openflow build environment setup

openflow/include/click/hashallocator.hh

@@ -0,0 +1,103 @@
+// -*- related-file-name: "../../lib/hashallocator.cc" -*-
+#ifndef CLICK_HASHALLOCATOR_HH
+#define CLICK_HASHALLOCATOR_HH
+#if HAVE_VALGRIND && HAVE_VALGRIND_MEMCHECK_H
+# include <valgrind/memcheck.h>
+#endif
+CLICK_DECLS
+
+class HashAllocator { public:
+
+    HashAllocator(size_t size);
+    ~HashAllocator();
+
+    inline void increase_size(size_t new_size) {
+	assert(!_free && !_buffer && new_size >= _size);
+	_size = new_size;
+    }
+
+    inline void *allocate();
+    inline void deallocate(void *p);
+
+    void swap(HashAllocator &x);
+
+  private:
+
+    struct link {
+	link *next;
+    };
+
+    struct buffer {
+	buffer *next;
+	size_t pos;
+	size_t maxpos;
+    };
+
+    enum {
+	min_buffer_size = 1024,
+#if CLICK_LINUXMODULE
+	max_buffer_size = 16384,
+#else
+	max_buffer_size = 1048576,
+#endif
+	min_nelements = 8
+    };
+
+    link *_free;
+    buffer *_buffer;
+    size_t _size;
+
+    void *hard_allocate();
+
+    HashAllocator(const HashAllocator &x);
+    HashAllocator &operator=(const HashAllocator &x);
+
+};
+
+
+template <size_t size>
+class SizedHashAllocator : public HashAllocator { public:
+
+    SizedHashAllocator()
+	: HashAllocator(size) {
+    }
+
+};
+
+
+inline void *HashAllocator::allocate()
+{
+    if (link *l = _free) {
+#ifdef VALGRIND_MEMPOOL_ALLOC
+	VALGRIND_MEMPOOL_ALLOC(this, l, _size);
+	VALGRIND_MAKE_MEM_DEFINED(&l->next, sizeof(l->next));
+#endif
+	_free = l->next;
+#ifdef VALGRIND_MAKE_MEM_DEFINED
+	VALGRIND_MAKE_MEM_UNDEFINED(&l->next, sizeof(l->next));
+#endif
+	return l;
+    } else if (_buffer && _buffer->pos < _buffer->maxpos) {
+	void *data = reinterpret_cast<char *>(_buffer) + _buffer->pos;
+	_buffer->pos += _size;
+#ifdef VALGRIND_MEMPOOL_ALLOC
+	VALGRIND_MEMPOOL_ALLOC(this, data, _size);
+#endif
+	return data;
+    } else
+	return hard_allocate();
+}
+
+inline void HashAllocator::deallocate(void *p)
+{
+    if (p) {
+	reinterpret_cast<link *>(p)->next = _free;
+	_free = reinterpret_cast<link *>(p);
+#ifdef VALGRIND_MEMPOOL_FREE
+	VALGRIND_MEMPOOL_FREE(this, p);
+#endif
+    }
+}
+
+CLICK_ENDDECLS
+#endif