mirror of
https://github.com/NixOS/nix
synced 2024-09-20 11:11:03 -04:00
5c38c863bd
Nix-env failed to call addPermRoot(), which is necessary to safely
add a new root. So if nix-env started after and finished before the
garbage collector, the user environment (plus all other new stuff)
it built might be garbage collected, leading to a dangling symlink
chain in ~/.nix-profile...
* Be more explicit if we block on the GC lock ("waiting for the big
garbage collector lock...").
* Don't loop trying to create a new generation. It's not necessary
anymore since profiles are locked nowadays.
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
#ifndef __GC_H
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#define __GC_H
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#include "types.hh"
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namespace nix {
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/* Garbage collector operation. */
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typedef enum {
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gcReturnRoots,
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gcReturnLive,
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gcReturnDead,
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gcDeleteDead,
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gcDeleteSpecific,
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} GCAction;
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/* If `action' is set to `gcReturnRoots', find and return the set of
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roots for the garbage collector. These are the store paths
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symlinked to in the `gcroots' directory. If `action' is
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`gcReturnLive', return the set of paths reachable from (i.e. in the
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closure of) the roots. If `action' is `gcReturnDead', return the
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set of paths not reachable from the roots. If `action' is
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`gcDeleteDead', actually delete the latter set. */
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void collectGarbage(GCAction action, const PathSet & pathsToDelete,
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bool ignoreLiveness, PathSet & result, unsigned long long & bytesFreed);
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/* Register a temporary GC root. This root will automatically
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disappear when this process exits. WARNING: this function should
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not be called inside a BDB transaction, otherwise we can
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deadlock. */
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void addTempRoot(const Path & path);
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/* Remove the temporary roots file for this process. Any temporary
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root becomes garbage after this point unless it has been registered
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as a (permanent) root. */
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void removeTempRoots();
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/* Register a permanent GC root. */
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Path addPermRoot(const Path & storePath, const Path & gcRoot,
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bool indirect, bool allowOutsideRootsDir = false);
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}
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#endif /* !__GC_H */
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