{"id":37676,"date":"2025-05-16T19:46:01","date_gmt":"2025-05-16T11:46:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/37676.html"},"modified":"2025-05-16T19:46:01","modified_gmt":"2025-05-16T11:46:01","slug":"%e3%80%90linux%e7%ac%94%e8%ae%b0%e3%80%91-%e8%bf%9b%e7%a8%8b%e4%bf%a1%e5%8f%b7%e7%9a%84%e4%bf%9d%e5%ad%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/37676.html","title":{"rendered":"\u3010Linux\u7b14\u8bb0\u3011\u2014\u2014\u8fdb\u7a0b\u4fe1\u53f7\u7684\u4fdd\u5b58"},"content":{"rendered":"<p>&#x1f525;\u4e2a\u4eba\u4e3b\u9875&#x1f525;&#xff1a;\u5b64\u5bc2\u5927\u4ed9V &#x1f308;\u6536\u5f55\u4e13\u680f&#x1f308;&#xff1a;Linux &#x1f339;\u5f80\u671f\u56de\u987e&#x1f339;&#xff1a;\u3010Linux\u7b14\u8bb0\u3011\u2014\u2014\u8fdb\u7a0b\u4fe1\u53f7\u7684\u4ea7\u751f &#x1f516;\u6d41\u6c34\u4e0d\u4e89&#xff0c;\u4e89\u7684\u662f\u6ed4\u6ed4\u4e0d<\/p>\n<hr \/>\n<h4> <\/h4>\n<ul>\n<li>\u4e00\u3001\u4fe1\u53f7\u7684\u76f8\u5173\u6982\u5ff5<\/li>\n<li>\u4e8c\u3001\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/li>\n<li>\n<ul>\n<li>sigset_t<\/li>\n<li>\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/li>\n<li>sigprocmask<\/li>\n<li>sigpending<\/li>\n<\/ul>\n<\/li>\n<li>term \u548c core<\/li>\n<\/ul>\n<h2>\u4e00\u3001\u4fe1\u53f7\u7684\u76f8\u5173\u6982\u5ff5<\/h2>\n<li>\u5b9e\u9645\u6267\u884c\u4fe1\u53f7\u7684\u5904\u7406\u52a8\u4f5c\u79f0\u4e3a\u4fe1\u53f7\u9012\u8fbe(Delivery)\u3002<\/li>\n<li>\u4fe1\u53f7\u4ece\u4ea7\u751f\u5230\u9012\u8fbe\u4e4b\u95f4\u7684\u72b6\u6001&#xff0c;\u79f0\u4e3a\u4fe1\u53f7\u672a\u51b3(Pending)\u3002<\/li>\n<li>\u8fdb\u7a0b\u53ef\u4ee5\u9009\u62e9**\u963b\u585e(Block)**\u67d0\u4e2a\u4fe1\u53f7\u3002<\/li>\n<li>\u88ab\u963b\u585e\u7684\u4fe1\u53f7\u4ea7\u751f\u65f6\u5c06\u4fdd\u6301\u5728\u672a\u51b3\u72b6\u6001&#xff0c;\u76f4\u5230\u8fdb\u7a0b\u89e3\u9664\u5bf9\u6b64\u4fe1\u53f7\u7684\u963b\u585e&#xff0c;\u624d\u80fd\u6267\u884c\u9012\u8fbe\u7684\u52a8\u4f5c\u3002<\/li>\n<li>\u6ce8\u610f&#xff0c;\u963b\u585e\u548c\u5ffd\u7565\u662f\u4e0d\u540c\u7684&#xff0c;\u53ea\u8981\u4fe1\u53f7\u88ab\u963b\u585e\u5c31\u4e0d\u4f1a\u9012\u8fbe&#xff0c;\u800c\u5ffd\u7565\u662f\u5728\u9012\u8fbe\u4e4b\u540e\u53ef\u9009\u7684\u4e00\u79cd\u5904\u7406\u52a8\u4f5c\u3002<\/li>\n<p>\u8fd9\u4e9b\u6982\u5ff5\u90fd\u662f\u5185\u6838\u5b8c\u6210\u7684 <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250516114559-68272577ae971.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5982\u56fe&#xff0c;block\u5c31\u662f\u963b\u585e&#xff0c;pending\u5c31\u662f\u672a\u51b3&#xff0c;handler\u662f\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u5c31\u662f\u4fe1\u53f7\u6765\u4e86\u4ee5\u540e\u201c\u5e72\u5177\u4f53\u4e8b\u60c5\u7684\u5730\u65b9\u201d&#xff0c;\u5b83\u624d\u662f\u6700\u7ec8\u51b3\u5b9a\u4fe1\u53f7\u600e\u4e48\u88ab\u54cd\u5e94\u7684\u201c\u6267\u884c\u52a8\u4f5c\u201d\u3002<\/p>\n<p>\u5bf9block\u548cpending\u8fdb\u884c\u4e00\u4e2a\u6bd4\u55bb&#xff0c;block\u53ef\u4ee5\u7406\u89e3\u4e3a\u62e6\u7740\u4e0d\u8ba9\u5916\u5356\u5458\u6572\u95e8(\u4e0d\u60f3\u6536\u5916\u5356\u65f6\u6302\u4e2a\u7981\u6b62\u901a\u884c\u7684\u724c\u5b50)&#xff0c;\u800cpending\u53ef\u4ee5\u7406\u89e3\u4e3a\u5916\u5356\u5458\u5230\u4e86&#xff0c;\u4f46\u662f\u88ab\u95e8\u5916\u62e6\u7740(\u5916\u5356\u5458\u5728\u95e8\u53e3\u5835\u7740)\u3002<\/p>\n<p>\u7b80\u5355\u68b3\u7406\u4e00\u4e0bhandler\u89e6\u53d1\u7684\u6574\u4e2a\u6d41\u7a0b&#xff1a;<\/p>\n<li>\u4fe1\u53f7\u6765\u4e86(\u5185\u6838\u8bc6\u522b\u5230&#xff0c;\u4e0d\u7ba1\u662f\u786c\u4ef6\u8fd8\u662f\u8f6f\u4ef6\u53d1\u6765\u7684\u4fe1\u53f7)<\/li>\n<li>\u5224\u65adblock&#xff1a;block\u662f\u4e00\u4e2a\u4fe1\u53f7\u4fe1\u53f7\u963b\u585e\u4f4d\u56fe&#xff0c;\u6bcf\u4e00\u4f4d\u5bf9\u5e94\u4e00\u4e2a\u4fe1\u53f7\u6807\u53f71\u8868\u793a\u963b\u585e(block\u4e86&#xff0c;\u4e0d\u8ba9\u9001\u8fbe)0\u8868\u793a\u4e0d\u963b\u585e(\u53ef\u4ee5\u9001\u8fbe)\u3002<\/li>\n<li>\u68c0\u6d4bblock\u4f4d\u56fe\u4e2d&#xff0c;\u4fe1\u53f7\u5bf9\u5e94\u7684\u90a3\u4e00\u4f4d&#xff0c;\u5982\u679c\u662f1&#xff0c;\u5219\u4fe1\u53f7\u662f\u6302\u5230pending\u4f4d\u56fe\u4e2d&#xff0c;\u82e5\u662f0&#xff0c;\u5219\u7406\u89e3\u5f00\u59cb\u4fe1\u53f7\u5904\u7406\u6d41\u7a0b&#xff0c;\u8c03\u7528\u7528\u6237\u6ce8\u518c\u7684handler\u51fd\u6570\u3002<\/li>\n<p>\u6ce8\u610f: \u4fe1\u53f7\u6765\u4e86\u3002\u4e0d\u7ba1block\u4e86\u6ca1\u6709&#xff0c;\u8fd9\u4e2a\u4fe1\u53f7\u90fd\u4f1a\u88ab\u6302\u5230pending\u4f4d\u56fe\u4e2d(\u7f6e\u4e3a1),\u4e5f\u5c31\u662f\u8bf4\u4fe1\u53f7\u6765\u4e86\u5c31\u8bb0\u4e0b\u6765\u4e86pending\u4ee3\u8868\u201c\u6765\u4e86\u201d\u3002 \u7136\u540e\u624d\u4f1a\u53bb\u770bblock\u4f4d\u56fe&#xff0c;\u5982\u679c\u8fd9\u4e2a\u4fe1\u53f7\u5728block\u4e2d\u88ab\u963b\u585e&#xff0c;\u4fe1\u53f7\u5c31\u4f1a\u4e00\u76f4\u6302\u5728pending\u4e2d&#xff0c;\u7b49\u5f85\u89e3\u5c01\u3002\u5982\u679cblock\u6ca1\u6709\u963b\u585e&#xff0c;\u5c31\u4ea4\u4e2ahandler\u6267\u884c\u5566\u3002<\/p>\n<p>\u8fd8\u662f\u770b\u4e0a\u56fe&#xff0c;pending\u4f4d\u56fe\u4fdd\u5b58\u6536\u5230\u7684\u4fe1\u53f7\u4f4d\u56fe&#xff0c;\u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e:\u8868\u793a\u7684\u662f\u7b2c\u51e0\u4e2a\u4fe1\u53f7&#xff0c;\u6bd4\u7279\u4f4d\u7684\u5185\u5bb9:\u8868\u793a\u662f\u5426\u6536\u5230\u3002block\u4f4d\u56fe\u8868\u793a\u662f\u5426\u963b\u585e&#xff0c;\u6bd4\u7279\u4f4d\u7684\u4f4d\u7f6e:\u8868\u793a\u7684\u662f\u7b2c\u51e0\u4e2a\u4fe1\u53f7&#xff0c;\u6bd4\u7279\u4f4d\u7684\u5185\u5bb9\u8868\u793a:\u662f\u5426\u963b\u585e\u3002<\/p>\n<h2>\u4e8c\u3001\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/h2>\n<h3>sigset_t<\/h3>\n<p>\u4ece\u4e0a\u56fe\u6765\u770b,\u6bcf\u4e2a\u4fe1\u53f7\u53ea\u6709\u4e00\u4e2abit\u7684\u672a\u51b3\u6807\u5fd7, \u975e0\u53731, \u4e0d\u8bb0\u5f55\u8be5\u4fe1\u53f7\u4ea7\u751f\u4e86\u591a\u5c11\u6b21,\u963b\u585e\u6807\u5fd7\u4e5f\u662f\u8fd9\u6837 \u8868\u793a\u7684\u3002\u56e0\u6b64, \u672a\u51b3\u548c\u963b\u585e\u6807\u5fd7\u53ef\u4ee5\u52c7\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578bsigset_t\u6765\u5b58\u50a8, , \u8fd9\u4e2a\u7c7b\u578b\u53ef\u4ee5\u8868\u793a\u6bcf\u4e2a\u4fe1\u53f7\u7684\u201c\u6709\u6548\u201d\u6216\u201c\u65e0\u6548\u201d\u72b6\u6001, \u5728\u963b\u585e\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709\u6548\u201d\u548c\u201c\u65e0\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u88ab\u963b\u585e, \u800c\u5728\u672a\u51b3\u4fe1\u53f7\u96c6\u4e2d\u201c\u6709 \u6548\u201d\u548c\u201c\u65e0\u6548\u201d\u7684\u542b\u4e49\u662f\u8be5\u4fe1\u53f7\u662f\u5426\u5904\u4e8e\u672a\u51b3\u72b6\u6001\u3002\u963b\u585e\u4fe1\u53f7\u96c6\u4e5f\u53eb\u505a\u5f53\u524d\u8fdb\u7a0b\u7684 \u8fd9\u91cc\u7684\u201c\u5c4f\u853d\u201d\u5e94\u8be5\u7406\u89e3\u4e3a\u963b\u585e\u2f7d\u4e0d\u662f\u5ffd\u7565\u3002<\/p>\n<h3>\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigemptyset<\/span><span class=\"token punctuation\">(<\/span>sigset_t <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigfillset<\/span><span class=\"token punctuation\">(<\/span>sigset_t <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigaddset<\/span><span class=\"token punctuation\">(<\/span>sigset_t <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> signo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigdelset<\/span><span class=\"token punctuation\">(<\/span>sigset_t <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> signo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigismember<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">const<\/span> sigset_t <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">int<\/span> signo<span class=\"token punctuation\">)<\/span><\/p>\n<p>\u64cd\u4f5c\u4fe1\u53f7\u96c6(sigset_t) \u7684\u4e00\u5806\u51fd\u6570&#xff0c;\u5e72\u7684\u90fd\u662f\u201c\u7ec4\u88c5\u3001\u4fee\u6539\u3001\u5224\u65ad\u4fe1\u53f7\u96c6\u201d\u7684\u6d3b\u3002 \u8fd9\u4e9b\u4fe1\u53f7\u96c6\u5176\u5b9e\u662f\u7528\u6237\u6001\u7684\u4e34\u65f6\u6570\u636e\u7ed3\u6784&#xff0c;\u672c\u8d28\u4e0a\u662f\u4f4d\u56fe&#xff0c;\u8ddf\u5185\u6838\u91ccblock\u4f4d\u56fe\u7684\u5b58\u50a8\u5f62\u5f0f\u7c7b\u4f3c\u3002<\/p>\n<p>\u5178\u578b\u51fd\u6570&#xff1a; sigemptyset&#xff08;\u6e05\u7a7a\u4fe1\u53f7\u96c6&#xff0c;\u5168\u662f0&#xff09; sigfillset&#xff08;\u5168\u586b1&#xff09; sigaddset&#xff08;\u6dfb\u52a0\u67d0\u4e2a\u4fe1\u53f7&#xff09; sigdelset&#xff08;\u5220\u9664\u67d0\u4e2a\u4fe1\u53f7&#xff09; sigismember&#xff08;\u5224\u65ad\u67d0\u4fe1\u53f7\u5728\u4e0d\u5728\u4fe1\u53f7\u96c6\u4e2d&#xff09;<\/p>\n<p>\u8fd9\u56db\u4e2a\u51fd\u6570\u90fd\u662f\u6210\u529f\u8fd4\u56de0,\u51fa\u9519\u8fd4\u56de-1\u3002sigismember\u662f\u2f00\u4e2a\u5e03\u5c14\u51fd\u6570,\u2f64\u4e8e\u5224\u65ad\u2f00\u4e2a\u4fe1\u53f7\u96c6\u7684\u6709\u6548\u4fe1 \u53f7\u4e2d\u662f\u5426\u5305\u542b \u67d0\u79cd \u4fe1\u53f7,\u82e5\u5305\u542b\u5219\u8fd4\u56de1,\u4e0d\u5305\u542b\u5219\u8fd4\u56de0,\u51fa\u9519\u8fd4\u56de-1\u3002<\/p>\n<h3>sigprocmask<\/h3>\n<p>\u8c03\u7528\u51fd\u6570 sigprocmask \u53ef\u4ee5\u8bfb\u53d6\u6216\u66f4\u6539\u8fdb\u7a0b\u7684\u4fe1\u53f7\u5c4f\u853d\u5b57(\u963b\u585e\u4fe1\u53f7\u96c6)\u3002 \u8fd9\u4e2a\u7cfb\u7edf\u8c03\u7528\u624d\u662f\u771f\u6b63\u53bb\u4fee\u6539\u5185\u6838\u4e2d\u5f53\u524d\u8fdb\u7a0b\u7684 block \u4f4d\u56fe\u3002 \u5b83\u4f1a\u7528\u4f60\u51c6\u5907\u597d\u7684\u4fe1\u53f7\u96c6(sigset_t)\u53bb \u201c\u66ff\u6362\u3001\u6dfb\u52a0\u3001\u5220\u9664\u201d block \u4f4d\u56fe\u4e2d\u5bf9\u5e94\u7684\u4f4d\u3002\u6240\u6709\u8fd9\u91cc\u8981\u6ce8\u610f\u4e0a\u9762\u7684\u4fe1\u53f7\u96c6\u64cd\u4f5c\u51fd\u6570\u53ea\u662f\u5de5\u5177&#xff0c;\u4f60\u62ff\u7740\u4fe1\u53f7\u96c6\u8349\u7a3f\u53bb\u627e sigprocmask \u529e\u624b\u7eed&#xff0c;sigprocmask \u5e2e\u4f60\u771f\u6b63\u53bb kernel \u91cc\u6539\u3002<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigprocmask<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> how<span class=\"token punctuation\">,<\/span> <span class=\"token keyword\">const<\/span> sigset_t <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">,<\/span> sigset_t <span class=\"token operator\">*<\/span>oset<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u8fd4\u56de\u503c<span class=\"token operator\">:<\/span>\u82e5\u6210\u529f\u5219\u4e3a<span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span>\u82e5\u51fa\u9519\u5219\u4e3a<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><\/p>\n<p>\u53c2\u6570\u6709&#xff1a; how&#xff1a;\u8868\u793a\u662f\u201c\u6dfb\u52a0&#xff08;\u963b\u585e&#xff09;\u201d\u3001\u201c\u5220\u9664&#xff08;\u89e3\u9664\u963b\u585e&#xff09;\u201d\u3001\u201c\u76f4\u63a5\u66ff\u6362\u6210\u65b0\u7684\u201d\u3002 set&#xff1a;\u4f60\u51c6\u5907\u597d\u7684\u4fe1\u53f7\u96c6\u3002 oldset&#xff1a;\u53ef\u4ee5\u628a\u4fee\u6539\u524d\u7684block\u503c\u4fdd\u5b58\u4e0b\u6765\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/05\/20250516114559-68272577e88ee.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8fd9\u4e9b\u90fd\u662f\u4fee\u6539block\u4f4d\u56fe\u3002<\/p>\n<h3>sigpending<\/h3>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><br \/>\n<span class=\"token keyword\">int<\/span> <span class=\"token function\">sigpending<\/span><span class=\"token punctuation\">(<\/span>sigset_t <span class=\"token operator\">*<\/span>set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n\u8bfb\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684\u672a\u51b3\u4fe1\u53f7\u96c6<span class=\"token punctuation\">,<\/span>\u901a\u8fc7set\u53c2\u6570\u4f20\u51fa\u3002<br \/>\n\u8c03\u2f64\u6210\u529f\u5219\u8fd4\u56de<span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span>\u51fa\u9519\u5219\u8fd4\u56de<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><\/p>\n<p>\u4e0d\u7ba1\u4f60\u7231\u4e0d\u7231\u642d\u7406&#xff08;\u963b\u585e\u4e0d\u963b\u585e&#xff09;&#xff0c;\u4fe1\u53f7\u4e00\u5230&#xff0c;pending \u4f4d\u56fe\u5bf9\u5e94\u7684\u4f4d\u7f6e\u5c31\u4f1a\u88ab\u7f6e 1\u3002 \u4e0d\u4f1a\u56e0\u4e3a block\u3001\u4e0d\u4f1a\u56e0\u4e3a handler \u6b63\u5fd9&#xff0c;\u5c31\u4e0d\u8bb0\u3002\u2192 \u6765\u4e00\u4e2a\u6302\u4e00\u4e2a&#xff0c; pending \u53ea\u8d1f\u8d23\u201c\u6709\u4fe1\u53f7\u6765\u4e86\u201d\u7684\u4e8b\u5b9e&#xff0c;\u4e0d\u8d1f\u8d23\u201c\u8981\u4e0d\u8981\u6267\u884c\u201d\u3002<\/p>\n<p>\u90a3sigpending() \u662f\u5e72\u561b\u7684&#xff1f;<\/p>\n<p>\u67e5\u8be2\u201c\u5f53\u524d\u8fdb\u7a0b\u201d\u54ea\u4e9b\u4fe1\u53f7\u5df2\u7ecf\u6302\u5728 pending \u4f4d\u56fe\u4e0a&#xff08;\u90a3\u4e9b\u201c\u5df2\u7ecf\u5230\u4e86\u4f46\u662f\u8fd8\u6ca1\u88ab\u54cd\u5e94\u201d\u7684\u4fe1\u53f7&#xff09;\u3002 \u7528\u4e8e\u6392\u67e5\u4fe1\u53f7\u662f\u5426\u88ab block \u963b\u585e\u4f4f\u4e86\u3002 \u8bca\u65ad\u4fe1\u53f7\u5904\u7406\u7684\u72b6\u6001&#xff0c;\u662f\u4e2a\u201c\u76d1\u6d4b\u624b\u6bb5\u201d&#xff0c;\u4e0d\u662f\u201c\u5904\u7406\u52a8\u4f5c\u201d\u3002<\/p>\n<p>\u5b9e\u9a8c<\/p>\n<p><span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;iostream&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;unistd.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;cstdio&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/types.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;sys\/wait.h&gt;<\/span><\/span><br \/>\n<span class=\"token macro property\"><span class=\"token directive-hash\">#<\/span><span class=\"token directive keyword\">include<\/span> <span class=\"token string\">&lt;signal.h&gt;<\/span><\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u6253\u5370 pending \u96c6<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">PrintPending<\/span><span class=\"token punctuation\">(<\/span>sigset_t <span class=\"token operator\">&amp;<\/span>pending<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;curr process[&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token function\">getpid<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;] pending: &#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> signo <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">31<\/span><span class=\"token punctuation\">;<\/span> signo <span class=\"token operator\">&gt;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span> signo<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token function\">sigismember<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>pending<span class=\"token punctuation\">,<\/span> signo<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span> <span class=\"token keyword\">else<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\\\\n&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u4fe1\u53f7\u5904\u7406\u51fd\u6570<\/span><br \/>\n<span class=\"token keyword\">void<\/span> <span class=\"token function\">handler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> signo<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> signo <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034; \u53f7\u4fe1\u53f7\u88ab\u9012\u8fbe!!!&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n    sigset_t pending<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sigpending<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>pending<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">PrintPending<\/span><span class=\"token punctuation\">(<\/span>pending<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token keyword\">int<\/span> <span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ 0. \u6355\u6349 2 \u53f7\u4fe1\u53f7<\/span><br \/>\n    <span class=\"token function\">signal<\/span><span class=\"token punctuation\">(<\/span>SIGINT<span class=\"token punctuation\">,<\/span> handler<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>  <span class=\"token comment\">\/\/ \u81ea\u5b9a\u4e49\u6355\u6349 SIGINT (Ctrl&#043;C)<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 1. \u5c4f\u853d 2 \u53f7\u4fe1\u53f7<\/span><br \/>\n    sigset_t block_set<span class=\"token punctuation\">,<\/span> old_set<span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sigemptyset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>block_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sigemptyset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>old_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token function\">sigaddset<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>block_set<span class=\"token punctuation\">,<\/span> SIGINT<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token comment\">\/\/ 1.1 \u8bbe\u7f6e\u8fdb\u7a0b\u7684 Block \u8868<\/span><br \/>\n    <span class=\"token function\">sigprocmask<\/span><span class=\"token punctuation\">(<\/span>SIG_BLOCK<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>block_set<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>old_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>    <span class=\"token keyword\">int<\/span> cnt <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">15<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">while<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token boolean\">true<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n        <span class=\"token comment\">\/\/ 2. \u83b7\u53d6\u5f53\u524d\u8fdb\u7a0b\u7684 pending \u4fe1\u53f7\u96c6<\/span><br \/>\n        sigset_t pending<span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token function\">sigpending<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">&amp;<\/span>pending<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 3. \u6253\u5370 pending \u4fe1\u53f7\u96c6<\/span><br \/>\n        <span class=\"token function\">PrintPending<\/span><span class=\"token punctuation\">(<\/span>pending<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        cnt<span class=\"token operator\">&#8212;<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p>        <span class=\"token comment\">\/\/ 4. \u89e3\u9664\u5bf9 2 \u53f7\u4fe1\u53f7\u7684\u5c4f\u853d<\/span><br \/>\n        <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>cnt <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            std<span class=\"token operator\">::<\/span>cout <span class=\"token operator\">&lt;&lt;<\/span> <span class=\"token string\">&#034;\u89e3\u9664\u5bf9 2 \u53f7\u4fe1\u53f7\u7684\u5c4f\u853d!!!&#034;<\/span> <span class=\"token operator\">&lt;&lt;<\/span> std<span class=\"token operator\">::<\/span>endl<span class=\"token punctuation\">;<\/span><br \/>\n            <span class=\"token function\">sigprocmask<\/span><span class=\"token punctuation\">(<\/span>SIG_SETMASK<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>old_set<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">&amp;<\/span>block_set<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><\/p>\n<p>        <span class=\"token function\">sleep<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token punctuation\">}<\/span><\/p>\n<p>    <span class=\"token keyword\">return<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u524d\u9762 15 \u79d2&#xff0c;Ctrl&#043;C \u6253\u4e86\u5f88\u591a\u6b21&#xff0c;\u90fd\u4e0d\u4f1a\u89e6\u53d1 handler&#xff0c;\u56e0\u4e3a SIGINT \u88ab block \u4e86&#xff0c;\u4f46 pending \u4f4d\u56fe\u8bb0\u5f55\u4e86\u3002<\/p>\n<p>\u4f60\u770b\u5230\u7684&#xff1a;<\/p>\n<p>curr process<span class=\"token punctuation\">[<\/span><span class=\"token number\">448336<\/span><span class=\"token punctuation\">]<\/span> pending<span class=\"token operator\">:<\/span> <span class=\"token number\">0000000000000000000000000000010<\/span><\/p>\n<p>\u4ee3\u8868\u7b2c 2 \u53f7\u4fe1\u53f7 (SIGINT) \u88ab\u6302\u5728 pending \u91cc\u3002<\/p>\n<p>cnt&#061;&#061;0 \u65f6\u89e3\u9664\u963b\u585e&#xff0c;pending \u91cc\u7684 SIGINT \u4f1a\u88ab\u9a6c\u4e0a\u9012\u8fbe&#xff0c;\u8c03\u7528 handler&#xff0c;\u6253\u5370\u4fe1\u53f7\u6536\u5230\u3002<\/p>\n<h2>term \u548c core<\/h2>\n<p>\u5b50\u8fdb\u7a0b\u9000\u51fa\u65f6\u4ea7\u751f\u7684 core \u548c term \u73b0\u8c61&#xff0c;\u672c\u8d28\u4e0a\u4e5f\u662f\u7531\u4fe1\u53f7\u89e6\u53d1\u7684\u7ed3\u679c&#xff0c;\u4e0d\u8fc7\u5b83\u4eec\u4e0d\u5355\u7eaf\u662f\u201c\u4fe1\u53f7\u201d\u672c\u8eab&#xff0c;\u800c\u662f\u4fe1\u53f7\u5e26\u6765\u7684\u9000\u51fa\u72b6\u6001\u3002<\/p>\n<p>core\u4f1a\u5728\u5f53\u524d\u8def\u5f84\u4e0b&#xff0c;\u5f62\u6210\u4e00\u4e2a\u6587\u4ef6&#xff0c;\u8fdb\u7a0b\u5f02\u5e38\u9000\u51fa\u7684\u65f6\u5019&#xff0c;\u8fdb\u7a0b\u5728\u5185\u5b58\u4e2d\u7684\u6838\u5fc3\u6570\u636e&#xff0c;\u4f1a\u4ece\u5185\u5b58\u62f7\u8d1d\u5230\u78c1\u76d8&#xff0c;\u5f62\u6210\u4e00\u4e2a\u6587\u4ef6\u7684\u6838\u5fc3\u8f6c\u50a8&#xff0c;\u5e76\u4e14\u652f\u6301debug\u3002\u7136\u540e\u5728\u8fdb\u7a0b\u9000\u51fa trem\u5c31\u76f4\u63a5\u8fdb\u7a0b\u9000\u51fa\u4e86\u3002<\/p>\n<p>\u5b50\u8fdb\u7a0b\u7684 term \/ core \u662f\u201c\u4fe1\u53f7\u5bfc\u81f4\u7684\u9000\u51fa\u72b6\u6001\u201d&#xff0c;\u672c\u8d28\u662f\u4fe1\u53f7\u4e8b\u4ef6\u7684\u7ed3\u679c\u8868\u73b0\u3002term 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