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Implement packetcache.GetLast.
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2 changed files with 19 additions and 0 deletions
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@ -135,6 +135,21 @@ func (cache *Cache) Get(seqno uint16, result []byte) uint16 {
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return 0
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}
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func (cache *Cache) GetLast(result []byte) uint16 {
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cache.mu.Lock()
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defer cache.mu.Unlock()
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i := cache.tail - 1
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if i >= uint16(len(cache.entries)) {
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i = 0
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}
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return uint16(copy(
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result[:cache.entries[i].length],
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cache.entries[i].buf[:]),
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)
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}
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func (cache *Cache) GetAt(seqno uint16, index uint16, result []byte) uint16 {
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cache.mu.Lock()
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defer cache.mu.Unlock()
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@ -33,6 +33,10 @@ func TestCache(t *testing.T) {
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if !bytes.Equal(buf[:l], buf1) {
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t.Errorf("Couldn't get 13 at %v", i1)
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}
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l = cache.GetLast(buf)
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if !bytes.Equal(buf[:l], buf2) {
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t.Errorf("Couldn't get last")
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}
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l = cache.Get(17, buf)
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if !bytes.Equal(buf[:l], buf2) {
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