From aa21fd7a24c0a14dd98d3e97e033551ed3006eb4 Mon Sep 17 00:00:00 2001
From: Steven Le Rouzic <steven.lerouzic@gmail.com>
Date: Tue, 3 Jun 2025 00:13:17 +0200
Subject: WIP

---
 asl/handle_pool/index_pool.hpp       | 60 +++++++++++++++++++++++++++++++-----
 asl/handle_pool/index_pool_tests.cpp | 10 ++++++
 2 files changed, 63 insertions(+), 7 deletions(-)

(limited to 'asl')

diff --git a/asl/handle_pool/index_pool.hpp b/asl/handle_pool/index_pool.hpp
index 377f6f4..245ac24 100644
--- a/asl/handle_pool/index_pool.hpp
+++ b/asl/handle_pool/index_pool.hpp
@@ -10,6 +10,8 @@
 namespace asl
 {
 
+// @Todo Uniquely represented for the handle?
+
 template<
     int kIndexSize_,
     int kGenSize_,
@@ -43,19 +45,19 @@ template<
 requires (
     same_as<UserType, empty> || (kUserSize_ <= size_of<UserType> * 8 && trivially_copy_constructible<UserType>)
 )
-class index_pool_handle_base
+class index_pool_handle
 {
     static constexpr int kUserSizeComputed =
         same_as<UserType, empty> ? 0 : (kUserSize_ == 0 ? size_of<UserType> * 8 : kUserSize_); // NOLINT
 
 public:
-    using config = index_pool_config<kIndexSize_, kGenSize_, kUserSizeComputed>;
+    using config             = index_pool_config<kIndexSize_, kGenSize_, kUserSizeComputed>;
+    using user_type_external = UserType;
 
 private:
     using handle_type        = config::handle_type;
     using user_type          = config::user_type;
-    using user_type_external = UserType;
-    
+
     static constexpr handle_type kHasValueMask = ~(~handle_type{0} >> 1);
 
     static constexpr handle_type kIndexMask = (handle_type{1} << config::kIndexSize) - 1;
@@ -68,20 +70,64 @@ private:
                                         
     handle_type m_handle{};
 
+    [[nodiscard]] constexpr handle_type index(this index_pool_handle self)
+    {
+        return self.m_handle & kIndexMask;
+    }
+
+    [[nodiscard]] constexpr handle_type gen(this index_pool_handle self)
+    {
+        return (self.m_handle & kGenMask) >> kGenShift;
+    }
+
 public:
-    [[nodiscard]] constexpr bool has_value() const { return m_handle & kHasValueMask; }
+    index_pool_handle() = default;
 
-    [[nodiscard]] constexpr user_type_external user() const
+    [[nodiscard]] constexpr bool has_value(this index_pool_handle self)
+    {
+        return self.m_handle & kHasValueMask;
+    }
+
+    [[nodiscard]] constexpr user_type_external user(this index_pool_handle self)
         requires config::kHasUser
     {
         return bit_cast<user_type_external>(
-            static_cast<user_type>((m_handle & kUserMask) >> kUserShift)
+            static_cast<user_type>((self.m_handle & kUserMask) >> kUserShift)
         );
     }
+
+    constexpr bool operator==(this index_pool_handle self, index_pool_handle other)
+    {
+        return self.m_handle == other.m_handle;
+    }
 };
 
+template<
+    typename H,
+    typename Payload = empty,
+    allocator Allocator = DefaultAllocator>
 class IndexPool
 {
+    using config = H::config;
+
+    struct Slot
+    {
+        H handle;
+        ASL_NO_UNIQUE_ADDRESS Payload payload;
+    };
+
+    asl::chunked_buffer<Slot, 1024, Allocator> m_slots;
+
+public:
+    IndexPool() requires default_constructible<Allocator> = default;
+
+    explicit IndexPool(Allocator allocator) : m_slots{allocator} {}
+
+    H acquire() requires (!H::kHasUser)
+    {
+    }
+
+    H acquire(H::user_type_external
 };
 
 } // namespace asl
diff --git a/asl/handle_pool/index_pool_tests.cpp b/asl/handle_pool/index_pool_tests.cpp
index 1dd2816..50becfe 100644
--- a/asl/handle_pool/index_pool_tests.cpp
+++ b/asl/handle_pool/index_pool_tests.cpp
@@ -3,6 +3,16 @@
 // SPDX-License-Identifier: BSD-3-Clause
 
 #include "asl/testing/testing.hpp"
+#include "asl/handle_pool/index_pool.hpp"
+
+enum TestHandleType : uint8_t
+{
+    kType1,
+    kType2,
+};
+
+using TestHandle = asl::index_pool_handle<10, 14, TestHandleType>;
+using Pool = asl::IndexPool<TestHandle>;
 
 ASL_TEST(test)
 {
-- 
cgit