TUN-5261: Collect QUIC metrics about RTT, packets and bytes transfered and log events at tracing level

vendor/github.com/francoispqt/gojay/decode_stream_pool.go

@@ -0,0 +1,59 @@
+package gojay
+
+import (
+	"io"
+	"sync"
+)
+
+var streamDecPool = sync.Pool{
+	New: newStreamDecoderPool,
+}
+
+// NewDecoder returns a new StreamDecoder.
+// It takes an io.Reader implementation as data input.
+// It initiates the done channel returned by Done().
+func (s stream) NewDecoder(r io.Reader) *StreamDecoder {
+	dec := NewDecoder(r)
+	streamDec := &StreamDecoder{
+		Decoder: dec,
+		done:    make(chan struct{}, 1),
+		mux:     sync.RWMutex{},
+	}
+	return streamDec
+}
+func newStreamDecoderPool() interface{} {
+	return Stream.NewDecoder(nil)
+}
+
+// BorrowDecoder borrows a StreamDecoder from the pool.
+// It takes an io.Reader implementation as data input.
+// It initiates the done channel returned by Done().
+//
+// If no StreamEncoder is available in the pool, it returns a fresh one
+func (s stream) BorrowDecoder(r io.Reader) *StreamDecoder {
+	return s.borrowDecoder(r, 512)
+}
+
+func (s stream) borrowDecoder(r io.Reader, bufSize int) *StreamDecoder {
+	streamDec := streamDecPool.Get().(*StreamDecoder)
+	streamDec.called = 0
+	streamDec.keysDone = 0
+	streamDec.cursor = 0
+	streamDec.err = nil
+	streamDec.r = r
+	streamDec.length = 0
+	streamDec.isPooled = 0
+	streamDec.done = make(chan struct{}, 1)
+	if bufSize > 0 {
+		streamDec.data = make([]byte, bufSize)
+	}
+	return streamDec
+}
+
+// Release sends back a Decoder to the pool.
+// If a decoder is used after calling Release
+// a panic will be raised with an InvalidUsagePooledDecoderError error.
+func (dec *StreamDecoder) Release() {
+	dec.isPooled = 1
+	streamDecPool.Put(dec)
+}