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Julia interface to hypre linear solvers (https://github.com/hypre-space/hypre)
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HYPRE.jl/docs/src/libhypre.md

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LibHYPRE C API

The submodule HYPRE.LibHYPRE contains auto-generated bindings to the HYPRE library and give access to the HYPRE C API directly1. The module exports all HYPRE_* symbols. Function names and arguments are identical to the C-library -- refer to the HYPRE manual for details.

The example program examples/ex5.jl is an (almost) line-to-line translation of the corresponding example program examples/ex5.c written in C, and showcases how HYPRE.jl can be used to interact with the HYPRE library directly.

Functions from the LibHYPRE submodule can be used together with the high level interface. This is useful when you need some functionality from the library which isn't exposed in the high level interface. Many functions require passing a reference to a matrix/vector or a solver. HYPRE.jl defines the appropriate conversion methods used by ccall such that

  • A::HYPREMatrix can be passed to HYPRE_* functions with HYPRE_IJMatrix or HYPRE_ParCSRMatrix in the signature
  • b::HYPREVector can be passed to HYPRE_* functions with HYPRE_IJVector or HYPRE_ParVector in the signature
  • s::HYPRESolver can be passed to HYPRE_* functions with HYPRE_Solver in the signature

  1. Bindings are generated using Clang.jl, see [gen/generator.jl] (https://github.com/fredrikekre/HYPRE.jl/blob/master/gen/generator.jl). ↩︎