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CryScriptSystem/RecycleAllocator.h

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+// really fast recycling allocator (for use with Lua), by Wouter
+
+#ifdef _DEBUG
+
+#ifdef __cplusplus
+
+class RecyclePool
+{
+    enum { POOLSIZE = 4096 }; // can be absolutely anything
+    enum { PTRSIZE = sizeof(char *) };
+    enum { MAXBUCKETS = 65 }; // meaning up to size 256 on 32bit pointer systems
+	enum { MAXREUSESIZE = MAXBUCKETS*PTRSIZE-PTRSIZE };
+    //int roundup(int s) { return (s+(PTRSIZE-1))&(~(PTRSIZE-1)); };
+	int bucket(int s) { return (s+PTRSIZE-1)>>PTRBITS; };
+    enum { PTRBITS = PTRSIZE==2 ? 1 : PTRSIZE==4 ? 2 : 3 };
+
+    char *p;
+    int left;
+    char *blocks;
+    void *reuse[MAXBUCKETS];
+
+    public:
+
+    RecyclePool();
+    ~RecyclePool() { dealloc_block(blocks); };
+
+    void *alloc(int size);
+    void dealloc(void *p, int size);
+	void *realloc(void *p, int oldsize, int newsize);
+    void stats();
+
+	private:
+
+    void dealloc_block(void *b);
+    void allocnext(int allocsize);
+};
+
+extern "C" {
+#endif
+
+void *recycle_realloc(void *p, int oldsize, int newsize);
+void recycle_free(void *p, int size);
+void recycle_cleanup();
+void recycle_stats();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif