10 void sem_init(semaphore_t *sem, int16_t initial_permits, int16_t max_permits) {  in sem_init()  argument
11     lock_init(&sem->core, next_striped_spin_lock_num());  in sem_init()
12     sem->permits = initial_permits;  in sem_init()
13     sem->max_permits = max_permits;  in sem_init()
17 int __time_critical_func(sem_available)(semaphore_t *sem) {  in __time_critical_func()
19     return *(volatile typeof(sem->permits) *) &sem->permits;  in __time_critical_func()
21     static_assert(sizeof(sem->permits) == 2, "");  in __time_critical_func()
22     return *(volatile int16_t *) &sem->permits;  in __time_critical_func()
26 void __time_critical_func(sem_acquire_blocking)(semaphore_t *sem) {  in __time_critical_func()
28         uint32_t save = spin_lock_blocking(sem->core.spin_lock);  in __time_critical_func()
29         if (sem->permits > 0) {  in __time_critical_func()
30             sem->permits--;  in __time_critical_func()
31             spin_unlock(sem->core.spin_lock, save);  in __time_critical_func()
34         lock_internal_spin_unlock_with_wait(&sem->core, save);  in __time_critical_func()
38 bool __time_critical_func(sem_acquire_timeout_ms)(semaphore_t *sem, uint32_t timeout_ms) {  in __time_critical_func()
39     return sem_acquire_block_until(sem, make_timeout_time_ms(timeout_ms));  in __time_critical_func()
42 bool __time_critical_func(sem_acquire_timeout_us)(semaphore_t *sem, uint32_t timeout_us) {  in __time_critical_func()
43     return sem_acquire_block_until(sem, make_timeout_time_us(timeout_us));  in __time_critical_func()
46 bool __time_critical_func(sem_acquire_block_until)(semaphore_t *sem, absolute_time_t until) {  in __time_critical_func()
48         uint32_t save = spin_lock_blocking(sem->core.spin_lock);  in __time_critical_func()
49         if (sem->permits > 0) {  in __time_critical_func()
50             sem->permits--;  in __time_critical_func()
51             spin_unlock(sem->core.spin_lock, save);  in __time_critical_func()
54         if (lock_internal_spin_unlock_with_best_effort_wait_or_timeout(&sem->core, save, until)) {  in __time_critical_func()
60 bool __time_critical_func(sem_try_acquire)(semaphore_t *sem) {  in __time_critical_func()
61     uint32_t save = spin_lock_blocking(sem->core.spin_lock);  in __time_critical_func()
62     if (sem->permits > 0) {  in __time_critical_func()
63         sem->permits--;  in __time_critical_func()
64         spin_unlock(sem->core.spin_lock, save);  in __time_critical_func()
67     spin_unlock(sem->core.spin_lock, save);  in __time_critical_func()
72 bool __time_critical_func(sem_release)(semaphore_t *sem) {  in __time_critical_func()
73     uint32_t save = spin_lock_blocking(sem->core.spin_lock);  in __time_critical_func()
74     int32_t count = sem->permits;  in __time_critical_func()
75     if (count < sem->max_permits) {  in __time_critical_func()
76         sem->permits = (int16_t)(count + 1);  in __time_critical_func()
77         lock_internal_spin_unlock_with_notify(&sem->core, save);  in __time_critical_func()
80         spin_unlock(sem->core.spin_lock, save);  in __time_critical_func()
85 void __time_critical_func(sem_reset)(semaphore_t *sem, int16_t permits) {  in __time_critical_func()
86     assert(permits >= 0 && permits <= sem->max_permits);  in __time_critical_func()
87     uint32_t save = spin_lock_blocking(sem->core.spin_lock);  in __time_critical_func()
88     if (permits > sem->permits) {  in __time_critical_func()
89         sem->permits = permits;  in __time_critical_func()
90         lock_internal_spin_unlock_with_notify(&sem->core, save);  in __time_critical_func()
92         sem->permits = permits;  in __time_critical_func()
93         spin_unlock(sem->core.spin_lock, save);  in __time_critical_func()