#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><th>author</th><td>宋文武 &lt;iyzsong@member.fsf.org&gt;</td><td class='right'>2023-07-29 10:53:19 +0800</td></tr>
<tr><th>committer</th><td>宋文武 &lt;iyzsong@member.fsf.org&gt;</td><td class='right'>2023-08-03 17:38:10 +0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/gnu/packages/enlightenment.scm?id=fe638b48e9204fd736908467c21e1d2a95828701'>fe638b48e9204fd736908467c21e1d2a95828701</a> (<a href='/guix/patch/gnu/packages/enlightenment.scm?id=fe638b48e9204fd736908467c21e1d2a95828701'>patch</a>)</td></tr>
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<div class='commit-subject'>gnu: granatier: Update to 23.04.3.</div><div class='commit-msg'>* gnu/packages/kde-games.scm (granatier): Update to 23.04.3.
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