Functions
err_t	sys_sem_new (sys_sem_t *sem, u8_t count)
	Create a new semaphore.
void	sys_sem_signal (sys_sem_t *sem)
	Signals a semaphore.
u32_t	sys_arch_sem_wait (sys_sem_t *sem, u32_t timeout)
	Wait for a semaphore for the specified timeout.
void	sys_sem_free (sys_sem_t *sem)
	Delete a semaphore.
int	sys_sem_valid (sys_sem_t *sem)
	Check if a semaphore is valid/allocated: return 1 for valid, 0 for invalid.
void	sys_sem_set_invalid (sys_sem_t *sem)
	Set a semaphore invalid so that sys_sem_valid returns 0.

Function Documentation

Wait for a semaphore for the specified timeout.

Parameters:

sem	the semaphore to wait for
timeout	timeout in milliseconds to wait (0 = wait forever)

Returns:: time (in milliseconds) waited for the semaphore or SYS_ARCH_TIMEOUT on timeout

Definition at line 294 of file lwip_sys_arch.c.

void sys_sem_free ( sys_sem_t * sem )

Delete a semaphore.

Parameters:

sem	semaphore to delete

Definition at line 324 of file lwip_sys_arch.c.

Create a new semaphore.

Parameters:

sem	pointer to the semaphore to create
count	initial count of the semaphore

Definition at line 259 of file lwip_sys_arch.c.

void sys_sem_set_invalid ( sys_sem_t * sem )

Set a semaphore invalid so that sys_sem_valid returns 0.

void sys_sem_signal ( sys_sem_t * sem )

Signals a semaphore.

Parameters:

sem	the semaphore to signal

Definition at line 311 of file lwip_sys_arch.c.

int sys_sem_valid ( sys_sem_t * sem )

Check if a semaphore is valid/allocated: return 1 for valid, 0 for invalid.

Semaphores
[OS abstraction layer]