Semaphores
Counting semaphores are available as an alternative primitive for managing threads within device drivers. See semaphore(9F) for more information.
Table 3-3 Semaphores|
Name |
Description |
|---|---|
|
sema_init(9F) |
Initialize a semaphore |
|
sema_destroy(9F) |
Destroys a semaphore |
|
sema_p(9F) |
Decrement semaphore and possibly block |
|
sema_tryp(9F) |
Attempt to decrement semaphore, but do not block |
|
sema_p_sig(9F) |
Decrement semaphore, but do not block if signal is pending |
|
sema_v(9F) |
Increment semaphore and possibly unblock waiter |
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