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

Pipe is a worm hole connecting C and C++

In C programming language, the observer design pattern is implemented with function pointer (aka callback function). But in Qt library, it introduces signal and slot. How to link a callback function from the C callback function to the C++ siganl and slot is a problem I encounter. Call back function can only be static, but signal and slot can not. There are some triky way to pretend a non-static function to a static function. But the easiest way is to use pipe. the callback function create a pipe and do the read operation, while the siganl function wait for and read at the other end of the pipe.
The pipe is like a worm hole connecting C and C++, two different time and space. How cool!


Ïà¹ØÎĵµ£º

ANSI C —— ¸ñʽ»¯Êä³ö

¡¾Ô­ÐÍ¡¿
printf("<¸ñʽ»¯×Ö·û´®>
", <²ÎÁ¿±í>
);
 
int printf
(const char *format, ...);
int fprintf
(FILE *stream, const char *format, ...);
int sprintf
(char *str, const char *format, ...);
int snprintf
(char *str, size_t size, const char *format, ...);
vp ......

C/C++ÖÐÖ¸ÕëºÍÒýÓÃÖ®Ïà¹ØÎÊÌâÑо¿

 Ò»¡¢»ù±¾ÖªÊ¶
Ö¸ÕëºÍÒýÓõÄÉùÃ÷·½Ê½£º
ÉùÃ÷Ö¸Õ룺char* pc;
ÉùÃ÷ÒýÓãºchar& rc = 0;
 
ËüÃǵÄÇø±ð£º
¢Ù´ÓÏÖÏóÉÏ¿´£¬Ö¸ÕëÔÚÔËÐÐʱ¿ÉÒԸıäÆäËùÖ¸ÏòµÄÖµ£¬¶øÒýÓÃÒ»µ©ºÍij¸ö¶ÔÏó°ó¶¨ºó¾Í²»Ôٸı䡣Õâ¾ä»°¿ÉÒÔÀí½âΪ£ºÖ¸Õë¿ÉÒÔ±»ÖØÐ¸³ÖµÒÔÖ¸ÏòÁíÒ»¸ö²»Í¬µÄ¶ÔÏó¡£µ«ÊÇÒýÓÃÔò×ÜÊÇÖ¸ÏòÔÚ³õʼ»¯Ê±±»Ö¸¶¨µÄ¶Ô ......

c ms/ºÁÃë¼¶ ¼ÆÊ± ¼°time.h ÆäËüº¯ÊýÏê½â

C/C++ÖеÄÈÕÆÚºÍʱ¼ä
ͻ񻣼
±¾ÎÄ´Ó½éÉÜ»ù´¡¸ÅÄîÈëÊÖ£¬Ì½ÌÖÁËÔÚC/C++ÖжÔÈÕÆÚºÍʱ¼ä²Ù×÷ËùÓõ½µÄÊý¾Ý½á¹¹ºÍº¯Êý£¬²¢¶Ô¼ÆÊ±¡¢Ê±¼äµÄ»ñÈ¡¡¢Ê±¼äµÄ¼ÆËãºÍÏÔʾ¸ñʽµÈ·½Ãæ½øÐÐÁ˲ûÊö¡£±¾ÎÄ»¹Í¨¹ý´óÁ¿µÄʵÀýÏòÄãչʾÁËtime.hÍ·ÎļþÖÐÉùÃ÷µÄ¸÷ÖÖº¯ÊýºÍÊý¾Ý½á¹¹µÄÏêϸʹÓ÷½·¨¡£
¹Ø¼ü×Ö£º
UTC£¨ÊÀ½ç±ê׼ʱ¼ä£©£¬Calendar Ti ......

C/C++ ÄÚ´æ¿Õ¼ä·ÖÅä


Ò». ÔÚcÖзÖΪÕ⼸¸ö´æ´¢Çø
1.Õ» - ÓɱàÒëÆ÷×Ô¶¯·ÖÅäÊÍ·Å
2.¶Ñ - Ò»°ãÓɳÌÐòÔ±·ÖÅäÊÍ·Å£¬Èô³ÌÐòÔ±²»ÊÍ·Å£¬³ÌÐò½áÊøÊ±¿ÉÄÜÓÉOS»ØÊÕ
3.È«¾ÖÇø£¨¾²Ì¬Çø£©£¬È«¾Ö±äÁ¿ºÍ¾²Ì¬±äÁ¿µÄ´æ´¢ÊÇ·ÅÔÚÒ»¿éµÄ£¬³õʼ»¯µÄÈ«¾Ö±äÁ¿ºÍ¾²Ì¬±äÁ¿ÔÚÒ»¿éÇøÓò£¬Î´³õʼ»¯µÄÈ«¾Ö±äÁ¿ºÍδ³õʼ»¯µÄ¾²Ì¬±äÁ¿ÔÚÏàÁÚµÄÁíÒ»¿éÇøÓò¡£- ³ÌÐò½áÊøÊÍ·Å
4.Á ......

C/C++ÃæÊÔÌâ

1.½éÉÜÒ»ÏÂSTL£¬Ïêϸ˵Ã÷STLÈçºÎʵÏÖvector.
    Answer£º
    STL £¨±ê׼ģ°æ¿â£¬Standard Template Library.ËüÓÉÈÝÆ÷Ëã·¨µü´úÆ÷×é³É¡£
    STLÓÐÒÔϵÄһЩÓŵ㣺¿ÉÒÔ·½±ãÈÝÒ×µØÊµÏÖËÑË÷Êý¾Ý»ò¶ÔÊý¾ÝÅÅÐòµÈһϵÁеÄËã·¨£»µ÷ÊÔ³ÌÐòʱ¸ü¼Ó°²È« ºÍ·½±ã£»¼´Ê¹ÊÇÈËÃÇÓÃSTLÔÚ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ