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Thu, 18 Sep 2025 13:16:04 -0600 From: Tom Tromey To: simon.marchi@polymtl.ca Cc: gdb-patches@sourceware.org Subject: Re: [PATCH v2 3/4] gdbsupport: add async parallel_for_each version In-Reply-To: <20250703200130.4095761-3-simon.marchi@polymtl.ca> (simon marchi's message of "Thu, 3 Jul 2025 16:01:18 -0400") References: <20250703200130.4095761-1-simon.marchi@polymtl.ca> <20250703200130.4095761-3-simon.marchi@polymtl.ca> X-Attribution: Tom Date: Thu, 18 Sep 2025 13:16:03 -0600 Message-ID: <871po3h8r0.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) MIME-Version: 1.0 Content-Type: text/plain X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - sourceware.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 97.122.110.68 X-Source-L: No X-Exim-ID: 1uzK6u-0000000398a-13iu X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 97-122-110-68.hlrn.qwest.net (bapiya) [97.122.110.68]:53558 X-Source-Auth: tom+tromey.com X-Email-Count: 5 X-Org: HG=bhshared;ORG=bluehost; X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfIM2JFdr5PCHRCoJVlvvRSk/0GTTm0KUmFbv5rRKl0NICwphiT8ILgNwsZjCOGQUcIRRUL5JvQypckz9GOjq0nQDhr3KzhSps1RybeWYZ3eAzFie+pxu kXMgg6fgilYjtpMFXH3k6QL+Vy1PjD3YO5AVG2bceDxq5IKPXAe0/7zTCY1a1bMGSsaODpDUztrEgohb+I6b7rbsRFGlwsVORvk= X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org >>>>> "Simon" == simon marchi writes: Simon> From: Simon Marchi Simon> New in v2: make the global variable constexpr. Simon> I would like to use gdb::parallel_for_each to implement the parallelism Simon> of the DWARF unit indexing. However, the existing implementation of Simon> gdb::parallel_for_each is blocking, which doesn't work with the model Simon> used by the DWARF indexer, which is asynchronous and callback-based. Simon> Add an asynchronouys version of gdb::parallel_for_each that will be Simon> suitable for this task. Simon> This new version accepts a callback that is invoked when the parallel Simon> for each is complete. This looks good to me. Simon> + const auto [batch_first, batch_last] = state->queue.pop_batch (); Simon> + Simon> + if (batch_first == batch_last) Simon> + break; If this was using iterator_range, it'd be easy enough to add an 'empty' method to that object. Tom