-added EntityBlocks allocating in blocks (no memory freeing, currently block contain 128 EntityBlocks)

source/ecs/entity_allocator.d

@@ -1,58 +1,29 @@
 module ecs.entity_allocator;
 
-enum bucketSize = 4096;
-enum bucketsInAllocation = 128;
+import ecs.manager;
 
-struct Bucket
-{
-    union
-    {
-        ubyte[bucketSize] memory;
-        Bucket* next;
-    }
-
-}
-
-struct BucketArray
-{
-    Bucket[bucketsInAllocation] buckets;
-}
+import std.experimental.allocator.mallocator : Mallocator, AlignedMallocator;
+import std.experimental.allocator;
 
 struct EntityAllocator
 {
-    BucketArray[] arrays;
-    Bucket* lastEmptyBucket;
+    void* next_block;
 
-    Bucket* initBucketArray(ref BucketArray bArr)
+    void* getBlock()
     {
-        return null;
+        if(next_block is null)allocBlock();
+        void* ret = next_block;
+        next_block = *cast(void**)next_block;
+        return ret;
     }
 
-    void allocateBucketArray()
+    private void allocBlock()
     {
-        //auto bucketArray = new BucketArray();
-        BucketArray bucketArray;
-        assert(cast(uint)bucketArray.buckets[0].memory.ptr % bucketSize == 0);
-        arrays ~= bucketArray;
-        Bucket* lasBucket = initBucketArray(bucketArray);
-        lastEmptyBucket = lasBucket;
-    }
-
-    void allocateBucket()
-    {
-        
-    }
-
-    ubyte[] getMemory()
-    {
-        if (lastEmptyBucket is null)
+        next_block = cast(void*)AlignedMallocator.instance.alignedAllocate(EntityManager.page_size * EntityManager.pages_in_block, EntityManager.page_size);
+        foreach(i;0..EntityManager.pages_in_block-1)
         {
-            allocateBucket();
+            void** pointer = cast(void**)(next_block + i * EntityManager.page_size);
+            *pointer = next_block + (i+1) * EntityManager.page_size;
         }
-        auto bucketTmp = lastEmptyBucket;
-        lastEmptyBucket = bucketTmp.next;
-
-        return bucketTmp.memory[];
     }
-
 }