LinuxºËÐÄÊý¾Ý½á¹¹
Table of Contents, Show Frames, No Frames
µÚÊ®ÎåÕ LinuxºËÐÄÊý¾Ý½á¹¹
±¾ÕÂÁгöÁËLinuxʵÓõÄÖ÷ÒªÊý¾Ý½á¹¹¡£
block_dev_struct
´Ë½á¹¹ÓÃÓÚÏòºËÐĵǼǿéÉ豸£¬Ëü»¹±»buffer cacheʵÓá£ËùÓдËÀà½á¹¹¶¼Î»ÓÚblk_devÊý×éÖС£
struct blk_dev_struct {
void (*request_fn)(void);
struct request * current_request;
struct request plug;
struct tq_struct plug_tq;
};
buffer_head
´Ë½á¹¹°üº¬¹ØÓÚbuffer cacheÖÐÒ»¿é»º´æµÄÐÅÏ¢¡£
/* bh state bits */
#define BH_Uptodate 0 /* 1 if the buffer contains valid data */
#define BH_Dirty 1 /* 1 if the buffer is dirty */
#define BH_Lock 2 /* 1 if the buffer is locked */
#define BH_Req 3 /* 0 if the buffer has been invalidated */
#define BH_Touched 4 /* 1 if the buffer has been touched (aging) */
#define BH_Has_aged 5 /* 1 if the buffer has been aged (aging) */
#define BH_Protected 6 /* 1 if the buffer is protected */
#define BH_FreeOnIO 7 /* 1 to discard the buffer_head after IO */
struct buffer_head {
/* First cache line: */
unsigned long b_blocknr; /* block number */
kdev_t b_dev; /* device (B_FREE = free) */
kdev_t b_rdev; /* Real device */
unsigned long b_rsector; /* Real buffer location on disk */
struct buffer_head *b_next; /* Hash queue list */
struct buffer_head *b_this_page; /* circular list of buffers in one
page */
/* Second cache line: */
unsigned long b_state; /* buffer state bitmap (above) */
struct buffer_head *b_next_free;
unsigned int b_count; /* users using this block */
unsigned long b_size; /* block size */
/* Non-performance-critical data follows. */
char *b_data; /* pointer to data block *
Ïà¹ØÎĵµ£º
£¨L2CAPÐÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPÐÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼Á¬½Ó¿ØÖƺÍÊÊÅäÐÒé (L2CAP) ΪÉϲãÐÒéÌṩÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àÐÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãÐÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......
Service Discovery Protocol(SDP)ÌṩһÖÖÄÜÁ¦£¬ÈÃÓ¦ÓóÌÐòÓз½·¨·¢ÏÖÄÄÖÖ·þÎñ¿ÉÓÃÒÔ¼°ÕâÖÖ·þÎñµÄÌØÐÔ¡£
·þÎñ·¢ÏÖÐÒé(SDP»òBluetooth SDP)ÔÚÀ¶ÑÀÐÒéÕ»ÖжÔÀ¶ÑÀ»·¾³ÖеÄÓ¦ÓóÌÐòÓÐÌØÊâµÄº¬Ò⣬·¢ÏÖÄĸö·þÎñÊÇ¿ÉÓõĺÍÈ·¶¨ÕâЩ¿ÉÓ÷þÎñµÄÌØÕ÷¡£SDP¶¨ÒåÁËbluetooth client·¢ÏÖ¿ÉÓÃbluetooth server·þÎñºÍËüÃǵÄÌØÕ÷µÄ·½·¨¡£ ......
Ò»£ºÇ°ÑÔ
×î½üÔÚÑо¿androidµÄsensor driver£¬Ö÷ÒªÊÇE-compass£¬ÆäÖÐÓõ½ÁËLinux input×Óϵͳ.ÔÚÍøÉÏÒ²¿´Á˺ܶàÕâ·½ÃæµÄ×ÊÁÏ£¬¸Ð¾õ»¹ÊÇÕâƪ·ÖÎöµÄ±È½ÏϸÖÂ͸³¹£¬Òò´ËתÔØÒ»ÏÂÒÔ±ã×Ô¼ºÑ§Ï°£¬Í¬Ê±ºÍ´ó¼Ò·ÖÏí£¡
£¨Õâƪ²©¿ÍÖ÷ÒªÊÇÒÔ¼üÅÌÇý¶¯ÎªÀýµÄ£¬²»¹ý½²½âµÄÊÇLinux Input Subsystem£¬¿ÉÒÔ×ÐϸµÄÑо¿Ò»Ï£¡£©
¼üÅÌÇý¶¯½«¼ì ......
ÔÚLinux²Ù×÷ϵͳÖУ¬ÓÐÒ»ÏîÌØÊâµÄ¹¦ÄÜ——³õʼ»¯ÄÚ´æÅÌINITRD(INITial Ram Disk)¼¼Êõ£¬¶øÇÒÄÚºËÖ§³ÖѹËõµÄÎļþϵͳӳÏñ¡£ÓÐÁËÕâÁ½ÏÄÜ£¬ÎÒÃÇ¿ÉÒÔÈÃLinuxϵͳ´ÓСµÄ³õʼ»¯ÄÚ´æÅÌÆô¶¯£¬²¢°ÑϵͳÄÚ´æµÄÒ»²¿·Ö×÷Ϊ¸ùÎļþϵͳ¹ÒÔØ¡£
¡¡
¡¡Ramdisk¾ÍÊǽ«ÄÚ´æµÄÒ»²¿·Ö·ÖÅäΪһ¸ö·ÖÇø²¢×÷ΪӲÅÌÀ´Ê¹Ó᣶ÔÓÚϵͳÔËÐÐ ......
The
Java Console provides information about the Java Runtime Environment
(JRE) version, user home directory, and any error message that occurs
while running an applet or application. You can enable the Java Console
for the Linux platform.
......