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* song: converted typedef Song to struct songMax Kellermann2008-10-081-6/+7
| | | | Again, a data type which can be forward-declared.
* directory: converted typedef Directory to struct directoryMax Kellermann2008-10-081-28/+33
| | | | | The struct can be forward-declared by other headers, which relaxes the header dependencies.
* update: merged exploreDirectory() into updateDirectory()Max Kellermann2008-10-081-1/+1
| | | | | | exploreDirectory() duplicates some code in updateDirectory(). Merge both functions, and use directory_is_empty() to determine whether update or explore mode should be used.
* directory: added directory_is_empty()Max Kellermann2008-10-081-1/+1
| | | | | directory_is_empty() is a tiny inline function which determine if a directory has any child objects (sub directories or songs).
* directory: moved code to update.cMax Kellermann2008-10-081-575/+17
| | | | | | The source directory.c mixes several libraries: directory object management, database management and database update, resulting in a 1000+ line monster. Move the whole database update code to update.c.
* directory: fix return value in removeDeletedFromDirectoryEric Wong2008-10-071-1/+1
| | | | oops :x
* directory: serialize song deletes from playlist during updateEric Wong2008-10-071-3/+28
| | | | | | | | | | | | | | | | This makes the update code thread-safe and doesn't penalize the playlist code by complicating it with complicated and error-prone locks (and the associated overhead, not everybody has a thread-implementation as good as NPTL). The update task blocks during the delete; but the update task is a slow task anyways so we can block w/o people caring too much. This was also our only freeSong call site, so remove that function. Note that deleting entire directories is not fully thread-safe, yet; as their traversals are not yet locked.
* directory: use songvec_for_each for iteratorsEric Wong2008-10-071-28/+30
| | | | Get rid of songvec_write so we can enforce proper locking
* dbUtils/directory: traverseAllIn forEachSong returns -1 on errorEric Wong2008-10-071-12/+9
| | | | Being consistent with most UNIX functions...
* Assert if we don't have song or song->url setEric Wong2008-10-071-2/+2
| | | | song objects cannot exist without a path or URL
* song: stop storing song_typeEric Wong2008-10-061-1/+1
| | | | | | | We already know if a song is a URL or not based on whether it has parentDir defined or not. Hopefully one day in the future we can drop HTTP support from MPD entirely when an HTTP filesystem comes along and we can access streams via open(2).
* song: use flex arrays to store song->urlEric Wong2008-10-061-1/+1
| | | | | | Reduce the number of allocations we make, so there's less pressure on the allocator and less overhead to keep track of the allocations in.
* directory: reuse existing directory if found on updateEric Wong2008-10-061-4/+9
| | | | | | | | | Instead of allocating a new one, just reuse an existing one if one is found when rereading the DB. This is a small makes the previous commit work on subdirectories of the root music directory. [1] "song: better handling of existing songs when rereading DB"
* directory: simplify list update handling logicEric Wong2008-10-061-45/+60
| | | | | | | | | | | | | | Now the "update" command can be issued multiple times regardless of whether the client is in list mode or not. We serialize the update tasks to prevent updates from trampling over each other and will spawn another update task once the current one is finished updating and reaped. Right now we cap the queue size to 32 which is probably enough (I bet most people usually run update with no argument anyways); but we can make it grow/shrink dynamically if needed. There'll still be a hard-coded limit to prevent DoS attacks, though.
* directory: streamline deletesEric Wong2008-10-061-17/+15
| | | | | Instead of relying on the shortname, just pass the song pointer to prevent redundant lookups during deletes.
* directory: isRootDirectory() is a one-linerEric Wong2008-09-291-4/+1
| | | | Improving the signal to noise ratio...
* directory: writeDirectoryInfo propagates errorsEric Wong2008-09-291-21/+19
| | | | | If a write failed, it's a good sign subsequent writes will fail, too, so propgate errors all the way up the stack.
* directory: make it clear that DIRECTORY_MTIME is deprecatedEric Wong2008-09-291-1/+1
| | | | A long time ago in an mpd far away...
* directory: remove "Mp3" referencesEric Wong2008-09-291-17/+17
| | | | | MPD has supported more audio formats than just MP3 for over five years...
* directory: remove shortname arguments everywhereEric Wong2008-09-291-80/+41
| | | | | | It was a huge confusing mess of parameter passing around and around. Add a few extra assertions to ensure we're handling parent/child relationships properly.
* directory: replace DirectoryList with dirvecEric Wong2008-09-291-195/+96
| | | | | Small memory reduction compared to songvec since most users have much fewer dirs than songs, but still nice to have.
* directory: remove unused CPP definesEric Wong2008-09-291-4/+0
| | | | We no longer for for updates
* songvec_free => songvec_destroyEric Wong2008-09-291-1/+1
| | | | | "free" implies the songvec structure itself is freed, which is not the case.
* directory.c: kill unnecessary includesEric Wong2008-09-291-4/+1
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* directory: update playlist version if updatedEric Wong2008-09-291-1/+6
| | | | | | | | | | | | If we updated the mpd metadata database; then there's a chance some of those songs in the playlist will have updated metadata. So be on the safe side and increment the playlist version number if _any_ song changed (this is how all released versions of mpd did it, too). This bug was introduced recently when making "update" threaded. Thanks to stonecrest for the bug report.
* directory: fix leak introduced with threaded updateEric Wong2008-09-231-1/+1
| | | | | Use freeList() instead of free() to free all elements in the list.
* Remove EINTR checking for open(2)Eric Wong2008-09-231-1/+1
| | | | | | open(2) should only interrupt on "slow" devices, afaik... [mk: still using fopen()]
* directory: don't leak file handles if we get a corrupt dbEric Wong2008-09-231-1/+1
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* directory: update do its work inside a threadEric Wong2008-09-231-106/+50
| | | | | | | | | A lot of the preparation was needed (and done in previous months) in making update thread-safe, but here it is. This was the first thing I made work inside a thread when I started mpd-uclinux many years ago, and also the last thing I've done in mainline mpd to work inside a thread, go figure.
* directory: use enum update_return for return values IIMax Kellermann2008-09-231-16/+21
| | | | Converted some more functions and their callers to enum update_return.
* directory: use enum update_return for return valuesEric Wong2008-09-231-72/+49
| | | | This way we avoid having to document -1, 0, 1
* workaround race condition on updates with broken signal blockingEric Wong2008-09-231-39/+50
| | | | | | | | | pthreads with our existing signal blocking/handling is broken, for now just sleep a bit in the child to prevent the CHLD handler from being called too early. Also, improve error reporting when handling SIGCHLD by storing the status to be called in the main task (which can be logged, since we can't do logging inside the sig handler).
* Replace SongList with struct songvecEric Wong2008-09-231-47/+47
| | | | | | | Our linked-list implementation is wasteful and the SongList isn't modified enough to benefit from being a linked list. So use a more compact array of song pointers which saves ~200K on a library with ~9K songs (on x86-32).
* directory: remove unused updateMp3Directory() functionEric Wong2008-09-231-18/+0
| | | | | | | | | | | | It hasn't been used in many years commit 3a89afdd80f228139554372a83a9d74486acf691 Author: Warren Dukes <warren.dukes@gmail.com> Date: Sat Nov 20 20:28:32 2004 +0000 remove --update-db option (SVN r2719)
* start using prefixcmp()Eric Wong2008-09-231-15/+8
| | | | | LOC reduction and less noise makes things easier for tired old folks to follow.
* Directory: don't allocate stat information dynamicallyEric Wong2008-09-231-44/+19
| | | | | | | This should save a few thousand ops. Not worth it to malloc for such a small (3-words on 32-bit ARM and x86) structures. Signed-off-by: Eric Wong <normalperson@yhbt.net>
* pass "struct client" to dbUtils.c, song.c, tag_print.cMax Kellermann2008-09-071-7/+6
| | | | | | Don't pass the raw file descriptor around. This migration patch is rather large, because all of the sources have inter dependencies - we have to change all of them at the same time.
* directory: don't pass "fd" to updateInit()Max Kellermann2008-09-071-11/+4
| | | | Again, move error handling to command.c.
* directory: printDirectoryInfo() does not call commandError()Max Kellermann2008-09-071-3/+1
| | | | Move another ocurrence of error handling over to command.c.
* directory: don't pass fd to traverseAllIn()Max Kellermann2008-09-071-7/+5
| | | | | | | | This patch continues the work of the previous patch: don't pass a file descriptor at all to traverseAllIn(). Since this fd was only used to report "directory not found" errors, we can easily move that check to the caller. This is a great relief, since it removes the dependency on a client connection from a lot of enumeration functions.
* directory: don't pass fd to traverseAllIn() callbacksMax Kellermann2008-09-071-12/+11
| | | | | | | | | | Database traversal should be generic, and not bound to a client connection. This is the first step: no file descriptor for the callback functions forEachSong() and forEachDir(). If a callback needs the file descriptor, it has to be passed in the void*data pointer somehow; some callbacks might need a new struct for passing more than one parameter. This might look a bit cumbersome right now, but our goal is to have a clean API.
* song: moved code to song_print.c, song_save.cMax Kellermann2008-09-071-0/+2
| | | | | | | Move everything which dumps song information (via tag_print.c) to a separate source file. song_print.c gets code which writes song data to the client; song_save.c is responsible for serializing songs from the tag cache.
* dbUtils, playlist, directory: pass constant pointersMax Kellermann2008-09-061-2/+2
| | | | The usual bunch of const pointer conversions.
* tag: static directory nameMax Kellermann2008-08-291-5/+3
| | | | | | While parsing the tag cache, don't allocate the directory name from the heap, but copy it into a buffer on the stack. This reduces heap fragmentation by 1%.
* client: renamed all public functionsMax Kellermann2008-08-281-1/+1
| | | | | | Functions which operate on the whole client list are prefixed with "client_manager_", and functions which handle just one client just get "client_".
* renamed interface.c to client.cMax Kellermann2008-08-281-1/+1
| | | | | | | I don't believe "interface" is a good name for something like "connection by a client to MPD", let's call it "client". This is the first patch in the series which changes the name, beginning with the file name.
* include cleanupMax Kellermann2008-08-281-0/+1
| | | | Only include headers which are really needed.
* clean up CPP includesMax Kellermann2008-04-121-6/+2
| | | | | | | | | Try to only include headers which are really needed. We should particularly check all "headers including other headers". The long-term goal is to have a manageable, small API for plugins (decoders, output) without so many mpd internals cluttering the namespace. git-svn-id: https://svn.musicpd.org/mpd/trunk@7319 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* Initial cut of fork() => pthreads() for decoder and playerEric Wong2008-04-121-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I initially started to do a heavy rewrite that changed the way processes communicated, but that was too much to do at once. So this change only focuses on replacing the player and decode processes with threads and using condition variables instead of polling in loops; so the changeset itself is quiet small. * The shared output buffer variables will still need locking to guard against race conditions. So in this effect, we're probably just as buggy as before. The reduced context-switching overhead of using threads instead of processes may even make bugs show up more or less often... * Basic functionality appears to be working for playing local (and NFS) audio, including: play, pause, stop, seek, previous, next, and main playlist editing * I haven't tested HTTP streams yet, they should work. * I've only tested ALSA and Icecast. ALSA works fine, Icecast metadata seems to get screwy at times and breaks song advancement in the playlist at times. * state file loading works, too (after some last-minute hacks with non-blocking wakeup functions) * The non-blocking (*_nb) variants of the task management functions are probably overused. They're more lenient and easier to use because much of our code is still based on our previous polling-based system. * It currently segfaults on exit. I haven't paid much attention to the exit/signal-handling routines other than ensuring it compiles. At least the state file seems to work. We don't do any cleanups of the threads on exit, yet. * Update is still done in a child process and not in a thread. To do this in a thread, we'll need to ensure it does proper locking and communication with the main thread; but should require less memory in the end because we'll be updating the database "in-place" rather than updating a copy and then bulk-loading when done. * We're more sensitive to bugs in 3rd party libraries now. My plan is to eventually use a master process which forks() and restarts the child when it dies: locking and communication with the main thread; but should require less memory in the end because we'll be updating the database "in-place" rather than updating a copy and then bulk-loading when done. * We're more sensitive to bugs in 3rd party libraries now. My plan is to eventually use a master process which forks() and restarts the child when it dies: master - just does waitpid() + fork() in a loop \- main thread \- decoder thread \- player thread At the beginning of every song, the main thread will set a dirty flag and update the state file. This way, if we encounter a song that triggers a segfault killing the main thread, the master will start the replacement main on the next song. * The main thread still wakes up every second on select() to check for signals; which affects power management. [merged r7138 from branches/ew] git-svn-id: https://svn.musicpd.org/mpd/trunk@7240 09075e82-0dd4-0310-85a5-a0d7c8717e4f
* fix -Wconst warningsMax Kellermann2008-02-051-30/+38
| | | | | | [ew: cleaned up the dirty union hack a bit] Signed-off-by: Eric Wong <normalperson@yhbt.net> git-svn-id: https://svn.musicpd.org/mpd/trunk@7180 09075e82-0dd4-0310-85a5-a0d7c8717e4f
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