锘??xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/"><channel><title>&#20122;&#27954;&#21320;&#22812;&#20037;&#20037;&#20037;&#20037;&#22931;&#22899;&#24433;&#38498;&#44;&#25104;&#20154;&#20813;&#36153;&#32593;&#31449;&#20037;&#20037;&#20037;&#44;&#27431;&#32654;&#31934;&#21697;&#19968;&#21306;&#20108;&#21306;&#31934;&#21697;&#20037;&#20037;&#13;</title><link>http://www.shnenglu.com/tianbianlan/category/11224.html</link><description /><language>zh-cn</language><lastBuildDate>Mon, 22 Apr 2013 08:57:28 GMT</lastBuildDate><pubDate>Mon, 22 Apr 2013 08:57:28 GMT</pubDate><ttl>60</ttl><item><title>gprof鈥斺�擥NU鎬ц兘鍒嗘瀽宸ュ叿 </title><link>http://www.shnenglu.com/tianbianlan/archive/2013/04/22/199639.html</link><dc:creator>澶╄竟钃?/dc:creator><author>澶╄竟钃?/author><pubDate>Mon, 22 Apr 2013 08:39:00 GMT</pubDate><guid>http://www.shnenglu.com/tianbianlan/archive/2013/04/22/199639.html</guid><wfw:comment>http://www.shnenglu.com/tianbianlan/comments/199639.html</wfw:comment><comments>http://www.shnenglu.com/tianbianlan/archive/2013/04/22/199639.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/tianbianlan/comments/commentRss/199639.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/tianbianlan/services/trackbacks/199639.html</trackback:ping><description><![CDATA[<address><em>杞澆鑷?/em><a ><em>http://www.cnblogs.com/feisky/archive/2010/03/09/1681997.html</em></a></address>
<h1>gprof浠嬬粛</h1>
<p>gprof鏄疓NU profiler宸ュ叿銆傚彲浠ユ樉紺虹▼搴忚繍琛岀殑&#8220;flat profile&#8221;錛屽寘鎷瘡涓嚱鏁扮殑璋冪敤嬈℃暟錛屾瘡涓嚱鏁版秷鑰楃殑澶勭悊鍣ㄦ椂闂淬�備篃鍙互鏄劇ず&#8220;璋冪敤鍥?#8221;錛屽寘鎷嚱鏁扮殑璋冪敤鍏崇郴錛屾瘡涓嚱鏁拌皟鐢ㄨ姳璐逛簡(jiǎn)澶氬皯鏃墮棿銆傝繕鍙互鏄劇ず&#8220;娉ㄩ噴鐨勬簮浠ｇ爜&#8221;錛屾槸紼嬪簭婧愪唬鐮佺殑涓�涓鏈紝鏍囪鏈夌▼搴忎腑姣忚浠ｇ爜鐨勬墽琛屾鏁般�?/p>
<h1>涓篻prof緙栬瘧紼嬪簭</h1>
<p><br />鍦ㄧ紪璇戞垨閾炬帴婧愮▼搴忕殑鏃跺�欏湪緙栬瘧鍣ㄧ殑<strong>鍛戒護(hù)琛屽弬鏁頒腑鍔犲叆&#8220;-pg&#8221;閫夐」</strong>錛岀紪璇戞椂緙栬瘧鍣ㄤ細(xì)鑷姩鍦ㄧ洰鏍囦唬鐮佷腑鎻掑叆鐢ㄤ簬鎬ц兘嫻嬭瘯鐨勪唬鐮佺墖鏂紝榪欎簺浠ｇ爜鍦ㄧ▼搴忓湪榪愯鏃墮噰闆嗗茍璁板綍鍑芥暟鐨勮皟鐢ㄥ叧緋誨拰璋冪敤嬈℃暟錛屼互鍙?qiáng)閲囬泦迤堣褰曞嚱鏁拌嚜桧n鎵ц鏃墮棿鍜屽瓙鍑芥暟鐨勮皟鐢ㄦ椂闂達(dá)紝<strong>紼嬪簭榪愯緇撴潫鍚庯紝浼?xì)鍦ńE嬪簭閫�鍑虹殑璺緞涓嬬敓鎴愪竴涓猤mon.out鏂囦歡</strong>銆傝繖涓枃浠跺氨鏄褰曞茍淇濆瓨?shù)笅鏉ョ殑鐩戞帶鏁版嵁銆傚彲浠ラ�氳繃鍛戒護(hù)琛屾柟寮忕殑gprof鎴栧浘褰㈠寲鐨凨prof鏉ヨВ璇昏繖浜涙暟鎹茍瀵圭▼搴忕殑鎬ц兘榪涜鍒嗘瀽銆傚彟澶栵紝濡傛灉鎯蟲(chóng)煡鐪嬪簱鍑芥暟鐨刾rofiling錛岄渶瑕佸湪緙栬瘧鏄啀鍔犲叆&#8220;-lc_p&#8221;緙栬瘧鍙傛暟浠ｆ浛&#8220;-lc&#8221;緙栬瘧鍙傛暟錛岃繖鏍風(fēng)▼搴忎細(xì)閾炬帴libc_p.a搴擄紝鎵嶅彲浠ヤ駭鐢熷簱鍑芥暟鐨刾rofiling淇℃伅銆傚鏋滄兂鎵ц涓�琛屼竴琛岀殑profiling錛岃繕闇�瑕佸姞鍏?#8220;-g&#8221;緙栬瘧鍙傛暟銆?br />渚嬪濡備笅鍛戒護(hù)琛岋細(xì)gcc -Wall -g -pg -lc_p example.c -o example</p>
<h1><em>Gprof鍩烘湰鐢ㄦ硶錛?/em></h1>
<p>1錛?浣跨敤 -pg 緙栬瘧鍜岄摼鎺ヤ綘鐨勫簲鐢ㄧ▼搴忋�?/p>
<p>2錛?鎵ц浣犵殑搴旂敤紼嬪簭浣夸箣鐢熸垚渚沢prof 鍒嗘瀽鐨勬暟鎹�?
<p>3錛?浣跨敤gprof 紼嬪簭鍒嗘瀽浣犵殑搴旂敤紼嬪簭鐢熸垚鐨勬暟鎹�?
<p>$<strong>gprof -b a.out gmon.out</strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br />Flat profile: 
<p>Each sample counts as 0.01 seconds.<br />no time accumulated 
<p>&nbsp; %&nbsp;&nbsp; cumulative&nbsp;&nbsp; self&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; self&nbsp;&nbsp;&nbsp;&nbsp; total&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br />time&nbsp;&nbsp; seconds&nbsp;&nbsp; seconds&nbsp;&nbsp;&nbsp; calls&nbsp; Ts/call&nbsp; Ts/call&nbsp; name&nbsp;&nbsp;&nbsp; <br />&nbsp; 0.00&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0.00&nbsp;&nbsp;&nbsp;&nbsp; 0.00&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp; 0.00&nbsp;&nbsp;&nbsp;&nbsp; 0.00&nbsp; function 
<p>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Call graph 
<p>granularity: each sample hit covers 2 byte(s) no time propagated 
<p>index % time&nbsp;&nbsp;&nbsp; self&nbsp; children&nbsp;&nbsp;&nbsp; called&nbsp;&nbsp;&nbsp;&nbsp; name<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0.00&nbsp;&nbsp;&nbsp; 0.00&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1/1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; main [8]<br />[1]&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 0.0&nbsp;&nbsp;&nbsp; 0.00&nbsp;&nbsp;&nbsp; 0.00&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function [1]<br />----------------------------------------------- 
<p>Index by function name 
<p>&nbsp;&nbsp; [1] function 
<h1>gprof浜х敓鐨勪俊鎭?/h1>
<p><br />%&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the percentage of the total running time of the<br />time&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; program used by this function.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鍑芥暟浣跨敤鏃墮棿鍗犳墍鏈夋椂闂寸殑鐧懼垎姣斻�?br />cumulative&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a running sum of the number of seconds accounted<br />seconds&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for by this function and those listed above it.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鍑芥暟鍜屼笂鍒楀嚱鏁扮瘡璁℃墽琛岀殑鏃墮棿銆?br />self&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the number of seconds accounted for by this<br />seconds&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function alone.&nbsp; This is the major sort for this<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; listing.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鍑芥暟鏈韓鎵�鎵ц鐨勬椂闂淬�?br />calls&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the number of times this function was invoked, if<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; this function is profiled, else blank.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鍑芥暟琚皟鐢ㄧ殑嬈℃暟<br />self&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the average number of milliseconds spent in this<br />ms/call&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function per call, if this function is profiled,<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; else blank.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 姣忎竴嬈¤皟鐢ㄨ姳璐瑰湪鍑芥暟鐨勬椂闂磎icroseconds銆?br />total&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the average number of milliseconds spent in this<br />ms/call&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function and its descendents per call, if this<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; function is profiled, else blank.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 姣忎竴嬈¤皟鐢紝鑺辮垂鍦ㄥ嚱鏁板強(qiáng)鍏惰鐢熷嚱鏁扮殑騫沖潎鏃墮棿microseconds銆?br />name&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the name of the function.&nbsp; This is the minor sort<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for this listing. The index shows the location of<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the function in the gprof listing. If the index is<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; in parenthesis it shows where it would appear in<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the gprof listing if it were to be printed.<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鍑芥暟鍚?/p>
<h1>鍛戒護(hù)鏍煎紡</h1>
<p>gprof [鍙墽琛屾枃浠禲 [gmon.out鏂囦歡] [鍏跺畠鍙傛暟] 
<p>鏂規(guī)嫭鍙蜂腑鐨勫唴瀹瑰彲浠ョ渷鐣ャ�傚鏋滅渷鐣ヤ簡(jiǎn)&#8220;鍙墽琛屾枃浠?#8221;錛実prof浼?xì)鍦ㄥ綋鍓嶇洰褰曚笅鎼滅储a.out鏂囦歡浣滀負(fù)鍙墽琛屾枃浠訛紝鑰屽鏋滅渷鐣ヤ簡(jiǎn)gmon.out鏂囦歡錛実prof涔熶細(xì)鍦ㄥ綋鍓嶇洰褰曚笅瀵繪壘gmon.out銆傚叾瀹冨弬鏁板彲浠ユ帶鍒秅prof杈撳嚭鍐呭鐨勬牸寮忕瓑淇℃伅銆傛渶甯哥敤鐨勫弬鏁板涓嬶細(xì) 
<p>l -b 涓嶅啀杈撳嚭緇熻鍥捐〃涓瘡涓瓧孌電殑璇︾粏鎻忚堪銆?
<p>l -p 鍙緭鍑哄嚱鏁扮殑璋冪敤鍥撅紙Call graph鐨勯偅閮ㄥ垎淇℃伅錛夈�?
<p>l -q 鍙緭鍑哄嚱鏁扮殑鏃墮棿娑堣�楀垪琛ㄣ�?
<p>l -e Name 涓嶅啀杈撳嚭鍑芥暟Name 鍙?qiáng)鍏跺瓙鍑芥暟鐨勮皟鐢ㄥ浘锛堥櫎闈炲畠浠湁鏈闄愬埗鐨勫叾瀹冪埗鍑芥晭图?jí)銆傚彲浠ョ粰瀹氬涓?-e 鏍囧織銆備竴涓?-e 鏍囧織鍙兘鎸囧畾涓�涓嚱鏁般�?
<p>l -E Name 涓嶅啀杈撳嚭鍑芥暟Name 鍙?qiáng)鍏跺瓙鍑芥暟鐨勮皟鐢ㄥ浘锛屾鏍囧織绫讳奸g簬 -e 鏍囧織錛屼絾瀹冨湪鎬繪椂闂村拰鐧懼垎姣旀椂闂寸殑璁＄畻涓帓闄や簡(jiǎn)鐢卞嚱鏁癗ame 鍙?qiáng)鍏跺瓙鍑芥暟鎵�鐢ㄧ殑鏃墮棿銆?
<p>l -f Name 杈撳嚭鍑芥暟Name 鍙?qiáng)鍏跺瓙鍑芥暟鐨勮皟鐢ㄥ浘銆傚彲浠ユ寚瀹氬涓?-f 鏍囧織銆備竴涓?-f 鏍囧織鍙兘鎸囧畾涓�涓嚱鏁般�?
<p>l -F Name 杈撳嚭鍑芥暟Name 鍙?qiáng)鍏跺瓙鍑芥暟鐨勮皟鐢ㄥ浘锛屽畠绫讳奸g簬 -f 鏍囧織錛屼絾瀹冨湪鎬繪椂闂村拰鐧懼垎姣旀椂闂磋綆椾腑浠呬嬌鐢ㄦ墍鎵撳嵃鐨勪緥紼嬬殑鏃墮棿銆傚彲浠ユ寚瀹氬涓?-F 鏍囧織銆備竴涓?-F 鏍囧織鍙兘鎸囧畾涓�涓嚱鏁般�?F 鏍囧織瑕嗙洊 -E 鏍囧織銆?
<p>l -z 鏄劇ず浣跨敤嬈℃暟涓洪浂鐨勪緥紼嬶紙鎸夌収璋冪敤璁℃暟鍜岀瘡縐椂闂磋綆楋級(jí)銆?
<p>涓嶈繃,gprof涓嶈兘鏄劇ず瀵硅薄涔嬮棿鐨勭戶鎵垮叧緋?榪欎篃鏄畠鐨勫急鐐?</p><img src ="http://www.shnenglu.com/tianbianlan/aggbug/199639.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/tianbianlan/" target="_blank">澶╄竟钃?/a> 2013-04-22 16:39 <a href="http://www.shnenglu.com/tianbianlan/archive/2013/04/22/199639.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>銆愯漿銆戞祬鏋愮郴緇熺殑澶у皬绔ā寮?</title><link>http://www.shnenglu.com/tianbianlan/archive/2012/01/19/164364.html</link><dc:creator>澶╄竟钃?/dc:creator><author>澶╄竟钃?/author><pubDate>Thu, 19 Jan 2012 03:39:00 GMT</pubDate><guid>http://www.shnenglu.com/tianbianlan/archive/2012/01/19/164364.html</guid><wfw:comment>http://www.shnenglu.com/tianbianlan/comments/164364.html</wfw:comment><comments>http://www.shnenglu.com/tianbianlan/archive/2012/01/19/164364.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/tianbianlan/comments/commentRss/164364.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/tianbianlan/services/trackbacks/164364.html</trackback:ping><description><![CDATA[<h3>
<h1></h1>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>杞澆鏉ユ簮錛?a >http://blog.csdn.net/dragonbooker/article/details/6173321</a><br />澶х妯″紡</span></span></p>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>銆�銆�鎵�璋撶殑澶х妯″紡錛屾槸鎸囨暟鎹殑浣庝綅錛堝氨鏄潈鍊艱緝?yōu)畯鐨勫悗闈㈤偅鍑犱綅锛?jí)淇濆瓨鍦ㄥ唴瀛樼殑楂樺湴鍧�涓紝鑰屾暟鎹殑楂樹(shù)綅錛屼繚瀛樺湪鍐呭瓨鐨勪綆鍦板潃涓紝榪欐牱鐨勫瓨鍌ㄦā寮忔湁鐐瑰効綾諱技浜庢妸鏁版嵁褰撲綔瀛楃涓查『搴忓鐞嗭細(xì)鍦板潃鐢卞皬鍚戝ぇ澧炲姞錛岃�屾暟鎹粠楂樹(shù)綅寰�浣庝綅鏀撅紱</span> </span></p>
<p style="line-height: 130%" sizset="34" sizcache="1"><a name="1_2"></a>&nbsp;</p>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>灝忕妯″紡</span></span></p>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>銆�銆�鎵�璋撶殑灝忕妯″紡錛屾槸鎸囨暟鎹殑浣庝綅淇濆瓨鍦ㄥ唴瀛樼殑浣庡湴鍧�涓紝鑰屾暟</span> <span style="font-family: 瀹?huà)浣?>鎹殑楂樹(shù)綅淇濆瓨鍦ㄥ唴瀛樼殑楂樺湴鍧�涓紝榪欑瀛樺偍妯″紡灝嗗湴鍧�鐨勯珮?shù)綆鍜屾暟鎹綅鏉冩湁鏁堝湴缁撳悎钃v鏉ワ紝楂樺湴鍧�閮ㄥ垎鏉冨�奸珮錛屼綆鍦板潃閮ㄥ垎鏉冨�間綆錛屽拰鎴戜滑鐨勯�昏緫鏂規(guī)硶涓�鑷淬�?/span> </span></p>
<p style="line-height: 130%" sizset="35" sizcache="1"><a name="1_3"></a>&nbsp;</p>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>涓轟粈涔堟湁澶у皬绔ā寮忎箣鍒?/span></span></p>
<p style="text-indent: 21pt; line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>涓轟粈涔堜細(xì)鏈夊ぇ灝忕妯″紡涔嬪垎鍛紵榪欐槸鍥犱負(fù)鍦ㄨ綆楁満緋葷粺涓紝鎴戜滑鏄互瀛楄妭涓哄崟浣嶇殑錛屾瘡涓湴鍧�鍗曞厓閮藉搴旂潃涓�涓瓧鑺傦紝涓�涓瓧鑺備負(fù)</span><span style="font-family: Times New Roman"> 8bit</span><span style="font-family: 瀹?huà)浣?>銆備絾鏄湪</span><span style="font-family: Times New Roman">C</span><span style="font-family: 瀹?huà)浣?>璇█涓櫎浜?/span><span style="font-family: Times New Roman">8bit</span><span style="font-family: 瀹?huà)浣?>鐨?/span><span style="font-family: Times New Roman">char</span><span style="font-family: 瀹?huà)浣?>涔嬪錛岃繕鏈?/span><span style="font-family: Times New Roman">16bit</span><span style="font-family: 瀹?huà)浣?>鐨?/span><span style="font-family: Times New Roman">short</span><span style="font-family: 瀹?huà)浣?>鍨嬶紝</span><span style="font-family: Times New Roman">32bit</span><span style="font-family: 瀹?huà)浣?>鐨?/span><span style="font-family: Times New Roman">long</span><span style="font-family: 瀹?huà)浣?>鍨嬶紙瑕佺湅鍏蜂綋鐨勭紪璇戝櫒錛夛紝鍙﹀錛屽浜庝綅鏁板ぇ浜?/span><span style="font-family: Times New Roman"> 8</span><span style="font-family: 瀹?huà)浣?>浣嶇殑澶勭悊鍣紝渚嬪</span><span style="font-family: Times New Roman">16</span><span style="font-family: 瀹?huà)浣?>浣嶆垨鑰?/span><span style="font-family: Times New Roman">32</span><span style="font-family: 瀹?huà)浣?>浣嶇殑澶勭悊鍣紝鐢變簬瀵勫瓨鍣ㄥ搴﹀ぇ浜庝竴涓瓧鑺傦紝閭ｄ箞蹇呯劧瀛樺湪鐫�涓�涓浣曞皢澶氫釜瀛楄妭瀹夋帓鐨勯棶棰樸�傚洜姝ゅ氨瀵艱嚧浜?jiǎn)澶х瀛樺偍妯″紡鍜尀畯绔瓨鍌ㄦā寮忋�備緥濡備竴涓?/span><span style="font-family: Times New Roman">16bit</span><span style="font-family: 瀹?huà)浣?>鐨?/span><span style="font-family: Times New Roman">short</span><span style="font-family: 瀹?huà)浣?>鍨?/span><span style="font-family: Times New Roman">x</span><span style="font-family: 瀹?huà)浣?>錛屽湪鍐呭瓨?shù)腑鐨勫湴鍧�涓?/span><span style="font-family: Times New Roman">0x0010</span><span style="font-family: 瀹?huà)浣?>錛?/span><span style="font-family: Times New Roman">x</span><span style="font-family: 瀹?huà)浣?>鐨勫�間負(fù)</span><span style="font-family: Times New Roman">0x1122</span><span style="font-family: 瀹?huà)浣?>錛岄偅涔?/span><span style="font-family: Times New Roman">0x11</span><span style="font-family: 瀹?huà)浣?>涓洪珮瀛楄妭錛?/span><span style="font-family: Times New Roman">0x22</span><span style="font-family: 瀹?huà)浣?>涓轟綆瀛楄妭銆傚浜?/span> <span style="font-family: 瀹?huà)浣?>澶х妯″紡錛屽氨灝?/span><span style="font-family: Times New Roman">0x11</span><span style="font-family: 瀹?huà)浣?>鏀懼湪浣庡湴鍧�涓紝鍗?/span><span style="font-family: Times New Roman">0x0010</span><span style="font-family: 瀹?huà)浣?>涓紝</span><span style="font-family: Times New Roman">0x22</span><span style="font-family: 瀹?huà)浣?>鏀懼湪楂樺湴鍧�涓紝鍗?/span><span style="font-family: Times New Roman">0x0011</span><span style="font-family: 瀹?huà)浣?>涓�傚皬绔ā寮忥紝鍒氬ソ鐩稿弽銆傛垜浠父鐢ㄧ殑</span><span style="font-family: Times New Roman">X86</span><span style="font-family: 瀹?huà)浣?>緇撴瀯鏄皬绔ā寮忥紝鑰?/span><span style="font-family: Times New Roman">KEIL C51</span><span style="font-family: 瀹?huà)浣?>鍒欎負(fù)澶х妯″紡銆傚緢澶氱殑</span><span style="font-family: Times New Roman">ARM</span><span style="font-family: 瀹?huà)浣?>錛?/span><span style="font-family: Times New Roman">DSP</span><span style="font-family: 瀹?huà)浣?>閮戒負(fù)灝忕妯″紡銆傛湁浜?/span><span style="font-family: Times New Roman">ARM</span><span style="font-family: 瀹?huà)浣?>澶勭悊鍣ㄨ繕鍙互鐢辯‖浠舵潵閫夋嫨鏄ぇ绔ā寮忚繕鏄皬绔ā寮忋�?/span></span></p>
<h3><span style="font-family: 瀹?huà)浣?><span style="font-size: large">浜屻�佷婦渚嬭鏄?/span></span></h3>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>澶у閮界煡閬撳瓧絎?#8216;</span><span style="font-family: Times New Roman">A</span><span style="font-family: 瀹?huà)浣?>&#8217;鐨?/span><span style="font-family: Times New Roman">ASCII</span><span style="font-family: 瀹?huà)浣?>鐮佸�間負(fù)</span><span style="font-family: Times New Roman">65</span><span style="font-family: 瀹?huà)浣?>錛堝崄榪涘埗錛変篃灝辨槸</span><span style="font-family: Times New Roman">0x41</span><span style="font-family: 瀹?huà)浣?>錛岄偅涔堣繖涓�煎湪涓嶅悓澶у皬绔ā寮忕殑緋葷粺涓瓨鏀劇殑鏂瑰紡鍒嗗埆涓猴細(xì)</span></span></p>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>澶х妯″紡錛?/span><span style="font-family: Times New Roman">00 00 00 41&nbsp;-----</span><span style="font-family: 瀹?huà)浣?>楂樹(shù)綆妯″紡</span></span></p>
<p style="line-height: 130%"><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>灝忕妯″紡錛?/span><span style="font-family: Times New Roman">41 00 00 00 &nbsp;-----</span><span style="font-family: 瀹?huà)浣?>浣庝綆妯″紡</span></span></p>
<h3><span style="font-family: 瀹?huà)浣?><span style="font-size: large">涓夈�佷嬌鐢ㄤ唬鐮佸垽鏂ぇ灝忕妯″紡</span></span></h3>
<p><span style="font-size: small"><span style="font-family: 瀹?huà)浣?>鍙互閫氳繃澹版槑涓�涓仈鍚堬紙</span><span style="font-family: Times New Roman">union</span><span style="font-family: 瀹?huà)浣?>錛夊垽鏂ぇ灝忕妯″紡錛?/span></span></p>
<p>&nbsp;</p>
<p><span style="font-size: small; font-family: Times New Roman">/**</span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman">&nbsp;* </span><span style="font-family: 瀹?huà)浣?>鏂規(guī)硶涓�</span> <span style="font-family: 瀹?huà)浣?>寰楀埌褰撳墠緋葷粺鐨勫ぇ灝忕灞炴�?/span><span style="font-family: Times New Roman">, </span><span style="font-family: 瀹?huà)浣?>姝ゆ柟娉曡淇濊瘉鍦?/span><span style="font-family: Times New Roman">32</span><span style="font-family: 瀹?huà)浣?>浣嶆満嫻嬭瘯</span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small">&nbsp;*/</span></span></p>
<p><span style="font-size: small; font-family: Times New Roman">static union { </span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; char c[4]; </span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp;&nbsp; unsigned long l; </span></span></span></p>
<p><span style="font-size: small; font-family: Times New Roman">} </span></p>
<p>&nbsp;</p>
<p><span style="font-size: small"><span style="font-family: Times New Roman">endian_test = { { 'l', '?', '?', 'b' } }; </span><span style="font-family: 瀹?huà)浣?>銆�銆�</span></span></p>
<p>&nbsp;</p>
<p><span style="font-size: small; font-family: Times New Roman">#define ENDIANNESS ((char)endian_test.l)</span></p>
<p>&nbsp;</p>
<p><span style="font-size: small; font-family: Times New Roman">/**</span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman">&nbsp;* </span><span style="font-family: 瀹?huà)浣?>鏂規(guī)硶浜?/span><span style="font-family: Times New Roman">: </span><span style="font-family: 瀹?huà)浣?>寰楀埌褰撳墠緋葷粺鐨勫ぇ灝忕灞炴�?/span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small">&nbsp;*/</span></span></p>
<p><span style="font-size: small; font-family: Times New Roman">static union {</span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp;&nbsp;&nbsp; short n;</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp;&nbsp;&nbsp; char c[sizeof(short)];</span></span></span></p>
<p><span style="font-size: small; font-family: Times New Roman">}un;</span></p>
<p>&nbsp;</p>
<p><span style="font-size: small; font-family: Times New Roman">int getEndian()</span></p>
<p><span style="font-size: small; font-family: Times New Roman">{</span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; un.n = 0x0102;</span></span></span></p>
<p><span>&nbsp;</span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; if ((un.c[0] == 1 &amp;&amp; un.c[1] == 2))</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; {</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp;&nbsp;&nbsp; printf("big endian/n");</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; }</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; else if ((un.c[0] == 2 &amp;&amp; un.c[1] == 1))</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; {</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp;&nbsp;&nbsp; printf("little endian/n");</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; }</span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; else </span></span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp;&nbsp;&nbsp; printf("error!/n");</span></span></span></p>
<p>&nbsp;</p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; return 0;</span></span></span></p>
<p><span style="font-size: small; font-family: Times New Roman">}</span></p>
<p>&nbsp;</p>
<p><span style="font-size: small; font-family: Times New Roman">/**</span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman">&nbsp;* </span><span style="font-family: 瀹?huà)浣?>鏂規(guī)硶涓?/span><span style="font-family: Times New Roman">: </span><span style="font-family: 瀹?huà)浣?>寰楀埌褰撳墠緋葷粺鐨勫ぇ灝忕灞炴�?/span></span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small">&nbsp;*/</span></span></p>
<p><span style="font-size: small; font-family: Times New Roman">int getEndian()</span></p>
<p><span style="font-size: small; font-family: Times New Roman">{</span></p>
<p><span style="font-family: Times New Roman"><span style="font-size: small"><span>&nbsp;&nbsp; int c = 1;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // big-endian: 00 00 00 01 little-endian: 01 00 00 00</span></span></span></p>
<p>&nbsp;&nbsp;<span style="font-size: small"><span style="font-family: Times New Roman">// int c = 0x02000001;&nbsp;</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span style="font-size: small; font-family: Times New Roman">// big-endian: 02 00 00 01 little-endian: 01 00 00 02</span></span></p>
<p>&nbsp;</p>
<p><span style="font-size: small"><span style="font-family: Times New Roman"><span>&nbsp;&nbsp; if ((*(char *)&amp;c) == 1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // </span></span><span style="font-family: 瀹?huà)浣?>鍙?/span><span style="font-family: Times New Roman">c</span><span style="font-family: 瀹?huà)浣?>鍙橀噺鎵�鍦ㄥ湴鍧�涓婄殑涓�涓瓧鑺傘�?/span></span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman"><span>&nbsp;&nbsp; {</span></span></span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman"><span>&nbsp;&nbsp;&nbsp;&nbsp; printf("little endian/n");</span></span></span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman"><span>&nbsp;&nbsp; }</span></span></span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman"><span>&nbsp;&nbsp; else</span></span></span></p>
<p><span style="font-size: small"><span style="font-family: Times New Roman"><span>&nbsp;&nbsp;&nbsp;&nbsp; printf("big endian");</span></span></span></p>
<p>&nbsp;</p>
<p><span style="font-size: small"><span style="font-family: Times New Roman"><span>&nbsp;&nbsp; return 0;</span></span></span></p>
<p><span style="font-size: small; font-family: Times New Roman">}</span></p><a name="1_1"></a></h3><img src ="http://www.shnenglu.com/tianbianlan/aggbug/164364.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/tianbianlan/" target="_blank">澶╄竟钃?/a> 2012-01-19 11:39 <a href="http://www.shnenglu.com/tianbianlan/archive/2012/01/19/164364.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>榪涚▼闂撮�氫俊鈥斺�擣IFO</title><link>http://www.shnenglu.com/tianbianlan/archive/2009/07/18/90421.html</link><dc:creator>澶╄竟钃?/dc:creator><author>澶╄竟钃?/author><pubDate>Sat, 18 Jul 2009 05:52:00 GMT</pubDate><guid>http://www.shnenglu.com/tianbianlan/archive/2009/07/18/90421.html</guid><wfw:comment>http://www.shnenglu.com/tianbianlan/comments/90421.html</wfw:comment><comments>http://www.shnenglu.com/tianbianlan/archive/2009/07/18/90421.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/tianbianlan/comments/commentRss/90421.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/tianbianlan/services/trackbacks/90421.html</trackback:ping><description><![CDATA[<p>FIFO綆�浠?br>涓轟簡(jiǎn)瑙ｅ喅鍖垮悕綆￠亾鐨勯檺鍒訛紝Linux鐗瑰湴鎻愬嚭浜?jiǎn)FIFO綆￠亾錛屽嵆鏈夊悕綆￠亾銆侳IFO鍗侀�氳繃鏂囦歡鏉ヤ紶杈撴暟鎹殑錛屼絾鍏跺叿鏈夊尶鍚嶇閬撶殑鐗規(guī)�р�斺�斿湪璇誨嚭鏁版嵁鏃訛紝FIFO鍚屼簨娓呯悊綆￠亾涓虹┖銆?/p>
<p>鍒涘緩FIFO綆￠亾<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; $mkfifo &#8211;m 600 fifocat<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; #include &lt;sys/stat.h&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; #include &lt;sys/types.h&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; int mkfifo( const char *filename, mode_t mode );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鍙傛暟璇存槑錛歮ode鎸囧畾FIFO鐨勮鍐欐潈闄愶紝鏂板垱寤篎IFO鐨勭敤鎴稩D鍜岀粍ID瑙勫垯銆備笌open鍑芥暟鐩稿悓銆?br>&nbsp;&nbsp; 鍙傛暟mode 鍒欐湁涓嬪垪鏁扮緇勫悎錛屽彧鏈夊湪寤虹珛鏂版枃浠舵椂鎵嶄細(xì)鐢熸晥錛屾澶栫湡姝ｅ緩鏂囦歡鏃剁殑鏉冮檺浼?xì)鍙楀埌umask鍊兼墍褰卞搷錛屽洜姝よ鏂囦歡鏉冮檺搴旇涓猴紙mode-umaks錛夈�?br>S_IRWXU00700 鏉冮檺錛屼唬琛ㄨ鏂囦歡鎵�鏈夎�呭叿鏈夊彲璇匯�佸彲鍐欏強(qiáng)鍙墽琛岀殑鏉冮檺銆?br>S_IRUSR 鎴朣_IREAD錛?0400鏉冮檺錛屼唬琛ㄨ鏂囦歡鎵�鏈夎�呭叿鏈夊彲璇誨彇鐨勬潈闄愩�?br>S_IWUSR 鎴朣_IWRITE錛?0200 鏉冮檺錛屼唬琛ㄨ鏂囦歡鎵�鏈夎�呭叿鏈夊彲鍐欏叆鐨勬潈闄愩�?br>S_IXUSR 鎴朣_IEXEC錛?0100 鏉冮檺錛屼唬琛ㄨ鏂囦歡鎵�鏈夎�呭叿鏈夊彲鎵ц鐨勬潈闄愩�?br>S_IRWXG 00070鏉冮檺錛屼唬琛ㄨ鏂囦歡鐢ㄦ埛緇勫叿鏈夊彲璇匯�佸彲鍐欏強(qiáng)鍙墽琛岀殑鏉冮檺銆?br>S_IRGRP 00040 鏉冮檺錛屼唬琛ㄨ鏂囦歡鐢ㄦ埛緇勫叿鏈夊彲璇葷殑鏉冮檺銆?br>S_IWGRP 00020鏉冮檺錛屼唬琛ㄨ鏂囦歡鐢ㄦ埛緇勫叿鏈夊彲鍐欏叆鐨勬潈闄愩�?br>S_IXGRP 00010 鏉冮檺錛屼唬琛ㄨ鏂囦歡鐢ㄦ埛緇勫叿鏈夊彲鎵ц鐨勬潈闄愩�?br>S_IRWXO 00007鏉冮檺錛屼唬琛ㄥ叾浠栫敤鎴峰叿鏈夊彲璇匯�佸彲鍐欏強(qiáng)鍙墽琛岀殑鏉冮檺銆?br>S_IROTH 00004 鏉冮檺錛屼唬琛ㄥ叾浠栫敤鎴峰叿鏈夊彲璇葷殑鏉冮檺<br>S_IWOTH 00002鏉冮檺錛屼唬琛ㄥ叾浠栫敤鎴峰叿鏈夊彲鍐欏叆鐨勬潈闄愩�?br>S_IXOTH 00001 鏉冮檺錛屼唬琛ㄥ叾浠栫敤鎴峰叿鏈夊彲鎵ц鐨勬潈闄愩�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; %娉ㄦ剰錛氬綋瑕佸垱寤轟竴涓凡緇忓瓨鍦ㄧ殑FIFO鏃訛紝紼嬪簭浼?xì)漶旂敓涓�涓狤EXIST鐨勫紓甯?/p>
<p>FIFO璇誨啓鎿嶄綔<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 鑸殑I/O錛坥pen close read write unlink錛夊嚱鏁伴兘鍙互鐢ㄤ簬FIFO鏂囦歡錛岄渶瑕佹敞鎰忕殑鏄紝鍦ㄤ嬌鐢╫pen鍑芥暟鎵撳紑涓�涓狥IFO鏂囦歡鏃訛紝open鍑芥暟鍙傛暟flag鏍囧織浣嶇殑O_NONBLOCK鏍囧織錛屽畠鍏崇郴鍒板嚱鏁扮殑榪斿洖鐘舵�併�傝緇嗚鏄庡琛?4-2鎵�紺恒�?br>琛?4-2 open鍑芥暟鐨刦lag(O_NONBLOCK)璇︾粏璇存槑<br>O_NONBLOCK鏍囧織<br>璇?緇?璇?鏄?br>緗綅<br>鍙open绔嬪嵆榪斿洖銆傚綋鍙啓open鏃訛紝濡傛灉娌℃湁榪涚▼涓鴻鎵撳紑FIFO錛屽垯榪斿洖&#8211;1錛屽茍緗甧rrno鍊間負(fù)ENXIO<br>涓嶇疆浣?br>open瑙嗘儏鍐甸樆濉炪�傚彧璇籵pen瑕侀樆濉炲埌鏈夎繘紼嬩負(fù)鍐欐墦寮�FIFO錛屽彧鍐檕pen瑕侀樆濉炲埌鏈夎繘紼嬩負(fù)璇繪墦寮�FIFO</p>
<p><br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; FIFO鐨勫啓鎿嶄綔瑙勫垯綾諱技浜庡尶鍚嶇閬撶殑鍐欐搷浣滆鍒欙紝褰撴病鏈夎繘紼嬩負(fù)璇繪墦寮�FIFO錛岃皟鐢╳rite鍑芥暟鏉ヨ繘琛屽啓鎿嶄綔浼?xì)漶旂敓淇″彿SIGPIPE錛屽垯淇″彿鍙互琚崟鎹夋垨鑰呭畬鍏ㄥ拷鐣ャ�?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; %娉ㄦ剰錛氬綋FIFO鐨勬墍鏈夊啓榪涚▼閮藉凡緇忓叧闂紝鍒欎負(fù)FIFO鐨勮榪涚▼浜х敓涓�涓枃浠剁粨鏉熺銆?/p>
<p><br>FIFO鐨勭己鐐?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 褰撶劧FIFO涔熸湁瀹冪殑灞�闄愭�э紝濡傚浘14-6鎵�紺恒�傚鎴風(fēng)鍙互鍙戣姹傚埌鏈嶅姟鍣紝浣嗗墠鎻愭槸瑕佺煡閬撲竴涓叕鍏辯殑FIFO閫氶亾錛屽浜庡疄鐜版湇鍔″櫒鍥炰紶搴旂瓟鍒板鎴風(fēng)鐨勯棶棰橈紝鍙互閫氳繃涓烘瘡涓�涓鎴風(fēng)鍒涘緩涓�涓笓鐢ㄧ殑FIFO錛屾潵瀹炵幇鍥炰紶搴旂瓟銆備絾涔熸湁涓嶈凍錛屾湇鍔″櫒浼?xì)鍚屾椂搴斀{旀垚鍗冧笂涓囦釜瀹㈡埛绔紝鍒涘緩濡傛澶氱殑FIFO鏄惁浼?xì)鋴删p葷粺璐熻澆榪囧ぇ錛岀浉搴旂殑濡備綍鍒ゆ柇瀹㈡埛绔槸鍚﹀洜鎰忓鑰屽穿婧冩垚涓洪毦棰橈紝鎴栬�呭鎴風(fēng)涓嶈鍙栧簲絳旂洿鎺ラ��鍑猴紝鎵�浠ユ湇鍔″櫒蹇呴』澶勭悊SIGPIPE淇″彿錛屽茍鍋氱浉搴斿鐞嗐�?br></p>
<img src ="http://www.shnenglu.com/tianbianlan/aggbug/90421.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/tianbianlan/" target="_blank">澶╄竟钃?/a> 2009-07-18 13:52 <a href="http://www.shnenglu.com/tianbianlan/archive/2009/07/18/90421.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>榪涚▼闂撮�氫俊鈥斺�旂閬?/title><link>http://www.shnenglu.com/tianbianlan/archive/2009/07/18/90420.html</link><dc:creator>澶╄竟钃?/dc:creator><author>澶╄竟钃?/author><pubDate>Sat, 18 Jul 2009 05:51:00 GMT</pubDate><guid>http://www.shnenglu.com/tianbianlan/archive/2009/07/18/90420.html</guid><wfw:comment>http://www.shnenglu.com/tianbianlan/comments/90420.html</wfw:comment><comments>http://www.shnenglu.com/tianbianlan/archive/2009/07/18/90420.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/tianbianlan/comments/commentRss/90420.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/tianbianlan/services/trackbacks/90420.html</trackback:ping><description><![CDATA[<p style="COLOR: #000080"><span style="COLOR: red">綆￠亾綆�浠?br></span>甯歌鐨勭閬撻兘鏄尶鍚嶅崐鍙屽伐綆￠亾錛屽尶鍚嶅崐鍙屽伐綆￠亾鍦ㄧ郴緇熶腑鏄病鏈夊疄鍚嶇殑錛屽茍涓嶅彲浠ュ湪鏂囦歡緋葷粺涓互浠諱綍鏂瑰紡鐪嬪埌璇ョ閬撱�傚畠鍙槸榪涚▼鐨勪竴縐嶈祫婧愶紝浼?xì)闅忕潃榪涚▼鐨勭粨鏉熻�岃緋葷粺娓呴櫎銆傜閬撻�氫俊鏄湪UNIX緋葷粺涓簲鐢ㄦ瘮杈冮綣佺殑涓�縐嶆柟寮忥紝渚嬪浣跨敤grep鏌ユ壘錛歭s |grep ipc<br>欏懼悕鎬濅箟錛屽尶鍚嶅崐鍙屽伐綆￠亾娌℃湁鍚嶅瓧錛岃繖涓壒鎬у鑷翠簡(jiǎn)瀹冨湪搴旂敤鏂歸潰鐨勫眬闄愭�э細(xì)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1.鍙兘鍦ㄦ湁鍏鋒湁鍏叡紲栧厛鐨勮繘紼嬮棿閫氫俊錛屽嵆鎴栨槸鐖跺瓙鍏崇郴榪涚▼闂淬�佹垨鏄湪鍏勫紵鍏崇郴榪涚▼闂撮�氫俊銆?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2.鏁版嵁鍙兘鍦ㄤ竴涓柟鍚戜笂縐誨姩<br>綆￠亾鍒涘緩<br>灝界榪欐牱錛屽崐鍙屽伐綆￠亾榪樻槸Linux緋葷粺涓婃渶甯歌鐨勯�氫俊鏂瑰紡銆侺inux緋葷粺鐢╬ipe鍑芥暟鍒涘緩涓�涓崐鍙屽伐綆￠亾錛屾湡鍑芥暟鍘熷瀷涓猴細(xì)<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; include&lt;unistd.h&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; int pipe(int fd[2]);<br>&nbsp;&nbsp;&nbsp;&nbsp; 鍙傛暟fd鏄竴涓暱搴︿負(fù)2鐨勬枃浠舵弿榪扮錛宖d[1]涓鴻緭鍏ユ枃浠舵弿榪扮錛宖d[1]涓鴻緭鍑烘枃浠舵弿榪扮錛涘嚱鏁拌繑鍥炵被鍨嬩負(fù)int錛?琛ㄧず鎴愬姛錛?1琛ㄧず澶辮觸銆傚綋鎴愬姛榪斿洖鏃訛紝鍒欒嚜鍔ㄧ淮鎶や竴涓粠fd[1]鍒癴d[0]鐨勫悓琛岀閬撱�?br>綆￠亾鎿嶄綔<br>瀵圭閬撹繘琛岃鍐欙紝鍙互閫氳繃write鍜宺ead榪涜錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; write(fd[1], "create the pipe successfully !\n", 31 ); /*鍚戠閬撳啓鍏ョ鍐欏叆鏁版嵁*/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; char str[256];<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; read(fd[0], str, sizeof(str) ); /*浠庣閬撹鍑虹璇誨嚭鏁版嵁*/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 璇誨啓鏃訛紝闇�瑕佹敞鎰忕殑闂錛?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1.褰撹緭鍑虹鍏抽棴鏃訛紝瀵硅緭鍏ョ鐨勫啓鎿嶄綔浼?xì)漶旂敓淇″彿SIGPIPE錛岃鏄庣閬撹绔凡緇忓叧闂紝騫朵笖write鎿嶄綔榪斿洖涓?#8211;1錛宔rrno鐨勫�間負(fù)EPIPE錛屽浜嶴IGPIPE淇″彿鍙互榪涜鎹曟崏澶勭悊銆?br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2.read榪斿洖0璇存槑綆￠亾涓病鏁版嵁錛屼絾涓嶈兘璇存槑杈撳叆绔槸鍚﹀叧闂?br>鎿嶄綔嫻佺▼<br>&nbsp;&nbsp;&nbsp; 1.鍒涘緩綆￠亾<br>&nbsp;&nbsp;&nbsp; 2.鍒╃敤fork鍒涘緩瀛愯繘紼?br>&nbsp;&nbsp;&nbsp; 3.鎺у埗綆￠亾嫻佸悜<br>&nbsp;&nbsp;&nbsp; 4.浠巉d[1]鍚戠閬撳啓淇℃伅<br>&nbsp;&nbsp;&nbsp; 5.閫氳繃fd[0]浠庣閬撴浮淇℃伅<br>鍒涘緩綆￠亾鐨勬爣鍑嗗簱鍑芥暟<br>&nbsp;&nbsp;&nbsp;&nbsp; #include &lt;stdio.h&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; FILE *popen( const char * command, const char *mode ); <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; int pclose ( FILE *stream );&nbsp; <br>紺轟緥<br>寮曠敤銆奓inux C紼嬪簭璁捐澶у叏銆?涓殑渚嬪瓙<br>#include &lt;unistd.h&gt;<br>#include &lt;stdio.h&gt;<br>#include &lt;fcntl.h&gt;<br>#include &lt;sys/types.h&gt;<br>#define BUFES PIPE_BUF /* PIPE_BUF綆￠亾榛樿涓�嬈℃�ц鍐欑殑鏁版嵁闀垮害*/<br>int main ( void ) {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; int fd[2];<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; char buf[BUFSZ];<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pid_t pid;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; int len; <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ( (pipe(fd)) &lt; 0 ){ /*鍒涘緩綆￠亾*/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; perror ( "failed to pipe" );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exit( 1 );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ( (pid = fork()) &lt; 0 ){ /* 鍒涘緩涓�涓瓙榪涚▼ */<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; perror ( "failed to fork " );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exit( 1 );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; else if ( pid &gt; 0 ){<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; close ( fd[0] ); /*鐖惰繘紼嬩腑鍏抽棴綆￠亾鐨勮鍑虹*/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; write (fd[1], "hello my son!\n", 14 ); /*鐖惰繘紼嬪悜綆￠亾鍐欏叆鏁版嵁*/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exit ( 0);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; else {<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; close ( fd[1] ); /*瀛愯繘紼嬪叧闂閬撶殑鍐欏叆绔?/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; len = read (fd[0], buf, BUFS ); /*瀛愯繘紼嬩粠綆￠亾涓鍑烘暟鎹?/ <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if ( len &lt; 0 ){<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; perror ( "process failed when read a pipe " );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exit( 1 );<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; else <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; write(STDOUT_FILENO, buf, len); /*杈撳嚭鍒版爣鍑嗚緭鍑?/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; exit(0);<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }<br>}</p>
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