{"id":295983,"date":"2024-05-20T15:49:52","date_gmt":"2024-05-20T07:49:52","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/295983.html"},"modified":"2024-05-20T15:50:08","modified_gmt":"2024-05-20T07:50:08","slug":"c%e8%af%ad%e8%a8%80%e5%a6%82%e4%bd%95%e8%ae%a9%e7%a8%8b%e5%ba%8f%e4%b8%ad%e9%80%94%e5%81%9c%e6%ad%a21%e7%a7%92","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/295983.html","title":{"rendered":"c\u8bed\u8a00\u5982\u4f55\u8ba9\u7a0b\u5e8f\u4e2d\u9014\u505c\u6b621\u79d2"},"content":{"rendered":"

\"c\u8bed\u8a00\u5982\u4f55\u8ba9\u7a0b\u5e8f\u4e2d\u9014\u505c\u6b621\u79d2\"<\/p>\n

C\u8bed\u8a00\u4e2d\u4f7f\u7a0b\u5e8f\u4e2d\u9014\u505c\u6b621\u79d2\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528sleep()<\/code>\u51fd\u6570\u3001_sleep()<\/code>\u51fd\u6570\u3001nanosleep()<\/code>\u51fd\u6570\u3001usleep()<\/code>\u51fd\u6570\u3001\u5229\u7528time()<\/code>\u51fd\u6570\u548c\u5faa\u73af\u7ed3\u6784\u5b9e\u73b0\u5ef6\u65f6\u3001\u4ee5\u53ca\u4f7f\u7528clock()<\/code>\u51fd\u6570\u4e0eCLOCKS_PER_SEC<\/code>\u5e38\u91cf\u5b9e\u73b0\u7cbe\u786e\u505c\u987f\u3002<\/strong> \u6700\u5e38\u89c1\u548c\u8de8\u5e73\u53f0\u7684\u65b9\u6cd5\u662f\u4f7f\u7528sleep()<\/code>\u51fd\u6570\uff0c\u5b83\u4f1a\u8ba9\u5f53\u524d\u7ebf\u7a0b\u6682\u505c\u6267\u884c\u6307\u5b9a\u7684\u79d2\u6570\u3002<\/p>\n<\/p>\n

\u4ee5\u4e0b\u662f\u4f7f\u7528sleep()<\/code>\u51fd\u6570\u8ba9\u7a0b\u5e8f\u4e2d\u9014\u505c\u6b621\u79d2\u7684\u8be6\u7ec6\u63cf\u8ff0\uff1a<\/p>\n<\/p>\n

sleep()\u51fd\u6570<\/strong> \u7684\u5de5\u4f5c\u539f\u7406\u662f\u6302\u8d77\u5f53\u524d\u7ebf\u7a0b\u7684\u6267\u884c\u76f4\u5230\u6307\u5b9a\u7684\u79d2\u6570\u65f6\u95f4\u8fc7\u53bb\u3002\u5f53\u7a0b\u5e8f\u6267\u884c\u5230sleep()<\/code>\u51fd\u6570\u65f6\uff0cCPU\u5c06\u4e0d\u4f1a\u5904\u7406\u5f53\u524d\u7ebf\u7a0b\u7684\u4efb\u52a1\uff0c\u5e76\u4e14\u7ebf\u7a0b\u7684\u72b6\u6001\u4f1a\u53d8\u4e3a\u7761\u7720\u72b6\u6001\u3002\u8fd9\u6837\u5c31\u80fd\u4f7f\u7a0b\u5e8f\u6682\u505c\u8fd0\u884c\u6307\u5b9a\u7684\u65f6\u95f4\u3002\u5728\u5927\u591a\u6570\u5177\u6709POSIX\u6807\u51c6\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e2d\uff08\u4f8b\u5982\u57fa\u4e8eUNIX\u548cLinux\u7684\u7cfb\u7edf\uff09\uff0csleep()<\/code>\u51fd\u6570\u53ef\u76f4\u63a5\u4f7f\u7528\u3002\u5728Windows\u5e73\u53f0\u4e0a\uff0c\u53ef\u4ee5\u901a\u8fc7\u5305\u542b\u5934\u6587\u4ef6<windows.h><\/code>\u6765\u4f7f\u7528Sleep()<\/code>\u51fd\u6570\uff0c\u4f46\u6ce8\u610f\u5176\u53c2\u6570\u4e3a\u6beb\u79d2\uff0c\u56e0\u6b64\u9700\u4f20\u51651000\u6765\u6682\u505c1\u79d2\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u4f7f\u7528 sleep()<\/code> \u548c _sleep()<\/code><\/h2>\n<\/p>\n

\u6807\u51c6sleep()\u51fd\u6570<\/strong><\/h3>\n<\/p>\n

\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n

\u5728Unix\u6216Linux\u7cfb\u7edf\u4e2d\uff0c\u4f60\u901a\u5e38\u53ef\u4ee5\u5305\u542b\u5934\u6587\u4ef6 <unistd.h><\/code> \u6765\u8c03\u7528sleep()<\/code>\u51fd\u6570\u3002<\/p>\n<\/p>\n

#include <unistd.h><\/p>\n
int mAI<\/a>n() {<\/p>\n
    \/\/ \u6267\u884c\u7a0b\u5e8f\u7684\u76f8\u5173\u64cd\u4f5c<\/p>\n
    \/\/ \u8ba9\u7a0b\u5e8f\u6682\u505c1\u79d2<\/p>\n
    sleep(1);<\/p>\n
    \/\/ \u5ef6\u65f6\u4e4b\u540e\u7ee7\u7eed\u6267\u884c\u7a0b\u5e8f\u7684\u5269\u4f59\u90e8\u5206<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6ce8\u610f\u4e8b\u9879<\/h4>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0csleep()<\/code>\u51fd\u6570\u53ef\u80fd\u4f1a\u56e0\u4e3a\u4fe1\u53f7\u7684\u5e72\u6270\u800c\u63d0\u524d\u8fd4\u56de\uff0c\u5e76\u4e0d\u4e00\u5b9a\u4f1a\u786e\u5207\u5730\u6682\u505c1\u79d2\u3002<\/p>\n<\/p>\n
Windows\u4e13\u7528\u7684_sleep()\u51fd\u6570<\/strong><\/h3>\n<\/p>\n
\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n
\u5728Windows\u4e2d\uff0c\u4f7f\u7528<windows.h><\/code>\u5e93\u5934\u6587\u4ef6\u4e2d\u7684Sleep()<\/code>\u51fd\u6570\uff08\u6ce8\u610f\u662f\u5927\u5199S\uff09\uff0c\u4f20\u5165\u7684\u53c2\u6570\u5355\u4f4d\u662f\u6beb\u79d2\u3002<\/p>\n<\/p>\n
#include <windows.h><\/p>\n
int main() {<\/p>\n
    \/\/ \u6267\u884c\u7a0b\u5e8f\u7684\u76f8\u5173\u64cd\u4f5c<\/p>\n
    \/\/ \u8ba9\u7a0b\u5e8f\u6682\u505c1000\u6beb\u79d2\uff08\u53731\u79d2\uff09<\/p>\n
    Sleep(1000);<\/p>\n
    \/\/ \u5ef6\u65f6\u4e4b\u540e\u7ee7\u7eed\u6267\u884c\u7a0b\u5e8f\u7684\u5269\u4f59\u90e8\u5206<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528 nanosleep()<\/code> \u548c usleep()<\/code><\/h2>\n<\/p>\n
\u9ad8\u5206\u8fa8\u7387nanosleep()\u51fd\u6570<\/strong><\/h3>\n<\/p>\n
\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n
nanosleep()<\/code>\u51fd\u6570\u5141\u8bb8\u66f4\u9ad8\u7cbe\u5ea6\u7684\u5ef6\u65f6\u63a7\u5236\uff0c\u53ef\u4ee5\u6307\u5b9a\u7eb3\u79d2\u7ea7\u522b\u7684\u6682\u505c\u3002\u8fd9\u4e2a\u51fd\u6570\u540c\u6837\u5728POSIX\u89c4\u8303\u4e2d\u5b9a\u4e49\uff0c\u9700\u8981\u5305\u542b\u5934\u6587\u4ef6 <time.h><\/code>\u3002<\/p>\n<\/p>\n
#include <time.h><\/p>\n
int main() {<\/p>\n
    struct timespec req = {1, 0}; \/\/ 1\u79d2\uff0c0\u7eb3\u79d2<\/p>\n
    \/\/ \u8ba9\u7a0b\u5e8f\u6682\u505c1\u79d2<\/p>\n
    nanosleep(&req, NULL);<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6ce8\u610f\u4e8b\u9879<\/h4>\n<\/p>\n
nanosleep()<\/code>\u4e5f\u53ef\u80fd\u7531\u4e8e\u4fe1\u53f7\u7b49\u539f\u56e0\u63d0\u524d\u8fd4\u56de\uff0c\u800creq<\/code>\u4e2d\u8fd8\u4f1a\u5305\u542b\u672a\u4f11\u7720\u5b8c\u7684\u65f6\u95f4\u3002<\/p>\n<\/p>\n
\u5fae\u79d2\u7ea7\u522busleep()\u51fd\u6570<\/strong><\/h3>\n<\/p>\n
\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n
usleep()<\/code>\u51fd\u6570\u53ef\u4ee5\u505a\u5230\u5fae\u79d2\u7ea7\u522b\u7684\u6682\u505c\uff081\u79d2 = 1000000\u5fae\u79d2\uff09\u3002\u8fd9\u4e2a\u51fd\u6570\u5728\u8f83\u65b0\u7684POSIX\u89c4\u8303\u4e2d\u5df2\u7ecf\u88ab\u6807\u8bb0\u4e3a\u5e9f\u5f03\uff0c\u4f46\u5728\u65e7\u4ee3\u7801\u548c\u67d0\u4e9b\u7cfb\u7edf\u4e2d\u4ecd\u7136\u53ef\u4ee5\u4f7f\u7528\u3002\u9700\u8981\u5305\u542b\u5934\u6587\u4ef6 <unistd.h><\/code>\u3002<\/p>\n<\/p>\n
#include <unistd.h><\/p>\n
int main() {<\/p>\n
    \/\/ \u8ba9\u7a0b\u5e8f\u6682\u505c1000000\u5fae\u79d2\uff08\u53731\u79d2\uff09<\/p>\n
    usleep(1000000);<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u5229\u7528 time()<\/code> \u548c\u5faa\u73af\u7ed3\u6784<\/h2>\n<\/p>\n
\u57fa\u4e8etime()\u51fd\u6570\u7684\u5ef6\u65f6<\/strong><\/h3>\n<\/p>\n
\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n
\u53ef\u4ee5\u4f7f\u7528 time()<\/code> \u51fd\u6570\u6765\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\uff0c\u7136\u540e\u901a\u8fc7\u5faa\u73af\u7b49\u5f85\u76f4\u81f3\u8fc7\u53bb1\u79d2\u949f\u3002<\/p>\n<\/p>\n
#include <time.h><\/p>\n
int main() {<\/p>\n
    time_t start_time, curr_time;<\/p>\n
    \/\/ \u83b7\u53d6\u5f53\u524d\u65f6\u95f4<\/p>\n
    time(&start_time);<\/p>\n
    do {<\/p>\n
        \/\/ \u4e0d\u65ad\u83b7\u53d6\u5f53\u524d\u65f6\u95f4<\/p>\n
        time(&curr_time);<\/p>\n
    } while ((curr_time - start_time) < 1); \/\/ \u6301\u7eed\u5faa\u73af\u76f4\u5230\u8fc7\u53bb1\u79d2<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6ce8\u610f\u4e8b\u9879<\/h4>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u4f1a\u5360\u7528CPU\u8d44\u6e90\uff0c\u56e0\u4e3a\u5b83\u4e0d\u65ad\u5730\u5728\u68c0\u67e5\u65f6\u95f4\uff0c\u5e76\u4e14\u4e0d\u63a8\u8350\u5728\u5b9e\u65f6\u6027\u8981\u6c42\u8f83\u9ad8\u7684\u573a\u5408\u4f7f\u7528\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528 clock()<\/code> \u51fd\u6570\u4e0e CLOCKS_PER_SEC<\/code><\/h2>\n<\/p>\n
\u57fa\u4e8eclock()\u7684\u7cbe\u786e\u8ba1\u65f6<\/strong><\/h3>\n<\/p>\n
\u4f7f\u7528\u65b9\u6cd5<\/h4>\n<\/p>\n
clock()<\/code>\u51fd\u6570\u4e0eCLOCKS_PER_SEC<\/code>\u5e38\u91cf\u53ef\u4ee5\u5b9e\u73b0\u8f83\u4e3a\u7cbe\u786e\u7684\u7a0b\u5e8f\u6682\u505c\u529f\u80fd\uff0c\u7279\u522b\u9002\u5408\u4e8e\u9700\u8981\u8f83\u9ad8\u51c6\u786e\u6027\u7684\u7a0b\u5e8f\u4e2d\u3002<\/p>\n<\/p>\n
#include <time.h><\/p>\n
int main() {<\/p>\n
    clock_t start_clock = clock();<\/p>\n
    \/\/ \u7b49\u5f851\u79d2\u949f<\/p>\n
    while (((clock() - start_clock) \/ CLOCKS_PER_SEC) < 1);<\/p>\n
    return 0;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6ce8\u610f\u4e8b\u9879<\/h4>\n<\/p>\n
\u8fd9\u4e2a\u65b9\u6cd5\u4e0e\u57fa\u4e8etime()<\/code>\u51fd\u6570\u7684\u65b9\u6cd5\u76f8\u4f3c\uff0c\u4f46\u63d0\u4f9b\u4e86\u66f4\u9ad8\u7684\u7cbe\u5ea6\u3002\u4e0etime()<\/code>\u57fa\u4e8e\u5b9e\u9645\u65f6\u95f4\u7684\u5ef6\u8fdf\u4e0d\u540c\uff0cclock()<\/code>\u662f\u6839\u636e\u7a0b\u5e8f\u5360\u7528CPU\u7684\u8fd0\u884c\u65f6\u95f4\u6765\u8ba1\u7b97\u7684\u3002<\/p>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u7684\u65b9\u6cd5\uff0cC\u8bed\u8a00\u7a0b\u5e8f\u53ef\u4ee5\u5728\u4e2d\u9014\u5b9e\u73b01\u79d2\u7684\u505c\u987f\u3002\u5f00\u53d1\u8005\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u8981\u548c\u5e73\u53f0\u7684\u5dee\u5f02\uff0c\u9009\u62e9\u6700\u5408\u9002\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u7a0b\u5e8f\u7684\u77ed\u6682\u505c\u6b62\uff1f<\/strong><\/p>\n
\u8981\u5b9e\u73b0\u8ba9\u7a0b\u5e8f\u6682\u505c\u4e00\u79d2\u7684\u6548\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528C\u8bed\u8a00\u63d0\u4f9b\u7684<time.h>\u5934\u6587\u4ef6\u4e2d\u7684\u51fd\u6570\uff0c\u6bd4\u5982sleep()<\/code>\u51fd\u6570\u3002\u4f7f\u7528\u8fd9\u4e2a\u51fd\u6570\uff0c\u53ef\u4ee5\u8ba9\u7a0b\u5e8f\u5728\u6307\u5b9a\u7684\u65f6\u95f4\u5185\u6682\u505c\u6267\u884c\u3002\u5177\u4f53\u7684\u4ee3\u7801\u5982\u4e0b\uff1a <\/p>\n
#include <stdio.h>\n#include <time.h>\n\nint main() {\n   printf("\u5f00\u59cb\u6267\u884c\u7a0b\u5e8f\\n");\n   sleep(1); \/\/ \u6682\u505c\u4e00\u79d2\n   printf("\u7a0b\u5e8f\u5df2\u6062\u590d\u6267\u884c\\n");\n   return 0;\n}\n<\/code><\/pre>\n
2. \u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u5236\u9020\u4e00\u4e2a1\u79d2\u7684\u5ef6\u8fdf\u6548\u679c\uff1f<\/strong><\/p>\n
\u5982\u679c\u4f60\u60f3\u8ba9C\u8bed\u8a00\u7a0b\u5e8f\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u6682\u505c1\u79d2\u949f\uff0c\u53ef\u4ee5\u4f7f\u7528usleep()<\/code>\u51fd\u6570\u3002\u8be5\u51fd\u6570\u53ef\u4ee5\u4ee5\u5fae\u79d2\u4e3a\u5355\u4f4d\u6765\u6307\u5b9a\u5ef6\u8fdf\u65f6\u95f4\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
#include <stdio.h>\n#include <unistd.h>\n\nint main() {\n    printf("\u5f00\u59cb\u6267\u884c\u7a0b\u5e8f\\n");\n    usleep(1000000); \/\/ \u6682\u505c1\u79d2\uff081000000\u5fae\u79d2\uff09\n    printf("\u7a0b\u5e8f\u5df2\u6062\u590d\u6267\u884c\\n");\n    return 0;\n}\n<\/code><\/pre>\n
3. \u5728C\u8bed\u8a00\u4e2d\u5982\u4f55\u5b9e\u73b0\u7a0b\u5e8f\u7684\u6682\u505c1\u79d2\u949f\u7684\u6548\u679c\uff1f<\/strong><\/p>\n
C\u8bed\u8a00\u63d0\u4f9b\u4e86\u591a\u79cd\u51fd\u6570\u6765\u5b9e\u73b0\u7a0b\u5e8f\u7684\u5ef6\u8fdf\u6267\u884c\uff0c\u5176\u4e2d\u4e00\u79cd\u5e38\u7528\u7684\u662fclock()<\/code>\u51fd\u6570\u3002\u8fd9\u4e2a\u51fd\u6570\u53ef\u4ee5\u8fd4\u56de\u5f53\u524d\u7684\u65f6\u949f\u8ba1\u65f6\u6570\uff0c\u4ee5\u7cfb\u7edf\u65f6\u95f4\u4e3a\u5355\u4f4d\u3002\u901a\u8fc7\u5728\u7a0b\u5e8f\u4e2d\u4f7f\u7528clock()<\/code>\u51fd\u6570\u53ef\u4ee5\u5b9e\u73b0\u7a0b\u5e8f\u7684\u6682\u505c\u6548\u679c\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n
#include <stdio.h>\n#include <time.h>\n\nint main() {\n    printf("\u5f00\u59cb\u6267\u884c\u7a0b\u5e8f\\n");\n    clock_t start_time = clock(); \/\/ \u83b7\u53d6\u5f53\u524d\u7684\u65f6\u949f\u8ba1\u65f6\u6570\n    while ((clock() - start_time) \/ CLOCKS_PER_SEC < 1) {\n        \/\/ \u4ec0\u4e48\u90fd\u4e0d\u505a\uff0c\u7b49\u5f851\u79d2\u949f\n    }\n    printf("\u7a0b\u5e8f\u5df2\u6062\u590d\u6267\u884c\\n");\n    return 0;\n}\n<\/code><\/pre>\n
\u4ee5\u4e0a\u662f\u51e0\u79cd\u5728C\u8bed\u8a00\u4e2d\u5b9e\u73b0\u7a0b\u5e8f\u6682\u505c1\u79d2\u949f\u7684\u65b9\u6cd5\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u6700\u9002\u5408\u7684\u65b9\u6cd5\u6765\u5ef6\u8fdf\u7a0b\u5e8f\u7684\u6267\u884c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"C\u8bed\u8a00\u4e2d\u4f7f\u7a0b\u5e8f\u4e2d\u9014\u505c\u6b621\u79d2\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528sleep()\u51fd\u6570\u3001_sleep()\u51fd\u6570\u3001nanosleep( […]","protected":false},"author":3,"featured_media":296004,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/295983"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=295983"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/295983\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/296004"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=295983"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=295983"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=295983"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}