/*
* Amanda, The Advanced Maryland Automatic Network Disk Archiver
* Copyright (c) 2016-2016 Carbonite, Inc. All Rights Reserved.
* All Rights Reserved.
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of U.M. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. U.M. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Authors: the Amanda Development Team. Its members are listed in a
* file named AUTHORS, in the root directory of this distribution.
*/
/*
*
* memory ring buffer
*/
#ifndef MEMRING_H
#define MEMRING_H
#include <glib.h>
#include <stream.h>
typedef struct mem_ring_s {
uint64_t write_offset; /* where to write */
uint64_t written; /* nb bytes written to the ring */
gboolean eof_flag;
char padding1[256 - 2*sizeof(off_t) - sizeof(gboolean)];
uint64_t read_offset; /* where to read */
uint64_t readx; /* nb bytes written to the ring */
char padding2[256 - 2*sizeof(off_t)];
char *buffer;
uint64_t ring_size;
GCond *add_cond; /* some data was added to the ring */
GCond *free_cond; /* some data was freed from the ring */
GMutex *mutex;
size_t consumer_block_size;
size_t producer_block_size;
uint64_t consumer_ring_size;
uint64_t producer_ring_size;
size_t data_avail;
} mem_ring_t;
mem_ring_t *create_mem_ring(void);
void init_mem_ring(mem_ring_t *mem_ring, size_t ring_size, size_t block_size);
void mem_ring_consumer_set_size(mem_ring_t *mem_ring, size_t ring_size, size_t block_size);
void mem_ring_producer_set_size(mem_ring_t *mem_ring, size_t ring_size, size_t block_size);
void close_mem_ring(mem_ring_t *mem_ring);
#endif