建立程序間共享記憶體對映

1、首先建立乙個互斥體物件。

#define share_mutex _t("your mutex name")

handle hsharemuex = openmutex(mutex_all_access,false,share_mutex);
if(hsharemuex==null)
;	}

#define share_mapfile _t("your mapfile name")

if (hmapfile == null)

3、讀寫共享記憶體的函式

struct sharememory

//獲取共享記憶體資料並鎖定
static bool getsharememory_lock(out handle& hhandle,sharememory* psf=null)
dword dwret=waitforsingleobject(hmutex,infinite);
if(dwret!=wait_object_0)
hhandle=hmutex;
if(hmap==null)
void* pfile = mapviewoffile(hmap, file_map_write | file_map_read, 0, 0, 0);
if (pfile == null)
if(psf!=null)
*psf = *(sharememory*)pfile;
unmapviewoffile(pfile);
closehandle(hmap);
// 	releasemutex(hmutex);
//	closehandle(hmutex);
return true;
}//寫入共享記憶體資料並解鎖
static bool setsharememory_unlock(in handle hhandle,sharememory* psf=null)
void* pfile = mapviewoffile(hmap, file_map_write | file_map_read, 0, 0, 0);
if (pfile == null)
if(psf!=null)
*(sharememory*)pfile = *psf;
bool s=flushviewoffile(pfile,sizeof(sharememory));
// 	sharememory temp;
// 	temp=*(sharememory*)mapviewoffile(hmap, file_map_write | file_map_read, 0, 0, 0);
unmapviewoffile(pfile);
closehandle(hmap);
releasemutex(hmutex);
closehandle(hmutex);
return true;
}static bool getsharememory(sharememory& sf)
dword dwret=waitforsingleobject(hmutex,infinite);
if(dwret!=wait_object_0)
if(hmap==null)
void* pfile = mapviewoffile(hmap, file_map_write | file_map_read, 0, 0, 0);
if (pfile == null)
sf = *(sharememory*)pfile;
unmapviewoffile(pfile);
closehandle(hmap);
releasemutex(hmutex);
closehandle(hmutex);
return true;
}

程序間共享記憶體

位於系統的交換分割槽 include incude int shmget key t key,size t size,int shm ipc excl ipc creat一起使用可確保共享記憶體已存在時返回錯誤 void shmat int shm id,const void shm addr,in...

程序間通訊 共享記憶體

下面是自己寫的乙個簡單的共享記憶體的程序間通訊的例子。共享記憶體是用於程序間大量資料共享的一種方法。include include include include include include int main if buf1 shmat shmid,0,0 void 1 strcpy buf1,...

linux 程序間共享記憶體

可以採用sysv的shmget shmat 實現。但是我更喜歡shm open mmap 更簡單。writer.c include include include include include include include include struct ofs stat int main voi...