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Description: Added call to mysql_library_init during initialization of the gem
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This call must be performed before trying to call mysql_init from
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multiple threads
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Reference: http://dev.mysql.com/doc/refman/5.1/en/mysql-init.html
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Minimal reproduction of the problem if mysql_library_init is not called
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require 'mysql2'
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def connect
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Mysql2::Client.new()
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end
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threads = [0,1].map {
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Thread.new { connect }
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}
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threads.map(&:join)
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puts "OK!"
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Author: Michael Kruglos <michael@kruglos.com>
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Reviewed-by: Cédric Boutillier <boutil@debian.org>
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Origin: upstream,https://github.com/brianmario/mysql2/commit/de48627ee89b9dfd7d966f3ea747e95a48085792.patch
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Last-Update: 2014-07-30
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--- a/ext/mysql2/client.c
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+++ b/ext/mysql2/client.c
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@@ -1237,6 +1237,13 @@
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}
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}
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+ /* Initializing mysql library, so different threads could call Client.new */
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+ /* without race condition in the library */
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+ if (mysql_library_init(0, NULL, NULL) != 0) {
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+ rb_raise(rb_eRuntimeError, "Could not initialize MySQL client library");
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+ return;
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+ }
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+
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#if 0
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mMysql2 = rb_define_module("Mysql2"); Teach RDoc about Mysql2 constant.
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#endif
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