#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='2019-05-15 16:36:21 +0200'>2019-05-15</span></td><td><a href='/guix/commit/po/doc/guix-manual.zh_CN.po?id=32747aa987bd921bc8aadc1c1d4b4da6d9bcc306'>nls: Update 'zh_CN' translation.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-04-27 10:42:15 +0200'>2019-04-27</span></td><td><a href='/guix/commit/po/doc/guix-manual.zh_CN.po?id=615b147f3a1234f801e3138c47d821cb820257b8'>nls: Fix wrong include name.</a><span class='msg-avail'>...</span></td><td>Clément Lassieur</td></tr>
<tr><td><span title='2019-04-27 00:02:15 +0200'>2019-04-27</span></td><td><a href='/guix/commit/po/doc/guix-manual.zh_CN.po?id=cdb57a831c0f778c2d856b92f875b54b91afadd7'>nls: Update 'zh_CN' translation.</a><span class='msg-avail'>...</span></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2019-04-24 00:24:07 +0200'>2019-04-24</span></td><td><a href='/guix/commit/po/doc/guix-manual.zh_CN.po?id=3068509ac12df6f2fc6e500019a4d8bbf75d32a2'>nls: Fix guix-manual.zh_CN.po.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
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