{"id":78518,"date":"2026-02-27T20:41:41","date_gmt":"2026-02-27T12:41:41","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/78518.html"},"modified":"2026-02-27T20:41:41","modified_gmt":"2026-02-27T12:41:41","slug":"%e8%bf%9b%e7%a8%8b%e9%97%b4%e9%80%9a%e4%bf%a1%ef%bc%882%ef%bc%89-%e6%b6%88%e6%81%af%e9%98%9f%e5%88%97-%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98-%e4%bf%a1%e5%8f%b7%e7%81%af-%e5%b5%8c%e5%85%a5%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/78518.html","title":{"rendered":"\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff082\uff09---\u6d88\u606f\u961f\u5217\/\u5171\u4eab\u5185\u5b58\/\u4fe1\u53f7\u706f---\u5d4c\u5165\u5f0f\uff08Linux\uff09"},"content":{"rendered":"<h2>1\u3001\u6d88\u606f\u961f\u5217<\/h2>\n<p>\u6d88\u606f\u961f\u5217\u662f Linux \u7cfb\u7edf\u4e2d\u4e00\u79cd\u57fa\u4e8e\u5185\u6838\u7684\u3001\u9762\u5411\u6570\u636e\u5757&#xff08;\u6d88\u606f&#xff09;\u7684\u5f02\u6b65 IPC \u673a\u5236&#xff0c;\u672c\u8d28\u662f\u5185\u6838\u7ef4\u62a4\u7684\u4e00\u4e2a\u6d88\u606f\u94fe\u8868&#xff0c;\u8fdb\u7a0b\u901a\u8fc7 API \u5411\u961f\u5217\u4e2d\u6dfb\u52a0 \/ \u8bfb\u53d6\u6d88\u606f&#xff0c;\u5b9e\u73b0\u8fdb\u7a0b\u95f4\u901a\u4fe1\u3002<\/p>\n<h3>1.1 IPC\u5bf9\u8c61<\/h3>\n<ul>\n<li>\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7\u91cf&#xff08;\u4fe1\u53f7\u706f&#xff09;\u90fd\u5c5e\u4e8eSystem V IPC \u5bf9\u8c61&#xff0c;\u5185\u6838\u4f1a\u4e3a\u6bcf\u4e2a IPC \u5bf9\u8c61\u7ef4\u62a4\u4e00\u4e2a\u72ec\u7acb\u7684\u5185\u6838\u6570\u636e\u7ed3\u6784&#xff08;\u800c\u975e \u201c\u5185\u5b58\u6587\u4ef6\u201d&#xff09;&#xff1b;<\/li>\n<li>\u6bcf\u4e2a IPC \u5bf9\u8c61\u6709\u552f\u4e00\u7684IPC \u6807\u8bc6\u7b26&#xff08;ID&#xff09;&#xff08;\u5982\u6d88\u606f\u961f\u5217 ID\u3001\u5171\u4eab\u5185\u5b58 ID&#xff09;&#xff0c;\u4e14\u4f1a\u88ab\u5185\u6838\u6301\u4e45\u5316&#xff08;\u8fdb\u7a0b\u9000\u51fa\u540e\u4ecd\u5b58\u5728&#xff0c;\u9700\u624b\u52a8\u5220\u9664&#xff09;\u3002<\/li>\n<\/ul>\n<h3>1.2 \u952e\u503c<\/h3>\n<ul>\n<li>\u952e\u503c&#xff08;key_t&#xff09;\u662f IPC \u5bf9\u8c61\u7684\u5168\u5c40\u552f\u4e00\u6807\u8bc6&#xff0c;\u7528\u4e8e\u5728\u591a\u4e2a\u8fdb\u7a0b\u95f4\u5b9a\u4f4d\u540c\u4e00\u4e2a IPC \u5bf9\u8c61&#xff08;ID \u662f\u5185\u6838\u5185\u90e8\u6807\u8bc6&#xff0c;\u952e\u503c\u662f\u7528\u6237\u5c42\u6807\u8bc6&#xff09;&#xff1b;<\/li>\n<li>IPC\u5bf9\u8c61\u7684\u540d\u79f0&#xff0c;\u4e00\u4e2a\u952e\u503c\u5bf9\u5e94\u4e00\u4e2aIPC\u5bf9\u8c61&#xff0c;\u800c\u6bcf\u4e2aIPC\u5bf9\u8c61\u53ea\u80fd\u662f\u4e09\u79cd\u7c7b\u578b\u4e2d\u7684\u4e00\u79cd&#xff1a;&#xff08;\u8981\u4e48\u662f\u6d88\u606f\u961f\u5217&#xff0c;\u8981\u4e48\u662f\u5171\u4eab\u5185\u5b58&#xff0c;\u8981\u4e48\u662f\u4fe1\u53f7\u91cf&#xff09;<\/li>\n<li>\u952e\u503c\u7684\u751f\u6210\u65b9\u5f0f&#xff1a;\n<ul>\n<li>\u624b\u52a8\u6307\u5b9a\u56fa\u5b9a\u503c&#xff08;\u5982key_t key &#061; 0x123456;&#xff09;&#xff1b;<\/li>\n<li>\u901a\u8fc7ftok()\u51fd\u6570\u751f\u6210&#xff08;\u63a8\u8350&#xff0c;\u907f\u514d\u952e\u503c\u51b2\u7a81&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>1.3 \u8fdb\u7a0b\u95f4\u901a\u4fe1&#xff08;\u6d88\u606f\u961f\u5217&#xff09;<\/h3>\n<p>\u591a\u4e2a\u8fdb\u7a0b\u8981\u901a\u8fc7\u6d88\u606f\u961f\u5217\u901a\u4fe1&#xff0c;\u5fc5\u987b\u6ee1\u8db3&#xff1a;<\/p>\n<p>\u4f7f\u7528\u540c\u4e00\u6d88\u606f\u961f\u5217 \u2192 \u8bbf\u95ee\u540c\u4e00\u4e2aSystem V IPC\u5bf9\u8c61 \u2192 \u4f7f\u7528\u540c\u4e00\u4e2a\u952e\u503c&#xff08;key&#xff09; \u2192 &#xff08;\u82e5\u7528ftok&#xff09;\u4f7f\u7528\u540c\u4e00\u4e2apathname\u548cproj_id\u3002<\/p>\n<h3>1.4 \u5e38\u7528\u547d\u4ee4&#xff08;\u7ba1\u7406IPC\u5bf9\u8c61&#xff09;<\/h3>\n<table>\n<tr>\u547d\u4ee4\u529f\u80fd<\/tr>\n<tbody>\n<tr>\n<td>ipcs<\/td>\n<td>\u67e5\u770b\u6240\u6709 System V IPC \u5bf9\u8c61\u7684\u4fe1\u606f&#xff08;\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7\u91cf&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>ipcs -q<\/td>\n<td>\u53ea\u67e5\u770b\u6d88\u606f\u961f\u5217&#xff08;-m&#xff1a;\u5171\u4eab\u5185\u5b58&#xff0c;-s&#xff1a;\u4fe1\u53f7\u91cf&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>ipcs -l<\/td>\n<td>\u53ef\u67e5\u770b IPC \u5bf9\u8c61\u7684\u7cfb\u7edf\u9650\u5236&#xff08;\u5982\u6700\u5927\u6d88\u606f\u961f\u5217\u6570\u3001\u5355\u961f\u5217\u6700\u5927\u5b57\u8282\u6570&#xff09;\u3002<\/td>\n<\/tr>\n<tr>\n<td>ipcrm -Q &lt;KEY&gt;<\/td>\n<td>\u6839\u636e\u952e\u503c&#xff08;key&#xff09;\u5220\u9664\u6d88\u606f\u961f\u5217&#xff08;-M&#xff1a;\u5171\u4eab\u5185\u5b58&#xff0c;-S&#xff1a;\u4fe1\u53f7\u91cf&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>ipcrm -q &lt;MSGID\/SHMID\/SEMID&gt;<\/td>\n<td>\u6839\u636e\u6d88\u606f\u961f\u5217 ID \u5220\u9664\u6d88\u606f\u961f\u5217&#xff08;-m&#xff1a;\u5171\u4eab\u5185\u5b58 ID&#xff0c;-s&#xff1a;\u4fe1\u53f7\u91cf ID&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>1.5 \u6838\u5fc3\u51fd\u6570\u63a5\u53e3<\/h3>\n<h4>1.5.1 ftok&#xff08;\u751f\u6210\u952e\u503c&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<\/p>\n<p>key_t ftok(const char *pathname, int proj_id);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u6839\u636e\u6587\u4ef6\u8def\u5f84\u548c\u9879\u76ee ID \u751f\u6210\u552f\u4e00\u7684 IPC \u952e\u503c&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>pathname&#xff1a;\u5fc5\u987b\u662f\u5b58\u5728\u4e14\u53ef\u8bbf\u95ee\u7684\u6587\u4ef6\u8def\u5f84&#xff08;\u5982&#034;\/tmp\/ipc_test&#034;&#xff09;&#xff1b;<\/li>\n<li>proj_id&#xff1a;\u9879\u76ee ID&#xff08;\u4ec5\u4f4e 8 \u4f4d\u6709\u6548&#xff0c;\u901a\u5e38\u4f20 1 \u4e2a\u5b57\u7b26\u5982&#039;a&#039;&#xff0c;\u8303\u56f4 1-255&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>\u6210\u529f&#xff1a;\u8fd4\u56dekey_t\u7c7b\u578b\u7684\u952e\u503c&#xff1b;<\/li>\n<li>\u5931\u8d25&#xff1a;\u8fd4\u56de-1&#xff08;\u9700\u68c0\u67e5errno&#xff0c;\u5982\u6587\u4ef6\u4e0d\u5b58\u5728\u3001\u6743\u9650\u4e0d\u8db3&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>\u5173\u952e&#xff1a;\u540c\u4e00pathname &#043; \u540c\u4e00proj_id \u2192 \u751f\u6210\u76f8\u540c\u952e\u503c&#xff1b;\u4efb\u610f\u4e00\u4e2a\u4e0d\u540c \u2192 \u952e\u503c\u4e0d\u540c\u3002<\/li>\n<\/ul>\n<h4>1.5.2 msgget&#xff08;\u521b\u5efa \/ \u83b7\u53d6\u6d88\u606f\u961f\u5217&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/msg.h&gt;<\/p>\n<p>int msgget(key_t key, int msgflg);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u521b\u5efa\u65b0\u7684\u6d88\u606f\u961f\u5217&#xff0c;\u6216\u83b7\u53d6\u5df2\u5b58\u5728\u7684\u6d88\u606f\u961f\u5217 ID&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>key&#xff1a;IPC \u952e\u503c&#xff08;\u7531ftok\u751f\u6210\u6216\u624b\u52a8\u6307\u5b9a&#xff09;&#xff1b;<\/li>\n<li>msgflg&#xff1a;\u6807\u5fd7\u4f4d&#xff08;\u7ec4\u5408\u4f7f\u7528&#xff09;&#xff1a;\n<ul>\n<li>IPC_CREAT&#xff1a;\u82e5\u952e\u503c\u5bf9\u5e94\u7684\u961f\u5217\u4e0d\u5b58\u5728\u5219\u521b\u5efa&#xff0c;\u5b58\u5728\u5219\u83b7\u53d6&#xff1b;<\/li>\n<li>IPC_EXCL&#xff1a;\u4e0eIPC_CREAT\u914d\u5408\u4f7f\u7528&#xff0c;\u82e5\u961f\u5217\u5df2\u5b58\u5728\u5219\u62a5\u9519&#xff08;\u786e\u4fdd\u521b\u5efa\u65b0\u961f\u5217&#xff09;&#xff1b;<\/li>\n<li>\u6743\u9650\u4f4d&#xff1a;\u59820664&#xff08;\u540c\u6587\u4ef6\u6743\u9650&#xff0c;\u6240\u6709\u8005\u53ef\u8bfb\u53ef\u5199&#xff0c;\u7ec4\u53ef\u8bfb&#xff0c;\u5176\u4ed6\u53ef\u8bfb&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>\u6210\u529f&#xff1a;\u8fd4\u56de\u6d88\u606f\u961f\u5217 ID&#xff08;\u975e\u8d1f\u6574\u6570&#xff09;&#xff1b;<\/li>\n<li>\u5931\u8d25&#xff1a;\u8fd4\u56de-1&#xff08;\u5982\u6743\u9650\u4e0d\u8db3\u3001\u961f\u5217\u5df2\u5b58\u5728\u4e14\u7528\u4e86IPC_EXCL&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>\u793a\u4f8b&#xff1a;msgget(key, IPC_CREAT | 0664);&#xff08;\u521b\u5efa \/ \u83b7\u53d6\u961f\u5217&#xff0c;\u6743\u9650 0664&#xff09;\u3002<\/li>\n<\/ul>\n<h4>1.5.3 mesgsnd&#xff08;\u53d1\u9001\u6d88\u606f\u5230\u961f\u5217&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/msg.h&gt;<\/p>\n<p>int msgsnd(int msqid, const void *msgp, size_t msgsz, int msgflg);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u5411\u6307\u5b9a\u6d88\u606f\u961f\u5217\u53d1\u9001\u4e00\u6761\u6d88\u606f&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>msqid&#xff1a;\u6d88\u606f\u961f\u5217 ID&#xff08;msgget\u8fd4\u56de\u503c&#xff09;&#xff1b;<\/li>\n<li>msgp&#xff1a;\u6307\u5411\u81ea\u5b9a\u4e49\u6d88\u606f\u7ed3\u6784\u4f53\u7684\u6307\u9488&#xff08;\u5fc5\u987b\u4ee5long mtype\u5f00\u5934&#xff09;&#xff1a;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\/\/ \u81ea\u5b9a\u4e49\u6d88\u606f\u7ed3\u6784&#xff08;mtype\u5fc5\u987b&gt;0&#xff0c;mtext\u957f\u5ea6\u53ef\u81ea\u5b9a\u4e49&#xff09;<br \/>\nstruct msgbuf {<br \/>\n    long mtype;       \/* \u6d88\u606f\u7c7b\u578b&#xff0c;\u5fc5\u987b &gt; 0 *\/<br \/>\n    char mtext[1024]; \/* \u6d88\u606f\u6570\u636e&#xff08;\u53ef\u81ea\u5b9a\u4e49\u957f\u5ea6&#xff09; *\/<br \/>\n};<\/p>\n<ul>\n<li>msgsz&#xff1a;\u6d88\u606f\u6570\u636e\u90e8\u5206\u7684\u957f\u5ea6&#xff08;\u5373mtext\u7684\u6709\u6548\u957f\u5ea6&#xff0c;\u4e0d\u542bmtype&#xff09;&#xff1b;<\/li>\n<li>msgflg&#xff1a;\u53d1\u9001\u6807\u5fd7&#xff1a;\n<ul>\n<li>0&#xff1a;\u9ed8\u8ba4&#xff0c;\u961f\u5217\u6ee1\u65f6\u963b\u585e&#xff1b;<\/li>\n<li>IPC_NOWAIT&#xff1a;\u961f\u5217\u6ee1\u65f6\u4e0d\u963b\u585e&#xff0c;\u76f4\u63a5\u8fd4\u56de\u9519\u8bef&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de0&#xff0c;\u5931\u8d25\u8fd4\u56de-1&#xff08;\u5982\u961f\u5217\u4e0d\u5b58\u5728\u3001\u6743\u9650\u4e0d\u8db3\u3001\u6d88\u606f\u7c7b\u578b\u22640&#xff09;\u3002<\/li>\n<\/ul>\n<h4>1.5.4 msgrcv&#xff08;\u4ece\u961f\u5217\u63a5\u6536\u6d88\u606f&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/msg.h&gt;<\/p>\n<p>ssize_t msgrcv(int msqid, void *msgp, size_t msgsz, long msgtyp, int msgflg);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u4ece\u6d88\u606f\u961f\u5217\u4e2d\u8bfb\u53d6\u6307\u5b9a\u7c7b\u578b\u7684\u6d88\u606f&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>msqid&#xff1a;\u6d88\u606f\u961f\u5217 ID&#xff1b;<\/li>\n<li>msgp&#xff1a;\u5b58\u653e\u63a5\u6536\u6d88\u606f\u7684\u7f13\u51b2\u533a&#xff08;\u540cmsgsnd\u7684msgbuf\u7ed3\u6784&#xff09;&#xff1b;<\/li>\n<li>msgsz&#xff1a;\u7f13\u51b2\u533amtext\u7684\u6700\u5927\u957f\u5ea6&#xff08;\u8d85\u51fa\u90e8\u5206\u4f1a\u88ab\u622a\u65ad&#xff0c;\u4e14\u4e0d\u62a5\u9519&#xff09;&#xff1b;<\/li>\n<li>msgtyp&#xff1a;\u6307\u5b9a\u63a5\u6536\u7684\u6d88\u606f\u7c7b\u578b&#xff08;\u6838\u5fc3\u53c2\u6570&#xff09;&#xff1a;\n<ul>\n<li>msgtyp &#061; 0&#xff1a;\u8bfb\u53d6\u961f\u5217\u4e2d\u7b2c\u4e00\u4e2a\u6d88\u606f&#xff08;\u4e0d\u533a\u5206\u7c7b\u578b&#xff09;&#xff1b;<\/li>\n<li>msgtyp &gt; 0&#xff1a;\u8bfb\u53d6\u961f\u5217\u4e2d\u7b2c\u4e00\u4e2a\u7c7b\u578b\u4e3a msgtyp\u7684\u6d88\u606f&#xff1b;<\/li>\n<li>msgtyp &lt; 0&#xff1a;\u8bfb\u53d6\u961f\u5217\u4e2d\u7c7b\u578b\u2264|msgtyp|\u7684\u6700\u5c0f\u7c7b\u578b\u7684\u6d88\u606f&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>msgflg&#xff1a;\u63a5\u6536\u6807\u5fd7&#xff1a;\n<ul>\n<li>0&#xff1a;\u9ed8\u8ba4&#xff0c;\u961f\u5217\u65e0\u5339\u914d\u6d88\u606f\u65f6\u963b\u585e&#xff1b;<\/li>\n<li>IPC_NOWAIT&#xff1a;\u65e0\u5339\u914d\u6d88\u606f\u65f6\u4e0d\u963b\u585e&#xff0c;\u76f4\u63a5\u8fd4\u56de\u9519\u8bef&#xff1b;<\/li>\n<li>MSG_NOERROR&#xff1a;\u6d88\u606f\u957f\u5ea6\u8d85\u8fc7msgsz\u65f6&#xff0c;\u622a\u65ad\u6570\u636e\u4e14\u4e0d\u62a5\u9519&#xff08;\u9ed8\u8ba4\u4f1a\u62a5\u9519&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>\u6210\u529f&#xff1a;\u8fd4\u56de\u5b9e\u9645\u8bfb\u53d6\u7684mtext\u5b57\u8282\u6570&#xff1b;<\/li>\n<li>\u5931\u8d25&#xff1a;\u8fd4\u56de-1&#xff08;\u5982\u961f\u5217\u4e0d\u5b58\u5728\u3001\u6743\u9650\u4e0d\u8db3&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>1.5.5 msgctl&#xff08;\u63a7\u5236\u6d88\u606f\u961f\u5217&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/msg.h&gt;<\/p>\n<p>int msgctl(int msqid, int cmd, struct msqid_ds *buf);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u5bf9\u6d88\u606f\u961f\u5217\u6267\u884c\u63a7\u5236\u64cd\u4f5c&#xff08;\u67e5\u8be2\u72b6\u6001\u3001\u4fee\u6539\u5c5e\u6027\u3001\u5220\u9664\u961f\u5217&#xff09;&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>msqid&#xff1a;\u6d88\u606f\u961f\u5217 ID&#xff1b;<\/li>\n<li>cmd&#xff1a;\u63a7\u5236\u547d\u4ee4&#xff08;\u6838\u5fc3&#xff09;&#xff1a;\n<ul>\n<li>IPC_STAT&#xff1a;\u83b7\u53d6\u961f\u5217\u7684\u72b6\u6001\u4fe1\u606f&#xff08;\u5b58\u5165buf&#xff09;&#xff1b;<\/li>\n<li>IPC_SET&#xff1a;\u4fee\u6539\u961f\u5217\u7684\u5c5e\u6027&#xff08;\u4ecebuf\u8bfb\u53d6&#xff09;&#xff1b;<\/li>\n<li>IPC_RMID&#xff1a;\u5220\u9664\u6d88\u606f\u961f\u5217&#xff08;\u6700\u5e38\u7528&#xff0c;\u5220\u9664\u540e\u961f\u5217\u7acb\u5373\u6d88\u5931&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>buf&#xff1a;\n<ul>\n<li>\u6267\u884cIPC_STAT\/IPC_SET\u65f6&#xff1a;\u6307\u5411msqid_ds\u7ed3\u6784\u4f53&#xff08;\u5b58\u653e\u961f\u5217\u72b6\u6001&#xff09;&#xff1b;<\/li>\n<li>\u6267\u884cIPC_RMID\u65f6&#xff1a;\u4f20NULL\u5373\u53ef&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de0&#xff0c;\u5931\u8d25\u8fd4\u56de-1&#xff08;\u5982\u961f\u5217\u4e0d\u5b58\u5728\u3001\u65e0\u5220\u9664\u6743\u9650&#xff09;&#xff1b;<\/li>\n<li>\u793a\u4f8b&#xff1a;msgctl(msqid, IPC_RMID, NULL);&#xff08;\u5220\u9664\u6d88\u606f\u961f\u5217&#xff09;\u3002<\/li>\n<\/ul>\n<h2>2\u3001\u5171\u4eab\u5185\u5b58<\/h2>\n<p>\u5171\u4eab\u5185\u5b58\u662f Linux \u4e2d\u6700\u9ad8\u6548\u7684\u8fdb\u7a0b\u95f4\u901a\u4fe1\u65b9\u5f0f\u2014\u2014 \u5185\u6838\u5728\u7269\u7406\u5185\u5b58\u4e2d\u5f00\u8f9f\u4e00\u5757\u8fde\u7eed\u533a\u57df&#xff0c;\u591a\u4e2a\u8fdb\u7a0b\u5c06\u8fd9\u5757\u5185\u5b58\u6620\u5c04\u5230\u81ea\u5df1\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4&#xff0c;\u8fdb\u7a0b\u53ef\u76f4\u63a5\u8bfb\u5199\u8be5\u5185\u5b58&#xff08;\u65e0\u9700\u6570\u636e\u62f7\u8d1d&#xff09;&#xff0c;\u901a\u4fe1\u6548\u7387\u8fdc\u8d85\u7ba1\u9053 \/ \u6d88\u606f\u961f\u5217\u3002<\/p>\n<p>\u6838\u5fc3\u4f18\u52bf&#xff1a;\u5176\u4ed6 IPC \u65b9\u5f0f&#xff08;\u5982\u6d88\u606f\u961f\u5217&#xff09;\u9700\u8981 2 \u6b21\u6570\u636e\u62f7\u8d1d&#xff08;\u7528\u6237\u6001\u2192\u5185\u6838\u6001\u2192\u7528\u6237\u6001&#xff09;&#xff0c;\u5171\u4eab\u5185\u5b58\u4ec5\u9700\u6620\u5c04&#xff0c;\u6570\u636e\u76f4\u63a5\u5728\u7528\u6237\u6001\u8bfb\u5199&#xff0c;\u65e0\u62f7\u8d1d\u5f00\u9500\u3002<\/p>\n<h3>2.1 \u6838\u5fc3\u51fd\u6570\u63a5\u53e3<\/h3>\n<h4>2.1.1 ftok(\u540c\u6d88\u606f\u961f\u5217&#xff09;<\/h4>\n<h4>2.1.2 shmget&#xff08;\u521b\u5efa \/ \u83b7\u53d6\u5171\u4eab\u5185\u5b58&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/shm.h&gt;<\/p>\n<p>int shmget(key_t key, size_t size, int shmflg);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u521b\u5efa\u65b0\u7684\u5171\u4eab\u5185\u5b58\u6bb5&#xff0c;\u6216\u83b7\u53d6\u5df2\u5b58\u5728\u7684\u5171\u4eab\u5185\u5b58 ID&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>key&#xff1a;IPC \u952e\u503c&#xff08;ftok\u751f\u6210\u6216\u624b\u52a8\u6307\u5b9a&#xff0c;\u5982IPC_PRIVATE\u8868\u793a\u521b\u5efa\u79c1\u6709\u5171\u4eab\u5185\u5b58&#xff09;&#xff1b;<\/li>\n<li>size&#xff1a;\u5171\u4eab\u5185\u5b58\u7684\u5927\u5c0f&#xff08;\u5b57\u8282\u6570&#xff0c;\u5efa\u8bae\u6309\u9875\u5927\u5c0f\u5bf9\u9f50&#xff0c;\u5982 4096\u30018192&#xff0c;\u7cfb\u7edf\u9875\u5927\u5c0f\u7528getpagesize()\u83b7\u53d6&#xff09;\u6216\u8005\u7ec8\u7aef&#xff1a;getconf PAGESIZE&#xff1b;<\/li>\n<li>shmflg&#xff1a;\u6807\u5fd7\u4f4d&#xff08;\u7ec4\u5408\u4f7f\u7528&#xff09;&#xff1a;\n<ul>\n<li>IPC_CREAT&#xff1a;\u4e0d\u5b58\u5728\u5219\u521b\u5efa&#xff0c;\u5b58\u5728\u5219\u83b7\u53d6&#xff1b;<\/li>\n<li>IPC_EXCL&#xff1a;\u4e0eIPC_CREAT\u914d\u5408&#xff0c;\u82e5\u5df2\u5b58\u5728\u5219\u62a5\u9519&#xff08;\u786e\u4fdd\u521b\u5efa\u65b0\u5185\u5b58\u6bb5&#xff09;&#xff1b;<\/li>\n<li>\u6743\u9650\u4f4d&#xff1a;\u59820664&#xff08;\u540c\u6587\u4ef6\u6743\u9650&#xff0c;\u63a7\u5236\u8fdb\u7a0b\u5bf9\u5171\u4eab\u5185\u5b58\u7684\u8bfb\u5199&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>\u6210\u529f&#xff1a;\u8fd4\u56de\u5171\u4eab\u5185\u5b58 ID&#xff08;\u975e\u8d1f\u6574\u6570&#xff09;&#xff1b;<\/li>\n<li>\u5931\u8d25&#xff1a;\u8fd4\u56de-1&#xff08;\u5982\u6743\u9650\u4e0d\u8db3\u3001\u5185\u5b58\u5927\u5c0f\u975e\u6cd5&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>2.1.3 shmat&#xff08;\u6620\u5c04\u5171\u4eab\u5185\u5b58\u5230\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/shm.h&gt;<\/p>\n<p>void *shmat(int shmid, const void *shmaddr, int shmflg);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u5c06\u5185\u6838\u4e2d\u7684\u5171\u4eab\u5185\u5b58\u6bb5\u6620\u5c04\u5230\u5f53\u524d\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u7a7a\u95f4&#xff0c;\u8fd4\u56de\u53ef\u76f4\u63a5\u8bfb\u5199\u7684\u6307\u9488&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>shmid&#xff1a;\u5171\u4eab\u5185\u5b58 ID&#xff08;shmget\u8fd4\u56de\u503c&#xff09;&#xff1b;<\/li>\n<li>shmaddr&#xff1a;\u6307\u5b9a\u6620\u5c04\u5230\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740&#xff1a;\n<ul>\n<li>NULL&#xff1a;\u63a8\u8350\u7528\u6cd5&#xff0c;\u8ba9\u7cfb\u7edf\u81ea\u52a8\u9009\u62e9\u5408\u9002\u7684\u5730\u5740&#xff08;\u907f\u514d\u5730\u5740\u51b2\u7a81&#xff09;&#xff1b;<\/li>\n<li>\u975e\u7a7a&#xff1a;\u624b\u52a8\u6307\u5b9a\u5730\u5740&#xff08;\u9700\u786e\u4fdd\u5730\u5740\u5408\u6cd5&#xff0c;\u4e00\u822c\u4e0d\u63a8\u8350&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>shmflg&#xff1a;\u6620\u5c04\u5c5e\u6027&#xff1a;\n<ul>\n<li>0&#xff1a;\u9ed8\u8ba4&#xff0c;\u8bfb\u5199\u6743\u9650&#xff08;\u9700\u5171\u4eab\u5185\u5b58\u521b\u5efa\u65f6\u7684\u6743\u9650\u5141\u8bb8&#xff09;&#xff1b;<\/li>\n<li>SHM_RDONLY&#xff1a;\u53ea\u8bfb\u6743\u9650&#xff08;\u5373\u4f7f\u5171\u4eab\u5185\u5b58\u6709\u5199\u6743\u9650&#xff0c;\u4e5f\u53ea\u80fd\u8bfb&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>\u6210\u529f&#xff1a;\u8fd4\u56de\u6620\u5c04\u540e\u7684\u5185\u5b58\u8d77\u59cb\u5730\u5740&#xff08;void*&#xff0c;\u9700\u5f3a\u8f6c\u4e3a\u5bf9\u5e94\u7c7b\u578b\u4f7f\u7528&#xff09;&#xff1b;<\/li>\n<li>\u5931\u8d25&#xff1a;\u8fd4\u56de(void*)-1&#xff08;\u6ce8\u610f\u4e0d\u662f-1&#xff0c;\u9700\u7528(void*)-1\u5224\u65ad&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>2.1.4 shmdt&#xff08;\u89e3\u9664\u5171\u4eab\u5185\u5b58\u6620\u5c04&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/shm.h&gt;<\/p>\n<p>int shmdt(const void *shmaddr);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u5c06\u5171\u4eab\u5185\u5b58\u4ece\u5f53\u524d\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4\u4e2d\u89e3\u9664\u6620\u5c04&#xff08;\u4ec5\u65ad\u5f00\u8fde\u63a5&#xff0c;\u4e0d\u5220\u9664\u5171\u4eab\u5185\u5b58&#xff09;&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;shmaddr&#xff1a;shmat\u8fd4\u56de\u7684\u6620\u5c04\u5730\u5740&#xff1b;<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de0&#xff0c;\u5931\u8d25\u8fd4\u56de-1&#xff1b;<\/li>\n<li>\u5173\u952e&#xff1a;\u8fdb\u7a0b\u9000\u51fa\u524d\u5fc5\u987b\u89e3\u9664\u6620\u5c04&#xff0c;\u5426\u5219\u53ef\u80fd\u5bfc\u81f4\u5185\u5b58\u6cc4\u6f0f\u3002<\/li>\n<\/ul>\n<h4>2.1.5 shmctl&#xff08;\u63a7\u5236\u5171\u4eab\u5185\u5b58&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/shm.h&gt;<\/p>\n<p>int shmctl(int shmid, int cmd, struct shmid_ds *buf);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u5bf9\u5171\u4eab\u5185\u5b58\u6267\u884c\u67e5\u8be2\u3001\u4fee\u6539\u3001\u5220\u9664\u7b49\u64cd\u4f5c&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>shmid&#xff1a;\u5171\u4eab\u5185\u5b58 ID&#xff1b;<\/li>\n<li>cmd&#xff1a;\u63a7\u5236\u547d\u4ee4&#xff08;\u6838\u5fc3&#xff09;&#xff1a;\n<ul>\n<li>IPC_STAT&#xff1a;\u8bfb\u53d6\u5171\u4eab\u5185\u5b58\u5c5e\u6027&#xff08;\u5b58\u5165buf&#xff0c;\u540c\u6d88\u606f\u961f\u5217&#xff09;&#xff1b;<\/li>\n<li>IPC_SET&#xff1a;\u4fee\u6539\u5171\u4eab\u5185\u5b58\u5c5e\u6027&#xff08;\u4ecebuf\u8bfb\u53d6&#xff0c;\u4ec5\u80fd\u6539\u6743\u9650\u3001\u6240\u6709\u8005\u7b49&#xff09;&#xff1b;<\/li>\n<li>IPC_RMID&#xff1a;\u5220\u9664\u5171\u4eab\u5185\u5b58\u6bb5&#xff08;\u6700\u5e38\u7528&#xff0c;\u5220\u9664\u540e\u5185\u6838\u91ca\u653e\u8be5\u5185\u5b58&#xff09;&#xff1b;<\/li>\n<li>SHM_LOCK&#xff1a;\u9501\u5b9a\u5171\u4eab\u5185\u5b58&#xff08;\u7981\u6b62\u6362\u51fa\u5230\u4ea4\u6362\u5206\u533a&#xff0c;\u9700 root \u6743\u9650&#xff09;&#xff1b;<\/li>\n<li>SHM_UNLOCK&#xff1a;\u89e3\u9501\u5171\u4eab\u5185\u5b58&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>buf&#xff1a;\n<ul>\n<li>IPC_STAT\/IPC_SET&#xff1a;\u6307\u5411shmid_ds\u7ed3\u6784\u4f53&#xff08;\u5b58\u653e\u5c5e\u6027&#xff09;&#xff1b;<\/li>\n<li>IPC_RMID&#xff1a;\u4f20NULL\u5373\u53ef&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de0&#xff0c;\u5931\u8d25\u8fd4\u56de-1\u3002<\/li>\n<\/ul>\n<h2>3\u3001\u4fe1\u53f7\u706f<\/h2>\n<p>System V\u4fe1\u53f7\u706f\u662f\u591a\u4e2a\u4fe1\u53f7\u91cf\u7ec4\u6210\u7684\u6570\u7ec4&#xff0c;\u7528\u4e8e\u5b9e\u73b0\u8fdb\u7a0b\u95f4\u7684\u540c\u6b65 \/ \u4e92\u65a5&#xff08;\u5982\u4fdd\u62a4\u5171\u4eab\u5185\u5b58\u7684\u8bfb\u5199&#xff09;&#xff1b;\u5355\u4e2a\u4fe1\u53f7\u91cf\u662f\u4e00\u4e2a\u8ba1\u6570\u5668&#xff0c;\u901a\u8fc7P\/V\u64cd\u4f5c&#xff08;\u51cf 1 \/ \u52a0 1&#xff09;\u63a7\u5236\u8d44\u6e90\u8bbf\u95ee\u3002<\/p>\n<h3>3.1 \u51fd\u6570\u63a5\u53e3<\/h3>\n<h4>3.1.1 ftok&#xff08;\u540c\u6d88\u606f\u961f\u5217&#xff09;<\/h4>\n<h4>3.1.2 semget&#xff08;\u521b\u5efa \/ \u83b7\u53d6\u4fe1\u53f7\u91cf\u96c6&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/sem.h&gt;<\/p>\n<p>int semget(key_t key, int nsems, int semflg);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u521b\u5efa\u65b0\u7684\u4fe1\u53f7\u91cf\u96c6&#xff0c;\u6216\u83b7\u53d6\u5df2\u5b58\u5728\u7684\u4fe1\u53f7\u91cf\u96c6 ID&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>key&#xff1a;IPC \u952e\u503c&#xff08;ftok\u751f\u6210\u6216IPC_PRIVATE&#xff09;&#xff1b;<\/li>\n<li>nsems&#xff1a;\u4fe1\u53f7\u91cf\u96c6\u4e2d\u7684\u4fe1\u53f7\u91cf\u4e2a\u6570&#xff08;\u521b\u5efa\u65f6\u5fc5\u987b\u6307\u5b9a&#xff0c;\u83b7\u53d6\u65f6\u53ef\u586b 0&#xff09;&#xff1b;<\/li>\n<li>semflg&#xff1a;\u6807\u5fd7\u4f4d&#xff08;\u7ec4\u5408\u4f7f\u7528&#xff09;&#xff1a;\n<ul>\n<li>IPC_CREAT&#xff1a;\u4e0d\u5b58\u5728\u5219\u521b\u5efa&#xff0c;\u5b58\u5728\u5219\u83b7\u53d6&#xff1b;<\/li>\n<li>IPC_EXCL&#xff1a;\u4e0eIPC_CREAT\u914d\u5408&#xff0c;\u82e5\u5df2\u5b58\u5728\u5219\u62a5\u9519&#xff08;\u786e\u4fdd\u521b\u5efa\u65b0\u96c6&#xff09;&#xff1b;<\/li>\n<li>\u6743\u9650\u4f4d&#xff1a;\u59820664&#xff08;\u63a7\u5236\u8fdb\u7a0b\u5bf9\u4fe1\u53f7\u91cf\u96c6\u7684\u64cd\u4f5c\u6743\u9650&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>\u6210\u529f&#xff1a;\u8fd4\u56de\u4fe1\u53f7\u91cf\u96c6 ID&#xff08;\u975e\u8d1f\u6574\u6570&#xff09;&#xff1b;<\/li>\n<li>\u5931\u8d25&#xff1a;\u8fd4\u56de-1&#xff08;\u5982\u6743\u9650\u4e0d\u8db3\u3001nsems \u975e\u6cd5&#xff09;\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>3.1.3 semctl&#xff08;\u63a7\u5236\u4fe1\u53f7\u91cf\u96c6 \/ \u5355\u4e2a\u4fe1\u53f7\u91cf&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/sem.h&gt;<\/p>\n<p>int semctl(int semid, int semnum, int cmd, &#8230;);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u5bf9\u4fe1\u53f7\u91cf\u96c6 \/ \u5355\u4e2a\u4fe1\u53f7\u91cf\u6267\u884c\u521d\u59cb\u5316\u3001\u5220\u9664\u3001\u67e5\u8be2\u7b49\u64cd\u4f5c&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>semid&#xff1a;\u4fe1\u53f7\u91cf\u96c6 ID&#xff08;semget\u8fd4\u56de\u503c&#xff09;&#xff1b;<\/li>\n<li>semnum&#xff1a;\u4fe1\u53f7\u91cf\u96c6\u4e2d\u7684\u5355\u4e2a\u4fe1\u53f7\u91cf\u4e0b\u6807&#xff08;\u4ece 0 \u5f00\u59cb&#xff0c;\u64cd\u4f5c\u6574\u4e2a\u96c6\u65f6\u53ef\u586b 0&#xff09;&#xff1b;<\/li>\n<li>cmd&#xff1a;\u6838\u5fc3\u547d\u4ee4&#xff1a;<br \/>\n<table>\n<tr>\u547d\u4ee4\u529f\u80fd<\/tr>\n<tbody>\n<tr>\n<td>SETVAL<\/td>\n<td>\u8bbe\u7f6e\u5355\u4e2a\u4fe1\u53f7\u91cf\u7684\u521d\u59cb\u503c&#xff08;\u9700\u914d\u5408\u7b2c\u56db\u4e2a\u53c2\u6570union semun&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>GETVAL<\/td>\n<td>\u83b7\u53d6\u5355\u4e2a\u4fe1\u53f7\u91cf\u7684\u5f53\u524d\u503c&#xff08;\u8fd4\u56de\u503c\u4e3a\u4fe1\u53f7\u91cf\u503c&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>IPC_RMID<\/td>\n<td>\u5220\u9664\u6574\u4e2a\u4fe1\u53f7\u91cf\u96c6&#xff08;semnum \u65e0\u6548&#xff0c;\u7b2c\u56db\u4e2a\u53c2\u6570\u4f20 NULL&#xff0c;\u4e5f\u53ef\u7701\u7565&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>SETALL<\/td>\n<td>\u8bbe\u7f6e\u4fe1\u53f7\u91cf\u96c6\u4e2d\u6240\u6709\u4fe1\u53f7\u91cf\u7684\u521d\u59cb\u503c&#xff08;\u7b2c\u56db\u4e2a\u53c2\u6570\u4f20\u6570\u7ec4&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>GETALL<\/td>\n<td>\u83b7\u53d6\u4fe1\u53f7\u91cf\u96c6\u4e2d\u6240\u6709\u4fe1\u53f7\u91cf\u7684\u5f53\u524d\u503c&#xff08;\u7b2c\u56db\u4e2a\u53c2\u6570\u4f20\u6570\u7ec4&#xff09;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/li>\n<li>\u53ef\u53d8\u53c2\u6570&#xff08;&#8230;&#xff09;&#xff1a;\u9700\u4f20\u5165union semun\u7ed3\u6784\u4f53&#xff08;\u5fc5\u987b\u624b\u52a8\u5b9a\u4e49&#xff0c;\u7cfb\u7edf\u4e0d\u9ed8\u8ba4\u63d0\u4f9b&#xff09;&#xff1a;\n<p>\/\/ \u5fc5\u987b\u624b\u52a8\u5b9a\u4e49\u8be5\u8054\u5408\u4f53&#xff01;<br \/>\nunion semun {<br \/>\n    int val;                \/\/ SETVAL&#xff1a;\u5355\u4e2a\u4fe1\u53f7\u91cf\u7684\u521d\u59cb\u503c<br \/>\n    struct semid_ds *buf;   \/\/ IPC_STAT\/IPC_SET&#xff1a;\u4fe1\u53f7\u91cf\u96c6\u5c5e\u6027<br \/>\n    unsigned short *array;  \/\/ GETALL\/SETALL&#xff1a;\u6240\u6709\u4fe1\u53f7\u91cf\u7684\u503c\u6570\u7ec4<br \/>\n    struct seminfo *__buf;  \/\/ IPC_INFO&#xff1a;\u7cfb\u7edf\u9650\u5236&#xff08;Linux\u7279\u6709&#xff09;<br \/>\n};<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\n<ul>\n<li>\u6210\u529f&#xff1a;SETVAL\/IPC_RMID\u8fd4\u56de 0&#xff0c;GETVAL\u8fd4\u56de\u4fe1\u53f7\u91cf\u5f53\u524d\u503c&#xff1b;<\/li>\n<li>\u5931\u8d25&#xff1a;\u8fd4\u56de-1\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>3.1.4 semop&#xff08;\u6267\u884c P\/V \u64cd\u4f5c&#xff0c;\u6838\u5fc3&#xff09;<\/h4>\n<ul>\n<li>\u51fd\u6570\u539f\u578b&#xff1a;<\/li>\n<\/ul>\n<p>#include &lt;sys\/types.h&gt;<br \/>\n#include &lt;sys\/ipc.h&gt;<br \/>\n#include &lt;sys\/sem.h&gt;<\/p>\n<p>int semop(int semid, struct sembuf *sops, size_t nsops);<\/p>\n<ul>\n<li>\u529f\u80fd&#xff1a;\u5bf9\u4fe1\u53f7\u91cf\u96c6\u6267\u884c\u4e00\u7ec4\u539f\u5b50\u64cd\u4f5c&#xff08;P \u64cd\u4f5c \/ V \u64cd\u4f5c&#xff09;&#xff0c;\u786e\u4fdd\u64cd\u4f5c\u4e0d\u88ab\u4e2d\u65ad&#xff1b;<\/li>\n<li>\u53c2\u6570&#xff1a;\n<ul>\n<li>semid&#xff1a;\u4fe1\u53f7\u91cf\u96c6 ID&#xff1b;<\/li>\n<li>sops&#xff1a;\u6307\u5411struct sembuf\u7ed3\u6784\u4f53\u6570\u7ec4\u7684\u6307\u9488&#xff08;\u5b9a\u4e49\u64cd\u4f5c\u5217\u8868&#xff09;&#xff1a;\n<p>struct sembuf {<br \/>\n    unsigned short sem_num; \/\/ \u64cd\u4f5c\u7684\u4fe1\u53f7\u91cf\u4e0b\u6807&#xff08;\u4ece0\u5f00\u59cb&#xff09;<br \/>\n    short sem_op;           \/\/ \u64cd\u4f5c\u7c7b\u578b&#xff08;\u6838\u5fc3&#xff09;&#xff1a;<br \/>\n                            \/\/ -1&#xff1a;P\u64cd\u4f5c&#xff08;\u7533\u8bf7\u8d44\u6e90&#xff0c;\u4fe1\u53f7\u91cf\u51cf1&#xff0c;\u65e0\u8d44\u6e90\u5219\u963b\u585e&#xff09;<br \/>\n                            \/\/ &#043;1&#xff1a;V\u64cd\u4f5c&#xff08;\u91ca\u653e\u8d44\u6e90&#xff0c;\u4fe1\u53f7\u91cf\u52a01&#xff09;<br \/>\n                            \/\/ 0&#xff1a;\u7b49\u5f85\u4fe1\u53f7\u91cf\u503c\u53d8\u4e3a0<br \/>\n    short sem_flg;          \/\/ \u64cd\u4f5c\u6807\u5fd7&#xff1a;<br \/>\n                            \/\/ 0&#xff1a;\u9ed8\u8ba4&#xff0c;\u65e0\u8d44\u6e90\u5219\u963b\u585e<br \/>\n                            \/\/ IPC_NOWAIT&#xff1a;\u65e0\u8d44\u6e90\u5219\u4e0d\u963b\u585e&#xff0c;\u76f4\u63a5\u8fd4\u56de\u9519\u8bef<br \/>\n                            \/\/ SEM_UNDO&#xff1a;\u8fdb\u7a0b\u9000\u51fa\u65f6\u81ea\u52a8\u64a4\u9500\u672c\u6b21\u64cd\u4f5c&#xff08;\u907f\u514d\u6b7b\u9501&#xff09;<br \/>\n};<\/p>\n<\/li>\n<li>nsops&#xff1a;\u64cd\u4f5c\u5217\u8868\u7684\u957f\u5ea6&#xff08;\u5373sops\u6570\u7ec4\u7684\u5143\u7d20\u4e2a\u6570&#xff09;&#xff1b;<\/li>\n<\/ul>\n<\/li>\n<li>\u8fd4\u56de\u503c&#xff1a;\u6210\u529f\u8fd4\u56de0&#xff0c;\u5931\u8d25\u8fd4\u56de-1&#xff1b;<\/li>\n<li>\u6838\u5fc3\u7279\u6027&#xff1a;semop\u7684\u6240\u6709\u64cd\u4f5c\u662f\u539f\u5b50\u6027\u7684 \u2014\u2014 \u8981\u4e48\u5168\u90e8\u6267\u884c&#xff0c;\u8981\u4e48\u5168\u90e8\u4e0d\u6267\u884c&#xff08;\u907f\u514d\u7ade\u6001\u6761\u4ef6&#xff09;\u3002<\/li>\n<\/ul><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001\u6d88\u606f\u961f\u5217\u6d88\u606f\u961f\u5217\u662f Linux \u7cfb\u7edf\u4e2d\u4e00\u79cd\u57fa\u4e8e\u5185\u6838\u7684\u3001\u9762\u5411\u6570\u636e\u5757&#xff08;\u6d88\u606f&#xff09;\u7684\u5f02\u6b65 IPC \u673a\u5236&#xff0c;\u672c\u8d28\u662f\u5185\u6838\u7ef4\u62a4\u7684\u4e00\u4e2a\u6d88\u606f\u94fe\u8868&#xff0c;\u8fdb\u7a0b\u901a\u8fc7 API \u5411\u961f\u5217\u4e2d\u6dfb\u52a0 \/ \u8bfb\u53d6\u6d88\u606f&#xff0c;\u5b9e\u73b0\u8fdb\u7a0b\u95f4\u901a\u4fe1\u30021.1 IPC\u5bf9\u8c61\u6d88\u606f\u961f\u5217\u3001\u5171\u4eab\u5185\u5b58\u3001\u4fe1\u53f7\u91cf&#xff08;\u4fe1\u53f7\u706f&#xff09;\u90fd\u5c5e\u4e8eSystem V IPC \u5bf9\u8c61&#xff0c;\u5185\u6838\u4f1a\u4e3a\u6bcf\u4e2a IPC \u5bf9\u8c61\u7ef4\u62a4\u4e00\u4e2a\u72ec\u7acb\u7684\u5185\u6838\u6570\u636e\u7ed3\u6784&#xff08;\u800c\u975e \u201c\u5185\u5b58\u6587\u4ef6\u201d<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[8679,8681,8680,58,219,1155,6150],"topic":[],"class_list":["post-78518","post","type-post","status-publish","format-standard","hentry","category-server","tag-ipc","tag-8681","tag-8680","tag-linux","tag-219","tag-1155","tag-6150"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - 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