.
// Map a view of the file into the address space.
PVOID pView = MapViewOfFile(s_hFileMap,
FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, 0);
if (pView != NULL) {
// Put edit text into the MMF.
sprintf((char*)pView, "%s", "Some test data");
// Protect the MMF storage by unmapping it.
UnmapViewOfFile(pView);
} else {
puts("Can't map view of file.");
}
}
} else {
puts("Can't create file mapping.");
}
return 0;
}
[此贴子已经被作者于2016-1-28 10:16编辑过]
