#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='2023-09-17 02:00:00 +0200'>2023-09-17</span></td><td><a href='/guix/commit/gnu/packages/w3m.scm?id=5d2593be0a9a766dfb1d93490047940b7b81d381'>gnu: w3m: Remove input labels.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/w3m.scm (w3m)[native-inputs]:
Remove input labels.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2023-09-17 02:00:00 +0200'>2023-09-17</span></td><td><a href='/guix/commit/gnu/packages/w3m.scm?id=7a898188fddc4788258894515c79ae62ad1ad766'>gnu: w3m: Add graphics support.</a><span class='msg-avail'>...<span class='msg-tooltip'>This increases the closure by a whopping 0.1 MiB.

* gnu/packages/w3m.scm (w3m)[arguments]: Add "-enable-image=fb,x11"
to the #:configure-flags.
</span></span></td><td>Tobias Geerinckx-Rice</td></tr>