#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='2019-07-08 16:21:48 -0400'>2019-07-08</span></td><td><a href='/guix/commit/gnu/packages/dbm.scm?id=883fe9bb913ac284c6ec203b41fc22cb6212c337'>gnu: bdb: Add 4.8.30.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dbm.scm (bdb-4.8): New variable.
[arguments]: Configure and build from 'build_unix' directory as
mentioned in documentation.
(bdb-5.3): Inherit from bdb-4.8.
(bdb-6): Inherit from bdb-4.8.
(bdb): Point to bdb-6.
</span></span></td><td>Carl Dong</td></tr>
<tr><td><span title='2019-02-11 19:48:31 +0100'>2019-02-11</span></td><td><a href='/guix/commit/gnu/packages/dbm.scm?id=fe82194394137bbd617d474d3a3b58783afb0470'>gnu: gdbm: Update to 1.18.1.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/dbm.scm (gdbm): Update to 1.18.1.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-01-16 16:08:22 +0100'>2019-01-16</span></td><td><a href='/guix/commit/gnu/packages/dbm.scm?id=255d1bbe777a824be726edeb9fd47458a3a877a9'>gnu: Move dbm databases to new module.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/databases.scm (gdbm, bdb, bdb-5.3): Move from here...
* gnu/packages/dbm.scm: ...to this new module.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add it.
* gnu/packages/audio.scm,
gnu/packages/avahi.scm,
gnu/packages/backup.scm,
gnu/packages/cobol.scm,
gnu/packages/cyrus-sasl.scm,
gnu/packages/databases.scm,
gnu/packages/finance.scm,
gnu/packages/game-development.scm,
gnu/packages/gnome.scm,
gnu/packages/guile.scm,
gnu/packages/ibus.scm,
gnu/packages/kerberos.scm,
gnu/packages/linux.scm,
gnu/packages/mail.scm,
gnu/packages/man.scm,
gnu/packages/nvi.scm,
gnu/packages/openldap.scm,
gnu/packages/package-management.scm,
gnu/packages/php.scm,
gnu/packages/pulseaudio.scm,
gnu/packages/python.scm,
gnu/packages/rdf.scm,
gnu/packages/ruby.scm,
gnu/packages/sawfish.scm: Update module references.
</span></span></td><td>Ricardo Wurmus</td></tr>