{"id":1436,"date":"2018-06-21T20:55:10","date_gmt":"2018-06-21T12:55:10","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=1436"},"modified":"2018-06-21T20:55:10","modified_gmt":"2018-06-21T12:55:10","slug":"%e8%bf%9b%e7%a8%8b%e9%97%b4%e9%80%9a%e4%bf%a1-%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98c","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/1436","title":{"rendered":"\u8fdb\u7a0b\u95f4\u901a\u4fe1-\u5171\u4eab\u5185\u5b58(C++)"},"content":{"rendered":"<div class=\"article\">\n<h1 class=\"title\">\u8fdb\u7a0b\u95f4\u901a\u4fe1-\u5171\u4eab\u5185\u5b58(C++)<\/h1>\n<div class=\"author\"><a class=\"avatar\" href=\"https:\/\/www.jianshu.com\/u\/4b5578d48f4e\"><img decoding=\"async\" src=\"https:\/\/upload.jianshu.io\/users\/upload_avatars\/1678715\/f400b1d8-58e3-4793-a19b-dda6e769a331.jpg?imageMogr2\/auto-orient\/strip|imageView2\/1\/w\/96\/h\/96\" alt=\"96\" \/><\/a><\/p>\n<div class=\"info\"><span class=\"name\"><a href=\"https:\/\/www.jianshu.com\/u\/4b5578d48f4e\">\u963f\u697c<\/a><\/span>\u00a0<a class=\"btn btn-success follow\"><i class=\"iconfont ic-follow\"><\/i>\u5173\u6ce8<\/a><\/p>\n<div class=\"meta\"><span class=\"publish-time\" title=\"\" data-toggle=\"tooltip\" data-placement=\"bottom\" data-original-title=\"\u6700\u540e\u7f16\u8f91\u4e8e 2017.12.10 01:07\">2017.08.12 15:22*<\/span>\u00a0<span class=\"wordage\">\u5b57\u6570 2295<\/span>\u00a0<span class=\"views-count\">\u9605\u8bfb 434<\/span><span class=\"comments-count\">\u8bc4\u8bba 0<\/span><span class=\"likes-count\">\u559c\u6b22 0<\/span><\/div>\n<\/div>\n<\/div>\n<div class=\"show-content\" data-note-content=\"\">\n<div class=\"show-content-free\">\n<p>\u524d\u9762\u6211\u4eec\u5df2\u7ecf\u5728<a href=\"https:\/\/www.jianshu.com\/p\/014b6bd0b4da\" target=\"_blank\" rel=\"noopener\">\u8fdb\u7a0b\u95f4\u901a\u4fe1-\u5171\u4eab\u5185\u5b58<\/a>\u8ba8\u8bba\u8fc7<strong>SytemV API<\/strong>\u53ca<strong>POSIX API<\/strong>\u7684\u5171\u4eab\u5185\u5b58\u5b9e\u73b0\uff0c\u7531\u4e8e\u662fC\u63a5\u53e3\uff0c\u6240\u4ee5\u5728\u4f7f\u7528\u4e0a\u4e0d\u662f\u90a3\u4e48\u65b9\u4fbf\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u4f7f\u7528<em>Boost<\/em>\u5e93\u6765\u770b\u4e0b\u5171\u4eab\u5185\u5b58\u7684\u76f8\u5173API\u53ca\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<p><strong>Boost.Interprocess<\/strong>\u662f<em>Boost<\/em>\u7684\u4e00\u4e2a\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u7c7b\u5e93\uff0c\u6211\u4eec\u8981\u7528\u5230\u7684\u5171\u4eab\u5185\u5b58\u5c31\u662f\u5b83\u7684\u5b9e\u73b0\u7c7b\uff0c\u5b83\u5206\u522b\u6709\u4ee5\u4e0b\u51e0\u79cd\u5e38\u7528\u5b9e\u73b0\uff1a<\/p>\n<ul>\n<li><code>boost::interprocess::shared_memory_object<\/code>\uff1a\u666e\u901a\u5171\u4eab\u5185\u5b58\u5bf9\u8c61<\/li>\n<li><code>boost::interprocess::windows_shared_memory<\/code>\uff1aWindows\u5e73\u53f0\u7684\u5171\u4eab\u5185\u5b58\u5bf9\u8c61<\/li>\n<li><code>boost::interprocess::mamaged_shared_memory<\/code>\uff1a\u81ea\u52a8\u6258\u7ba1\u7684\u5171\u4eab\u5185\u5b58\u5bf9\u8c61<\/li>\n<\/ul>\n<p>\u6211\u4eec\u8fd8\u4f1a\u7528\u5230\u4ee5\u4e0b\u51e0\u4e2a\u7c7b\u8fdb\u884c\u5171\u4eab\u5185\u5b58\u7684\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li><code>boost::interprocess::mapped_region<\/code>\uff1a\u6620\u5c04\u5171\u4eab\u5185\u5b58\u5230\u5f53\u524d\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u7684\u5bf9\u8c61<\/li>\n<li><code>boost::interprocess::allocator<\/code>\uff1a\u5171\u4eab\u5185\u5b58\u5206\u914d\u5668<\/li>\n<li><code>boost::interprocess::named_mutex<\/code>\uff1a\u547d\u540d\u4e92\u65a5\u5bf9\u8c61\uff0c\u5b58\u50a8\u5728\u64cd\u4f5c\u7cfb\u7edf<\/li>\n<li><code>boost::interprocess::interprocess_mutex<\/code>\uff1a\u533f\u540d\u4e92\u62c6\u5bf9\u8c61\uff0c\u5b58\u50a8\u5728\u5171\u4eab\u5185\u5b58<\/li>\n<li><code>boost::interprocess::named_condition<\/code>\uff1a\u547d\u540d\u6761\u4ef6\u53d8\u91cf<\/li>\n<li><code>boost::interprocess::interprocess_condition<\/code>\uff1a\u533f\u540d\u6761\u4ef6\u53d8\u91cf<\/li>\n<li><code>boost::interprocess::named_semaphore<\/code>\uff1a\u547d\u540d\u4fe1\u53f7\u91cf<\/li>\n<li><code>boost::interprocess::interprocess_semaphore<\/code>\uff1a\u533f\u540d\u4fe1\u53f7\u91cf<\/li>\n<li><code>boost::interprocess::file_lock<\/code>\uff1a\u6587\u4ef6\u9501<\/li>\n<\/ul>\n<h2>\u521b\u5efa\u5171\u4eab\u5185\u5b58<\/h2>\n<p>\u5148\u6765\u6bb5\u4ee3\u7801\uff0c\u4f7f\u7528<code>boost::interprocess::shared_memory_object<\/code>\u521b\u5efa\u4e00\u5757\u5171\u4eab\u5185\u5b58\uff0c\u5199\u5165\u6570\u636e\u540e\u5728\u53e6\u4e00\u7a0b\u5e8f\u4e2d\u8bfb\u53d6\u51fa\u6765\u3002<\/p>\n<pre class=\"hljs cpp\"><code class=\"cpp\"><span class=\"hljs-meta\">#<span class=\"hljs-meta-keyword\">include<\/span> <span class=\"hljs-meta-string\">&lt;boost\/interprocess\/shared_memory_object.hpp&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-meta-keyword\">include<\/span> <span class=\"hljs-meta-string\">&lt;boost\/interprocess\/mapped_region.hpp&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-meta-keyword\">include<\/span> <span class=\"hljs-meta-string\">&lt;iostream&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">(<span class=\"hljs-keyword\">int<\/span> argc, <span class=\"hljs-keyword\">char<\/span>** argv)<\/span> \r\n<\/span>{\r\n    boost::interprocess::<span class=\"hljs-function\">shared_memory_object <span class=\"hljs-title\">shdmem<\/span><span class=\"hljs-params\">(boost::interprocess::open_or_create,\r\n        <span class=\"hljs-string\">\"shm_data\"<\/span>, boost::interprocess::read_write)<\/span><\/span>;\r\n    shdmem.truncate(<span class=\"hljs-number\">1024<\/span>);\r\n    <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; shdmem.get_name() &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n    boost::interprocess::<span class=\"hljs-keyword\">offset_t<\/span> size;\r\n    <span class=\"hljs-keyword\">if<\/span> (shdmem.get_size(size)) \r\n    {\r\n        <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; size &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n    }\r\n    boost::interprocess::<span class=\"hljs-function\">mapped_region <span class=\"hljs-title\">region<\/span><span class=\"hljs-params\">(shdmem, boost::interprocess::read_write)<\/span><\/span>;\r\n    <span class=\"hljs-keyword\">char<\/span> *s = <span class=\"hljs-keyword\">static_cast<\/span>&lt;<span class=\"hljs-keyword\">char<\/span>*&gt;(region.get_address());\r\n    <span class=\"hljs-built_in\">strcpy<\/span>(s, <span class=\"hljs-string\">\"Hello, world!\"<\/span>);\r\n    boost::interprocess::<span class=\"hljs-function\">mapped_region <span class=\"hljs-title\">region2<\/span><span class=\"hljs-params\">(shdmem, boost::interprocess::read_only)<\/span><\/span>;\r\n    <span class=\"hljs-keyword\">char<\/span> *i2 = <span class=\"hljs-keyword\">static_cast<\/span>&lt;<span class=\"hljs-keyword\">char<\/span>*&gt;(region2.get_address());\r\n    <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; i2 &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n    boost::interprocess::shared_memory_object::remove(<span class=\"hljs-string\">\"shm_data\"<\/span>);\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p><code>boost::interprocess::shared_memory_object<\/code>\u63a5\u53d7\u4e09\u4e2a\u53c2\u6570\u8fdb\u884c\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u7684\u6784\u9020\uff0c\u7b2c\u4e00\u4e2a\u4e3a\u521b\u5efa\u7684\u6807\u5fd7\uff0c<code>boost::interprocess::open_or_create<\/code>\u6253\u5f00\u6216\u8005\u521b\u5efa\uff0c\u5373\u5982\u679c\u5b58\u5728\u5c31\u76f4\u63a5\u6253\u5f00\uff0c\u5426\u5219\u5c31\u521b\u5efa\u3002\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e3a\u5171\u4eab\u5185\u5b58\u7684\u540d\u79f0\uff0c\u7b2c\u4e09\u4e2a\u4e3a\u521b\u5efa\u6216\u6253\u5f00\u65f6\uff0c\u8bbe\u7f6e\u7684\u6743\u9650\uff0c\u6211\u4eec\u7528\u7684<code>boost::interprocess::read_write<\/code>\u8868\u793a\u76f4\u63a5\u62e5\u6709\u8bfb\u5199\u6743\u9650\u3002\u5728\u8fd9\u91cc\u7533\u8bf7\u5230\u7684\u5171\u4eab\u5185\u5b58\u5927\u5c0f\u9ed8\u8ba4\u662f\u4e3a0\u7684\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u8c03\u7528<code>truncate<\/code>\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5171\u4eab\u5185\u5b58\u5927\u5c0f\uff0c\u8fd9\u91cc\u6211\u4eec\u8bbe\u7f6e\u6210\u4e861024\u3002\u5176\u5b9e\u5982\u679c\u719f\u6089<strong>POSIX API<\/strong>\u7684\u8bdd\uff0c\u8fd9\u91cc\u548c<code>shm_open<\/code>\u3001<code>ftruncate<\/code>\u7684\u64cd\u4f5c\u662f\u4e00\u4e00\u5bf9\u5e94\u7684\uff0c\u5b83\u5e95\u5c42\u8c03\u7528\u7684\u5c31\u662f\u8fd9\u4e9b<strong>API<\/strong>\u3002\u901a\u8fc7<code>get_name<\/code>\u53ca<code>get_size<\/code>\u6211\u4eec\u53ef\u4ee5\u83b7\u53d6\u5230\u5171\u4eab\u5185\u5b58\u7684\u540d\u79f0\u53ca\u5927\u5c0f\u3002<\/p>\n<p><code>boost::interprocess::mapped_region<\/code>\u662f\u628a\u5171\u4eab\u5185\u5b58\u6620\u5c04\u5230\u5f53\u524d\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\uff0c\u540c\u65f6\u6307\u5b9a\u5bf9\u5b83\u7684\u64cd\u4f5c\u6743\u9650 \u3002\u6240\u4ee5\u7b2c\u4e00\u4e2a\u53c2\u6570\u4e3a\u5171\u4eab\u5185\u5b58\uff0c\u7b2c\u4e8c\u4e2a\u4e3a\u6743\u9650\u6807\u5fd7\uff0c\u6211\u4eec\u7528\u5230\u7684<code>read_only<\/code>\u5176\u5b9e\u5c31\u662f\u5c06\u5b83\u6620\u5c04\u4e3a\u53ea\u8bfb\u5185\u5b58\u3002\u6620\u5c04\u5230\u5f53\u524d\u8fdb\u7a0b\u5730\u5740\u7a7a\u95f4\u540e\uff0c\u901a\u8fc7<code>get_address<\/code>\u53ef\u4ee5\u4ee5\u5b57\u8282\u7684\u65b9\u5f0f\u8bbf\u95ee\u548c\u8bfb\u5199\u5171\u4eab\u5185\u5b58\uff0c\u4f8b\u5b50\u91cc\u7684\u7b2c\u4e00\u6b21\u6620\u5c04\u662f\u5f80\u5171\u4eab\u5185\u5b58\u5199\u5165\u4e86&#8221;Hello, world!&#8221;\uff0c\u7b2c\u4e8c\u6b21\u6620\u5c04\u662f\u8bfb\u53d6\u5171\u4eab\u5185\u5b58\u91cc\u7684\u5185\u5bb9\u3002<code>boost::interprocess::mapped_region<\/code>\u4f1a\u81ea\u52a8\u8c03\u7528\u5230<code>mmap<\/code>\u53ca<code>munmap<\/code>\u6765\u6620\u5c04\u53ca\u89e3\u9664\u6620\u5c04\u5171\u4eab\u5185\u5b58\u3002<\/p>\n<p><code>boost::interprocess::shared_memory_object::remove<\/code>\u662f\u7528\u6765\u79fb\u9664\u5171\u4eab\u5185\u5b58\u7684\uff0c\u53ea\u9700\u63d0\u4f9b\u5171\u4eab\u5185\u5b58\u7684\u540d\u79f0\u5373\u53ef\u3002\u5b83\u5bf9\u5e94\u7684\u5176\u5b9e\u5c31\u662f<code>shm_unlink<\/code>\u64cd\u4f5c\u3002<\/p>\n<h2>\u8fdb\u7a0b\u95f4\u901a\u4fe1<\/h2>\n<p>\u8fd8\u662f\u8bfb\u5199\u7684\u4f8b\u5b50\uff0c\u4e0d\u540c\u7684\u662f\uff0c\u8fd9\u6b21\u6211\u4eec\u5c06\u7528\u5230C++\u7684\u9762\u5411\u5bf9\u8c61\u7279\u6027\u6765\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u3002<\/p>\n<p>\u6bd4\u5982\u8fd9\u6b21\u6211\u4eec\u8981\u5728\u5171\u4eab\u5185\u5b58\u4e2d\u653e\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5728\u5199\u8fdb\u7a0b\u4e2d\u901a\u8fc7\u6807\u51c6\u8f93\u5165\u5199\u5165\uff0c\u5728\u8bfb\u8fdb\u7a0b\u4e2d\u901a\u8fc7\u6807\u51c6\u8f93\u51fa\u8bfb\u51fa\u3002<\/p>\n<h3>\u793a\u4f8b\u4ee3\u7801<\/h3>\n<ul>\n<li>\u8bfb\u7a0b\u5e8f\n<p><strong>shmread.cpp<\/strong><\/p>\n<pre class=\"hljs cpp\"><code class=\"cpp\"><span class=\"hljs-meta\">#<span class=\"hljs-meta-keyword\">include<\/span> <span class=\"hljs-meta-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-meta-keyword\">include<\/span> <span class=\"hljs-meta-string\">\"shmutils.h\"<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span>\r\n<\/span>{\r\n  <span class=\"hljs-keyword\">using<\/span> <span class=\"hljs-keyword\">namespace<\/span> boost::interprocess;\r\n\r\n  shm_remove remover;\r\n  mutex_remove mutex_remover;\r\n  condition_remove condition_remover;\r\n  <span class=\"hljs-keyword\">typedef<\/span> allocator&lt;<span class=\"hljs-keyword\">char<\/span>, managed_shared_memory::segment_manager&gt; CharAllocator;\r\n  <span class=\"hljs-keyword\">typedef<\/span> basic_string&lt;<span class=\"hljs-keyword\">char<\/span>, <span class=\"hljs-built_in\">std<\/span>::char_traits&lt;<span class=\"hljs-keyword\">char<\/span>&gt;, CharAllocator&gt; <span class=\"hljs-built_in\">string<\/span>;\r\n  <span class=\"hljs-keyword\">bool<\/span> running = <span class=\"hljs-literal\">true<\/span>;\r\n  <span class=\"hljs-function\">named_mutex <span class=\"hljs-title\">named_mtx<\/span><span class=\"hljs-params\">(open_or_create, MUTEX_KEY)<\/span><\/span>;\r\n  <span class=\"hljs-function\">named_condition <span class=\"hljs-title\">named_cnd<\/span><span class=\"hljs-params\">(open_or_create, CONDITION_KEY)<\/span><\/span>;\r\n  scoped_lock&lt;named_mutex&gt; lock(named_mtx);\r\n  <span class=\"hljs-function\">managed_shared_memory <span class=\"hljs-title\">segment<\/span><span class=\"hljs-params\">(open_or_create, SHM_KEY, SHM_SIZE)<\/span><\/span>;\r\n  <span class=\"hljs-keyword\">while<\/span> (running)\r\n  {\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"Reader notify.\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      named_cnd.notify_all();\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"Reader wait ...\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      named_cnd.wait(lock);\r\n      <span class=\"hljs-comment\">\/\/ read share memory    <\/span>\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"==========\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      <span class=\"hljs-built_in\">std<\/span>::pair&lt;<span class=\"hljs-built_in\">string<\/span> *, <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-keyword\">size_t<\/span>&gt; p = segment.find&lt;<span class=\"hljs-built_in\">string<\/span>&gt;(<span class=\"hljs-string\">\"Hello\"<\/span>);\r\n      <span class=\"hljs-keyword\">if<\/span> (p.first != <span class=\"hljs-literal\">NULL<\/span>)\r\n      {\r\n          <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"read string: [\"<\/span> &lt;&lt; *p.first &lt;&lt; <span class=\"hljs-string\">\"]\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n          <span class=\"hljs-keyword\">if<\/span> (*p.first == <span class=\"hljs-string\">\"end\"<\/span>) \r\n          {\r\n              running = <span class=\"hljs-literal\">false<\/span>;\r\n          }\r\n      }\r\n  }\r\n  named_cnd.notify_all();\r\n  <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u200b<\/li>\n<li>\u5199\u7a0b\u5e8f\n<p><strong>shmwrite.cpp<\/strong><\/p>\n<pre class=\"hljs cpp\"><code class=\"cpp\"><span class=\"hljs-meta\">#<span class=\"hljs-meta-keyword\">include<\/span> <span class=\"hljs-meta-string\">&lt;iostream&gt;<\/span><\/span>\r\n<span class=\"hljs-meta\">#<span class=\"hljs-meta-keyword\">include<\/span> <span class=\"hljs-meta-string\">\"shmutils.h\"<\/span><\/span>\r\n\r\n<span class=\"hljs-function\"><span class=\"hljs-keyword\">int<\/span> <span class=\"hljs-title\">main<\/span><span class=\"hljs-params\">()<\/span>\r\n<\/span>{\r\n  <span class=\"hljs-keyword\">using<\/span> <span class=\"hljs-keyword\">namespace<\/span> boost::interprocess;\r\n\r\n  shm_remove remover;\r\n  mutex_remove mutex_remover;\r\n  condition_remove condition_remover;\r\n  <span class=\"hljs-keyword\">typedef<\/span> allocator&lt;<span class=\"hljs-keyword\">char<\/span>, managed_shared_memory::segment_manager&gt; CharAllocator;\r\n  <span class=\"hljs-keyword\">typedef<\/span> basic_string&lt;<span class=\"hljs-keyword\">char<\/span>, <span class=\"hljs-built_in\">std<\/span>::char_traits&lt;<span class=\"hljs-keyword\">char<\/span>&gt;, CharAllocator&gt; <span class=\"hljs-built_in\">string<\/span>;\r\n  <span class=\"hljs-keyword\">bool<\/span> running = <span class=\"hljs-literal\">true<\/span>;\r\n  <span class=\"hljs-function\">named_mutex <span class=\"hljs-title\">named_mtx<\/span><span class=\"hljs-params\">(open_or_create, MUTEX_KEY)<\/span><\/span>;\r\n  <span class=\"hljs-function\">named_condition <span class=\"hljs-title\">named_cnd<\/span><span class=\"hljs-params\">(open_or_create, CONDITION_KEY)<\/span><\/span>;\r\n  scoped_lock&lt;named_mutex&gt; lock(named_mtx);\r\n  <span class=\"hljs-function\">managed_shared_memory <span class=\"hljs-title\">segment<\/span><span class=\"hljs-params\">(open_or_create, SHM_KEY, SHM_SIZE)<\/span><\/span>;\r\n  <span class=\"hljs-keyword\">while<\/span> (running)\r\n  {\r\n      <span class=\"hljs-comment\">\/\/ write share memory<\/span>\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"----------\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      <span class=\"hljs-built_in\">string<\/span> *s = segment.find_or_construct&lt;<span class=\"hljs-built_in\">string<\/span>&gt;(<span class=\"hljs-string\">\"Hello\"<\/span>)(<span class=\"hljs-string\">\"\"<\/span>, segment.get_segment_manager());\r\n      s-&gt;clear();\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"wait input: \"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cin<\/span> &gt;&gt; *s;\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"write string: [\"<\/span> &lt;&lt; *s &lt;&lt; <span class=\"hljs-string\">\"]\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      <span class=\"hljs-keyword\">if<\/span> (*s == <span class=\"hljs-string\">\"end\"<\/span>)\r\n      {\r\n          running = <span class=\"hljs-literal\">false<\/span>;\r\n      }\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"Writer notify.\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      named_cnd.notify_all();\r\n      <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">cout<\/span> &lt;&lt; <span class=\"hljs-string\">\"Writer wait ...\"<\/span> &lt;&lt; <span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">endl<\/span>;\r\n      named_cnd.wait(lock);\r\n  }\r\n  named_cnd.notify_all();\r\n  <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u200b<\/li>\n<li>\u6267\u884c\u7ed3\u679c\n<pre class=\"hljs shell\"><code class=\"shell\">alpine:~$ .\/shmread &amp;\r\nalpine:~$ Reader notify.\r\nReader wait ...\r\n\r\nalpine:~$ .\/shmwrite\r\n----------\r\nwait input: \r\nHelloABC   \r\nwrite string: [HelloABC]\r\nWriter notify.\r\nWriter wait ...\r\n==========\r\nread string: [HelloABC]\r\nReader notify.\r\nReader wait ...\r\n----------\r\nwait input: \r\nend\r\nwrite string: [end]\r\nWriter notify.\r\nWriter wait ...\r\n==========\r\nread string: [end]\r\n[1]+  Done                       .\/shmread\r\nalpine:~$ \r\n<\/code><\/pre>\n<\/li>\n<\/ul>\n<blockquote><p>\u5b8c\u6574\u4ee3\u7801\u53ef\u4ece\u6211\u7684<a href=\"https:\/\/link.jianshu.com\/?t=https:\/\/github.com\/wangqun2046\/IPCExample\/tree\/master\/SharedMemory\/boostapi\" target=\"_blank\" rel=\"nofollow noopener\">GitHub<\/a>\u83b7\u53d6\u3002<\/p><\/blockquote>\n<p>\u8fd9\u91cc\u6211\u4eec\u6709\u4f7f\u7528\u5230<code>boost::interprocess::managed_shared_memory<\/code>,\u00a0<code>boost::interprocess::allocator<\/code>,\u00a0<code>boost::interprocess::managed_shared_memory::segment_manager<\/code>,\u00a0<code>boost::interprocess::named_mutex<\/code>,\u00a0<code>boost::interprocess::named_condition<\/code>,\u00a0<code>boost::interprocess::scoped_lock<\/code>\u8fd9\u4e9b\u7c7b\uff0c\u6211\u4eec\u8be6\u7ec6\u5206\u6790\u4e0b\u5b83\u4eec\u5206\u522b\u53ef\u4ee5\u7528\u6765\u505a\u4ec0\u4e48\u3002<\/p>\n<h3>\u76f8\u5173API<\/h3>\n<ul>\n<li><code>boost::interprocess::managed_shared_memory<\/code>\n<p><code>managed_shared_memory<\/code>\u5373\u6258\u7ba1\u5171\u4eab\u5185\u5b58\uff0c\u76f8\u6bd4<code>shared_memory_object<\/code>\u66f4\u7b26\u5408\u6211\u4eec<strong>C++<\/strong>\u7684\u98ce\u683c\uff0c\u56e0\u4e3a\u524d\u8005\u53ea\u80fd\u6309\u5b57\u8282\u53bb\u8bfb\u5199\uff0c\u800c\u5b83\u53ef\u4ee5\u76f4\u63a5\u5199\u5165\u6216\u8bfb\u53d6\u5bf9\u8c61\uff0c\u5e76\u4e14\u9690\u85cf\u4e86\u76f8\u5173\u7684\u5b9e\u73b0\u7ec6\u8282\u3002\u6211\u4eec\u53ef\u4ee5\u5f88\u7075\u6d3b\u5730\u901a\u8fc7<em>key<\/em>\u548c\u7c7b\u578b\u5f80\u5171\u4eab\u5185\u5b58\u91cc\u5199\u5165\u6216\u8bfb\u53d6\u6570\u636e\uff0c\u4e0a\u9762\u7684\u4f8b\u5b50\u5c31\u662f\u5f80\u5171\u4eab\u5185\u5b58\u91cc\u8bfb\u5199<code>string<\/code>\u3002\u5f53\u7136\uff0c\u8fd9\u4e2a<code>string<\/code>\u5e76\u975e\u6807\u51c6\u5e93\u91cc\u7684<code>string<\/code>\uff0c\u800c\u662f<code>boost::container<\/code>\u91cc\u5b9e\u73b0\u7684<code>string<\/code>\uff0c\u76f8\u6bd4<strong>STL<\/strong>\u7684\u8981\u66f4\u7075\u6d3b\uff0c\u53ef\u4ee5\u6307\u5b9a\u66f4\u7075\u6d3b\u7684<code>allocator<\/code>\u3002\u6258\u7ba1\u5171\u4eab\u5185\u5b58\u9700\u8981\u4f7f\u7528contruct()\u51fd\u6570\uff0c\u63a5\u6536\u4e00\u4e2a\u6570\u636e\u7c7b\u578b\u4e3a\u6a21\u677f\u53c2\u6570\uff0c\u4ee5\u53ca\u4e00\u4e2a\u540d\u79f0\u7528\u6765\u8868\u793a\u5728\u5171\u4eab\u5185\u5b58\u4e2d\u521b\u5efa\u7684\u5bf9\u8c61\u3002\u6211\u4eec\u4f8b\u5b50\u4e2d\u7528\u7684\u662f\u81ea\u5b9a\u4e49<code>string<\/code>\u7c7b\u578b\uff0c<em>key<\/em>\u4e3a<code>Hello<\/code>\uff0c\u521d\u59cb\u503c\u4e3a\u7a7a\u3002\u5728\u8bfb\u8fdb\u7a0b\u91cc\uff0c\u4f7f\u7528<code>find<\/code>\u65b9\u6cd5\u6765\u67e5\u627e\u5bf9\u5e94\u7684<em>key<\/em>\u6765\u8fdb\u884c\u64cd\u4f5c\u3002<em>find<\/em>\u4f1a\u8fd4\u56de\u4e00\u4e2a<code>std::pair<\/code>\u5bf9\u8c61\uff0c<code>first<\/code>\u662f\u6307\u5411\u5bf9\u8c61\u7684\u6307\u9488\uff08\u6ca1\u627e\u5230\u65f6\u4e3a\u7a7a\uff09\uff0c<code>second<\/code>\u4e3a\u5bf9\u8c61\u4e2a\u6570\u3002\u7531\u4e8e\u6211\u4eec\u6ca1\u6709\u6784\u9020\u4e3a\u6570\u7ec4\uff0c\u6240\u4ee5<code>second<\/code>\u53ea\u4f1a\u662f0\u62161\u3002<\/li>\n<li><code>boost::interprocess::allocator<\/code>\n<p>\u53ef\u4ee5\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u8fdb\u884c\u5185\u5b58\u5206\u914d\u7684\u5206\u914d\u5668\uff0c\u5b83\u63a5\u6536\u4e00\u4e2a<code>SegmentManager<\/code>\u7684\u6a21\u677f\u53c2\u6570\uff0c\u5e76\u4e14\u5728\u6784\u9020\u51fd\u6570\u4e2d\u9700\u4f20\u5165\u5bf9\u5e94\u7684<code>SegmentManager<\/code>\uff0c\u8fd9\u91cc\u6211\u4eec\u5c31\u76f4\u63a5\u4f7f\u7528\u4e86<code>managed_shared_memory<\/code>\u5bf9\u8c61\u63d0\u4f9b\u7684<code>segment_manager<\/code>\u83b7\u53d6\u5230\u8be5\u5bf9\u8c61\u3002<\/li>\n<li><code>boost::interprocess::managed_shared_memory::segment_manager<\/code>\n<p>\u6258\u7ba1\u5185\u5b58\u6bb5\u7ba1\u7406\u5668\uff0c\u7528\u4e8e\u7ba1\u7406\u4f4d\u4e8e\u6258\u7ba1\u5171\u4eab\u5185\u5b58\u4e4b\u5185\u7684\u5185\u5b58\u3002\u6211\u4eec\u5728\u67e5\u627e\u53ca\u521b\u5efa\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u65f6\uff0c\u90fd\u9700\u8981\u63d0\u4f9b\u5bf9\u5e94\u7684<code>segment_manager<\/code>\u6765\u8ba9\u5e94\u7528\u7a0b\u5e8f\u77e5\u9053\u54ea\u4e2a\u6bb5\u7ba1\u7406\u5668\u5e94\u8be5\u88ab\u8bbf\u95ee\u3002<\/li>\n<li><code>boost::interprocess::named_mutex<\/code>\n<p>\u547d\u540d\u4e92\u65a5\u5bf9\u8c61\uff0c\u5176\u5b9e\u4e0e\u7ebf\u7a0b\u91cc\u7684\u4e92\u65a5\u5bf9\u8c61\u7c7b\u4f3c\uff0c\u53ea\u4e0d\u8fc7\u662f\u7528\u5728\u8fdb\u7a0b\u4e2d\u3002\u547d\u540d\u4e92\u65a5\u5bf9\u8c61\u7531\u7cfb\u7edf\u7ba1\u7406\uff0c\u76f4\u63a5\u901a\u8fc7\u540d\u5b57\u53ef\u4ee5\u67e5\u627e\u5230\u76f8\u5e94\u7684\u5bf9\u8c61\uff0c\u4e0e<code>interprocess_mutex<\/code>\u4e0d\u540c\u7684\u662f\u540e\u8005\u9700\u8981\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u6765\u8fdb\u884c\u8bbf\u95ee\u3002\u5b83\u6709<code>lock()<\/code>,\u00a0<code>unlock()<\/code>,\u00a0<code>try_lock()<\/code>\u7b49\u65b9\u6cd5\u3002<\/li>\n<li><code>boost::interprocess::named_condition<\/code>\n<p>\u547d\u540d\u6761\u4ef6\u5bf9\u8c61\uff0c\u4e0e\u7ebf\u7a0b\u91cc\u7684\u6761\u4ef6\u5bf9\u8c61\u7c7b\u4f3c\uff0c\u4e5f\u662f\u7528\u5728\u8fdb\u7a0b\u4e2d\u3002\u7531\u7cfb\u7edf\u7ba1\u7406\uff0c\u76f4\u63a5\u901a\u8fc7\u540d\u5b57\u53ef\u4ee5\u67e5\u627e\u5230\u76f8\u5e94\u7684\u5bf9\u8c61\u3002\u6709<code>wait()<\/code>,\u00a0<code>notify()<\/code>,\u00a0<code>notify_all()<\/code>\u7b49\u65b9\u6cd5\u3002<\/li>\n<li><code>boost::interprocess::scoped_lock<\/code>\n<p>\u81ea\u91ca\u653e\u9501\uff0c\u7528\u4e8e\u5305\u88c5\u4e92\u65a5\u9501\u4e00\u7c7b\u7684\u9501\u5728\u6790\u6784\u65f6\u8fdb\u884c\u81ea\u52a8\u91ca\u653e\u7ba1\u7406\u3002<\/li>\n<\/ul>\n<h2>\u603b\u7ed3<\/h2>\n<p>\u4f7f\u7528<code>boost::interprocess<\/code>\u7684\u5171\u4eab\u5185\u5b58\u5b9e\u73b0\u65f6\uff0c\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u4f7f\u7528\u5230\u9762\u5411\u5bf9\u8c61\u7684\u4e00\u4e9b\u9ad8\u7ea7\u7279\u5f81\u800c\u4e0d\u7528\u53bb\u5173\u5fc3\u5e95\u5c42\u5b9e\u73b0\u3002\u5b83\u5176\u5b9e\u662f\u57fa\u4e8e<strong>POSIX API<\/strong>\u6765\u5b9e\u73b0\u7684\u5171\u4eab\u5185\u5b58\u7ba1\u7406\uff0c\u901a\u8fc7\u66f4\u9ad8\u7ef4\u5ea6\u7684\u62bd\u8c61\u5e26\u6765\u4e86\u66f4\u4fbf\u6377\u7684\u4f7f\u7528\u65b9\u5f0f\u548c\u7075\u6d3b\u5ea6\u3002<\/p>\n<blockquote><p>\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/link.jianshu.com\/?t=https:\/\/wangqun.info\/2017\/08\/08\/%E8%BF%9B%E7%A8%8B%E9%97%B4%E9%80%9A%E4%BF%A1-%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%EF%BC%88C++%EF%BC%89\/\" target=\"_blank\" rel=\"nofollow noopener\">https:\/\/wangqun.info\/2017\/08\/08\/%E8%BF%9B%E7%A8%8B%E9%97%B4%E9%80%9A%E4%BF%A1-%E5%85%B1%E4%BA%AB%E5%86%85%E5%AD%98%EF%BC%88C++%EF%BC%89\/<\/a><\/p><\/blockquote>\n<\/div>\n<\/div>\n<\/div>\n<div id=\"free-reward-panel\" class=\"support-author\">\n<p>\u5c0f\u793c\u7269\u8d70\u4e00\u8d70\uff0c\u6765\u7b80\u4e66\u5173\u6ce8\u6211<\/p>\n<div class=\"btn btn-pay\">\u8d5e\u8d4f\u652f\u6301<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u8fdb\u7a0b\u95f4\u901a\u4fe1-\u5171\u4eab\u5185\u5b58(C++) \u963f\u697c\u00a0\u5173<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-1436","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=1436"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1436\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=1436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=1436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=1436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}