from panda3d.core import Semaphore
A classic semaphore synchronization primitive.
A semaphore manages an internal counter which is decremented by each
acquire()call and incremented by each
release()call. The counter can never go below zero; when
acquire()finds that it is zero, it blocks, waiting until some other thread calls
acquire() → None¶
Decrements the internal count. If the count was already at zero, blocks until the count is nonzero, then decrements it.
getCount() → int¶
Returns the current semaphore count. Note that this call is not thread- safe (the count may change at any time).
release() → int¶
Increments the semaphore’s internal count. This may wake up another thread blocked on
Returns the count of the semaphore upon release.