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GET /api/1.2/patches/2226327/?format=api
{ "id": 2226327, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2226327/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhubrmqub2.gcc.gcc-TEST.redi.31.1.8@forge-stage.sourceware.org/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/1.2/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<bmm.hhubrmqub2.gcc.gcc-TEST.redi.31.1.8@forge-stage.sourceware.org>", "list_archive_url": null, "date": "2026-04-22T10:44:23", "name": "[v1,08/16] libstdc++: Remove reinterpret_cast uses in atomic wait/notify", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "b9ea9be85e745684672574fe75db00ebacf321fd", "submitter": { "id": 93210, "url": "http://patchwork.ozlabs.org/api/1.2/people/93210/?format=api", "name": "Jonathan Wakely via Sourceware Forge", "email": "forge-bot+redi@forge-stage.sourceware.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/bmm.hhubrmqub2.gcc.gcc-TEST.redi.31.1.8@forge-stage.sourceware.org/mbox/", "series": [ { "id": 500987, "url": "http://patchwork.ozlabs.org/api/1.2/series/500987/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500987", "date": "2026-04-22T10:44:17", "name": "atomic wait/notify ABI stabilization", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500987/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226327/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226327/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=38.145.34.32; helo=vm01.sourceware.org;\n envelope-from=gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org;\n receiver=patchwork.ozlabs.org)", "sourceware.org; dmarc=none (p=none dis=none)\n header.from=forge-stage.sourceware.org", "sourceware.org;\n spf=pass smtp.mailfrom=forge-stage.sourceware.org", "server2.sourceware.org;\n arc=none smtp.remote-ip=38.145.34.39" ], "Received": [ "from vm01.sourceware.org (vm01.sourceware.org [38.145.34.32])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g0xmq6K4yz1yCv\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 22 Apr 2026 21:28:07 +1000 (AEST)", "from vm01.sourceware.org (localhost [127.0.0.1])\n\tby sourceware.org (Postfix) with ESMTP id 8AF1E4313C84\n\tfor <incoming@patchwork.ozlabs.org>; Wed, 22 Apr 2026 11:28:05 +0000 (GMT)", "from forge-stage.sourceware.org (vm08.sourceware.org [38.145.34.39])\n by sourceware.org (Postfix) with ESMTPS id 6FE1F4015EB0\n for <gcc-patches@gcc.gnu.org>; Wed, 22 Apr 2026 10:46:05 +0000 (GMT)", "from forge-stage.sourceware.org (localhost [IPv6:::1])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange x25519 server-signature ECDSA (prime256v1) server-digest SHA256)\n (No client certificate requested)\n by forge-stage.sourceware.org (Postfix) with ESMTPS id E3CB742BB6\n for <gcc-patches@gcc.gnu.org>; Wed, 22 Apr 2026 10:46:01 +0000 (UTC)" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org 8AF1E4313C84", "OpenDKIM Filter v2.11.0 sourceware.org 6FE1F4015EB0" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 6FE1F4015EB0", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 6FE1F4015EB0", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1776854765; cv=none;\n b=x/RGWGSWlQjorkEFSb1LyoY+xo0gCdsHz5mJPJDK4YSkvqBxH3lBmZQZZiZn5ADs3VZCASjAsDqA1hnJMj9WvfEahL8YyO/68iAXgzYEHEefpq9KxUCfm5V8bhvA4AI90Dlj2FDjBAe2TtP7LMZy2ako99SnmVuHHVVgVGQB9oc=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1776854765; c=relaxed/simple;\n bh=U5lyBOInSSa92yigsHsrJKQZhUmxGMglCsF+OCGwImY=;\n h=From:Date:Subject:To:Message-ID;\n b=NlVpO46q+MyFeBppq3nXoDHQW7QqeNeSQ68M+m+UOVpuj08jxZziOzuGSg3TTFEawiAagmKiUyg7z1iprOX9gzhK6zsIxd6k2liI0pSk5cy754PGrJvv2Mj013agnNlSSVOn3OwZWqI1VWfdgglnOE2S8GGaFWOh7uIGKRhO4ts=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "From": "Jonathan Wakely via Sourceware Forge\n <forge-bot+redi@forge-stage.sourceware.org>", "Date": "Wed, 22 Apr 2026 10:44:23 +0000", "Subject": "[PATCH v1 08/16] libstdc++: Remove reinterpret_cast uses in atomic\n wait/notify", "To": "gcc-patches mailing list <gcc-patches@gcc.gnu.org>", "Message-ID": "\n <bmm.hhubrmqub2.gcc.gcc-TEST.redi.31.1.8@forge-stage.sourceware.org>", "X-Mailer": "batrachomyomachia", "X-Pull-Request-Organization": "gcc", "X-Pull-Request-Repository": "gcc-TEST", "X-Pull-Request": "https://forge.sourceware.org/gcc/gcc-TEST/pulls/31", "References": "\n <bmm.hhubrmqub2.gcc.gcc-TEST.redi.31.1.0@forge-stage.sourceware.org>", "In-Reply-To": "\n <bmm.hhubrmqub2.gcc.gcc-TEST.redi.31.1.0@forge-stage.sourceware.org>", "X-Patch-URL": "\n https://forge.sourceware.org/redi/gcc/commit/b1f8b965c96462353d813f09a864976fc66b8ca2", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Reply-To": "gcc-patches mailing list <gcc-patches@gcc.gnu.org>, redi@gcc.gnu.org", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "From: Jonathan Wakely <jwakely@redhat.com>\n\nWe can pass around void* instead of casting incompatible pointers to\n__platform_wait_t*, and then only static_cast to __platform_wait_t* when\nwe know that's valid.\n\nlibstdc++-v3/ChangeLog:\n\n\t* include/bits/atomic_timed_wait.h (__wait_until_impl): Change\n\tfirst parameter to const void* and then static_cast to const\n\t__platform_wait_t* when not using proxied wait.\n\t(__wait_until): Change first parameter to const void*.\n\t(__wait_for): Likewise.\n\t(__atomic_wait_address_until): Remove reinterpret_cast and allow\n\taddress to implicitly convert to const void* instead.\n\t(__atomic_wait_address_for): Likewise.\n\t* include/bits/atomic_wait.h: (__wait_impl, __notify_impl):\n\tChange first parameter to const void* and then static_cast to\n\tconst __platform_wait_t* when not using proxied wait.\n\t(__atomic_wait_address, __atomic_notify_address) Remove\n\treinterpret_cast and allow address to implicitly convert to\n\tconst void* instead.\n---\n libstdc++-v3/include/bits/atomic_timed_wait.h | 17 ++++++-----------\n libstdc++-v3/include/bits/atomic_wait.h | 16 ++++++----------\n 2 files changed, 12 insertions(+), 21 deletions(-)", "diff": "diff --git a/libstdc++-v3/include/bits/atomic_timed_wait.h b/libstdc++-v3/include/bits/atomic_timed_wait.h\nindex a916c10879b7..cbf9187f2bb8 100644\n--- a/libstdc++-v3/include/bits/atomic_timed_wait.h\n+++ b/libstdc++-v3/include/bits/atomic_timed_wait.h\n@@ -170,8 +170,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n }\n \n inline __wait_result_type\n- __wait_until_impl(const __platform_wait_t* __addr,\n-\t\t const __wait_args_base& __a,\n+ __wait_until_impl(const void* __addr, const __wait_args_base& __a,\n \t\t const __wait_clock_t::time_point& __atime)\n {\n __wait_args_base __args = __a;\n@@ -184,7 +183,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t __atomic_load(__wait_addr, &__args._M_old, __args._M_order);\n \t}\n else\n-\t__wait_addr = __addr;\n+\t__wait_addr = static_cast<const __platform_wait_t*>(__addr);\n \n if (__args & __wait_flags::__do_spin)\n \t{\n@@ -222,7 +221,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n // Returns {true, val} if wait ended before a timeout.\n template<typename _Clock, typename _Dur>\n __wait_result_type\n- __wait_until(const __platform_wait_t* __addr, const __wait_args_base& __args,\n+ __wait_until(const void* __addr, const __wait_args_base& __args,\n \t\t const chrono::time_point<_Clock, _Dur>& __atime) noexcept\n {\n \tauto __at = __detail::__to_wait_clock(__atime);\n@@ -243,7 +242,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n // Returns {true, val} if wait ended before a timeout.\n template<typename _Rep, typename _Period>\n __wait_result_type\n- __wait_for(const __platform_wait_t* __addr, const __wait_args_base& __args,\n+ __wait_for(const void* __addr, const __wait_args_base& __args,\n \t\t const chrono::duration<_Rep, _Period>& __rtime) noexcept\n {\n \tif (!__rtime.count())\n@@ -270,13 +269,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t\t\t\tconst chrono::time_point<_Clock, _Dur>& __atime,\n \t\t\t\tbool __bare_wait = false) noexcept\n {\n- const auto __wait_addr =\n-\treinterpret_cast<const __detail::__platform_wait_t*>(__addr);\n __detail::__wait_args __args{ __addr, __bare_wait };\n _Tp __val = __vfn();\n while (!__pred(__val))\n \t{\n-\t auto __res = __detail::__wait_until(__wait_addr, __args, __atime);\n+\t auto __res = __detail::__wait_until(__addr, __args, __atime);\n \t if (!__res.first)\n \t // timed out\n \t return __res.first; // C++26 will also return last observed __val\n@@ -320,13 +317,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t\t\t const chrono::duration<_Rep, _Period>& __rtime,\n \t\t\t bool __bare_wait = false) noexcept\n {\n- const auto __wait_addr =\n-\t reinterpret_cast<const __detail::__platform_wait_t*>(__addr);\n __detail::__wait_args __args{ __addr, __bare_wait };\n _Tp __val = __vfn();\n while (!__pred(__val))\n \t{\n-\t auto __res = __detail::__wait_for(__wait_addr, __args, __rtime);\n+\t auto __res = __detail::__wait_for(__addr, __args, __rtime);\n \t if (!__res.first)\n \t // timed out\n \t return __res.first; // C++26 will also return last observed __val\ndiff --git a/libstdc++-v3/include/bits/atomic_wait.h b/libstdc++-v3/include/bits/atomic_wait.h\nindex 5fd00c22565b..cfda323a3ab6 100644\n--- a/libstdc++-v3/include/bits/atomic_wait.h\n+++ b/libstdc++-v3/include/bits/atomic_wait.h\n@@ -355,7 +355,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n }\n \n inline __wait_result_type\n- __wait_impl(const __platform_wait_t* __addr, const __wait_args_base& __a)\n+ __wait_impl(const void* __addr, const __wait_args_base& __a)\n {\n __wait_args_base __args = __a;\n __waiter_pool_impl* __pool = nullptr;\n@@ -368,7 +368,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t __atomic_load(__wait_addr, &__args._M_old, __args._M_order);\n \t}\n else\n-\t__wait_addr = __addr;\n+\t__wait_addr = static_cast<const __platform_wait_t*>(__addr);\n \n if (__args & __wait_flags::__do_spin)\n \t{\n@@ -401,7 +401,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n }\n \n inline void\n- __notify_impl(const __platform_wait_t* __addr, [[maybe_unused]] bool __all,\n+ __notify_impl(const void* __addr, [[maybe_unused]] bool __all,\n \t\t const __wait_args_base& __args)\n {\n __waiter_pool_impl* __pool = nullptr;\n@@ -420,7 +420,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t __all = true;\n \t}\n else // Use the atomic variable's own address.\n-\t__wait_addr = __addr;\n+\t__wait_addr = static_cast<const __platform_wait_t*>(__addr);\n \n if (__args & __wait_flags::__track_contention)\n \t{\n@@ -449,8 +449,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n __atomic_wait_address(const _Tp* __addr, _Pred&& __pred, _ValFn&& __vfn,\n \t\t\t bool __bare_wait = false) noexcept\n {\n- const auto __wait_addr =\n-\t reinterpret_cast<const __detail::__platform_wait_t*>(__addr);\n __detail::__wait_args __args{ __addr, __bare_wait };\n _Tp __val = __vfn();\n while (!__pred(__val))\n@@ -462,7 +460,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n \t\t\t\t\t __val);\n \t // Otherwise, it's a proxy wait and the proxy's _M_ver is used.\n \n-\t __detail::__wait_impl(__wait_addr, __args);\n+\t __detail::__wait_impl(__addr, __args);\n \t __val = __vfn();\n \t}\n // C++26 will return __val\n@@ -494,10 +492,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION\n __atomic_notify_address(const _Tp* __addr, bool __all,\n \t\t\t bool __bare_wait = false) noexcept\n {\n- const auto __wait_addr =\n-\t reinterpret_cast<const __detail::__platform_wait_t*>(__addr);\n __detail::__wait_args __args{ __addr, __bare_wait };\n- __detail::__notify_impl(__wait_addr, __all, __args);\n+ __detail::__notify_impl(__addr, __all, __args);\n }\n _GLIBCXX_END_NAMESPACE_VERSION\n } // namespace std\n", "prefixes": [ "v1", "08/16" ] }