diff options
Diffstat (limited to 'src/uapi/proc.c')
| -rw-r--r-- | src/uapi/proc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/uapi/proc.c b/src/uapi/proc.c index e87a2ec..bb4b463 100644 --- a/src/uapi/proc.c +++ b/src/uapi/proc.c @@ -181,6 +181,9 @@ SYSCALL_DEFINE1(swap)(struct tcb *t, sys_arg_t tid){ if (!s) return_args1(t, ERR_INVAL); + if (running(s)) + return_args1(t, ERR_EXT); + /* switch over to new thread */ use_tcb(s); @@ -195,6 +198,9 @@ SYSCALL_DEFINE1(swap)(struct tcb *t, sys_arg_t tid){ if (s->notify_state == NOTIFY_QUEUED) notify(s, 0); + /* if an irq handler is directly swapping to some other thread, + * interpret it as the thread being finished with its critical section */ + enable_irqs(); /* get register state for new thread */ return_args(s, get_args(s)); } |