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/*****************************************************************************
* Copyright (C) 2013-2017 MulticoreWare, Inc
*
* Authors: liwei <liwei@multicorewareinc.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
*
* This program is also available under a commercial proprietary license.
* For more information, contact us at license @ x265.com
*****************************************************************************/
#ifndef X265_RINGMEM_H
#define X265_RINGMEM_H
#include "common.h"
#include "threading.h"
#if _MSC_VER
#define snprintf _snprintf
#define strdup _strdup
#endif
namespace X265_NS {
#define MAX_SHR_NAME_LEN 256
class RingMem {
public:
RingMem();
~RingMem();
bool skipRead(int32_t cnt);
bool skipWrite(int32_t cnt);
///< initialize
///< protectRW: if use the semaphore the protect the write and read operation.
bool init(int32_t itemSize, int32_t itemCnt, const char *name, bool protectRW = false);
///< finalize
void release();
typedef void(*fnRWSharedData)(void *dst, void *src, int32_t size);
///< data read
bool readNext(void* dst, fnRWSharedData callback);
///< data write
bool writeData(void *data, fnRWSharedData callback);
private:
bool m_initialized;
bool m_protectRW;
int32_t m_itemSize;
int32_t m_itemCnt;
///< data pool
void *m_dataPool;
typedef struct {
///< index to write
int32_t m_write;
///< index to read
int32_t m_read;
}ShrMemCtrl;
ShrMemCtrl *m_shrMem;
#ifdef _WIN32
void *m_handle;
#else // _WIN32
char *m_filepath;
#endif // _WIN32
///< Semaphores
NamedSemaphore *m_writeSem;
NamedSemaphore *m_readSem;
};
};
#endif // ifndef X265_RINGMEM_H
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