static void initbyuserid(const char *filename, const char *mode, int locktype,
const char userid[USERID_MAXLEN], int access,
FILE **file_r, int *initial_r, int *n_r) {
FILE *file;
int n,i;
struct stat ustab;
u32 hash;
file= fopen(filename,mode);
if (!file) ohshite("User database file `%s' inaccessible",filename);
makelock(file,locktype,filename);
if (fstat(fileno(file),&ustab)) ohshite("User database `%s' unstattable",filename);
if (ustab.st_size % sizeof(struct userentry))
ohshit("User database `%s' corrupt",filename);
n= ustab.st_size / sizeof(struct userentry);
if (n==0) ohshit("User database `%s' truncated",filename);
hash= userdb_hash(userid);
i= hash % n;
if (fseek(file, i*sizeof(struct userentry), SEEK_SET))
ohshite("User database `%s' unseekable",filename);
*file_r= file;
*initial_r= i;
*n_r= n;
}
int main(void){
int total = 0;
init_table();
for(int i = 0; i < 3; i++){
lock_t *l = (lock_t *) surely_malloc(sizeof(lock_t));
thread_locks[i] = l;
results[i] = (int *) surely_malloc (sizeof(int));
makelock((void *)l);
}
for(int i = 0; i < 3; i++){
int *t = (int *) surely_malloc(sizeof(int));
*t = i;
spawn((void *)&f, (void *)t);
}
for(int i = 0; i < 3; i++){
lock_t *l = thread_locks[i];
acquire(l);
freelock2(l);
free(l);
int *r = results[i];
int i = *r;
free(r);
total += i;
}
//total should be equal to 3
}
