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Interrupt and signal handling for Cython

Project description

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Cython and interrupts

When writing Cython code, special care must be taken to ensure that the code can be interrupted with CTRL-C. Since Cython optimizes for speed, Cython normally does not check for interrupts. For example, code like the following cannot be interrupted in Cython:

while True:
    pass

The cysignals package provides mechanisms to handle interrupts (and other signals and errors) in Cython code.

Requirements

  • Python >= 3.6

  • Cython >= 0.28

  • Sphinx >= 1.6 (for building the documentation)

  • PARI/GP (optional; for interfacing with the PARI/GP signal handler)

Changelog

1.11.4 (2023-10-07)

  • Include generated configure script in the sdist again.

1.11.3 (2023-10-04)

  • Add support for Cython 3. [#174, #176, #182, #187]

  • Add support for Python 3.12.

  • Replace fprintf by calls to write, which is async-signal-safe according to POSIX. [#162]

  • Introduce a general hook to interface with custom signal handling. [#181]

1.11.2 (2021-12-15)

  • Drop assembly code added after 1.10.3 that is not portable.

1.11.0 (2021-11-26)

  • Drop Python 2 support; bump minimum Python version to 3.6. [#142]

  • Fixed compilation with glib 3.34. [#151]

  • Improved testing. [#139, #152, #154]

1.10.3 (2021-03-16)

  • Improved installation of cysignals with pip install -e. [#130]

  • Fixed compilation of OpenMP modules that also use cysignals. [#128]

  • Fixed segmentation fault that could occur when sig_occurred() is called recursively during garbage collection. [#127]

  • Improved error reporting of signals that occurred inside sig_on() as opposed to outside them.

  • Fixed bug in the cysignals_example package. [#113]

For changes in previous releases, see the best source available is to compare git tags: https://github.com/sagemath/cysignals/tags

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