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2008-04-12Initial cut of fork() => pthreads() for decoder and playerEric Wong1-19/+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
2008-01-26fixed -Wshadow warningsMax Kellermann1-1/+1
Signed-off-by: Eric Wong <normalperson@yhbt.net> git-svn-id: https://svn.musicpd.org/mpd/trunk@7143 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-01-03Cleanup #includes of standard system headers and put them in one placeEric Wong1-8/+1
This will make refactoring features easier, especially now that pthreads support and larger refactorings are on the horizon. Hopefully, this will make porting to other platforms (even non-UNIX-like ones for masochists) easier, too. os_compat.h will house all the #includes for system headers considered to be the "core" of MPD. Headers for optional features will be left to individual source files. git-svn-id: https://svn.musicpd.org/mpd/trunk@7130 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2007-08-27removing debug messages from signal handlersJ. Alexander Treuman1-1/+1
As unfortunate as it is to remove such useful debugging messages, it's necessary to fix a potential deadlock with signal handling. A bunch of functions the debug functions call aren't safe to call from a signal handler. There are some alternate solutions, but they're neither pretty nor simple. So just remove them entirely for now. git-svn-id: https://svn.musicpd.org/mpd/trunk@6828 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2007-04-05The massive copyright updateAvuton Olrich1-1/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@5834 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-08-20Fix warnings for -Wmissing-prototypesAvuton Olrich1-1/+1
Add -Wmissing-prototypes if compiling with gcc Static where possible git-svn-id: https://svn.musicpd.org/mpd/trunk@4657 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-08-08more sparse cleanupsEric Wong1-10/+7
* less-commonly compiled things like ao/mvp outputs * Adding -Wno-transparent-union to SPARSE_FLAGS makes it check inside decode.c, directory.c, player.c, and sig_handlers.c * remove unused variables leftover from the master process in sig_handlers.c git-svn-id: https://svn.musicpd.org/mpd/trunk@4598 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-08-06merge changes from mpd-tree:Warren Dukes1-90/+1
-use tree for tagTracker -eliminate the master process git-svn-id: https://svn.musicpd.org/mpd/trunk@4571 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-08-01logging cleanupsEric Wong1-1/+1
* Moved all logging-related stuff into log.c (and not myfprintf.c) * ISO C90-compliant strftime usage: %e and %R replaced with %d and %H:%M respectively * Got rid of variadic macros since some old-school compilers don't like them * compiling with -DNDEBUG disables the DEBUG() macro git-svn-id: https://svn.musicpd.org/mpd/trunk@4512 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-07-20Add mpd-indent.shAvuton Olrich1-92/+110
Indent the entire tree, hopefully we can keep it indented. git-svn-id: https://svn.musicpd.org/mpd/trunk@4410 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-07-18Initialize sigaction.sa_mask to an empty set in a few places we forgot toJ. Alexander Treuman1-0/+3
git-svn-id: https://svn.musicpd.org/mpd/trunk@4400 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-07-14Change shank's email addressJ. Alexander Treuman1-1/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@4333 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-07-13Huge header update, update the copyright and addAvuton Olrich1-1/+1
the GPL header where necessary git-svn-id: https://svn.musicpd.org/mpd/trunk@4317 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2005-11-18DJWLindenaar's fix race condition and some memory leaks patchQball Cow1-1/+12
git-svn-id: https://svn.musicpd.org/mpd/trunk@3681 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2005-11-16DJWLindenaar balanced tree and master process patchQball Cow1-3/+78
git-svn-id: https://svn.musicpd.org/mpd/trunk@3669 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2005-03-19fix some signal handlingWarren Dukes1-6/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@3101 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2005-03-08now player and decoder processes should only exit() when receiving term ↵Warren Dukes1-1/+6
signal from their respective parent processes git-svn-id: https://svn.musicpd.org/mpd/trunk@3034 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-11-03new setSigHandlersForDecoder() function, and be sure player/decode processes ↵Warren Dukes1-0/+16
ignore SIGHUP signals git-svn-id: https://svn.musicpd.org/mpd/trunk@2492 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-11-02a few extra strerror()'s sprinkled in the codeWarren Dukes1-1/+0
git-svn-id: https://svn.musicpd.org/mpd/trunk@2467 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-06-05new command, plchanges, and also add Num: to songinfo of playlistinfoWarren Dukes1-1/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@1339 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-06-04add mackstann to (c)Warren Dukes1-0/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@1338 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-15log cycling and a few cleanupsWarren Dukes1-0/+3
git-svn-id: https://svn.musicpd.org/mpd/trunk@772 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-14don't updatedb on sighup if db is being updatedWarren Dukes1-2/+4
git-svn-id: https://svn.musicpd.org/mpd/trunk@768 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-14add vim shiznit to end of all source filesWarren Dukes1-0/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@750 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-13have update process ignore signals when writing dbWarren Dukes1-0/+14
git-svn-id: https://svn.musicpd.org/mpd/trunk@735 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-13block signals when writing db to ensure db isn't corruptedWarren Dukes1-0/+4
git-svn-id: https://svn.musicpd.org/mpd/trunk@730 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-13when doing signal functions (like sigaction) make sure it wasn't interrupted ↵Warren Dukes1-4/+4
by a signal (errno==EINTR) git-svn-id: https://svn.musicpd.org/mpd/trunk@729 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-12forgetting to increment playlist version after reading the dbWarren Dukes1-0/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@704 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-11clean up signal handling using a polling method, from the genius that is ↵Warren Dukes1-42/+30
mackstann git-svn-id: https://svn.musicpd.org/mpd/trunk@697 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-11do while(wait3) for sighandlerWarren Dukes1-2/+2
git-svn-id: https://svn.musicpd.org/mpd/trunk@680 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-11fix some snafoosWarren Dukes1-3/+0
git-svn-id: https://svn.musicpd.org/mpd/trunk@678 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-11make "update" command background/non-blockingWarren Dukes1-2/+21
git-svn-id: https://svn.musicpd.org/mpd/trunk@665 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-11add --only-create-db option from msellsWarren Dukes1-1/+10
have SIGHUP cause rereading db file git-svn-id: https://svn.musicpd.org/mpd/trunk@663 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2004-04-02use EXIT_SUCCESS and EXIT_FAILUREWarren Dukes1-1/+1
git-svn-id: https://svn.musicpd.org/mpd/trunk@591 09075e82-0dd4-0310-85a5-a0d7c8717e4f
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