Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

ÉîÈëÀí½âLinux kernel£¨Äںˣ©ÖеÄsignalº¯Êý

ÔÚLinuxÄں˴úÂëÖУ¬ÓÐÒ»¸öÐźŴ¦Àí°ó¶¨Æ÷º¯Êýsignal£¬Ëüµ½Ô­ÐͶ¨ÒåÈçÏ£¬Í¨¹ýman 2 signal¿ÉÒԲ鿴ÆäÔ­ÐÍ¡£
#include <signal.h>
typedef void (*sighandler_t)(int);    (1)
sighandler_t signal(int signum,sighandler_t handler);    (2)
µÚÒ»¾äÊǰüº¬Í·Îļþ£¬µÚ¶þ¾äÊÇÀàÐͶ¨Ò壬µÚÈý¾ä²ÅÊÇsignalº¯Êýµ½ÕæÕýÉùÃ÷¡£À©Õ¹ÉùÃ÷ºó£¬ÕæÕýµ½ÉùÃ÷Ϊ
void (*signal(int signum,void (*sighandler)(int)))(int);    (3)
µÚ£¨3£©¿´ÆðÀ´±ÈµÚ£¨1£©ºÍ£¨2£©¾ä¸üÄÑÀí½â£¬Ê×ÏÈ´Ó£¨1£©£¨2£©ÏÂÊÖ¡£
£¨1£©±íʾsighandler_tÊÇ×Ô¶¨ÒåÀàÐÍ£¬ËüÆäʵÊÇÒ»ÖÖº¯ÊýÖ¸ÕëÀàÐÍ£¬ËüÖ¸Ïòµ½º¯Êýµ½ÐβÎΪint£¬·µ»ØÖµÎªvoid¡£
£¨2£©±íʾsignalº¯Êýµ½ÐβÎÓÐÒ»¸öintÐÍsignum£¬ÒÔ¼°Ò»¸ösighandler_tÐ͵½ÐβÎhandler£¬·µ»ØÒ»¸ösighandler_tÐ͵½Öµ£¬ÓÉ£¨1£©¿ÉÒÔÖªµÀ£ºsighandler_tÊǺ¯ÊýÖ¸ÕëÀàÐÍ£¬ËùÒÔsignalµ½µÚ¶þ¸öÐβÎÊÇÒ»¸öº¯ÊýÖ¸Õ룬²¢ÇÒsignalº¯Êý·µ»ØÒ»¸öº¯ÊýÖ¸Õë¡£ËüÃÇÖ¸Ïòµ½º¯ÊýÀàÐͶ¼ÊǾßÓÐÒ»¸öintÐβΣ¬·µ»ØÎªvoidµ½º¯Êý¡£
    ÃԻ󣺶ÔÓÚsignalº¯Êý£¬¶ÔÓÚ³õѧÕßÀ´Ëµ£¬²»½öÊÇÓï·¨Éϵ½ÃԻ󣬻¹ÓÐÓ¦ÓÃÉϵ½ÃÔ»ó£¬ÏÂÃæ½áºÏÎÒ×Ô¼ºµ½Àí½â£¬¾ÙÀý˵Ã÷ÔõÑùÀí½âsignalº¯Êý¡£
´úÂëthink.c-----------------------------------------------------------------------------------
#include<stdio.h>
/*¶¨ÒåÒ»¸öº¯Êý*/
void func(int a){
    printf("in func a=%d\n",a);
}
/*ÉùÃ÷Ò»¸öº¯ÊýÖ¸Õë*/
void (*pfunc)(int);
/*¶¨ÒåÎÒÃÇ×Ô¼ºµ½my_signalº¯Êý*/
void (*my_signal(int sig,void (*handler)(int h)))(int c){
    printf("in my_signal\n");
    /*ÏëÒ»ÏÂÏÂÃæÒ»¾ä£¬¶ÔÂð£¿*/
    return handler;
}
int main(){
    printf("before invoke 'void func(int)'\n");
    func(1);        /*(4)*/
    pfunc=func;
    printf("before invoke 'void func(int) by function pointer'\n");
    pfunc(2);        /*(5)*/
    printf("before invoke 'my_signal(int sig,void (*handler)(int h)))'\n");
&n


Ïà¹ØÎĵµ£º

ʵսLinux Bluetooth±à³Ì£¨Èý£© HCI²ã±à³Ì

1. HCI²ãЭÒé¸ÅÊö£º
HCIÌṩһÌ×ͳһµÄ·½·¨À´·ÃÎÊBluetoothµ×²ã¡£ÈçͼËùʾ£º
´ÓͼÉÏ¿ÉÒÔ¿´³ö£¬Host Controller Interface(HCI)  ¾ÍÊÇÓÃÀ´¹µÍ¨HostºÍModule¡£Hostͨ³£¾ÍÊÇPC£¬ ModuleÔòÊÇÒÔ¸÷ÖÖÎïÀíÁ¬½ÓÐÎʽ£¨USB,serial,pc-cardµÈ£©Á¬½Óµ½PCÉϵÄbluetooth Dongle¡£
ÔÚHostÕâÒ»¶Ë£ºapplication,SDP,L2capµÈЭÒé ......

ʵսLinux Bluetooth±à³Ì£¨ËÄ£© L2CAP²ã±à³Ì

£¨L2CAPЭÒé¼ò½é£¬L2CAPÔÚBlueZÖеÄʵÏÖÒÔ¼°L2CAP±à³Ì½Ó¿Ú£©
Ò»£ºL2CAPЭÒé¼ò½é£º
Logical Link Control and Adaptation Protocol(L2CAP)
Âß¼­Á¬½Ó¿ØÖƺÍÊÊÅäЭÒé (L2CAP) ΪÉϲãЭÒéÌá¹©ÃæÏòÁ¬½ÓºÍÎÞÁ¬½ÓµÄÊý¾Ý·þÎñ£¬²¢Ìṩ¶àЭÒ鹦ÄܺͷָîÖØ×é²Ù×÷¡£L2CAP ³äÐíÉϲãЭÒéºÍÓ¦ÓÃÈí¼þ´«ÊäºÍ½ÓÊÕ×î´ó³¤¶ÈΪ 64K µÄ L2CAP Ê ......

linuxÄÚºËÉý¼¶²½Öè

1¡£ÏÂÔØ2.6.9µÄÄÚºË
2¡£ÔÚ/usr/srcĿ¼Ï½âѹÄÚºË
tar zvxf /ÏÂÔØµÄ·¾¶/linux-2.6.0.tar.gz
 
3¡£ÅäÖÃ
# make mrproper
# make menuconfig
make mrproper ÊÇÇåÀí´úÂëÊ÷µÄ¶¯×÷£¬±£Ö¤Ô´´úÂëÊǸɾ»µÄ
4.±àÒë
make
5¡£°²×°
make modules_install
make install
 
¿´À´2¡£6µÄ±àÒëȷʵ±ÈÒÔ ......

linux ×Ö·û¼¯×ª»»½Ìѵ

linuxϵÄ×Ö·û¼¯×ª»»ÃüÁîÊÇiconv£¬ÎÒÃǶ¼ÖªµÀ´Óutf8±àÂëת»»³Égbk±àÂë¿ÉÒÔÕâô×ö£º
iconv -f utf8 -t gbk aaa.dat > bbb.dat
µ«ÊÇ£¬½ñÌìÓöµ½Ò»¸öÎÊÌâ·¢ÏÖ¶ÔÓÚͬÑùµÄÎļþ£¬²»Í¬µÄ»úÆ÷ÉÏÓеÄÄÜתÓеIJ»ÄÜת£¬ºÜÊÇÀ§»ó¡£×îºó·¢ÏÖ£¬Ô­À´ÊDzÙ×÷ϵͳµÄÎÊÌ⣬һ̨ÊÇredhat£¬Ò»Ì¨ÊÇsolaris¡£ÔÚͬһ¸ö²Ù×÷ϵͳÉÏ´Ógbk--utf8--gb ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ