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+/****************************************************************************
+ * drivers/bch/bch_internal.h
+ *
+ * Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __FS_BCH_INTERNAL_H
+#define __FS_BCH_INTERNAL_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <semaphore.h>
+#include <nuttx/fs/fs.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define bchlib_semgive(d) sem_post(&(d)->sem) /* To match bchlib_semtake */
+#define MAX_OPENCNT (255) /* Limit of uint8_t */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+struct bchlib_s
+{
+ struct inode *inode; /* I-node of the block driver */
+ sem_t sem; /* For atomic accesses to this structure */
+ size_t nsectors; /* Number of sectors supported by the device */
+ size_t sector; /* The current sector in the buffer */
+ uint16_t sectsize; /* The size of one sector on the device */
+ uint8_t refs; /* Number of references */
+ bool dirty; /* Data has been written to the buffer */
+ bool readonly; /* true: Only read operations are supported */
+ FAR uint8_t *buffer; /* One sector buffer */
+};
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C" {
+#else
+#define EXTERN extern
+#endif
+
+EXTERN const struct file_operations bch_fops;
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+EXTERN void bchlib_semtake(FAR struct bchlib_s *bch);
+EXTERN int bchlib_flushsector(FAR struct bchlib_s *bch);
+EXTERN int bchlib_readsector(FAR struct bchlib_s *bch, size_t sector);
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __FS_BCH_INTERNAL_H */