RTEMS  5.1
Data Structures | Macros | Typedefs | Enumerations | Functions
#include <limits.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <pthread.h>
#include <rtems.h>
#include <rtems/error.h>
#include <rtems/thread.h>
#include <rtems/score/assert.h>
#include "rtems/bdbuf.h"

Data Structures

struct  rtems_bdbuf_swapout_transfer
 
struct  rtems_bdbuf_swapout_worker
 
struct  rtems_bdbuf_waiters
 
struct  rtems_bdbuf_cache
 

Macros

#define RTEMS_BDBUF_TRACE   0
 
#define BDBUF_INVALID_DEV   NULL
 
#define bdbuf_config   rtems_bdbuf_configuration
 
#define RTEMS_BDBUF_SWAPOUT_SYNC   RTEMS_EVENT_2
 
#define RTEMS_BDBUF_READ_AHEAD_WAKE_UP   RTEMS_EVENT_1
 
#define rtems_bdbuf_tracer   (0)
 
#define rtems_bdbuf_show_usage()   ((void) 0)
 
#define rtems_bdbuf_show_users(_w, _b)   ((void) 0)
 
#define RTEMS_BDBUF_AVL_MAX_HEIGHT   (32)
 
#define bdbuf_alloc(size)   __builtin_alloca (size)
 

Typedefs

typedef struct rtems_bdbuf_swapout_transfer rtems_bdbuf_swapout_transfer
 
typedef struct rtems_bdbuf_swapout_worker rtems_bdbuf_swapout_worker
 
typedef struct rtems_bdbuf_waiters rtems_bdbuf_waiters
 
typedef struct rtems_bdbuf_cache rtems_bdbuf_cache
 

Enumerations

enum  rtems_bdbuf_fatal_code {
  RTEMS_BDBUF_FATAL_CACHE_WAIT_2, RTEMS_BDBUF_FATAL_CACHE_WAIT_TO, RTEMS_BDBUF_FATAL_CACHE_WAKE, RTEMS_BDBUF_FATAL_PREEMPT_DIS,
  RTEMS_BDBUF_FATAL_PREEMPT_RST, RTEMS_BDBUF_FATAL_RA_WAKE_UP, RTEMS_BDBUF_FATAL_RECYCLE, RTEMS_BDBUF_FATAL_SO_WAKE_1,
  RTEMS_BDBUF_FATAL_SO_WAKE_2, RTEMS_BDBUF_FATAL_STATE_0, RTEMS_BDBUF_FATAL_STATE_2, RTEMS_BDBUF_FATAL_STATE_4,
  RTEMS_BDBUF_FATAL_STATE_5, RTEMS_BDBUF_FATAL_STATE_6, RTEMS_BDBUF_FATAL_STATE_7, RTEMS_BDBUF_FATAL_STATE_8,
  RTEMS_BDBUF_FATAL_STATE_9, RTEMS_BDBUF_FATAL_STATE_10, RTEMS_BDBUF_FATAL_STATE_11, RTEMS_BDBUF_FATAL_SWAPOUT_RE,
  RTEMS_BDBUF_FATAL_TREE_RM, RTEMS_BDBUF_FATAL_WAIT_EVNT, RTEMS_BDBUF_FATAL_WAIT_TRANS_EVNT
}
 

Functions

rtems_status_code rtems_bdbuf_init (void)
 
rtems_status_code rtems_bdbuf_get (rtems_disk_device *dd, rtems_blkdev_bnum block, rtems_bdbuf_buffer **bd_ptr)
 
rtems_status_code rtems_bdbuf_read (rtems_disk_device *dd, rtems_blkdev_bnum block, rtems_bdbuf_buffer **bd_ptr)
 
rtems_status_code rtems_bdbuf_release (rtems_bdbuf_buffer *bd)
 
rtems_status_code rtems_bdbuf_release_modified (rtems_bdbuf_buffer *bd)
 
rtems_status_code rtems_bdbuf_sync (rtems_bdbuf_buffer *bd)
 
rtems_status_code rtems_bdbuf_syncdev (rtems_disk_device *dd)
 
void rtems_bdbuf_purge_dev (rtems_disk_device *dd)
 Purges all buffers corresponding to the disk device dd. More...
 
rtems_status_code rtems_bdbuf_set_block_size (rtems_disk_device *dd, uint32_t block_size, bool sync)
 Sets the block size of a disk device. More...
 
void rtems_bdbuf_get_device_stats (const rtems_disk_device *dd, rtems_blkdev_stats *stats)
 Returns the block device statistics.
 
void rtems_bdbuf_reset_device_stats (rtems_disk_device *dd)
 Resets the block device statistics.
 

Detailed Description

Block device buffer management.

Macro Definition Documentation

◆ RTEMS_BDBUF_AVL_MAX_HEIGHT

#define RTEMS_BDBUF_AVL_MAX_HEIGHT   (32)

The default maximum height of 32 allows for AVL trees having between 5,704,880 and 4,294,967,295 nodes, depending on order of insertion. You may change this compile-time constant as you wish.

◆ RTEMS_BDBUF_SWAPOUT_SYNC

#define RTEMS_BDBUF_SWAPOUT_SYNC   RTEMS_EVENT_2

The events used in this code. These should be system events rather than application events.

◆ RTEMS_BDBUF_TRACE

#define RTEMS_BDBUF_TRACE   0

Set to 1 to enable debug tracing.

Typedef Documentation

◆ rtems_bdbuf_cache

The BD buffer cache.

◆ rtems_bdbuf_swapout_transfer

A swapout transfer transaction data. This data is passed to a worked thread to handle the write phase of the transfer.

◆ rtems_bdbuf_swapout_worker

Swapout worker thread. These are available to take processing from the main swapout thread and handle the I/O operation.

◆ rtems_bdbuf_waiters

Buffer waiters synchronization.