#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='2024-07-19 00:47:12 +0300'>2024-07-19</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=04c704285ea143a1e8646a02e49433f1c953c171'>gnu: nsncd: Remove duplicate definition.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2024-07-19 00:44:46 +0300'>2024-07-19</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=33ac515dda75300472c3771631bc9d9a50e57858'>gnu: rust-slog-async-2: Update to 2.8.0.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2024-06-02 20:52:26 +0200'>2024-06-02</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=2e53fa5346bf52f6d6d26e035bc905ebd410dabb'>gnu: Add nsncd.</a><span class='msg-avail'>...</span></td><td>Picnoir</td></tr>
<tr><td><span title='2024-05-29 21:55:18 -0400'>2024-05-29</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=c9e3806ec1686f348f2ac5d88cf65daed74a721b'>gnu: nss/fixed: Hasten test suite.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-05-13 12:01:46 +0100'>2024-05-13</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=31d1cc82b325d8b17e21c5a22e9aea6c24cffe90'>gnu: nss/fixed: Tweak performance test.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2024-04-28 10:01:29 -0400'>2024-04-28</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=3875bb1e4442df18a25e1f898c10c4f1f6f6adb0'>gnu: nss/fixed: Update to 3.99.</a><span class='msg-avail'>...</span></td><td>Ian Eure</td></tr>
<tr><td><span title='2024-04-26 07:05:50 -0400'>2024-04-26</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=e584ff08b162c46ef587daca438e97d56bc20b32'>gnu: nss: Graft with version 3.98 [security fixes].</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-04-26 07:05:49 -0400'>2024-04-26</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=eb239e4793fb7b93c14ef52fedca01d2b01de0a0'>gnu: nss-3.98: Streamline source origin via inheritance.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-04-24 09:43:06 +0800'>2024-04-24</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=fb86bf658a9374d41b05c5e586bfc6a3150cc3cb'>gnu: nss: Fix cross-compilation.</a><span class='msg-avail'>...</span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-04-24 09:43:06 +0800'>2024-04-24</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=452e7673bfeb0a14cecb8e760dda2c436aa69047'>gnu: nspr: Fix cross-compilation.</a><span class='msg-avail'>...</span></td><td>Zheng Junjie</td></tr>
<tr><td><span title='2024-04-12 14:21:38 +0300'>2024-04-12</span></td><td><a href='/guix/commit/gnu/packages/nss.scm?id=0824fa0d6924249c09a3d5f9613d1758ab91198d'>gnu: Add nss-3.98.</a><span class='msg-avail'>...</span></td><td>Ian Eure</td></tr>