queueExample.m

// Queue初期化
Queue *queue = [[Queue alloc] initWithSize:128];

// NSDataをenqueue
NSData *indata = [[NSData alloc] init];
...
[queue enqueue:indata];

// すべてのNSDataをdequeue
while([queue count] > 0) {
    NSData *outdata = (NSData*)[queue dequeue];
    ...
}