{"id":4386,"date":"2020-07-13T17:08:15","date_gmt":"2020-07-13T09:08:15","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=4386"},"modified":"2020-07-13T17:08:15","modified_gmt":"2020-07-13T09:08:15","slug":"boost-ipc%e5%85%b1%e4%ba%ab%e5%86%85%e5%ad%98%e7%9a%84%e4%bd%bf%e7%94%a8%e6%80%bb%e7%bb%93","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/4386","title":{"rendered":"Boost IPC\u5171\u4eab\u5185\u5b58\u7684\u4f7f\u7528\u603b\u7ed3\u00a0"},"content":{"rendered":"

\u539f\u6587\u5730\u5740<\/a><\/p>\n

 <\/p>\n

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\u5171\u4eab\u5185\u5b58\uff0c\u662f\u8fdb\u7a0b\u95f4\u6570\u636e\u4f20\u8f93\u7684\u65b9\u5f0f\u4e4b\u4e00\u3002\u6570\u636e\u53d1\u9001\u65b9\u5c06\u6570\u636e\u653e\u5165\u5171\u4eab\u5185\u5b58\u4e2d\uff0c\u6570\u636e\u63a5\u6536\u65b9\u5219\u4ece\u5171\u4eab\u5185\u5b58\u4e2d\u5c06\u6570\u636e\u8bfb\u51fa\uff0c\u8fdb\u800c\u5b8c\u6210\u6574\u4e2a\u6570\u636e\u7684\u4f20\u8f93\u3002\u5728Linux\u5e73\u53f0\u4e0b\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4e3a\u7528\u6237\u63d0\u4f9b\u4e86\u4e24\u5957\u5171\u4eab\u5185\u5b58\u7684\u63a5\u53e3\uff1a<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
System-V\u5171\u4eab\u5185\u5b58\u63a5\u53e3<\/td>\n<\/tr>\n
int shmget(\u2026)<\/td>\n\u521b\u5efa\u4e00\u5757\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
int shmat(\u2026)<\/td>\n\u9644\u63a5\u4e00\u5757\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
int shmdt(\u2026)<\/td>\n\u65ad\u63a5\u4e00\u5757\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
int shmctl(\u2026)<\/td>\n\u83b7\u53d6\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u4fe1\u606f\uff0c\u5220\u9664\u4e00\u5757\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
Posix\u5171\u4eab\u5185\u5b58\u63a5\u53e3<\/td>\n<\/tr>\n
int shm_open(\u2026)<\/td>\n\u521b\u5efaor\u6253\u5f00\u5171\u4eab\u5185\u5b58\u5bf9\u8c61<\/td>\n<\/tr>\n
int ftruncate(\u2026)<\/td>\n\u8bbe\u7f6e\u5171\u4eab\u5185\u5b58\u7684\u5927\u5c0f<\/td>\n<\/tr>\n
int fstat(\u2026)<\/td>\n\u83b7\u53d6\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u4fe1\u606f<\/td>\n<\/tr>\n
Int shm_unlink(\u2026)<\/td>\n\u5220\u9664\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
void *mmap(\u2026)<\/td>\n\u5c06\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u6620\u5c04\u5230\u672c\u5730\u8fdb\u7a0b\u7a7a\u95f4\u4e2d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5728Windows\u5e73\u53f0\u4e0b\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4e3a\u7528\u6237\u63d0\u4f9b\u7684\u5171\u4eab\u5185\u5b58\u63a5\u53e3\u4e3a\uff1a<\/p>\n\n\n\n\n\n\n\n\n
Windows\u5e73\u53f0\u5171\u4eab\u5185\u5b58\u63a5\u53e3<\/td>\n<\/tr>\n
HANDLE CreateFileMapping(\u2026)<\/td>\n\u521b\u5efa\u4e00\u5757\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
HANDLE OpenFileMapping(\u2026)<\/td>\n\u9644\u63a5\u4e00\u5757\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
void *MapViewOfFile(\u2026)<\/td>\n\u5c06\u5171\u4eab\u5185\u5b58\u6620\u5c04\u5230\u672c\u5730\u8fdb\u7a0b\u7a7a\u95f4\u4e2d<\/td>\n<\/tr>\n
void UnmapViewOfFile(\u2026)<\/td>\n\u91ca\u653e\u5171\u4eab\u5185\u5b58<\/td>\n<\/tr>\n
void CloseHandle(\u2026)<\/td>\n\u5173\u95ed\u5171\u4eab\u5185\u5b58\u6620\u5c04\u6587\u4ef6\u53e5\u67c4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e0d\u540c\u5e73\u53f0\u63d0\u4f9b\u4e86\u4e0d\u540c\u7684\u5171\u4eab\u5185\u5b58\u4f7f\u7528\u63a5\u53e3\u3002C++ Boost\u5e93\u5bf9\u4e24\u7c7b\u5e73\u53f0\u7684\u5171\u4eab\u5185\u5b58\u63a5\u53e3\u548c\u4f7f\u7528\u65b9\u5f0f\u63d0\u4f9b\u4e86\u8fdb\u4e00\u6b65\u62bd\u8c61\u548c\u5c01\u88c5\uff0c\u5e76\u5c06\u8be5\u90e8\u5206\u529f\u80fd\u653e\u7f6e\u5728interprocess\u5e93\u4e2d\u3002\u5b8c\u6574\u7684interprocess\u5e93\u4ecb\u7ecd\u53ef\u53c2\u8003\uff1ahttp:\/\/www.boost.org\/doc\/libs\/1_57_0\/doc\/html\/interprocess.html<\/p>\n

\u8fd9\u91cc\u6211\u901a\u8fc7\u4f7f\u7528\u573a\u666f\u7684\u65b9\u5f0f\u7b80\u5355\u603b\u7ed3boost::interprocess share_memory\u7684\u4f7f\u7528<\/p>\n

\u4e00\u3001\u5171\u4eab\u5185\u5b58\u6c60\u7684\u521b\u5efa\u53ca\u9500\u6bc1<\/h1>\n

\u5728\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u4e4b\u524d\uff0c\u6211\u4eec\u90fd\u9700\u8981\u521b\u5efa\u4e00\u5757\u5171\u4eab\u5185\u5b58\u3002\u76f4\u63a5\u4f7f\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684\u5171\u4eab\u5185\u5b58\uff0c\u5219\u5728\u4e0d\u540c\u7684\u5e73\u53f0\u8c03\u7528\u6307\u5b9a\u63a5\u53e3\u5373\u53ef\u3002Boost::ipc\uff0c\u5219\u9700\u8981\u9996\u5148\u521b\u5efa\u4e00\u4e2a\u6258\u7ba1\u5171\u4eab\u5185\u5b58\u6c60\uff0c\u6240\u6709\u7684\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\uff0c\u90fd\u57fa\u4e8e\u8be5\u5185\u5b58\u6c60\u6765\u5206\u914d\u5185\u5b58\u3002
\n\u672c\u6587\u63cf\u8ff0\u7684\u4f7f\u7528\u573a\u666f\u4e3b\u8981\u4f9d\u8d56\u4e0b\u8ff0\u5934\u6587\u4ef6\uff1a<\/p>\n

#include<\/span> <boost\/interprocess\/managed_shared_memory.hpp><\/span><\/span>\r\n#include<\/span> <boost\/interprocess\/shared_memory_object.hpp><\/span><\/span>\r\n#include<\/span> <boost\/interprocess\/allocators\/allocator.hpp><\/span><\/span>\r\n\r\nnamespace<\/span> bip = boost::interprocess;<\/code><\/pre>\n
\u5171\u4eab\u5185\u5b58\u6c60\u7684\u521b\u5efa\uff1a<\/p>\n
static<\/span> char<\/span> *shareMemoryBlockName = \"MySharedMemory\"<\/span>;\r\nstatic<\/span> int32_t<\/span> sharedMemoryBlockTotalSize = 65536<\/span>;  \r\n\r\n\/\/\u521b\u5efa\u5171\u4eab\u5185\u5b58<\/span>\r\nbip::managed_shared_memory segment<\/span>(bip::create_only,\r\n\tshareMemoryBlockName,  \/\/segment name<\/span>\r\n\tsharedMemoryBlockTotalSize)<\/span><\/span>;\r\n<\/code><\/pre>\n
\u5171\u4eab\u5185\u5b58\u7684\u9644\u63a5\uff1a<\/p>\n
\/\/\u9996\u5148attach\u5171\u4eab\u5185\u5b58<\/span>\r\n\/\/\u9996\u5148\u9700\u8981attach\u5230share memory block<\/span>\r\nbip::managed_shared_memory segment<\/span>(bip::open_only,\r\n\tshareMemoryBlockName  \/\/segment name<\/span>\r\n\t)<\/span><\/span>;<\/code><\/pre>\n
\u5bf9\u5e94\u7684\uff0c\u5171\u4eab\u5185\u5b58\u6c60\u540d\u79f0\uff0c\u5c06\u5171\u4eab\u5185\u5b58\u6c60\u5220\u9664\uff1a<\/p>\n
\/\/\u540c\u65f6\u9500\u6bc1\u5171\u4eab\u5185\u5b58<\/span>\r\nbool<\/span> isRemoved = bip::shared_memory_object::remove(shareMemoryBlockName);\r\nif<\/span> (isRemoved)\r\n{\r\n\tcout<\/span> << \"Share Memory=[\"<\/span> << shareMemoryBlockName << \"] removed!\"<\/span> << endl<\/span>;\r\n}\r\nelse<\/span>\r\n{\r\n\tcout<\/span> << \"Share Memory=[\"<\/span> << shareMemoryBlockName << \"] not removed!\"<\/span> << endl<\/span>;\r\n}\r\n<\/code><\/pre>\n
\u3010\u6ce8\u3011<\/strong>\uff1a\u4f7f\u7528\u65f6\u9700\u786e\u4fddsegemnt\u5bf9\u8c61\u6574\u4e2a\u751f\u547d\u5468\u671f\u7684\u5b8c\u6574\u6027\uff0c\u4e0d\u80fd\u5728segement\u5df2\u7ecf\u6790\u6784\u540e\uff0c\u8fd8\u4f7f\u7528\u7531\u8be5\u5171\u4eab\u5185\u5b58\u6c60\u521b\u5efa\u7684\u5bf9\u8c61\u3002<\/p>\n
\u4e8c\u3001\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u7684\u521b\u5efa\u53ca\u9500\u6bc1<\/h1>\n
\u5728\u5171\u4eab\u5185\u5b58\u6c60\u521b\u5efa\u597d\u4e4b\u540e\uff0c\u5219\u53ef\u4ee5\u57fa\u4e8e\u5171\u4eab\u5185\u5b58\u6c60\u521b\u5efa\u5bf9\u8c61\u3002\u5728\u5171\u4eab\u5185\u5b58\u6c60\u4e0a\u53ef\u521b\u5efa\u6709\u540d\/\u65e0\u540d\u5bf9\u8c61\uff1a<\/p>\n
1.\u00a0\u6709\u540d\u5bf9\u8c61\u7684\u521b\u5efa\u3001\u9644\u63a5\u3001\u5220\u9664<\/h2>\n
\u6709\u540d\u5bf9\u8c61\u7684\u521b\u5efa\u65f6\uff0c\u9700\u8981\u7ed9\u8be5\u5bf9\u8c61\u5206\u914d\u6307\u5b9a\u7684\u5bf9\u8c61\u540d\u79f0<\/p>\n
\/\/bip::managed_shared_memory segment<\/span>\r\n\r\n\/\/\u6709\u540d\u5bf9\u8c61\u7684\u521b\u5efa<\/span>\r\nMyType *instance = segment.construct<MyType>  \r\n         (\"MyType instance\"<\/span>)  \/\/name of the object  <\/span>\r\n         (0.0<\/span>, 0<\/span>);            \/\/ctor first argument <\/span><\/code><\/pre>\n
\u521b\u5efa\u6709\u540d\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u7684\u597d\u5904\u662f\uff0c\u5176\u4ed6\u8fdb\u7a0b\u53ef\u4ee5\u901a\u8fc7\u8be5\u5bf9\u8c61\u540d\u79f0\uff0c\u57fa\u4e8e\u540c\u4e00\u4e2a\u5171\u4eab\u5185\u5b58\u6c60\uff0c\u65b9\u4fbf\u7684\u5b9a\u4f4d\u5230\u8be5\u5bf9\u8c61\u3002\u5bf9\u5e94\u7684\u9700\u8981\u9644\u63a5\u5230\u8be5\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\uff0c\u5219\u53ea\u9700\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u6c60\u627e\u5230\u6307\u5b9a\u547d\u540d\u5bf9\u8c61\uff1a<\/p>\n
\/\/bip::managed_shared_memory segment<\/span>\r\n\r\n\/\/\u6709\u540d\u5bf9\u8c61\u7684\u9644\u63a5<\/span>\r\ntypedef<\/span> std<\/span>::pair<MyType *, bip::managed_shared_memory::size_type> ResultT;\r\nResultT res = segment.find<MyType>(\"MyType instance\"<\/span>);\r\nif<\/span> (!res.second)\r\n{\r\n\tcout<\/span> << \"could not find MyType instance\"<\/span> << endl<\/span>;\r\n}<\/code><\/pre>\n
\u6709\u540d\u5bf9\u8c61\u7684\u5220\u9664\uff0c\u5219\u901a\u8fc7\u8c03\u7528destroy\u63a5\u53e3\u5b8c\u6210\u5220\u9664\u52a8\u4f5c\uff1a<\/p>\n
\/\/bip::managed_shared_memory segment<\/span>\r\n\r\n\/\/\u6709\u540d\u5bf9\u8c61\u7684\u5220\u9664<\/span>\r\nsegment.destroy<MyType>(\"MyType instance\"<\/span>);<\/code><\/pre>\n
2.\u00a0\u533f\u540d\u5bf9\u8c61\u7684\u521b\u5efa\u3001\u4f7f\u7528\u53ca\u9500\u6bc1<\/h2>\n
2.1\u00a0\u57fa\u4e8e\u504f\u79fb\u6307\u9488\u7684\u5171\u4eab\u6570\u636e\u4f7f\u7528<\/h3>\n
\u5927\u591a\u6570\u65f6\u5019\uff0c\u6211\u4eec\u5176\u5b9e\u4e0d\u6253\u7b97\u4f7f\u7528\u6709\u540d\u5bf9\u8c61\uff0c\u800c\u662f\u4f7f\u7528\u65e0\u540d\u5bf9\u8c61\uff0c\u6b64\u65f6\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528\u5171\u4eab\u5185\u5b58\u6c60\u63d0\u4f9b\u7684\u533f\u540d\u5bf9\u8c61\u6267\u884c\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u7684\u521b\u5efa\uff1a<\/p>\n
\/\/bip::managed_shared_memory segment<\/span>\r\n\r\n\/\/\u533f\u540d\u5bf9\u8c61\u7684\u521b\u5efa<\/span>\r\nMyType *ptr = segment.construct<MyType>(bip::anonymous_instance) (par1, par2...);  <\/code><\/pre>\n
\u7531\u4e8e\u533f\u540d\u5bf9\u8c61\u65e0\u6cd5\u901a\u8fc7\u540d\u79f0\u6307\u5b9a\u5b9a\u4f4d\uff0c\u56e0\u6b64\uff0c\u5f53\u6211\u4eec\u5c06\u4e00\u4e2a\u533f\u540d\u5bf9\u8c61\u7531\u8fdb\u7a0bA\u5199\u5165\u5171\u4eab\u5185\u5b58\u65f6\uff0c\u8fdb\u7a0bB\u6ca1\u6cd5\u76f4\u63a5\u62ff\u5230\u5171\u4eab\u5185\u5b58\uff0c\u8fdb\u800c\u4f7f\u7528\u3002Boost::interprocess\u63d0\u4f9b\u4e86\u65b9\u6cd5\u6765\u4f7f\u5f97\u8fdb\u7a0bB\u80fd\u591f\u83b7\u53d6\u533f\u540d\u5bf9\u8c61\u7684\u5185\u5bb9\u3002\u5177\u4f53\u505a\u6cd5\u662f\uff1a\u4f7f\u7528boost::interprocess::offset_ptr\u3002\u6211\u4eec\u5728\u5171\u4eab\u5185\u5b58\u4e2d\u521b\u5efa\u533f\u540d\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\uff0c\u901a\u8fc7offset_ptr\u6307\u5411\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u3002\u5c06offset_ptr\u7531\u8fdb\u7a0bA\u53d1\u9001\u5230\u8fdb\u7a0bB\uff0c\u8fdb\u7a0bB\u518d\u901a\u8fc7offset_ptr\u5c06\u5b9e\u9645\u5185\u5bb9\u8bfb\u51fa\u6765\u3002\u7531\u4e8eoffset_ptr\u6307\u5411\u7684\u5bf9\u8c61\u662f\u5b58\u653e\u5728\u5171\u4eab\u5185\u5b58\u4e2d\uff0c\u56e0\u6b64\uff0c\u5bf9\u5e94\u7684\u5bf9\u8c61\u5e94\u5f53\u5177\u5907\u4ece\u5171\u4eab\u5185\u5b58\u4e2d\u5206\u914d\u5185\u5b58\u7a7a\u95f4\u7684\u80fd\u529b\uff0c\u4e5f\u5c31\u662f\u8bf4\u8be5\u5bf9\u8c61\u7684\u5185\u5b58\u5206\u914d\u5668\u5e94\u9053\u6307\u5411\u5bf9\u5e94\u5171\u4eab\u5185\u5b58\u7684\u5185\u5b58\u5206\u914d\u5668\u3002<\/p>\n
#include<\/span> <boost\/interprocess\/managed_shared_memory.hpp><\/span><\/span>\r\n#include<\/span> <boost\/interprocess\/allocators\/allocator.hpp><\/span><\/span>\r\n#include<\/span> <boost\/interprocess\/containers\/string.hpp><\/span><\/span>\r\n\r\nnamespace<\/span> bip = boost::interprocess;   \/\/\u7ed9ipc\u8bbe\u7f6e\u522b\u540d<\/span>\r\n\r\n\/\/\u9996\u5148\u5b9a\u4e49\u5171\u4eab\u5185\u5b58\u5206\u914d\u5668\u7c7b\u578b<\/span>\r\ntypedef<\/span> bip::allocator<char<\/span>, bip::managed_shared_memory::segment_manager> CharAllocator;\r\ntypedef<\/span> bip::basic_string<char<\/span>, std<\/span>::char_traits<char<\/span>>, CharAllocator> shared_string;\r\n\r\nstruct<\/span> IPCData<\/span>\r\n{<\/span>\r\n\tshared_string name;\r\n\tint<\/span>       id;\r\n\tboost::atomic<int<\/span>> atomicShrMmOrderRefCnt;\r\n\r\n\tIPCData(const<\/span> shared_string::allocator_type& al):name(al),atomicShrMmOrderRefCnt(1<\/span>)\r\n\t{\r\n\t\tid = 0<\/span>;\r\n\t}\r\n\r\n};\r\n\r\n\/\/\u5b9a\u4e49\u6570\u636e\u7684OffsetPtr<\/span>\r\ntypedef<\/span> bip::offset_ptr<IPCData> IPCDataOffsetPtrT;\r\n\r\n\/\/\u5b9a\u4e49\u8be5offsetPtr\u7684\u5185\u5b58\u5206\u914d\u5668<\/span>\r\ntypedef<\/span> bip::allocator<IPCDataOffsetPtrT, bip::managed_shared_memory::segment_manager>IPCDataOffsetPtrAllocatorT;\r\n<\/code><\/pre>\n
\u5b9a\u4e49\u597d\u5bf9\u5e94\u7684\u504f\u79fb\u5730\u5740\u6307\u9488\u540e\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u533f\u540d\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u7684\u65b9\u5f0f\uff0c\u5c06\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u6258\u7ba1\u7ed9\u504f\u79fb\u5730\u5740\u6307\u9488\uff1a<\/p>\n
\/\/bip::managed_shared_memory segment<\/span>\r\n\r\n\/\/\u521b\u5efa\u533f\u540d\u5171\u4eab\u5185\u5b58offset_ptr\u6307\u9488<\/span>\r\nIPCDataOffsetPtrT ipcDataOffsetPtr =\r\n\tsegment.construct<IPCData>(bip::anonymous_instance)\r\n\t\t(shared_string::allocator_type(segment.get_segment_manager()));<\/code><\/pre>\n
\u6b64\u540e\uff0c\u5b9a\u4e49\u76f8\u5e94\u7684\u5171\u4eab\u5185\u5b58\u901a\u9053\uff0c\u8ba9\u8fdb\u7a0bA\u5c06offset_ptr\u653e\u5165\u901a\u9053\u3002<\/p>\n
#include<\/span> <boost\/interprocess\/containers\/list.hpp><\/span><\/span>\r\n\r\nnamespace<\/span> bip = boost::interprocess;   \/\/\u7ed9ipc\u8bbe\u7f6e\u522b\u540d<\/span>\r\n\r\n\/\/\u5b9a\u4e49\u57fa\u4e8e\u8be5offsetPtr\u4ee5\u53ca\u5bf9\u5e94\u7684\u5185\u5b58\u5206\u914d\u5668\u7684queue<\/span>\r\ntypedef<\/span> bip::list<\/span><IPCDataOffsetPtrT, IPCDataOffsetPtrAllocatorT> IPCDataOffsetPtrQueueT;<\/code><\/pre>\n
\/\/bip::managed_shared_memory segment<\/span>\r\n\/\/ipcDataOffsetPtr <\/span>\r\n\r\n\/\/\u627e\u5230\u5bf9\u5e94\u7684allocator<\/span>\r\nconst<\/span> IPCDataOffsetPtrAllocatorT alloc_inst<\/span>(segment.get_segment_manager())<\/span><\/span>;\r\n\r\nIPCDataOffsetPtrQueueT *pIPCDataOffsetPtrQueue;\r\npIPCDataOffsetPtrQueue =\r\n\tsegment.construct<IPCDataOffsetPtrQueueT>\r\n\t\t(channelName.c_str())(alloc_inst);\r\n\r\n\r\npIPCDataOffsetPtrQueue->push_back(ipcDataOffsetPtr );<\/code><\/pre>\n
\u5e76\u7531\u8fdb\u7a0bB\u4ece\u901a\u9053\u4e2d\u8bfb\u53d6\u6570\u636e\uff1a<\/p>\n
\/\/bip::managed_shared_memory segment<\/span>\r\n\/\/ipcDataOffsetPtr <\/span>\r\n\r\nipcDataOffsetPtr = pIPCDataOffsetPtrQueue->front();\r\nIPCDataOffsetPtrQueue->pop_front();\r\n\r\ncout<\/span> <<ipcDataOffsetPtr->name << endl<\/span>;\r\n\r\n\/\/\u6b64\u540eipcData\u9700\u8981\u901a\u8fc7destroy_ptr\u8fdb\u884c\u5185\u5b58\u91ca\u653e<\/span>\r\nsegment.destroy_ptr(ipcDataOffsetPtr->get());<\/code><\/pre>\n
\u4f7f\u7528\u5b8c\u7684\u533f\u540d\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\uff0c\u5219\u901a\u8fc7\u5171\u4eab\u5185\u5b58\u6c60\u7684destroy_ptr\u5b8c\u6210\u5185\u5b58\u91ca\u653e\u3002<\/p>\n
2.2 \u57fa\u4e8e\u5185\u5b58\u53e5\u67c4\u7684\u5171\u4eab\u6570\u636e\u4f7f\u7528<\/h3>\n
\u4e0a\u8ff0\u533f\u540d\u5bf9\u8c61\u7684\u4f7f\u7528\u9700\u8981\u901a\u8fc7offset_ptr\u4f5c\u4e3a\u8de8\u8d8a\u8fdb\u7a0b\u7684\u6865\u6881\uff0c\u5728\u4e24\u4e2a\u8fdb\u7a0b\u95f4\u4f20\u8f93offset_ptr\uff0c\u4e4b\u540e\u518d\u901a\u8fc7offset_ptr\u95f4\u63a5\u7684\u83b7\u53d6\u5230\u5bf9\u5e94\u7684\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u3002\u8be5\u65b9\u6cd5\u80fd\u591f\u8fbe\u5230\u6570\u636e\u5171\u4eab\u7684\u76ee\u7684\uff0c\u4f46\u6709\u4e24\u70b9\u4e0d\u8db3\uff1a1). \u8be5\u65b9\u6cd5\u4f3c\u4e4e\u6709\u70b9\u7ed5\uff0c\u4e0d\u591f\u76f4\u89c2; 2). \u6539\u65b9\u6cd5\u7531\u4e8e\u4f20\u9012\u7684\u662f\u504f\u79fb\u6307\u9488\uff0c\u8be5\u6307\u9488\u5e76\u975e\u6734\u7d20\u7c7b\u578b(POD)\uff0c\u65e0\u6cd5\u4f7f\u7528boost\u7684\u65e0\u6240\u961f\u5217\u8fdb\u884c\u4f20\u9012\u3002\u662f\u5426\u6709\u66f4\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u4f7f\u5f97\u6211\u4eec\u53ef\u4ee5\u6709\u66f4\u52a0\u65b9\u4fbf\u7684\u65b9\u5f0f\u5728\u8fdb\u7a0b\u95f4\u5171\u4eab\u6570\u636e\u5462\uff1f\u7b54\u6848\u662f\uff1a\u53ef\u4ee5\u901a\u8fc7boost::interprocess::managed_shared_memory::handle\u3002\u901a\u8fc7handle\uff0c\u6211\u4eec\u53ef\u4ee5\u65b9\u4fbf\u7684\u8fd8\u539f\u51fa\u8be5handle\u5bf9\u5e94\u5bf9\u8c61\u7684\u6307\u9488\uff0c\u540c\u65f6\uff0c\u901a\u8fc7\u6307\u9488\u6211\u4eec\u4e5f\u80fd\u591f\u65b9\u4fbf\u7684\u6216\u8005\u6539\u6307\u9488\u5bf9\u5e94\u7684handle\u3002\u91cd\u8981\u7684\u662f\uff0c\u800c\u5b9e\u9645\u4e0a\uff0chandle\u5c31\u662f\u6734\u7d20\u7c7b\u578b\u7684int, \u6211\u4eec\u80fd\u591f\u65b9\u4fbf\u7684\u5c06\u5176\u901a\u8fc7\u65e0\u9501\u961f\u5217\u7684Queue\u7531\u4e00\u4e2a\u8fdb\u7a0b\u63a8\u9001\u5230\u53e6\u5916\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u8fdb\u800c\u8fbe\u5230\u5728\u8fdb\u7a0b\u95f4\u9ad8\u6548\u5171\u4eab\u6570\u636e\u7684\u76ee\u7684\u3002\u4e0b\u9762\u6211\u4eec\u6765\u770b\u770b\u57fa\u4e8ehandle+lockfree::queue\u6765\u5b8c\u6210\u8fdb\u7a0b\u95f4\u6570\u636e\u4f20\u8f93\u3002<\/p>\n
(1). \u7b80\u5355\u5b9a\u4e49\u6211\u4eec\u9700\u8981\u5728\u8fdb\u7a0b\u95f4\u5171\u4eab\u7684\u6570\u636e\u7ed3\u6784<\/h4>\n
#ifndef<\/span> __IPC_HANDLE_DATA_H__<\/span>\r\n#define<\/span> __IPC_HANDLE_DATA_H__<\/span>\r\n\r\n#include<\/span> <boost\/interprocess\/managed_shared_memory.hpp><\/span><\/span>\r\n#include<\/span> <boost\/interprocess\/allocators\/allocator.hpp><\/span><\/span>\r\n#include<\/span> <boost\/interprocess\/containers\/string.hpp><\/span><\/span>\r\n\r\nnamespace<\/span> bip = boost::interprocess;   \/\/\u7ed9ipc\u8bbe\u7f6e\u522b\u540d<\/span>\r\n\r\n\/\/\u9996\u5148\u5b9a\u4e49\u5171\u4eab\u5185\u5b58\u5206\u914d\u5668\u7c7b\u578b<\/span>\r\ntypedef<\/span> bip::allocator<char<\/span>, bip::managed_shared_memory::segment_manager> CharAllocator;\r\ntypedef<\/span> bip::basic_string<char<\/span>, std<\/span>::char_traits<char<\/span>>, CharAllocator> shared_string;\r\n\r\n\r\n\/\/\u7528\u4e8eIPCHandle\u4f20\u8f93<\/span>\r\nclass<\/span> IPCHandleData<\/span> {<\/span>\r\npublic<\/span>:\r\n\tIPCHandleData(const<\/span> shared_string::allocator_type& al);\r\n\t~IPCHandleData();\r\n\r\n\tint<\/span> id;\r\n\t__int64 id64;\r\n\tshared_string name;\r\n\r\n};\r\n#endif<\/span><\/span><\/code><\/pre>\n
\u8be5\u6570\u636e\u7c7b\u578b\u5305\u542b3\u4e2a\u5b57\u6bb5\uff1aid\u3001id64\u548cname<\/p>\n
(2). \u5b9a\u4e49\u6211\u4eec\u9700\u8981\u7528\u5230\u7684\u5171\u4eab\u5185\u5b58\u53e5\u67c4\u7c7b\u578b\uff0c\u4ee5\u53ca\u5171\u4eab\u5185\u5b58\u4e2d\u5b9a\u4e49\u65e0\u9501\u961f\u5217queue\u9700\u8981\u7684\u5206\u914d\u7c7b\u578b<\/h4>\n
\/\/\u5b9a\u4e49\u5171\u4eab\u5185\u5b58handle\u7c7b\u578b<\/span>\r\ntypedef<\/span> bip::managed_shared_memory::handle_t<\/span> IPCHandleT;\r\n\r\n\/\/\u5b9a\u4e49\u8be5handle\u7684\u5171\u4eab\u5185\u5b58\u5206\u914d\u5668<\/span>\r\ntypedef<\/span> bip::allocator<IPCHandleT, \r\n\t\t\tbip::managed_shared_memory::segment_manager> \r\n\t\t\t\t\t\t\t\tMyIPCHandleAllocatorT;\r\n\r\n\/\/\u5b9a\u4e49\u57fa\u4e8e\u8be5IPCHandle\u4ee5\u53ca\u5bf9\u5e94\u7684\u5185\u5b58\u5206\u914d\u5668\u7684Queue<\/span>\r\ntypedef<\/span> boost::lockfree::queue<\/span><IPCHandleT, \r\n\t\t\tboost::lockfree::capacity<65534>,  \/\/\u6700\u591a\u65f62^16-2<\/span>\r\n\t\t\tboost::lockfree::allocator<MyIPCHandleAllocatorT>> \r\n\t\t\t\t\t\t\t\tIPCHandleMwMrQueueT;<\/code><\/pre>\n
(3). \u7531\u4e00\u4e2a\u521b\u5efa\u8005(Creator)\u8d1f\u8d23\u521b\u5efa\u5171\u4eab\u5185\u5b58\uff0c\u5e76\u521b\u5efa\u7528\u4e8e\u4f20\u8f93\u7684\u65e0\u9501\u961f\u5217<\/h4>\n
void<\/span> Creator<\/span>()<\/span><\/span>{\r\n\tcout<\/span> << \"Creator\"<\/span> << endl<\/span>;\r\n\r\n\t\/\/ \u5220\u9664\u9057\u7559\u7684\u5171\u4eab\u5185\u5b58<\/span>\r\n\tbip::shared_memory_object::remove(\"MySharedMemory\"<\/span>);\r\n\r\n\t\/\/ \u6784\u5efa\u65b0\u7684\u6258\u7ba1\u5171\u4eab\u5185\u5b58\u533a<\/span>\r\n\tbip::managed_shared_memory segment<\/span>(bip::create_only,\r\n\t\t\"MySharedMemory\"<\/span>,  \/\/segment name<\/span>\r\n\t\t65536<\/span> * 1024<\/span> * 10<\/span>)<\/span><\/span>;\r\n\r\n\t\/\/ \u5b9a\u4e49\u6258\u7ba1\u5171\u4eab\u5185\u5b58\u533a\u7684\u5206\u914d\u5668<\/span>\r\n\tconst<\/span> MyIPCHandleAllocatorT alloc_inst<\/span>(segment.get_segment_manager())<\/span><\/span>;\r\n\r\n\ttry<\/span>\r\n\t{\r\n\t\r\n\t\/\/ \u521b\u5efa\u5171\u4eab\u5185\u5b58\u4e2d\u7684\u7528\u4e8e\u4f20\u9012IPCHandleT\u7684\u65e0\u9501\u961f\u5217<\/span>\r\n\tIPCHandleMwMrQueueT *pMyIPCHandleQueue =\r\n\t\tsegment.construct<IPCHandleMwMrQueueT>(\"MyIPCHandleQueue\"<\/span>)(alloc_inst);\r\n\t}\r\n\tcatch<\/span> (exception &e)\r\n\t{\r\n\t\tcout<\/span> << e.what() << endl<\/span>;\r\n\t}\r\n\r\n\tcout<\/span> << \"Creator is waiting here...\"<\/span> << endl<\/span>;\r\n\tsystem(\"pause\"<\/span>);\r\n\r\n\t\r\n}<\/code><\/pre>\n
(4). \u751f\u4ea7\u8005\u4e00\u65b9\u9996\u5148\u9644\u63a5\u5230\u5171\u4eab\u5185\u5b58<\/h4>\n
\u8fdb\u4e00\u6b65\u627e\u5230\u5bf9\u5e94\u7684\u65e0\u9501\u961f\u5217\u3002\u57fa\u4e8e\u5171\u4eab\u5185\u5b58\uff0c\u521b\u5efa\u5f85\u4f20\u8f93\u7684\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\uff0c\u5e76\u627e\u5230\u8be5\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u7684\u53e5\u67c4handle\uff0c\u5c06\u8be5\u53e5\u67c4handle\u653e\u5165\u5230\u65e0\u9501\u961f\u5217\u4e2d\uff0c\u5b8c\u6210\u4f20\u8f93\u52a8\u4f5c<\/p>\n
void<\/span> Producer<\/span>()<\/span><\/span>{\r\n\tcout<\/span> << \"Producer\"<\/span> << endl<\/span>;\r\n\r\n\t\/\/\u9644\u63a5\u76ee\u6807\u5171\u4eab\u5185\u5b58<\/span>\r\n\tbip::managed_shared_memory segment<\/span>(bip::open_only,\r\n\t\t\t\t\"MySharedMemory\"<\/span>)<\/span><\/span>;  \/\/segment name<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\r\n\ttypedef<\/span> std<\/span>::pair<IPCHandleMwMrQueueT *, \r\n\t\t\tbip::managed_shared_memory::size_type> ResultT;\r\n\tResultT res = segment.find<IPCHandleMwMrQueueT>(\"MyIPCHandleQueue\"<\/span>);\r\n\r\n\tcout<\/span> << \"res.second=\"<\/span> << res.second << endl<\/span>;\r\n\tif<\/span> (!res.second)\r\n\t{\r\n\t\tcout<\/span> << \"could not find \\\"MyIPCHandleQueue\\\"\"<\/span> << endl<\/span>;\r\n\t\treturn<\/span>;\r\n\t}\r\n\telse<\/span>\r\n\t{\r\n\t\tcout<\/span> << \"find \\\"MyIPCHandleQueue\\\"\"<\/span> << endl<\/span>;\r\n\t}\r\n\r\n\tIPCHandleMwMrQueueT *pMyIPCHandleQueue = res.first;\r\n\r\n\tint<\/span> id = 1<\/span>;\r\n\t\r\n\t\/\/\u521b\u5efa\u533f\u540d\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\uff0c\u9500\u6bc1\u65f6\u9700\u8981\u7528destroy_ptr<\/span>\r\n\tIPCHandleData *pIPCHandleData =\r\n \t\tsegment.construct<IPCHandleData>\r\n\t\t\t(bip::anonymous_instance)\r\n\t\t\t\t(shared_string::allocator_type(segment.get_segment_manager()));\r\n\tpIPCHandleData->id = id;\r\n\tpIPCHandleData->id64 = id;\r\n\r\n\tstringstream<\/span> ss;\r\n\tss << \"name-\"<\/span> << id;\r\n\tpIPCHandleData->name = ss.str().c_str();\r\n\r\n\tcout<\/span> << \"cur IPCHandleData :\"<\/span> << endl<\/span>;\r\n\tcout<\/span> << \"id=\"<\/span> << pIPCHandleData->id << endl<\/span>;\r\n\tcout<\/span> << \"id64=\"<\/span> << pIPCHandleData->id64 << endl<\/span>;\r\n\tcout<\/span> << \"name=\"<\/span> << pIPCHandleData->name << endl<\/span>;\r\n\r\n\t\/\/\u83b7\u53d6\u5171\u4eab\u5185\u5b58\u5bf9\u5e94\u7684handle<\/span>\r\n\tIPCHandleT curHandle = segment.get_handle_from_address(pIPCHandleData);\r\n\tcout<\/span> << \"handle=\"<\/span> << (int<\/span>)(curHandle) << endl<\/span>;\r\n\r\n\t\/\/\u5c06\u8be5handle\u653e\u5165queue\u4e2d\uff0c\u4f20\u9012\u7ed9\u5bf9\u7aef<\/span>\r\n\tpMyIPCHandleQueue->push(curHandle);\r\n\r\n}<\/code><\/pre>\n
(5). \u6d88\u8d39\u8005\uff0c\u540c\u6837\u9644\u63a5\u5230\u5171\u4eab\u5185\u5b58<\/h4>\n
\u5e76\u627e\u5230\u5bf9\u5e94\u7684Queue\uff0c\u4eceQueue\u4e2dpop\u51fahandle\u6570\u636e\uff0c\u57fa\u4e8e\u8be5handle\uff0c\u627e\u5230\u5bf9\u5e94\u7684\u5171\u4eab\u5185\u5b58\u6307\u9488\uff0c\u8fdb\u800c\u83b7\u53d6\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u7684\u4fe1\u606f<\/p>\n
void<\/span> Consumer<\/span>()<\/span><\/span>{\r\n\tcout<\/span> << \"Consumer\"<\/span> << endl<\/span>;\r\n\r\n\t\/\/\u9644\u63a5\u76ee\u6807\u5171\u4eab\u5185\u5b58<\/span>\r\n\tbip::managed_shared_memory segment<\/span>(bip::open_only,\r\n\t\t\"MySharedMemory\"<\/span>)<\/span><\/span>;  \/\/segment name<\/span>\r\n\t\t\r\n\ttypedef<\/span> std<\/span>::pair<IPCHandleMwMrQueueT *, \r\n\t\t\t\tbip::managed_shared_memory::size_type> ResultT;\r\n\tResultT res = segment.find<IPCHandleMwMrQueueT>(\"MyIPCHandleQueue\"<\/span>);\r\n\r\n\tcout<\/span> << \"res.second=\"<\/span> << res.second << endl<\/span>;\r\n\tif<\/span> (!res.second)\r\n\t{\r\n\t\tcout<\/span> << \"could not find \\\"MyIPCHandleQueue\\\"\"<\/span> << endl<\/span>;\r\n\t\treturn<\/span>;\r\n\t}\r\n\telse<\/span>\r\n\t{\r\n\t\tcout<\/span> << \"find \\\"MyIPCHandleQueue\\\"\"<\/span> << endl<\/span>;\r\n\t}\r\n\r\n\tIPCHandleMwMrQueueT *pMyIPCHandleQueue = res.first;\r\n\r\n\tIPCHandleT recvHandle;\r\n\tif<\/span> (pMyIPCHandleQueue->pop(recvHandle))\r\n\t{\r\n\t\tcout<\/span> << \"Recv data\"<\/span> << endl<\/span>;\r\n\r\n\t\t\/\/\u63a5\u6536\u5230\u6d88\u606f\u540e\uff0c\u901a\u8fc7handle\u627e\u5230\u5bf9\u5e94\u7684\u5171\u4eab\u5185\u5b58\u5bf9\u8c61<\/span>\r\n\t\tIPCHandleData *pIPCHandleData = \r\n\t\t\t(IPCHandleData *)segment.get_address_from_handle(recvHandle);\r\n\r\n\t\t\/\/\u8f93\u51fa\u5171\u4eab\u5185\u5b58\u5bf9\u8c61\u4fe1\u606f<\/span>\r\n\t\tcout<\/span> << \"recved IPCHandleData :\"<\/span> << endl<\/span>;\r\n\t\tcout<\/span> << \"id=\"<\/span> << pIPCHandleData->id << endl<\/span>;\r\n\t\tcout<\/span> << \"id64=\"<\/span> << pIPCHandleData->id64 << endl<\/span>;\r\n\t\tcout<\/span> << \"name=\"<\/span> << pIPCHandleData->name << endl<\/span>;\r\n\r\n\t\t\/\/\u6700\u7ec8\u91ca\u653e\u8be5\u5171\u4eab\u5185\u5b58\u5bf9\u8c61<\/span>\r\n\t\tsegment.destroy_ptr(pIPCHandleData);\r\n\t}\r\n}<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
\u539f\u6587\u5730\u5740   \u5171\u4eab\u5185\u5b58\uff0c\u662f\u8fdb\u7a0b<\/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":[119],"class_list":["post-4386","post","type-post","status-publish","format-standard","hentry","tag-03-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4386","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=4386"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/4386\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=4386"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=4386"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=4386"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}