v2.0.0
Data Structures | Typedefs | Functions
sem.h File Reference
`#include "pico/lock_core.h"`
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## Data Structures
struct | semaphore

## Typedefs
typedef struct semaphore | semaphore_t

## Functions
void | sem_init (semaphore_t *sem, int16_t initial_permits, int16_t max_permits)
| Initialise a semaphore structure. More...
int | sem_available (semaphore_t *sem)
| Return number of available permits on the semaphore. More...
bool | sem_release (semaphore_t *sem)
| Release a permit on a semaphore. More...
void | sem_reset (semaphore_t *sem, int16_t permits)
| Reset semaphore to a specific number of available permits. More...
void | sem_acquire_blocking (semaphore_t *sem)
| Acquire a permit from the semaphore. More...
bool | sem_acquire_timeout_ms (semaphore_t *sem, uint32_t timeout_ms)
| Acquire a permit from a semaphore, with timeout. More...
bool | sem_acquire_timeout_us (semaphore_t *sem, uint32_t timeout_us)
| Acquire a permit from a semaphore, with timeout. More...
bool | sem_acquire_block_until (semaphore_t *sem, absolute_time_t until)
| Wait to acquire a permit from a semaphore until a specific time. More...
bool | sem_try_acquire (semaphore_t *sem)
| Attempt to acquire a permit from a semaphore without blocking. More...