#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);


}
='sub'>Wojtek's customized Guix</td><td class='sub right'></td></tr></table>
<table class='tabs'><tr><td>
<a href='/guix/about/'>about</a><a href='/guix/'>summary</a><a href='/guix/refs/?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9'>refs</a><a class='active' href='/guix/log/nix/.gitignore'>log</a><a href='/guix/tree/nix/.gitignore?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9'>tree</a><a href='/guix/commit/nix/.gitignore?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9'>commit</a><a href='/guix/diff/nix/.gitignore?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/nix/.gitignore'>
<input type='hidden' name='id' value='7b39b7eb91112616a26a7b5de1d0d4782c83add9'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9'>root</a>/<a href='/guix/log/nix?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9'>nix</a>/<a href='/guix/log/nix/.gitignore?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9'>.gitignore</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/nix/.gitignore?id=7b39b7eb91112616a26a7b5de1d0d4782c83add9&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>