{"id":40021,"date":"2023-12-11T14:49:30","date_gmt":"2023-12-11T06:49:30","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=40021"},"modified":"2023-12-11T14:49:30","modified_gmt":"2023-12-11T06:49:30","slug":"%e8%af%b7%e4%bd%a0%e6%9d%a5%e8%af%b4%e4%b8%80%e4%b8%8b%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%e7%9b%b8%e5%85%b3api-%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e8%af%b7%e4%bd%a0%e6%9d%a5%e8%af%b4%e4%b8%80%e4%b8%8b%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%e7%9b%b8%e5%85%b3api-%ef%bc%9f\/","title":{"rendered":"\u8bf7\u4f60\u6765\u8bf4\u4e00\u4e0b\u5171\u4eab\u5185\u5b58\u76f8\u5173api \uff1f"},"content":{"rendered":"

“`” Linux\u5141\u8bb8\u4e0d\u540c\u8fdb\u7a0b\u8bbf\u95ee\u540c\u4e00\u4e2a\u903b\u8f91\u5185\u5b58\uff0c\u63d0\u4f9b\u4e86\u4e00\u7ec4API\uff0c\u5934\u6587\u4ef6\u5728sys\/shm.h\u4e2d\u3002<\/p>\n

1\uff09\u65b0\u5efa\u5171\u4eab\u5185\u5b58shmget<\/p>\n

int shmget(key_t key,size_t size,int shmflg);<\/p>\n

key\uff1a\u5171\u4eab\u5185\u5b58\u952e\u503c\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u5171\u4eab\u5185\u5b58\u7684\u552f\u4e00\u6027\u6807\u8bb0\u3002<\/p>\n

size\uff1a\u5171\u4eab\u5185\u5b58\u5927\u5c0f<\/p>\n

shmflag\uff1a\u521b\u5efa\u8fdb\u7a0b\u548c\u5176\u4ed6\u8fdb\u7a0b\u7684\u8bfb\u5199\u6743\u9650\u6807\u8bc6\u3002<\/p>\n

\u8fd4\u56de\u503c\uff1a\u76f8\u5e94\u7684\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u7b26\uff0c\u5931\u8d25\u8fd4\u56de-1<\/p>\n

2\uff09\u8fde\u63a5\u5171\u4eab\u5185\u5b58\u5230\u5f53\u524d\u8fdb\u7a0b\u7684\u5730\u5740\u7a7a\u95f4shmat<\/p>\n

void *shmat(int shm_id,const void *shm_addr,int shmflg);<\/p>\n

shm_id\uff1a\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u7b26<\/p>\n

shm_addr\uff1a\u6307\u5b9a\u5171\u4eab\u5185\u5b58\u8fde\u63a5\u5230\u5f53\u524d\u8fdb\u7a0b\u7684\u5730\u5740\uff0c\u901a\u5e38\u4e3a0\uff0c\u8868\u793a\u7531\u7cfb\u7edf\u6765\u9009\u62e9\u3002<\/p>\n

shmflg\uff1a\u6807\u5fd7\u4f4d<\/p>\n

\u8fd4\u56de\u503c\uff1a\u6307\u5411\u5171\u4eab\u5185\u5b58\u7b2c\u4e00\u4e2a\u5b57\u8282\u7684\u6307\u9488\uff0c\u5931\u8d25\u8fd4\u56de-1<\/p>\n

3\uff09\u5f53\u524d\u8fdb\u7a0b\u5206\u79bb\u5171\u4eab\u5185\u5b58shmdt<\/p>\n

int shmdt(const void *shmaddr);<\/p>\n

4\uff09\u63a7\u5236\u5171\u4eab\u5185\u5b58shmctl<\/p>\n

\u548c\u4fe1\u53f7\u91cf\u7684semctl\u51fd\u6570\u7c7b\u4f3c\uff0c\u63a7\u5236\u5171\u4eab\u5185\u5b58<\/p>\n

int shmctl(int shm_id,int command,struct shmid_ds *buf);<\/p>\n

shm_id\uff1a\u5171\u4eab\u5185\u5b58\u6807\u8bc6\u7b26<\/p>\n

command: \u6709\u4e09\u4e2a\u503c<\/p>\n

IPC_STAT:\u83b7\u53d6\u5171\u4eab\u5185\u5b58\u7684\u72b6\u6001\uff0c\u628a\u5171\u4eab\u5185\u5b58\u7684shmid_ds\u7ed3\u6784\u590d\u5236\u5230buf\u4e2d\u3002<\/p>\n

IPC_SET:\u8bbe\u7f6e\u5171\u4eab\u5185\u5b58\u7684\u72b6\u6001\uff0c\u628abuf\u590d\u5236\u5230\u5171\u4eab\u5185\u5b58\u7684shmid_ds\u7ed3\u6784\u3002<\/p>\n

IPC_RMID:\u5220\u9664\u5171\u4eab\u5185\u5b58<\/p>\n

buf\uff1a\u5171\u4eab\u5185\u5b58\u7ba1\u7406\u7ed3\u6784\u4f53\u3002<\/p>\n

<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"

“`” Linux\u5141\u8bb8\u4e0d\u540c\u8fdb\u7a0b\u8bbf\u95ee\u540c\u4e00\u4e2a\u903b\u8f91\u5185\u5b58\uff0c\u63d0\u4f9b\u4e86\u4e00\u7ec4API\uff0c\u5934\u6587\u4ef6\u5728sys\/s […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-40021","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/40021","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=40021"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/40021\/revisions"}],"predecessor-version":[{"id":40022,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/40021\/revisions\/40022"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=40021"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=40021"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=40021"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}