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    <title>MongoDB Jira</title>
    <link>https://jira.mongodb.org</link>
    <description>This file is an XML representation of an issue</description>
    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[CDRIVER-4227] Use a shared_mutex when locking in shared_ptr atomic operations </title>
                <link>https://jira.mongodb.org/browse/CDRIVER-4227</link>
                <project id="10030" key="CDRIVER">C Driver</project>
                    <description>&lt;p&gt;At very high thread counts, locking on the shared_ptr atomic mutex begins to dominate. Using a shared_mutex significantly reduces the time spent in locking code and increases the performance under high contention.&lt;/p&gt;</description>
                <environment></environment>
        <key id="1924357">CDRIVER-4227</key>
            <summary>Use a shared_mutex when locking in shared_ptr atomic operations </summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13201">Fixed</resolution>
                                        <assignee username="colby.pike@mongodb.com">Colby Pike</assignee>
                                    <reporter username="colby.pike@mongodb.com">Colby Pike</reporter>
                        <labels>
                    </labels>
                <created>Fri, 12 Nov 2021 20:30:10 +0000</created>
                <updated>Sat, 28 Oct 2023 11:28:16 +0000</updated>
                            <resolved>Wed, 17 Nov 2021 15:31:46 +0000</resolved>
                                                    <fixVersion>1.20.0</fixVersion>
                                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="4194233" author="xgen-internal-githook" created="Wed, 17 Nov 2021 07:30:59 +0000"  >&lt;p&gt;Author:&lt;/p&gt;
{&apos;name&apos;: &apos;vector-of-bool&apos;, &apos;email&apos;: &apos;vectorofbool@gmail.com&apos;, &apos;username&apos;: &apos;vector-of-bool&apos;}
&lt;p&gt;Message: &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-4227&quot; title=&quot;Use a shared_mutex when locking in shared_ptr atomic operations &quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-4227&quot;&gt;&lt;del&gt;CDRIVER-4227&lt;/del&gt;&lt;/a&gt; Add a shared_mutex, and use it when locking in shared_ptr atomic operations (#895)&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Add a shared_mutex, and use it when locking in shared_ptr atomic operations&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Tag &lt;a href=&quot;https://jira.mongodb.org/browse/CDRIVER-4002&quot; title=&quot;Improve multi-threaded perf for mongoc_client_pool_t&quot; class=&quot;issue-link&quot; data-issue-key=&quot;CDRIVER-4002&quot;&gt;&lt;del&gt;CDRIVER-4002&lt;/del&gt;&lt;/a&gt;&lt;/p&gt;

&lt;p&gt;Co-authored-by: Kevin Albertson &amp;lt;kevin.albertson@10gen.com&amp;gt;&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;Force enable more recent POSIX APIs, regardless of language mode&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;This change only applies to private code, and does not expose any&lt;br/&gt;
changes in the public API.&lt;/p&gt;

&lt;ul&gt;
	&lt;li&gt;No reallocf in strict POSIX mode&lt;/li&gt;
&lt;/ul&gt;


&lt;p&gt;Co-authored-by: Kevin Albertson &amp;lt;kevin.albertson@10gen.com&amp;gt;&lt;br/&gt;
Branch: master&lt;br/&gt;
&lt;a href=&quot;https://github.com/mongodb/mongo-c-driver/commit/8d1af19aa067818044d5f52039ae2c761dad3168&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-c-driver/commit/8d1af19aa067818044d5f52039ae2c761dad3168&lt;/a&gt;&lt;/p&gt;</comment>
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                            <issuelinktype id="10520">
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                                            <outwardlinks description="causes">
                                        <issuelink>
            <issuekey id="1933738">CDRIVER-4233</issuekey>
        </issuelink>
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                                                        </issuelinktype>
                            <issuelinktype id="10012">
                    <name>Related</name>
                                            <outwardlinks description="related to">
                                        <issuelink>
            <issuekey id="1954423">CDRIVER-4249</issuekey>
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