# aso method feature tests

aso fcntl note{ fcntl(F_SETLCK[W]) work }end link{

#include <sys/types.h>

#include <unistd.h>

#include <fcntl.h>

int main()

{

struct flock lock;

lock.l_type = F_WRLCK;

lock.l_whence = SEEK_SET;

lock.l_start = 0;

lock.l_len = 1;

return fcntl(1, F_SETLKW, &lock) < 0;

}

}end

aso semaphore note{ semget semop semctl work }end link{

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

#include <fcntl.h>

#include <sys/ipc.h>

#include <sys/sem.h>

int main()

{

int id;

struct sembuf sem;

if ((id = semget(IPC_PRIVATE, 16, IPC_CREAT|IPC_EXCL|S_IRUSR|S_IWUSR)) < 0)

return 1;

sem.sem_num = 0;

sem.sem_op = 1;

sem.sem_flg = 0;

if (semop(id, &sem, 1) < 0)

return 1;

if (semctl(id, 0, IPC_RMID) < 0)

return 1;

return 0;

}

}end