RTEMS  5.1
Data Structures | Data Fields
rtems_bdbuf_buffer Struct Reference

#include <bdbuf.h>

Data Structures

struct  rtems_bdbuf_avl_node
 

Data Fields

rtems_chain_node link
 
struct rtems_bdbuf_buffer::rtems_bdbuf_avl_node avl
 
rtems_disk_devicedd
 
rtems_blkdev_bnum block
 
unsigned char * buffer
 
rtems_bdbuf_buf_state state
 
uint32_t waiters
 
rtems_bdbuf_groupgroup
 
uint32_t hold_timer
 
int references
 
void * user
 

Detailed Description

To manage buffers we using buffer descriptors (BD). A BD holds a buffer plus a range of other information related to managing the buffer in the cache. To speed-up buffer lookup descriptors are organized in AVL-Tree. The fields 'dd' and 'block' are search keys.

Field Documentation

◆ block

rtems_blkdev_bnum rtems_bdbuf_buffer::block

block number on the device

◆ buffer

unsigned char* rtems_bdbuf_buffer::buffer

Pointer to the buffer memory area

◆ dd

rtems_disk_device* rtems_bdbuf_buffer::dd

disk device

◆ group

rtems_bdbuf_group* rtems_bdbuf_buffer::group

Pointer to the group of BDs this BD is part of.

◆ hold_timer

uint32_t rtems_bdbuf_buffer::hold_timer

Timer to indicate how long a buffer has been held in the cache modified.

◆ link

rtems_chain_node rtems_bdbuf_buffer::link

Link the BD onto a number of lists.

◆ references

int rtems_bdbuf_buffer::references

Allow reference counting by owner.

◆ state

rtems_bdbuf_buf_state rtems_bdbuf_buffer::state

State of the buffer.

◆ user

void* rtems_bdbuf_buffer::user

User data.

◆ waiters

uint32_t rtems_bdbuf_buffer::waiters

The number of threads waiting on this buffer.


The documentation for this struct was generated from the following file: