From 09e89c867c8dc14adee298176a0a4c72d8f32245 Mon Sep 17 00:00:00 2001
From: Vegard Storheil Eriksen <zyp@jvnv.net>
Date: Tue, 7 Aug 2012 16:54:36 +0200
Subject: Split out reusable parts into the laks project.

---
 os/pool.h | 146 --------------------------------------------------------------
 1 file changed, 146 deletions(-)
 delete mode 100644 os/pool.h

(limited to 'os/pool.h')

diff --git a/os/pool.h b/os/pool.h
deleted file mode 100644
index 1cb0a71..0000000
--- a/os/pool.h
+++ /dev/null
@@ -1,146 +0,0 @@
-#ifndef POOL_H
-#define POOL_H
-
-#include "stdint.h"
-
-template<class T>
-class BasePool {
-	public:
-		struct Element {
-			unsigned int use_count;
-			BasePool* pool;
-			
-			char data[sizeof(T)];
-		};
-		
-		virtual void free(Element* e) = 0;
-};
-
-template<class T>
-class P {
-	private:
-		typedef typename BasePool<T>::Element Element;
-		
-		Element* e;
-		
-		void inc() {
-			e->use_count++;
-		}
-		
-		void dec() {
-			e->use_count--;
-			if(!e->use_count) {
-				T* p = (T*)e->data;
-				p->~T();
-				e->pool->free(e);
-			}
-		}
-	
-	public:
-		P() : e(0) {}
-		
-		explicit P(Element* ep) : e(ep) {
-			inc();
-		}
-		
-		P(const P& p) : e(p.e) {
-			inc();
-		}
-		
-		~P() {
-			if(e) {
-				dec();
-			}
-		}
-		
-		void operator=(const P& p) {
-			if(e) {
-				dec();
-			}
-			
-			e = p.e;
-			
-			if(e) {
-				inc();
-			}
-		}
-		
-		void reset() {
-			if(e) {
-				dec();
-			}
-			
-			e = 0;
-		}
-		
-		T* operator->() {
-			return (T*)e->data;
-		}
-		
-		T* operator*() {
-			return (T*)e->data;
-		}
-		
-		operator bool() {
-			return bool(e);
-		}
-};
-
-template<class T, unsigned int size>
-class Pool : public BasePool<T> {
-	private:
-		typedef typename BasePool<T>::Element Element;
-		
-		union Node {
-			Element e;
-			Node* next;
-		};
-		
-		Node elements[size];
-		
-		Node* next_free;
-		
-		void free(Element* e) {
-			Node* n = (Node*)e;
-			
-			n->next = next_free;
-			next_free = n;
-		}
-		
-		Element* alloc() {
-			if(!next_free) {
-				return 0;
-			}
-			
-			Element* e = &next_free->e;
-			next_free = next_free->next;
-			
-			e->use_count = 0;
-			e->pool = this;
-			
-			return e;
-		}
-	
-	public:
-		Pool() : next_free(0) {
-			for(unsigned int i = 0; i < size; i++) {
-				free(&elements[i].e);
-			}
-		}
-		
-		P<T> create() {
-			Element* e = alloc();
-			
-			if(!e) {
-				return P<T>();
-			}
-			
-			new (e->data) T;
-			
-			return P<T>(e);
-		}
-};
-
-void* operator new(unsigned int, char* buf);
-
-#endif
-- 
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