Merge branch 'stefanozampini/vtk-every' into 'main'

TSMonitorSolutionVTK: add dumping interval

See merge request petsc/petsc!7807

TSMonitorSolutionVTK: add dumping interval

Merge branch 'barry/2024-07-01/fix-petscoptionsgetviewer' into 'main'

The use case of PetscOptionsGetViewer() has evolved to no longer be the get/restore model

See merge request petsc/petsc!7667

The use case of PetscOptionsGetViewer() has evolved to no longer be the get/restore model

Hence the code needs to be refactored

Introduce PetscCallNull() and PetscCallMPINull() to simplify PETSC_VI

The use case of PetscOptionsGetViewer() has evolved to no longer be the get/restore model

Hence the code needs to be refactored

Introduce PetscCallNull() and PetscCallMPINull() to simplify PETSC_VIEWER_XXXX_() routines

Reported-by: James Wright
Thanks-to: Jeremy L Thompson

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Merge branch 'jolivet/clang-format-18' into 'main'

clang-format version 18

See merge request petsc/petsc!6902

checkbadSource: rules for PetscFunctionBegin and derivatives

Merge remote-tracking branch 'origin/release'

Merge branch 'barry/2024-01-12/docs-update-start-of-manual/release' into 'release'

Updates, copyedits for first part of users manual

See merge request petsc/petsc!7191

Updates, copyedits for first part of users manual

Merge remote-tracking branch 'origin/release'

Merge branch 'barry/2023-12-04/fix-manpage-references/release' into 'release'

Update references in the manual pages to use Sphinx citation processing

See merge request petsc/petsc!7101

Update references in the manual pages to use Sphinx citation processing

Merge branch 'barry/2023-11-21/fix-thread-safety-petscoptionsgetviewer' into 'main'

Fix PetscOptionsGetViewer() so it works in a thread-safe way

See merge request petsc/petsc!7047

Fix PetscOptionsGetViewer() so it works in a thread-safe way

When PetscOptionsGetViewer() returns, for example, PETSC_VIEWER_STDOUT_SELF the same object is shared
by all threads that call PetscOptio

Fix PetscOptionsGetViewer() so it works in a thread-safe way

When PetscOptionsGetViewer() returns, for example, PETSC_VIEWER_STDOUT_SELF the same object is shared
by all threads that call PetscOptionsGetViewer(). In the previous code PetscObjectReference() and
dereference (via PetscViewerDestroy() where called on the viewer by multiple threads after the viewer
was accessed thus corrupting the object.

This branch introduces a PetscOptionsRestoreViewer() that allows not doing the referencing and dereferencing
on persistant viewers, thus removing the specific race condition above.

Other possible solutions include

Use a lock on each PetscObjectReference/Dereference() just in case they are shared. Could be time consuming so one
could mark each object as either threadshared or independent and only do the locks on threadshared objects. This lowers
the cost but would require more extensive changes to PETSc infrastructure. And I do not know if this shared/not shared model
is what we need in the long run, though it might be.

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Merge branch 'jacobf/2023-07-19/lint-apply-ts' into 'main'

Manual linter fixes: ts

See merge request petsc/petsc!6736

... and apply it

Manual linter fixes: ts

Merge branch 'jacobf/2023-06-30/enable-doc-lint' into 'main'

Enable docs linting

See merge request petsc/petsc!6667

Lint apply: ts

Merge remote-tracking branch 'origin/release'

Merge branch 'barry/2023-05-27/improve-tutorials/release' into 'release'

Minor cleanup of website tutorials

See merge request petsc/petsc!6520

change to consistent use of ch_xxx for chapter names in the docs, instead of a mix of ch_xx and chapter_xx

Merge branch 'barry/2023-03-25/fix-more-manualpages' into 'main'

More manual page fixes

See merge request petsc/petsc!6233

More manual page fixes

Merge branch 'barry/2023-03-08/fix-man-pages-detected-by-lint' into 'main'

Fix many manual pages

See merge request petsc/petsc!6162