From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 third_party/rlbox/include/rlbox_app_pointer.hpp | 93 +++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 third_party/rlbox/include/rlbox_app_pointer.hpp

(limited to 'third_party/rlbox/include/rlbox_app_pointer.hpp')

diff --git a/third_party/rlbox/include/rlbox_app_pointer.hpp b/third_party/rlbox/include/rlbox_app_pointer.hpp
new file mode 100644
index 0000000000..5af4876867
--- /dev/null
+++ b/third_party/rlbox/include/rlbox_app_pointer.hpp
@@ -0,0 +1,93 @@
+#pragma once
+// IWYU pragma: private, include "rlbox.hpp"
+// IWYU pragma: friend "rlbox_.*\.hpp"
+
+#include <map>
+#ifndef RLBOX_USE_CUSTOM_SHARED_LOCK
+#  include <shared_mutex>
+#endif
+#include <type_traits>
+
+#include "rlbox_helpers.hpp"
+#include "rlbox_type_traits.hpp"
+#include "rlbox_types.hpp"
+
+namespace rlbox {
+
+template<typename T_PointerType>
+class app_pointer_map
+{
+
+private:
+  using T_PointerTypeUnsigned = detail::unsigned_int_of_size_t<T_PointerType>;
+
+  std::map<T_PointerTypeUnsigned, void*> pointer_map;
+  T_PointerTypeUnsigned counter = 1;
+#ifndef RLBOX_SINGLE_THREADED_INVOCATIONS
+  RLBOX_SHARED_LOCK(map_mutex);
+#endif
+
+  T_PointerType get_unused_index(T_PointerType max_ptr_val)
+  {
+    const auto max_val = (T_PointerTypeUnsigned)max_ptr_val;
+    for (T_PointerTypeUnsigned i = counter; i <= max_val; i++) {
+      if (pointer_map.find(i) == pointer_map.end()) {
+        counter = i + 1;
+        return (T_PointerType)i;
+      }
+    }
+    for (T_PointerTypeUnsigned i = 1; i < counter; i++) {
+      if (pointer_map.find(i) == pointer_map.end()) {
+        counter = i + 1;
+        return (T_PointerType)i;
+      }
+    }
+    detail::dynamic_check(false, "Could not find free app pointer slot");
+    return 0;
+  }
+
+public:
+  app_pointer_map()
+  {
+    // ensure we can't use app pointer 0 as this is sometimes confused as null
+    // by the sandbox
+    pointer_map[0] = nullptr;
+  }
+
+  T_PointerType get_app_pointer_idx(void* ptr, T_PointerType max_ptr_val)
+  {
+#ifndef RLBOX_SINGLE_THREADED_INVOCATIONS
+    RLBOX_ACQUIRE_UNIQUE_GUARD(lock, map_mutex);
+#endif
+    T_PointerType idx = get_unused_index(max_ptr_val);
+    T_PointerTypeUnsigned idx_int = (T_PointerTypeUnsigned)idx;
+    pointer_map[idx_int] = ptr;
+    return idx;
+  }
+
+  void remove_app_ptr(T_PointerType idx)
+  {
+#ifndef RLBOX_SINGLE_THREADED_INVOCATIONS
+    RLBOX_ACQUIRE_UNIQUE_GUARD(lock, map_mutex);
+#endif
+    T_PointerTypeUnsigned idx_int = (T_PointerTypeUnsigned)idx;
+    auto it = pointer_map.find(idx_int);
+    detail::dynamic_check(it != pointer_map.end(),
+                          "Error: removing a non-existing app pointer");
+    pointer_map.erase(it);
+  }
+
+  void* lookup_index(T_PointerType idx)
+  {
+#ifndef RLBOX_SINGLE_THREADED_INVOCATIONS
+    RLBOX_ACQUIRE_SHARED_GUARD(lock, map_mutex);
+#endif
+    T_PointerTypeUnsigned idx_int = (T_PointerTypeUnsigned)idx;
+    auto it = pointer_map.find(idx_int);
+    detail::dynamic_check(it != pointer_map.end(),
+                          "Error: looking up a non-existing app pointer");
+    return it->second;
+  }
+};
+
+}
\ No newline at end of file
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