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

windowsϵÄReadFileÓëLinuxϵÄpread

ÎÊÌâµÄÒý³ö£º
         µ±¶ÔͬһÎļþ¾ä±ú£¨ÔÚWindowsÏ£©»òÊÇÎļþÃèÊö·û£¨ÔÚLinuxÏ£©½øÐÐËæ»ú¶Áд²Ù×÷ʱ£¬»á´æÔÚÎļþÖ¸ÕëµÄ¶¨Î»Óë¶Á\дÁ©¸ö²½Ö裬µ«ÓÉÓÚÕâ²»ÊÇÒ»¸öÔ­×Ó²Ù×÷£¬¾Í¿ÉÄܲúÉúÈçÏÂÎÊÌ⣺½ø³ÌA¶ÔijÎļþÏȶ¨Î»µ½ f1 ´¦£¬È»ºó±»Öжϣ¬È»ºó½ø³ÌB¶ÔͬһÎļþ¶¨Î»µ½ f2 ´¦£¬È»ºó±»Öжϣ¬½ø³ÌAÔÙ´ÎÖ´ÐУ¬´ÓÎļþµÄµ±Ç°Ö¸Õë´¦¿ªÊ¼¶Á»òÊÇд£¬ÓÚÊÇÕâ±ã²úÉúÁ˲»ÊÇÆÚÍûµÄ½á¹ûÁË¡££¨ÕâÀïҪעÒ⣬¶ÔͬһÎļþµÄÁ©´Î´ò¿ª£¬µÃµ½µÄ½«ÊÇÁ©¸ö²»Í¬µÄ¾ä±ú»òÊÇÃèÊö·û£¬ËùÒÔ²»Óõ£ÐÄÕâÖÖÇé¿ö»á³öÎÊÌ⣩
½â¾ö°ì·¨£º
         ÔÚLinuxÏ£¬preadº¯Êý¾ÍºÃÏñÊÇרÃÅΪÉÏÃæµÄÎÊÌâ·þÎñµÄ£¬Ëü±¾Éí¾ÍÊÇÔ­×ÓÐԵIJÙ×÷£¬¶¨Î»ÎļþÖ¸ÕëÓë¶Á²Ù×÷Ò»ÆøºÇ³É£¬¶øÇÒ¶Á²Ù×÷²¢²»¸Ä±äÎļþÖ¸Õë¡£
         ÔÚwindowsÏ£¬²Î¿¼ÆäapiʱÎÒ²¢Ã»Óв鵽ÏñpreadÕâôֱ½ÓµÄº¯Êý£¬¶øÊÇReadFileËüµÄÒ»¸ö²ÎÊýlpOverlappedÀ´ÊµÏֵģº
         1£©ÈôÎļþÊÇÒÔ
FILE_FLAG_OVERLAPPED´ò¿ªµÄ£¬ÇÒ lpOverlapped ²»ÎªNULL£¬Ôò¶Á²Ù×÷»áÔÚ
lpOverlapped½á¹¹ÖÐÖ¸¶¨µÄoffset´¦¿ªÊ¼¶ÁÎļþ£¬ÇÒº¯Êý¿ÉÄÜ»áÔÚ¶Á²Ù×÷Íê³Éǰ¾Í·µ»ØÁË£¨¼´Ò첽ģʽ£©
         2£©ÈôÎļþ²»ÊÇÒÔ
FILE_FLAG_OVERLAPPED´ò¿ªµÄ£¬µ«lpOverlapped ²»ÎªNULL£¬Ôò
¶Á²Ù×÷»áÔÚ
lpOverlapped½á¹¹ÖÐÖ¸¶¨µÄoffset´¦¿ªÊ¼¶ÁÎļþ£¬ÇÒº¯Êý»áÒ»Ö±×èÈûÖ±µ½¶Á²Ù×÷Íê³É£¨¼´Í¬²½Ä£Ê½£©
´ÓÉÏÃæ¿ÉÖª£¬ºÃËÆWindowsÏÂReadFileÎÞ·¨ÊµÏÖpreadÔÚLinuxÏµĹ¦ÄÜ£¬³õ²½Ïë·¨ÊǶÔÎļþ¾ä±ú½øÐмÓËøÀ´±ÜÃâÎÊÌâµÄ³öÏÖ£¬²¢ÊµÊ©¶ÔÎļþ½øÐеڶþ´Î¿Õ¶ÁÈ¡£¨¼´¶Á0¸ö×Ö·û£©À´ÎļþÖ¸Õë»Øµ½µÚÒ»´Î¶ÁÈ¡µÄλÖ㬵«Ã»ÊµÏÖ£¬²»Öª¿É·ñ¡££¨´ýÐø£©


Ïà¹ØÎĵµ£º

ÔÚlinuxÏÂʵÏÖweb qqµÄ×ÀÃæ»¯


´´½¨×ÀÃæÍ¼±ê
Ŀǰ½«ÍøÂçÓ¦ÓÃÀ©Õ¹µ½×ÀÃæÊÇÒ»¸öÇ÷ÊÆ£¬´æÔÚןܶà½â¾ö·½°¸£¬±¾ÎÄÒÔ Mozilla Prism ΪÀý£¬ÀàËÆµÄ·½·¨Í¬ÑùÊÊÓÃÓÚ Google Chrome ¡£
1. µ½ Mozilla Prism µÄÍøÕ¾ÉÏÏÂÔØ Prism£¬µã»÷ Download Now Ö®ºó»áÌáʾÓÐÁ½ÖÖ£¬Ò»ÖÖÊÇÒÔ Mozilla Firefox À©Õ¹µÄ·½Ê½£¬ÊʺÏÒѾ­°²×°ÓÐ Firefox µÄÅóÓÑ£»Ò»Ö ......

linux waitpid wait (ת)

  wait(µÈ´ý×Ó½ø³ÌÖжϻò½áÊø)
±íÍ·Îļþ
     #include<sys/types.h>
     #include<sys/wait.h>
¶¨Ò庯Êý pid_t wait (int * status);
º¯Êý˵Ã÷
    wait()»áÔÝʱֹͣĿǰ½ø³ÌµÄÖ´ÐÐ,Ö±µ½ÓÐÐźÅÀ´µ½»ò×Ó½ø³Ì½á
    Êø¡£È ......

linuxÄÚºËÖеÄHlistÓëList_head½á¹¹

List_Head
²Ù×÷ϵͳÄں˾­³£ÐèҪά»¤Êý¾Ý½á¹¹¡£ÄÚºËÓбê×¼µÄÑ­»·Á´±í¡¢Ë«ÏòÁ´±íµÄʵÏÖ¡£ÔÚ<Linux/list.h>ÎļþÖж¨ÒåÁËÒ»¸ölist_headÀàÐͼòµ¥½á¹¹£º
struct list_head {
   struct list_head *next, *prev;
};
 
ͨÓÃÁ´±íµÄ³£ÓÃÓÃ;Êǽ«Ä³Ò»¸öÊý¾Ý½á¹¹±¾Éí´®³ÉÁ´±í£¬»ò½«Ä³Ð©Á´±íÓëÒ»¸öÊý¾Ý½á¹ ......

linux Îļþϵͳ

linux Îļþϵͳ½á¹¹
/       ¸ùĿ¼
/bin         ³£ÓõÄÃüÁî   binary   file   µÄĿ¼
/boot      ´æ·ÅϵͳÆô¶¯Ê±±ØÐë¶ÁÈ¡µÄµµ°¸£¬°üÀ¨ºËÐÄ   (kernel)   ......

ÿÈձؿ´µÄlinuxÍøÕ¾ºÍ²©¿ÍÊÕ¼¯

http://www.linuxjournal.com/
Linux Kernel Newbies
Ò»·½ÊʺÏÄں˿ª·¢³õ¼¶ºÚ¿ÍµÄÀÖÍÁ——¸ÃÍøÕ¾¼¸ºõÄܹ»Âú×ãËùÓÐÄ¥µ¶»ô»ôÏòÄں˵ÄÐÂÊÖµÄÐèÇó¡£
http://kernelnewbies.org/
http://vger.kernel.org/
Á˽âÈçºÎʹÓÃlinuxÄÚºËÁбí
http://www.tux.org/lkml/
Linux
ÐÂÎÅÖÜ¿¯£¬ËüÓÐÒ»¸ö×¨Çø±¨µÀÓйØÄں˵ÄÖØÒª ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ