From bdc01254a9b3ce8359f8f007c2102cb2d112418e Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Fri, 4 Aug 2023 03:31:52 +0200
Subject: Query Cache: Setup Base rework

---
 src/video_core/query_cache/query_stream.h | 125 ++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 src/video_core/query_cache/query_stream.h

(limited to 'src/video_core/query_cache/query_stream.h')

diff --git a/src/video_core/query_cache/query_stream.h b/src/video_core/query_cache/query_stream.h
new file mode 100644
index 000000000..dd5f95b3c
--- /dev/null
+++ b/src/video_core/query_cache/query_stream.h
@@ -0,0 +1,125 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <deque>
+#include <optional>
+#include <vector>
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/query_cache/bank_base.h"
+#include "video_core/query_cache/query_base.h"
+
+namespace VideoCommon {
+
+class StreamerInterface {
+public:
+    StreamerInterface(size_t id_, u64 dependance_mask_ = 0) : id{id_}, dependance_mask{dependance_mask_} {}
+    virtual ~StreamerInterface() = default;
+
+    virtual QueryBase* GetQuery(size_t id) = 0;
+
+    virtual void StartCounter() {
+        /* Do Nothing */
+    }
+
+    virtual void PauseCounter() {
+        /* Do Nothing */
+    }
+
+    virtual void ResetCounter() {
+        /* Do Nothing */
+    }
+
+    virtual void CloseCounter() {
+        /* Do Nothing */
+    }
+
+    virtual bool HasPendingSync() {
+        return false;
+    }
+
+    virtual void PresyncWrites() {
+        /* Do Nothing */
+    }
+
+    virtual void SyncWrites() {
+        /* Do Nothing */
+    }
+
+    virtual size_t WriteCounter(VAddr address, bool has_timestamp, u32 value,
+                                std::optional<u32> subreport = std::nullopt) = 0;
+
+    virtual bool HasUnsyncedQueries() {
+        return false;
+    }
+
+    virtual void PushUnsyncedQueries() {
+        /* Do Nothing */
+    }
+
+    virtual void PopUnsyncedQueries() {
+        /* Do Nothing */
+    }
+
+    virtual void Free(size_t query_id) = 0;
+
+    size_t GetId() const {
+        return id;
+    }
+
+protected:
+    const size_t id;
+    const u64 dependance_mask;
+};
+
+template <typename QueryType>
+class SimpleStreamer : public StreamerInterface {
+public:
+    SimpleStreamer(size_t id_) : StreamerInterface{id_} {}
+    virtual ~SimpleStreamer() = default;
+
+protected:
+    virtual QueryType* GetQuery(size_t query_id) override {
+        if (query_id < slot_queries.size()) {
+            return &slot_queries[query_id];
+        }
+        return nullptr;
+    }
+
+    virtual void Free(size_t query_id) override {
+        std::scoped_lock lk(guard);
+        ReleaseQuery(query_id);
+    }
+
+    template <typename... Args, typename = decltype(QueryType(std::declval<Args>()...))>
+    size_t BuildQuery(Args&&... args) {
+        std::scoped_lock lk(guard);
+        if (!old_queries.empty()) {
+            size_t new_id = old_queries.front();
+            old_queries.pop_front();
+            new (&slot_queries[new_id]) QueryType(std::forward<Args>(args)...);
+            return new_id;
+        }
+        size_t new_id = slot_queries.size();
+        slot_queries.emplace_back(std::forward<Args>(args)...);
+        return new_id;
+    }
+
+    void ReleaseQuery(size_t query_id) {
+
+        if (query_id < slot_queries.size()) {
+            old_queries.push_back(query_id);
+            return;
+        }
+        UNREACHABLE();
+    }
+
+    std::mutex guard;
+    std::deque<QueryType> slot_queries;
+    std::deque<size_t> old_queries;
+};
+
+} // namespace VideoCommon
\ No newline at end of file
-- 
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