int tup_lock_init(void)
{
sh_lock = openat(tup_top_fd(), TUP_SHARED_LOCK, O_RDWR);
if(sh_lock < 0) {
perror(TUP_SHARED_LOCK);
return -1;
}
if(tup_flock(sh_lock) < 0) {
return -1;
}
obj_lock = openat(tup_top_fd(), TUP_OBJECT_LOCK, O_RDWR);
if(obj_lock < 0) {
perror(TUP_OBJECT_LOCK);
return -1;
}
if(tup_flock(obj_lock) < 0) {
return -1;
}
tri_lock = openat(tup_top_fd(), TUP_TRI_LOCK, O_RDWR);
if(tri_lock < 0) {
perror(TUP_TRI_LOCK);
return -1;
}
return 0;
}
void tup_lock_exit(void)
{
tup_unflock(obj_lock);
close(obj_lock);
/* Wait for the monitor to pick up the object lock */
tup_flock(tri_lock);
tup_unflock(tri_lock);
close(tri_lock);
tup_unflock(sh_lock);
close(sh_lock);
}
int tup_lock_init(void)
{
int ret;
if(tup_lock_open(TUP_SHARED_LOCK, &sh_lock) < 0)
return -1;
ret = tup_try_flock(sh_lock);
if(ret > 0) {
printf("Waiting for another tup process (or an autoupdate) to finish...\n");
ret = tup_flock(sh_lock);
}
if(ret < 0) {
return -1;
}
if(tup_lock_open(TUP_OBJECT_LOCK, &obj_lock) < 0)
return -1;
if(tup_flock(obj_lock) < 0)
return -1;
if(tup_lock_open(TUP_TRI_LOCK, &tri_lock) < 0)
return -1;
return 0;
}
