libcruft-util/memory/buffer/paged.hpp

60 lines
1.5 KiB
C++

/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#ifndef __UTIL_MEMORY_BUFFER_PAGED_HPP
#define __UTIL_MEMORY_BUFFER_PAGED_HPP
#include <cstddef>
namespace util { namespace memory { namespace buffer {
class paged {
public:
using value_type = char;
paged (size_t bytes, size_t window);
~paged ();
paged (const paged&) = delete;
paged (paged &&) = delete;
paged& operator= (const paged&) = delete;
paged& operator= (paged &&) = delete;
char* begin (void);
char* end (void);
const char* cbegin (void);
const char* cend (void);
const char* begin (void) const;
const char* end (void) const;
void access (char*);
size_t size (void) const;
size_t capacity (void) const;
size_t window (void) const;
private:
void commit (char*);
void release (char*);
char *m_begin, *m_end, *m_cursor;
size_t m_window;
};
} } }
#endif