func boundedBufferSemaphore() {
const bufferSize int = 20
n := 100
const producerSpeed int = 1
const consumerSpeed int = 1 // 10
in := 0
out := 0
var buffer [bufferSize]int
mutex := semaphore.New(1)
empty := semaphore.New(bufferSize)
full := semaphore.New(bufferSize)
// full.AcquireMany(bufferSize) // Initialized to zero.
full.DrainPermits()
wg := new(sync.WaitGroup)
wg.Add(1)
go func() {
for i := 0; i < n; i++ {
empty.Acquire()
mutex.Acquire()
buffer[in] = i
in = (in + 1) % bufferSize
fmt.Printf("Produced %d\n", i)
mutex.Release()
full.Release()
time.Sleep(time.Duration(producerSpeed) * time.Millisecond)
}
wg.Done()
}()
wg.Add(1)
go func() {
for i := 0; i < n; i++ {
full.Acquire()
mutex.Acquire()
// Consume buffer[out]
out = (out + 1) % bufferSize
fmt.Printf("Consumed %d\n", i)
mutex.Release()
empty.Release()
time.Sleep(time.Duration(consumerSpeed) * time.Millisecond)
}
wg.Done()
}()
wg.Wait()
}
func NewMITIE(filepath string) *MITIE {
ner := C.mitie_load_named_entity_extractor(C.CString(filepath))
sem := semaphore.New(4)
return &MITIE{
ner: ner,
sem: sem,
}
}