bool sem_acquire_timeout_us(semaphore_t *sem, uint32_t timeout_us)
Acquire a permit from a semaphore, with timeout.
Definition sem.c:48
bool sem_try_acquire(semaphore_t *sem)
Attempt to acquire a permit from a semaphore without blocking.
Definition sem.c:70
bool sem_acquire_timeout_ms(semaphore_t *sem, uint32_t timeout_ms)
Acquire a permit from a semaphore, with timeout.
Definition sem.c:44
bool sem_acquire_block_until(semaphore_t *sem, absolute_time_t until)
Wait to acquire a permit from a semaphore until a specific time.
Definition sem.c:52
struct semaphore semaphore_t
A semaphore for controlling access to a shared resource.
void sem_init(semaphore_t *sem, int16_t initial_permits, int16_t max_permits)
Initialise a semaphore structure.
Definition sem.c:10
void sem_reset(semaphore_t *sem, int16_t permits)
Reset semaphore to a specific number of available permits.
Definition sem.c:97
int sem_available(semaphore_t *sem)
Return number of available permits on the semaphore.
Definition sem.c:17
bool sem_release(semaphore_t *sem)
Release a permit on a semaphore.
Definition sem.c:84
void sem_acquire_blocking(semaphore_t *sem)
Acquire a permit from the semaphore.
Definition sem.c:26
uint64_t absolute_time_t
An opaque 64 bit timestamp in microseconds.
Definition types.h:43
Core state shared by all lock primitives.
Definition lock_core.h:69
A semaphore for controlling access to a shared resource.
Definition sem.h:37
int16_t permits
Current number of available permits.
Definition sem.h:39
struct lock_core core
Core lock primitive used for blocking and signalling.
Definition sem.h:38
int16_t max_permits
Maximum number of permits allowed.
Definition sem.h:40
v2.3.1 (RP2350)