A modern, delicious implementation of the Nix package manager, focused on correctness, usability, and growth — and committed to doing right by its community
https://lix.systems
cacff1be88
poll for it (i.e. if we can't acquire the lock, then let the main select() loop wait for at most a few seconds and then try again). This improves parallelism: if two nix-store processes are both trying to build a path at the same time, the second one shouldn't block; it should first see if it can build other goals. Also, it prevents the deadlocks that have been occuring in Hydra lately, where a process waits for a lock held by another process that's waiting for a lock held by the first. The downside is that polling isn't really elegant, but POSIX doesn't provide a way to wait for locks in a select() loop. The only solution would be to spawn a thread for each lock to do a blocking fcntl() and then signal the main thread, but that would require pthreads. |
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blacklisting | ||
corepkgs | ||
doc | ||
externals | ||
make | ||
misc | ||
scripts | ||
src | ||
tests | ||
aterm-gc.supp | ||
AUTHORS | ||
bootstrap.sh | ||
ChangeLog | ||
configure.ac | ||
COPYING | ||
INSTALL | ||
Makefile.am | ||
nix.conf.example | ||
nix.spec.in | ||
README | ||
release.nix | ||
substitute.mk | ||
version |
Nix is a purely functional package manager. For installation and usage instructions, please read the manual, which can be found in `docs/manual/manual.html', and additionally at the Nix website at <http://nixos.org/>. Acknowledgments This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (http://www.OpenSSL.org/).