Ò»¸öLinuxÏÂCÏ̳߳صÄʵÏÖ
from:×ÞöεÄרÀ¸
ʲôʱºòÐèÒª´´½¨Ï̳߳ØÄØ£¿¼òµ¥µÄ˵£¬Èç¹ûÒ»¸öÓ¦ÓÃÐèҪƵ·±µÄ´´½¨ºÍÏú»ÙỊ̈߳¬¶øÈÎÎñÖ´ÐеÄʱ¼äÓַdz£¶Ì£¬ÕâÑùÏ̴߳´½¨ºÍÏú»ÙµÄ´øÀ´µÄ¿ªÏú¾Í²»ÈݺöÊÓ£¬ÕâʱҲÊÇÏ̳߳ظóö³¡µÄ»ú»áÁË¡£Èç¹ûÏ̴߳´½¨ºÍÏú»Ùʱ¼äÏà±ÈÈÎÎñÖ´ÐÐʱ¼ä¿ÉÒÔºöÂÔ²»¼Æ£¬ÔòûÓбØҪʹÓÃÏ̳߳ØÁË¡£
ÏÂÃæÊÇLinuxϵͳÏÂÓÃCÓïÑÔ´´½¨µÄÒ»¸öÏ̳߳ء£Ï̳߳ػáά»¤Ò»¸öÈÎÎñÁ´±í(ÿ¸öCThread_worker½á¹¹¾ÍÊÇÒ»¸öÈÎÎñ)¡£
pool_init()º¯ÊýÔ¤ÏÈ´´½¨ºÃmax_thread_num¸öỊ̈߳¬Ã¿¸öÏß³ÌÖ´thread_routine ()º¯Êý¡£¸Ãº¯ÊýÖÐ
while (pool->cur_queue_size == 0)
{
pthread_cond_wait (&(pool->queue_ready),&(pool->queue_lock));
}
±íʾÈç¹ûÈÎÎñÁ´±íÖÐûÓÐÈÎÎñ£¬Ôò¸ÃÏ̳߳öÓÚ×èÈûµÈ´ý״̬¡£·ñÔò´Ó¶ÓÁÐÖÐÈ¡³öÈÎÎñ²¢Ö´ÐС£
pool_add_worker()º¯ÊýÏòÏ̳߳صÄÈÎÎñÁ´±íÖмÓÈëÒ»¸öÈÎÎñ£¬¼ÓÈëºóͨ¹ýµ÷ÓÃpthread_cond_signal (&(pool->queue_ready))»½ÐÑÒ»¸ö³öÓÚ×èÈû״̬µÄÏß³Ì(Èç¹ûÓеĻ°)¡£
pool_destroy ()º¯ÊýÓÃÓÚÏú»ÙÏ̳߳أ¬Ï̳߳ØÈÎÎñÁ´±íÖеÄÈÎÎñ²»»áÔÙ±»Ö´ÐУ¬µ«ÊÇÕýÔÚÔËÐеÄÏ̻߳áÒ»Ö±°ÑÈÎÎñÔËÐÐÍêºóÔÙÍ˳ö¡£
ÏÂÃæÌù³öÍêÕû´úÂë
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <pthread.h>
#include <assert.h>
/*
*Ï̳߳ØÀïËùÓÐÔËÐк͵ȴýµÄÈÎÎñ¶¼ÊÇÒ»¸öCThread_worker
*ÓÉÓÚËùÓÐÈÎÎñ¶¼ÔÚÁ´±íÀËùÒÔÊÇÒ»¸öÁ´±í½á¹¹
*/
typedef struct worker
{
/*»Øµ÷º¯Êý£¬ÈÎÎñÔËÐÐʱ»áµ÷Óô˺¯Êý£¬×¢ÒâÒ²¿ÉÉùÃ÷³ÉÆäËüÐÎʽ*/
void *(*process) (void *arg);
void *arg;/*»Øµ÷º¯ÊýµÄ²ÎÊý*/
struct worker *next;
} CThread_worker;
/*Ï̳߳ؽṹ*/
typedef struct
{
pthread_mutex_t queue_lock;
pthread_cond_t queue_ready;
/*Á´±í½á¹¹£¬Ï̳߳ØÖÐËùÓеȴýÈÎÎñ*/
CThread_worker *queue_head;
/*ÊÇ·ñÏú»ÙÏ̳߳Ø*/
int shutdown;
pthread_t *threadid;
/*Ï̳߳ØÖÐÔÊÐíµÄ»î¶¯Ïß³ÌÊýÄ¿*/
int max_thread_num;
/*µ±Ç°µÈ´ý¶ÓÁеÄÈÎÎñÊýÄ¿*/
int cur_qu
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 ......
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 ......
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 * curren ......
ǶÈëʽlinuxÖеÄlcdÇý¶¯·ÖÎö
×÷Õߣº½ÜÖÞ´åµÄľÃÞ Ñ§Ð££º¹ã¶«¹¤Òµ´óѧ QQ£º568109894
Ô´ÎÄÀ´×Ôhttp://luwenchao100.blog.hexun.com/23060194_d.html
......
ÎÒÃÇÀ´ÅäÖÃÒ»¸öfilter±íµÄ·À»ðǽ ¡¡¡¡
1¡¢²é¿´±¾»ú¹ØÓÚIPTABLESµÄÉèÖÃÇé¿ö
[root@tp ~]# iptables -L -n
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source desti ......