0be6d925dc
Which means that reduz' beloved style which we all became used to will now be changed automatically to remove the first empty line. This makes us lean closer to 1TBS (the one true brace style) instead of hybridating it with some Allman-inspired spacing. There's still the case of braces around single-statement blocks that needs to be addressed (but clang-format can't help with that, but clang-tidy may if we agree about it). Part of #33027.
122 lines
4.2 KiB
C++
122 lines
4.2 KiB
C++
/*************************************************************************/
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/* packet_buffer.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef PACKET_BUFFER_H
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#define PACKET_BUFFER_H
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#include "core/os/copymem.h"
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#include "core/ring_buffer.h"
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template <class T>
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class PacketBuffer {
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private:
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typedef struct {
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uint32_t size;
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T info;
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} _Packet;
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RingBuffer<_Packet> _packets;
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RingBuffer<uint8_t> _payload;
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public:
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Error write_packet(const uint8_t *p_payload, uint32_t p_size, const T *p_info) {
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#ifdef TOOLS_ENABLED
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// Verbose buffer warnings
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if (p_payload && _payload.space_left() < (int32_t)p_size) {
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ERR_PRINT("Buffer payload full! Dropping data.");
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ERR_FAIL_V(ERR_OUT_OF_MEMORY);
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}
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if (p_info && _packets.space_left() < 1) {
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ERR_PRINT("Too many packets in queue! Dropping data.");
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ERR_FAIL_V(ERR_OUT_OF_MEMORY);
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}
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#else
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ERR_FAIL_COND_V(p_payload && (uint32_t)_payload.space_left() < p_size, ERR_OUT_OF_MEMORY);
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ERR_FAIL_COND_V(p_info && _packets.space_left() < 1, ERR_OUT_OF_MEMORY);
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#endif
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// If p_info is nullptr, only the payload is written
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if (p_info) {
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_Packet p;
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p.size = p_size;
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copymem(&p.info, p_info, sizeof(T));
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_packets.write(p);
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}
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// If p_payload is nullptr, only the packet information is written.
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if (p_payload) {
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_payload.write((const uint8_t *)p_payload, p_size);
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}
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return OK;
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}
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Error read_packet(uint8_t *r_payload, int p_bytes, T *r_info, int &r_read) {
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ERR_FAIL_COND_V(_packets.data_left() < 1, ERR_UNAVAILABLE);
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_Packet p;
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_packets.read(&p, 1);
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ERR_FAIL_COND_V(_payload.data_left() < (int)p.size, ERR_BUG);
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ERR_FAIL_COND_V(p_bytes < (int)p.size, ERR_OUT_OF_MEMORY);
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r_read = p.size;
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copymem(r_info, &p.info, sizeof(T));
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_payload.read(r_payload, p.size);
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return OK;
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}
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void discard_payload(int p_size) {
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_packets.decrease_write(p_size);
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}
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void resize(int p_pkt_shift, int p_buf_shift) {
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_packets.resize(p_pkt_shift);
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_payload.resize(p_buf_shift);
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}
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int packets_left() const {
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return _packets.data_left();
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}
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void clear() {
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_payload.resize(0);
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_packets.resize(0);
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}
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PacketBuffer() {
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clear();
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}
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~PacketBuffer() {
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clear();
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}
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};
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#endif // PACKET_BUFFER_H
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