126215 2013-12-24 09:55:32 -0800 Replace WTF::ThreadingOnce with std::call_once 2013-12-30 11:29:13 -0800 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 andersca andersca benjamin cmarcelo commit-queue sam oldest_to_newest 962776 0 andersca 2013-12-24 09:55:32 -0800 Replace WTF::ThreadingOnce with std::call_once 962792 1 219977 andersca 2013-12-24 12:48:28 -0800 Created attachment 219977 Patch 962796 2 commit-queue 2013-12-24 12:51:12 -0800 Attachment 219977 did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/JavaScriptCore/ChangeLog', u'Source/JavaScriptCore/dfg/DFGWorklist.cpp', u'Source/JavaScriptCore/runtime/InitializeThreading.cpp', u'Source/WTF/ChangeLog', u'Source/WTF/GNUmakefile.list.am', u'Source/WTF/wtf/CompilationThread.cpp', u'Source/WTF/wtf/ThreadingOnce.h', '--commit-queue']" exit_code: 1 ERROR: Source/JavaScriptCore/runtime/InitializeThreading.cpp:55: Missing space before { [whitespace/braces] [5] ERROR: Source/WTF/wtf/CompilationThread.cpp:41: Missing space before { [whitespace/braces] [5] Total errors found: 2 in 5 files If any of these errors are false positives, please file a bug against check-webkit-style. 962814 3 sam 2013-12-24 18:32:31 -0800 Not that it matters in these places much, but how does the performance of std::call_once compare to pthread_once and dispatch_once? I see in libc++'s implementation there is comment stating it should consider moving to dispatch_once (presumably for performance reasons) http://llvm.org/viewvc/llvm-project/libcxx/trunk/src/mutex.cpp?view=markup#l209. The comment seems predicated on dispatch_once_f supporting c++ exceptions, but perhaps the maintainers would consider an optimized version when exceptions were disabled as they are with WebKit. 963353 4 andersca 2013-12-30 10:54:43 -0800 (In reply to comment #3) > Not that it matters in these places much, but how does the performance of std::call_once compare to pthread_once and dispatch_once? It's faster than pthread_once since the first check ends up being inlined. 963360 5 219977 commit-queue 2013-12-30 11:29:11 -0800 Comment on attachment 219977 Patch Clearing flags on attachment: 219977 Committed r161146: <http://trac.webkit.org/changeset/161146> 963361 6 commit-queue 2013-12-30 11:29:13 -0800 All reviewed patches have been landed. Closing bug. 219977 2013-12-24 12:48:28 -0800 2013-12-30 11:29:11 -0800 Patch bug-126215-20131224124828.patch text/plain 9481 andersca U3VidmVyc2lvbiBSZXZpc2lvbjogMTYxMDU2CmRpZmYgLS1naXQgYS9Tb3VyY2UvSmF2YVNjcmlw dENvcmUvQ2hhbmdlTG9nIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwppbmRleCAw OGI0NjRhMzNhZmU4M2E5ZjkzYmRmMjBkMzdiOTEwNzUzZjU0OGMxLi43MGNmOWI0Nzk0ZTg2YWQ4 ZTk0MzMwZTc3MWM3NmFhMDk5YjRlODYwIDEwMDY0NAotLS0gYS9Tb3VyY2UvSmF2YVNjcmlwdENv cmUvQ2hhbmdlTG9nCisrKyBiL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKQEAgLTEs MyArMSwxNSBAQAorMjAxMy0xMi0yNCAgQW5kZXJzIENhcmxzc29uICA8YW5kZXJzY2FAYXBwbGUu Y29tPgorCisgICAgICAgIFJlcGxhY2UgV1RGOjpUaHJlYWRpbmdPbmNlIHdpdGggc3RkOjpjYWxs X29uY2UKKyAgICAgICAgaHR0cHM6Ly9idWdzLndlYmtpdC5vcmcvc2hvd19idWcuY2dpP2lkPTEy NjIxNQorCisgICAgICAgIFJldmlld2VkIGJ5IE5PQk9EWSAoT09QUyEpLgorCisgICAgICAgICog ZGZnL0RGR1dvcmtsaXN0LmNwcDoKKyAgICAgICAgKEpTQzo6REZHOjpnbG9iYWxXb3JrbGlzdCk6 CisgICAgICAgICogcnVudGltZS9Jbml0aWFsaXplVGhyZWFkaW5nLmNwcDoKKyAgICAgICAgKEpT 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