shm.c~

来自「这个资料非常不错」· C~ 代码 · 共 71 行

#include <sys/types.h>

#include <sys/ipc.h>

#include <sys/shm.h>

#define SHMKEY 74

#define K 1024

int shmid;

cleanup()

{

shmctl(shmid,IPC_RMID,0);

exit(0);

}

main()

{
int i;
	
int *pint;

char *addr1,*addr2;

extern char *shmat();

extern cleanup();

for (i=0;i<20;i++)

signal(i,cleanup);

shmid=shmget(SHMKEY,128*K,0777|IPC_CREAT);

addr1=shmat(shmid,0,0);

addr2=shmat(shmid,0,0);

printf("addr1 0x%x addr2 0x%x\n",addr1,addr2);

pint=(int*)addr1;

for (i=0;i<256;i++)

*pint++=i;

pint=(int*)addr1;

*pint=256;

pint=(int*)addr2;

for (i=0;i<256;i++)

printf("index %d\tvalue%d\n",i,*pint++);

shmdt(addr1);

shmdt(addr2);

pause();

}