Design

source/ecs/entity_allocator.d

@@ -0,0 +1,51 @@
+module ecs.entity_allocator;
+
+enum bucketSize = 4096;
+enum bucketsInAllocation = 128;
+
+struct Bucket
+{
+    union
+    {
+        ubyte[bucketSize] memory;
+        Bucket* next;
+    }
+
+}
+
+struct BucketArray
+{
+    Bucket[bucketsInAllocation] buckets;
+}
+
+struct EntityAllocator
+{
+    BucketArray[] arrays;
+    Bucket* lastEmptyBucket;
+
+    void initBucketArray(ref BucketArray bArr)
+    {
+
+    }
+
+    void allocateBucketArray()
+    {
+        auto bucketArray = new BucketArray();
+        assert(bucketArray.buckets[0].ptr % bucketSize == 0) arrays ~= bucketArray;
+        Bucket* lasBucket = initBucketArray(bucketArray);
+        lastEmptyBucket = lasBucket;
+    }
+
+    ubyte[] getMemory()
+    {
+        if (lastEmptyBucket is null)
+        {
+            allocateBucket();
+        }
+        auto bucketTmp = lastEmptyBucket;
+        lastEmptyBucket = bucketTmp.next;
+
+        return bucketTmp.memory[];
+    }
+
+}