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Code comments for how the receieve queue works
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@ -226,6 +226,11 @@ export default class Websock {
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return new Uint8Array(this._sQ.buffer, 0, this._sQlen);
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return new Uint8Array(this._sQ.buffer, 0, this._sQlen);
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}
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}
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// We want to move all the unread data to the start of the queue,
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// e.g. compacting.
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// The function also expands the receive que if needed, and for
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// performance reasons we combine these two actions to avoid
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// unneccessary copying.
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_expand_compact_rQ(min_fit) {
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_expand_compact_rQ(min_fit) {
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// if we're using less than 1/8th of the buffer even with the incoming bytes, compact in place
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// if we're using less than 1/8th of the buffer even with the incoming bytes, compact in place
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// instead of resizing
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// instead of resizing
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@ -262,8 +267,8 @@ export default class Websock {
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this._rQi = 0;
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this._rQi = 0;
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}
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}
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// push arraybuffer values onto the end of the receive que
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_decode_message(data) {
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_decode_message(data) {
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// push arraybuffer values onto the end
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const u8 = new Uint8Array(data);
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const u8 = new Uint8Array(data);
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if (u8.length > this._rQbufferSize - this._rQlen) {
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if (u8.length > this._rQbufferSize - this._rQlen) {
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this._expand_compact_rQ(u8.length);
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this._expand_compact_rQ(u8.length);
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@ -276,8 +281,9 @@ export default class Websock {
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this._decode_message(e.data);
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this._decode_message(e.data);
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if (this.rQlen > 0) {
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if (this.rQlen > 0) {
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this._eventHandlers.message();
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this._eventHandlers.message();
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// Compact the receive queue
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if (this._rQlen == this._rQi) {
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if (this._rQlen == this._rQi) {
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// All data has now been processed, this means we
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// can reset the receive queue.
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this._rQlen = 0;
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this._rQlen = 0;
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this._rQi = 0;
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this._rQi = 0;
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}
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}
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