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.
- Python >= 3.6
- Cython >= 0.28
- Sphinx >= 1.6 (for building the documentation)
- PARI/GP (optional; for interfacing with the PARI/GP signal handler)
- cysignals on the Python package index: https://pypi.org/project/cysignals/
- cysignals code repository and issue tracker on GitHub: https://github.com/sagemath/cysignals
- full cysignals documentation on Read the Docs: https://cysignals.readthedocs.io/
- Replace fprintf by calls to write, which is async-signal-safe according to POSIX. [#162]
- Drop assembly code added after 1.10.3 that is not portable.
- Drop Python 2 support; bump minimum Python version to 3.6. [#142]
- Fixed compilation with glib 3.34. [#151]
- Improved testing. [#139, #152, #154]
- 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