A recurrent question (well, one of the many) is about STL containers and whether they are thread safe.<\/p>\n
Taking Stephan’s words here, the reality is that they aren’t, not as a bug but as a feature: having every member function of every STL container acquiring an internal lock would annihilate performance. As a general purpose, highly reusable library, it wouldn’t actually provide correctness either: the correct level to place locks is determined by what the program is doing. In that sense, individual member functions don’t tend to be such correct level. <\/p>\n
\/\/ This article tells more about Thread Safety in the Yet if performance were not an issue, for instance because it’s not expected a high volume of write accesses to a container instance, but you just want to just make sure that simultaneous writes won’t leave the container in an undetermined state, you may get among other alternatives the parallel containers<\/a> that come with the Parallel Patterns Library (PPL)<\/a>.<\/p>\n They are basically concurrent_vector<\/span> and concurrent_queue<\/span>, so in case you missed concurrent versions of associative containers<\/a> like map<\/span>, multimap<\/span> or hashmap<\/span>, you may find sample implementations in http:\/\/code.msdn.microsoft.com\/concrtextras<\/a>.<\/p><\/p>\n","protected":false},"excerpt":{"rendered":" A recurrent question (well, one of the many) is about STL containers and whether they are thread safe. Taking Stephan’s words here, the reality is that they aren’t, not as a bug but as a feature: having every member function of every STL container acquiring an internal lock would annihilate performance. As a general purpose, […]<\/p>\n","protected":false},"author":293,"featured_media":35994,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[38,80],"class_list":["post-3483","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cplusplus","tag-container","tag-parallelism"],"acf":[],"blog_post_summary":" A recurrent question (well, one of the many) is about STL containers and whether they are thread safe. Taking Stephan’s words here, the reality is that they aren’t, not as a bug but as a feature: having every member function of every STL container acquiring an internal lock would annihilate performance. As a general purpose, […]<\/p>\n","_links":{"self":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/posts\/3483","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/users\/293"}],"replies":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/comments?post=3483"}],"version-history":[{"count":0,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/posts\/3483\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/media\/35994"}],"wp:attachment":[{"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/media?parent=3483"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/categories?post=3483"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/devblogs.microsoft.com\/cppblog\/wp-json\/wp\/v2\/tags?post=3483"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\/\/ <\/span>Standard C++ Library: <\/span><\/span>http:\/\/msdn.microsoft.com\/en-us\/library\/c9ceah3b.aspx<\/span><\/a><\/p>\n