#pragma once

#include "types.hh"


namespace nix {


/* Open (possibly create) a lock file and return the file descriptor.
   -1 is returned if create is false and the lock could not be opened
   because it doesn't exist.  Any other error throws an exception. */
int openLockFile(const Path & path, bool create);

/* Delete an open lock file. */
void deleteLockFile(const Path & path, int fd);

enum LockType { ltRead, ltWrite, ltNone };

bool lockFile(int fd, LockType lockType, bool wait);


class PathLocks 
{
private:
    typedef std::pair<int, Path> FDPair;
    list<FDPair> fds;
    bool deletePaths;

public:
    PathLocks();
    PathLocks(const PathSet & paths,
        const string & waitMsg = "");
    bool lockPaths(const PathSet & _paths,
        const string & waitMsg = "",
        bool wait = true);
    ~PathLocks();
    void unlock();
    void setDeletion(bool deletePaths);
};


bool pathIsLockedByMe(const Path & path);


}
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<tr><td><span title='2021-10-15 17:30:55 +0200'>2021-10-15</span></td><td><a href='/guix/commit/gnu/packages/rpm.scm?id=83aa4969ec9b5b03cc2f48f7c94e098cc563f8c5'>gnu: createrepo-c: Update to 0.17.4.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2021-07-29 22:03:34 -0400'>2021-07-29</span></td><td><a href='/guix/commit/gnu/packages/rpm.scm?id=daeef2e7f4f36df7a098c9aee7c03546d8691d39'>gnu: Add createrepo-c.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-07-29 22:03:34 -0400'>2021-07-29</span></td><td><a href='/guix/commit/gnu/packages/rpm.scm?id=0413e90ab15cd1a40f6edba390967bb76a5f8181'>gnu: Add libmodulemd.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2021-07-29 22:03:34 -0400'>2021-07-29</span></td><td><a href='/guix/commit/gnu/packages/rpm.scm?id=4613a9948a7814e877bc6421d7cec3cc267ec928'>gnu: Add drpm.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>