{"id":31514,"date":"2025-04-21T14:41:01","date_gmt":"2025-04-21T06:41:01","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/31514.html"},"modified":"2025-04-21T14:41:01","modified_gmt":"2025-04-21T06:41:01","slug":"%e5%9f%ba%e4%ba%8e%e4%bf%a1%e5%8f%b7%e9%87%8f%e4%b8%8e%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%e5%ae%9e%e7%8e%b0%e5%ae%a2%e6%88%b7%e4%b8%8e%e6%9c%8d%e5%8a%a1%e5%99%a8%e8%bf%9b%e7%a8%8b%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/31514.html","title":{"rendered":"\u57fa\u4e8e\u4fe1\u53f7\u91cf\u4e0e\u5171\u4eab\u5185\u5b58\u5b9e\u73b0\u5ba2\u6237\u4e0e\u670d\u52a1\u5668\u8fdb\u7a0b\u901a\u4fe1"},"content":{"rendered":"

\u57fa\u4e8e\u4fe1\u53f7\u91cf\u4e0e\u5171\u4eab\u5185\u5b58\u5b9e\u73b0\u5ba2\u6237\u4e0e\u670d\u52a1\u5668\u8fdb\u7a0b\u901a\u4fe1<\/h2>\n

\u53d1\u9001\u8fdb\u7a0b<\/h3>\n

\u4ee3\u7801<\/h4>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\n#<\/span>include<\/span> <stdlib.h><\/span><\/span>
\n#<\/span>include<\/span> <string.h><\/span><\/span>
\n#<\/span>include<\/span> <unistd.h><\/span><\/span>
\n#<\/span>include<\/span> <fcntl.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/mman.h><\/span><\/span>
\n#<\/span>include<\/span> <semaphore.h><\/span><\/span><\/p>\n

#<\/span>define<\/span> SHARED_MEM_NAME<\/span> "\/shared_mem"<\/span><\/span>
\n#<\/span>define<\/span> SEM_NAME<\/span> "\/sem_sync"<\/span><\/span>
\n#<\/span>define<\/span> MEM_SIZE<\/span> 1024<\/span><\/span><\/span>
\n#<\/span>define<\/span> END_STRING<\/span> "END"<\/span><\/span><\/p>\n

int<\/span> main<\/span>(<\/span>)<\/span> {<\/span>
\n int<\/span> shm_fd;<\/span>
\n void<\/span> *<\/span>shared_mem;<\/span>
\n sem_t *<\/span>sem;<\/span><\/p>\n

shm_fd =<\/span> shm_open<\/span>(<\/span>SHARED_MEM_NAME,<\/span> O_CREAT |<\/span> O_RDWR,<\/span> 0666<\/span>)<\/span>;<\/span>
\n if<\/span> (<\/span>shm_fd ==<\/span> –<\/span>1<\/span>)<\/span> {<\/span>
\n perror<\/span>(<\/span>"shm_open failed"<\/span>)<\/span>;<\/span>
\n exit<\/span>(<\/span>1<\/span>)<\/span>;<\/span>
\n }<\/span>
\n ftruncate<\/span>(<\/span>shm_fd,<\/span> MEM_SIZE)<\/span>;<\/span><\/p>\n

shared_mem =<\/span> mmap<\/span>(<\/span>0<\/span>,<\/span> MEM_SIZE,<\/span> PROT_WRITE,<\/span> MAP_SHARED,<\/span> shm_fd,<\/span> 0<\/span>)<\/span>;<\/span>
\n if<\/span> (<\/span>shared_mem ==<\/span> MAP_FAILED)<\/span> {<\/span>
\n perror<\/span>(<\/span>"mmap failed"<\/span>)<\/span>;<\/span>
\n exit<\/span>(<\/span>1<\/span>)<\/span>;<\/span>
\n }<\/span><\/p>\n

sem =<\/span> sem_open<\/span>(<\/span>SEM_NAME,<\/span> O_CREAT,<\/span> 0666<\/span>,<\/span> 0<\/span>)<\/span>;<\/span>
\n if<\/span> (<\/span>sem ==<\/span> SEM_FAILED)<\/span> {<\/span>
\n perror<\/span>(<\/span>"sem_open failed"<\/span>)<\/span>;<\/span>
\n exit<\/span>(<\/span>1<\/span>)<\/span>;<\/span>
\n }<\/span><\/p>\n

char<\/span> buffer[<\/span>MEM_SIZE]<\/span>;<\/span>
\n while<\/span> (<\/span>1<\/span>)<\/span> {<\/span>
\n printf<\/span>(<\/span>"\u8f93\u5165\u5b57\u7b26\u4e32："<\/span>)<\/span>;<\/span>
\n fgets<\/span>(<\/span>buffer,<\/span> MEM_SIZE,<\/span> stdin<\/span>)<\/span>;<\/span>
\n buffer[<\/span>strcspn<\/span>(<\/span>buffer,<\/span> "\\\\n"<\/span>)<\/span>]<\/span> =<\/span> 0<\/span>;<\/span> \/\/ \u53bb\u6389\u6362\u884c\u7b26<\/span><\/p>\n

strncpy<\/span>(<\/span>(<\/span>char<\/span> *<\/span>)<\/span>shared_mem,<\/span> buffer,<\/span> MEM_SIZE)<\/span>;<\/span><\/p>\n

sem_post<\/span>(<\/span>sem)<\/span>;<\/span><\/p>\n

if<\/span> (<\/span>strcmp<\/span>(<\/span>buffer,<\/span> END_STRING)<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>
\n break<\/span>;<\/span>
\n }<\/span>
\n }<\/span><\/p>\n

munmap<\/span>(<\/span>shared_mem,<\/span> MEM_SIZE)<\/span>;<\/span>
\n close<\/span>(<\/span>shm_fd)<\/span>;<\/span>
\n sem_close<\/span>(<\/span>sem)<\/span>;<\/span><\/p>\n

return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\u8be6\u7ec6\u89e3\u6790<\/h4>\n

0，\u5934\u6587\u4ef6\u4e0e\u5b8f\u5b9a\u4e49<\/p>\n

#<\/span>include<\/span> <stdio.h><\/span><\/span>
\n#<\/span>include<\/span> <stdlib.h><\/span><\/span>
\n#<\/span>include<\/span> <string.h><\/span><\/span>
\n#<\/span>include<\/span> <unistd.h><\/span><\/span>
\n#<\/span>include<\/span> <fcntl.h><\/span><\/span>
\n#<\/span>include<\/span> <sys\/mman.h><\/span><\/span>
\n#<\/span>include<\/span> <semaphore.h><\/span><\/span><\/p>\n

\u8fd9\u4e9b\u5934\u6587\u4ef6\u5305\u542b\u4e86\u7a0b\u5e8f\u4e2d\u4f7f\u7528\u7684\u6807\u51c6\u5e93\u548c\u7cfb\u7edf\u5e93：<\/p>\n