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#ifndef __GC_H
#define __GC_H
#include "util.hh"
/* Garbage collector operation. */
typedef enum { gcReturnLive, gcReturnDead, gcDeleteDead } GCAction;
/* If `action' is set to `soReturnLive', return the set of paths
reachable from (i.e. in the closure of) the specified roots. If
`action' is `soReturnDead', return the set of paths not reachable
from the roots. If `action' is `soDeleteDead', actually delete the
latter set. */
void collectGarbage(const PathSet & roots, GCAction action,
PathSet & result);
/* Register a temporary GC root. This root will automatically
disappear when this process exits. */
void addTempRoot(const Path & path);
#endif /* !__GC_H */
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