Shared Memory APIs

 #include <sys/types.h>     #include <sys/ipc.h>     #include <sys/shm.h>     int  shmget  ( key_t key, size_t size, int shmflag );     int  shmctl  ( int shmid, int cmd, struct shmid_ds *buf );         void *  shmat  ( int shmid, const void *shmaddr, int shmflag );     int  shmdt  ( const void *shmaddr );