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changed chain_to_semaphore() to be more fault resistent

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hyunghwan.chung
2019-08-24 16:03:17 +00:00
parent c8e22fbd92
commit 87cf4f4b6a
2 changed files with 3 additions and 1 deletions
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moo/lib/exec.c
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@ -537,6 +537,8 @@ static MOO_INLINE void chain_into_semaphore (moo_t* moo, moo_oop_process_t proc,
/* a process chained to a semaphore cannot get chained to
* a semaphore again. a process can get chained to a single semaphore
* or a single semaphore group only */
if ((moo_oop_t)proc->sem != moo->_nil) return; /* ignore it if it happens anyway. TODO: is it desirable???? */
MOO_ASSERT (moo, (moo_oop_t)proc->sem == moo->_nil);
MOO_ASSERT (moo, (moo_oop_t)proc->sem_wait.prev == moo->_nil);
MOO_ASSERT (moo, (moo_oop_t)proc->sem_wait.next == moo->_nil);