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blockingqueue.hpp: Fix sem_wait not blocking if task is signaled 

sem_wait() can be interrupted if the task receives a signal, however
the blockinglist implementation depends on blocking until the semaphore
can be obtained.
This commit is contained in:
Ville Juven 2023-08-10 11:57:56 +03:00 committed by Beat Küng
parent c0084ab24d
commit 0cae33bf47
1 changed files with 2 additions and 2 deletions
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4
src/include/containers/BlockingQueue.hpp
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@ -56,7 +56,7 @@ public:
void push(T newItem)
{
px4_sem_wait(&_sem_head);
do {} while (px4_sem_wait(&_sem_head) != 0);
_data[_tail] = newItem;
_tail = (_tail + 1) % N;
@ -66,7 +66,7 @@ public:
T pop()
{
px4_sem_wait(&_sem_tail);
do {} while (px4_sem_wait(&_sem_tail) != 0);
T ret = _data[_head];
_head = (_head + 1) % N;