Squashed 'external/parallel-rdp/parallel-rdp-standalone/' content from commit 3f59f61f2c

git-subtree-dir: external/parallel-rdp/parallel-rdp-standalone
git-subtree-split: 3f59f61f2c1c56424356003041df5e4a10612049

parallel-rdp/command_ring.hpp

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+/* Copyright (c) 2020 Themaister
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <vector>
+
+#ifdef PARALLEL_RDP_SHADER_DIR
+#include "global_managers.hpp"
+#endif
+
+namespace RDP
+{
+class CommandProcessor;
+class CommandRing
+{
+public:
+	void init(
+#ifdef PARALLEL_RDP_SHADER_DIR
+			Granite::Global::GlobalManagersHandle global_handles,
+#endif
+			CommandProcessor *processor, unsigned count);
+	~CommandRing();
+	void drain();
+
+	void enqueue_command(unsigned num_words, const uint32_t *words);
+
+private:
+	CommandProcessor *processor = nullptr;
+	std::thread thr;
+	std::mutex lock;
+	std::condition_variable cond;
+
+	std::vector<uint32_t> ring;
+	uint64_t write_count = 0;
+	uint64_t read_count = 0;
+	uint64_t completed_count = 0;
+
+	void thread_loop();
+	void teardown_thread();
+#ifdef PARALLEL_RDP_SHADER_DIR
+	Granite::Global::GlobalManagersHandle global_handles;
+#endif
+};
+}