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Implement zero-copy API for zwave_proxy (#10836)

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Co-authored-by: Keith Burzinski <kbx81x@gmail.com>
This commit is contained in:
J. Nick Koston
2025-09-23 20:12:54 +00:00
committed by GitHub
co-authored by Keith Burzinski
parent e9c2e211ef
commit 365e3afa9b
5 changed files with 15 additions and 14 deletions
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esphome/components/zwave_proxy/zwave_proxy.cpp
+5 -3
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@@ -106,14 +106,14 @@ void ZWaveProxy::process_uart_() {
}
ESP_LOGV(TAG, "Sending to client: %s", YESNO(this->api_connection_ != nullptr));
if (this->api_connection_ != nullptr) {
// minimize copying to reduce CPU overhead
// Zero-copy: point directly to our buffer
this->outgoing_proto_msg_.data = this->buffer_.data();
if (this->in_bootloader_) {
this->outgoing_proto_msg_.data_len = this->buffer_index_;
} else {
// If this is a data frame, use frame length indicator + 2 (for SoF + checksum), else assume 1 for ACK/NAK/CAN
this->outgoing_proto_msg_.data_len = this->buffer_[0] == ZWAVE_FRAME_TYPE_START ? this->buffer_[1] + 2 : 1;
}
std::memcpy(this->outgoing_proto_msg_.data, this->buffer_.data(), this->outgoing_proto_msg_.data_len);
this->api_connection_->send_message(this->outgoing_proto_msg_, api::ZWaveProxyFrame::MESSAGE_TYPE);
}
}
@@ -272,7 +272,9 @@ void ZWaveProxy::parse_start_(uint8_t byte) {
}
// Forward response (ACK/NAK/CAN) back to client for processing
if (this->api_connection_ != nullptr) {
this->outgoing_proto_msg_.data[0] = byte;
// Store single byte in buffer and point to it
this->buffer_[0] = byte;
this->outgoing_proto_msg_.data = this->buffer_.data();
this->outgoing_proto_msg_.data_len = 1;
this->api_connection_->send_message(this->outgoing_proto_msg_, api::ZWaveProxyFrame::MESSAGE_TYPE);
}