/*
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* Copyright (C) 2015 Spreadtrum Communications Inc.
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _BUGRING_H
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#define _BUGRING_H
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include "mdbg_type.h"
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#define MDBG_RING_R 0
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#define MDBG_RING_W 1
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#define MDBG_RING_MIN_SIZE (1024 * 4)
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#define MDBG_RING_LOCK_SIZE (sizeof(struct mutex))
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struct mdbg_ring_t {
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long int size;
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char *pbuff;
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char *rp;
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char *wp;
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char *end;
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/* 0: WP > RP; 1: RP >WP */
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bool p_order_flag;
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struct mutex *plock;
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};
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struct mdbg_ring_t *mdbg_ring_alloc(long int size);
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void mdbg_ring_destroy(struct mdbg_ring_t *ring);
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int mdbg_ring_read(struct mdbg_ring_t *ring, void *buf, int len);
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int mdbg_ring_write(struct mdbg_ring_t *ring, void *buf, unsigned int len);
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int mdbg_ring_write_timeout(struct mdbg_ring_t *ring, void *buf,
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unsigned int len, unsigned int timeout);
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char *mdbg_ring_write_ext(struct mdbg_ring_t *ring, long int len);
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bool mdbg_ring_will_full(struct mdbg_ring_t *ring, int len);
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long int mdbg_ring_free_space(struct mdbg_ring_t *ring);
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long int mdbg_ring_readable_len(struct mdbg_ring_t *ring);
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void mdbg_ring_clear(struct mdbg_ring_t *ring);
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void mdbg_ring_reset(struct mdbg_ring_t *ring);
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bool mdbg_ring_over_loop(struct mdbg_ring_t *ring, u_long len, int rw);
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void mdbg_ring_print(struct mdbg_ring_t *ring);
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#endif
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