int main(int argc, char *argv[])
{
int opt;
opt = getopt(argc, argv, "cdpvs:gfm:");
if (opt == '?')
exit(EXIT_FAILURE);
if (opt == -1)
{
usage();
exit(EXIT_FAILURE);
}
key_t key = ftok(".", 's');
int semid;
switch (opt)
{
case 'c':
sem_create(key);
break;
case 'p':
semid = sem_open(key);
sem_p(semid);
sem_getval(semid);
break;
case 'v':
semid = sem_open(key);
sem_v(semid);
sem_getval(semid);
break;
case 'd':
semid = sem_open(key);
sem_d(semid);
break;
case 's':
semid = sem_open(key);
sem_setval(semid, atoi(optarg));
break;
case 'g':
semid = sem_open(key);
sem_getval(semid);
break;
case 'f':
semid = sem_open(key);
sem_getmode(semid);
break;
case 'm':
semid = sem_open(key);
sem_setmode(semid, argv[2]);
break;
}
return 0;
}
int main(int argc, char *argv[])
{
//int semid = sem_create(0x1111);
int semid = sem_open(0x1111);
if (semid < 0) {
perror("sem_open error");
return -1;
}
int ret = 0;
ret = sem_setval(semid, 1);
if (ret < 0) {
perror("sem_setval error");
return -1;
}
int val = 0;
ret = sem_getval(semid, &val);
if (ret < 0) {
perror("sem_getval error");
return -1;
}
// printf("val is %d.\n", val);
fork();
if ((ret = sem_p(semid)) < 0) {
perror("sem_p error");
return -1;
}
int i = 0;
printf("i %d, pid %d.\n", ++i, getpid());
sleep(3);
printf("i %d, pid %d.\n", ++i, getpid());
// printf("pid %d, p - v.\n", getpid());
// ret = sem_getval(semid, &val);
// printf("val is %d.\n", val);
if ((ret = sem_v(semid)) < 0) {
perror("sem_p error");
return -1;
}
ret = sem_getval(semid, &val);
// printf("val is %d.\n", val);
return ret;
}
int main(int argc, char *argv[])
{
int procnum = 10;
int loopnum = 100;
int i = 0, j = 0;
printf("please enter child process number:\n");
scanf("%d", &procnum);
printf("please enter child process test number:\n");
scanf("%d", &loopnum);
//create shm
int ret = 0;
int shmhdl = 0;
ret = IPC_CreateShm(".", sizeof(int), &shmhdl);
if (ret != 0) {
printf("fun IPC_CreatShm() error:%d.\n", ret);
return ret;
}
//create sem
int semid = 0;
ret = sem_creat(g_key, &semid);
if (ret != 0) {
if (ret == SEMERR_EEXIST) {
ret = sem_open(g_key, &semid);
if (ret != 0) {
printf("fun sem_open() error, %d.\n", ret);
return ret;
}
}
else {
return ret;
}
}
int val = 0;
ret = sem_getval(semid, &val);
if (ret != 0) {
printf("func sem_getval() err:%d.\n", ret);
return ret;
}
printf("sem val is %d.\n", val);
// pid_t pid;
// for (i = 0; i < procnum; i++) {
// pid = fork();
// if (pid == 0) {
// for (j = 0; j < loopnum; ++j) {
// TestFunc(loopnum);
// }
// exit(0);
// }
// }
// int childpid = 0;
// while ((childpid = waitpid(-1, NULL, 0)) > 0) {
// ;
// }
pthread_t tidarr[200];
for (; i < procnum; ++i) {
pthread_create(&tidarr[i], NULL, thread_routine, NULL);
}
for (i = 0; i < procnum; ++i) {
pthread_join(tidarr[i], NULL);
}
printf("parent process exit.\n");
return 0;
}
