Forward-merge release/26.02 into main#825
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rgsl888prabhu merged 1 commit intomainfrom Feb 4, 2026
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This PR adds callbacks to C API. Users can now use C API to implement get_solution and set_solution callbacks. This PR is a breaking PR that changes callback input/output pointers from device memory to host memory. We are also adding a user_data pointer for user to be more flexible inside the callbacks as well as dual bound for the B&B tree. Previously callbacks were not enabled when third party presolved was enabled. Now we are able to handle uncrushing of solutions when third party presolve is enabled on get_solution callbacks. Registering a set_solution callback disables presolve as there is no way of crushing a solution in original space to reduced space when using third party presolve. The examples and tests are modified to reflect the change. ## Summary by CodeRabbit * **New Features** * MIP incumbent get/set callbacks with optional user_data and registration; server/client flag to enable set-callback behavior. * **Behavior** * Incumbent records now include bound and user_data; solution-bound handling made thread-safe. Registering a set-solution callback may disable presolve and enables host-side incumbent injection. * **Tests** * Added tests for get-only and get-and-set flows, user_data propagation, bound reporting, and presolve interactions. * **Documentation** * Examples and docs updated to show callbacks, user_data, bound reporting, and set-callback usage. Authors: - Akif ÇÖRDÜK (https://github.com/akifcorduk) - Alice Boucher (https://github.com/aliceb-nv) Approvers: - Ramakrishnap (https://github.com/rgsl888prabhu) - Nicolas L. Guidotti (https://github.com/nguidotti) URL: #779
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FAILURE - Unable to forward-merge due to an error, manual merge is necessary. Do not use the IMPORTANT: When merging this PR, do not use the auto-merger (i.e. the |
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Forward-merge triggered by push to release/26.02 that creates a PR to keep main up-to-date. If this PR is unable to be immediately merged due to conflicts, it will remain open for the team to manually merge. See forward-merger docs for more info.