1 files changed, 0 insertions, 71 deletions
diff --git a/services/surfaceflinger/DisplayIdGenerator.h b/services/surfaceflinger/DisplayIdGenerator.h
deleted file mode 100644
index 9791a2504a..0000000000
--- a/services/surfaceflinger/DisplayIdGenerator.h
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * Copyright 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <ui/DisplayId.h>
-
-#include <limits>
-#include <optional>
-#include <random>
-#include <unordered_set>
-
-#include <log/log.h>
-
-namespace android {
-
-// Generates pseudo-random IDs of type GpuVirtualDisplayId or HalVirtualDisplayId.
-template <typename Id>
-class DisplayIdGenerator {
-public:
-    explicit DisplayIdGenerator(size_t maxIdsCount = std::numeric_limits<size_t>::max())
-          : mMaxIdsCount(maxIdsCount) {}
-
-    bool inUse() const { return !mUsedIds.empty(); }
-
-    std::optional<Id> generateId() {
-        if (mUsedIds.size() >= mMaxIdsCount) {
-            return std::nullopt;
-        }
-
-        constexpr int kMaxAttempts = 1000;
-
-        for (int attempts = 0; attempts < kMaxAttempts; attempts++) {
-            const Id id{mDistribution(mGenerator)};
-            if (mUsedIds.count(id) == 0) {
-                mUsedIds.insert(id);
-                return id;
-            }
-        }
-
-        LOG_ALWAYS_FATAL("Couldn't generate ID after %d attempts", kMaxAttempts);
-    }
-
-    void releaseId(Id id) { mUsedIds.erase(id); }
-
-private:
-    const size_t mMaxIdsCount;
-
-    std::unordered_set<Id> mUsedIds;
-
-    // Pseudo-random with random seed, in contrast to physical display IDs, which are stable
-    // across reboots. The only ISurfaceComposer exposure for these IDs is a restricted API
-    // for screencap, so there is little benefit in making them unpredictable.
-    std::default_random_engine mGenerator{std::random_device()()};
-    std::uniform_int_distribution<typename Id::BaseId> mDistribution;
-};
-
-} // namespace android