Fixed bug in filewatcher
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parent
0ed49a30b0
commit
cd55994f91
2 changed files with 94 additions and 69 deletions
133
filewatcher.cc
133
filewatcher.cc
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@ -9,59 +9,55 @@ T_FilesWatcher::T_FilesWatcher( )
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: fd( inotify_init1( O_NONBLOCK ) )
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{ }
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T_FilesWatcher::T_FilesWatcher( T_FilesWatcher&& other ) noexcept
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: fd( 0 ) , watched_( std::move( other.watched_ ) )
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{
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std::swap( fd , other.fd );
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other.watched_.clear( );
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for ( T_WatchedFiles* wf : watched_ ) {
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if ( wf ) {
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wf->watcher = this;
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}
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}
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}
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T_FilesWatcher::~T_FilesWatcher( )
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{
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if ( fd ) {
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close( fd );
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}
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for ( T_WatchedFiles* wf : watched_ ) {
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if ( wf ) {
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wf->watcher = nullptr;
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}
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for ( T_WatchSet_* wf : watched_ ) {
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wf->watcher = nullptr;
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}
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}
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void T_FilesWatcher::check( )
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{
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// Reset triggered status
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for ( T_WatchedFiles* wf : watched_ ) {
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for ( T_WatchSet_* wf : watched_ ) {
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wf->triggered = false;
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}
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// Handle events from inotify
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inotify_event ie;
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while ( read( fd , &ie , sizeof( ie ) ) == sizeof( ie ) ) {
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// printf( "inotify wd %d / evt %x\n" , ie.wd , ie.mask ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( "inotify wd %d / evt %x\n" , ie.wd , ie.mask ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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if ( ( ie.mask & ( IN_CLOSE_WRITE | IN_DELETE_SELF ) ) == 0 ) {
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// printf( " -> skipping this event\n" );
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#ifdef INTRUSIVE_TRACES
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printf( " -> skipping this event\n" );
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#endif // INTRUSIVE_TRACES
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continue;
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}
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T_String const* name( inotify_.get( ie.wd ) );
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if ( !name ) {
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// printf( " -> no matching file\n" ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> no matching file\n" ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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continue;
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}
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#ifdef INTRUSIVE_TRACES
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printf( " -> file '%s'\n" , name->toOSString( ).data( ) );
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#endif // INTRUSIVE_TRACES
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auto* entry( fileWatchers_.get( *name ) );
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assert( entry );
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entry->trigger( );
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if ( ( ie.mask & IN_DELETE_SELF ) != 0 ) {
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//printf( " -> deleted, added as missing\n" ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> deleted, added as missing\n" ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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inotify_rm_watch( fd , entry->wd );
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missing_.add( *name );
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inotify_.remove( entry->wd );
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@ -72,27 +68,39 @@ void T_FilesWatcher::check( )
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// Handle missing/deleted files
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for ( auto it = missing_.begin( ) ; it < missing_.end( ) ; ++it ) {
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auto const& path( *it );
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//printf( "Checking missing file '%s'\n" , path.c_str( ) ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( "Checking missing file '%s'\n" , path.toOSString( ).data( ) ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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auto* const p( fileWatchers_.get( path ) );
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//printf( " -> found? %c\n" , p != fileWatchers_.end( ) ? 'Y' : 'N' );
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#ifdef INTRUSIVE_TRACES
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printf( " -> found? %c\n" , p ? 'Y' : 'N' );
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#endif // INTRUSIVE_TRACES
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assert( p );
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//printf( " -> wd = %d\n" , p->second.wd );
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#ifdef INTRUSIVE_TRACES
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printf( " -> wd = %d\n" , p->wd );
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#endif // INTRUSIVE_TRACES
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assert( p->wd < 0 );
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auto& we( *p );
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const auto nwd( inotify_add_watch( fd ,
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(char*) path.toOSString( ).data( ) ,
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IN_CLOSE_WRITE | IN_DELETE_SELF ) );
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//printf( " -> inotify add watch %d\n" , nwd ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> inotify add watch %d\n" , nwd ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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if ( nwd < 0 ) {
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//printf( " -> still missing\n" ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> still missing\n" ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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we.wd = -1;
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continue;
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}
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// Trigger if this was really a missing file
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if ( we.wd == -1 ) {
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//printf( " -> triggering\n" ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> triggering\n" ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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we.trigger( );
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}
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@ -108,7 +116,7 @@ void T_FilesWatcher::check( )
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void T_FilesWatcher::T_File_::trigger( )
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{
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for ( T_WatchedFiles* const wf : watchers ) {
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for ( T_WatchSet_* const wf : watchers ) {
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if ( !wf->triggered ) {
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wf->triggered = true;
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wf->callback( );
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@ -118,12 +126,16 @@ void T_FilesWatcher::T_File_::trigger( )
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void T_FilesWatcher::watchFile(
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T_String const& path ,
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T_WatchedFiles* const watcher )
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T_WatchSet_* const watcher )
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{
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//printf( "creating watch on '%s' for watcher %p\n" , path.c_str( ) , watcher ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( "creating watch on '%s' for watcher %p\n" , path.toOSString( ).data( ) , watcher ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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auto* const exFilePos( fileWatchers_.get( path ) );
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if ( exFilePos ) {
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//printf( " -> existing\n" ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> existing\n" ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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auto& wl( exFilePos->watchers );
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if ( !wl.contains( watcher ) ) {
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wl.add( watcher );
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@ -132,13 +144,19 @@ void T_FilesWatcher::watchFile(
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T_File_ f;
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f.wd = inotify_add_watch( fd , (char*) path.toOSString( ).data( ) ,
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IN_CLOSE_WRITE | IN_DELETE_SELF );
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//printf( " -> inotify wd %d\n" , f.wd ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> inotify wd %d\n" , f.wd ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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if ( f.wd == -1 ) {
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missing_.add( path );
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//printf( " -> missing\n" ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> missing\n" ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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} else {
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inotify_.add( f.wd , path );
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//printf( " -> found\n" ); fflush( stdout );
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#ifdef INTRUSIVE_TRACES
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printf( " -> found\n" ); fflush( stdout );
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#endif // INTRUSIVE_TRACES
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}
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f.watchers.add( watcher );
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fileWatchers_.add( path , std::move( f ) );
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@ -146,7 +164,7 @@ void T_FilesWatcher::watchFile(
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}
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void T_FilesWatcher::unwatchAll(
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T_WatchedFiles* const watcher )
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T_WatchSet_* const watcher )
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{
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for ( auto i = 0u ; i < fileWatchers_.size( ) ; ) {
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auto const& path( fileWatchers_.keys( )[ i ] );
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@ -176,28 +194,17 @@ void T_FilesWatcher::unwatchAll(
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}
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}
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/*----------------------------------------------------------------------------*/
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/*= T_WatchedFiles ===========================================================*/
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T_WatchedFiles::T_WatchedFiles( T_WatchedFiles&& other ) noexcept
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: watcher( other.watcher ) , callback( other.callback ) ,
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triggered( other.triggered )
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T_FilesWatcher::T_WatchSet_::T_WatchSet_( T_FilesWatcher* watcher ,
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F_OnFileChanges callback ) noexcept
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: watcher( watcher ) , callback( std::move( callback ) ) ,
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triggered( false )
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{
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if ( watcher ) {
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other.watcher = nullptr;
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*( find( watcher->watched_ , &other ) ) = this;
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}
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watcher->watched_.add( this );
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}
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T_WatchedFiles::T_WatchedFiles(
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T_FilesWatcher& watcher ,
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const F_OnFileChanges callback )
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: watcher( &watcher ) , callback( callback ) , triggered( false )
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{
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watcher.watched_.add( this );
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}
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T_WatchedFiles::~T_WatchedFiles( )
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T_FilesWatcher::T_WatchSet_::~T_WatchSet_( )
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{
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if ( watcher ) {
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watcher->unwatchAll( this );
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@ -205,20 +212,32 @@ T_WatchedFiles::~T_WatchedFiles( )
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}
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}
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/*= T_WatchedFiles ===========================================================*/
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T_WatchedFiles::T_WatchedFiles( T_WatchedFiles&& other ) noexcept
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: watchSet_( std::move( other.watchSet_ ) )
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{ }
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T_WatchedFiles::T_WatchedFiles(
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T_FilesWatcher& watcher ,
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F_OnFileChanges callback )
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: watchSet_( NewOwned< T_FilesWatcher::T_WatchSet_ >( &watcher , std::move( callback ) ) )
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{ }
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void T_WatchedFiles::clear( )
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{
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if ( watcher ) {
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watcher->unwatchAll( this );
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if ( watchSet_->watcher ) {
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watchSet_->watcher->unwatchAll( watchSet_.get( ) );
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}
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}
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bool T_WatchedFiles::watch(
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T_String const& file )
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{
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if ( !watcher ) {
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if ( !watchSet_->watcher ) {
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return false;
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}
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watcher->watchFile( file , this );
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watchSet_->watcher->watchFile( file , watchSet_.get( ) );
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return true;
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}
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@ -22,17 +22,28 @@ struct T_FilesWatcher
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friend struct T_WatchedFiles;
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T_FilesWatcher( T_FilesWatcher const& ) = delete;
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T_FilesWatcher( T_FilesWatcher&& ) = delete;
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T_FilesWatcher( );
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T_FilesWatcher( T_FilesWatcher&& ) noexcept;
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~T_FilesWatcher( );
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void check( );
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private:
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struct T_WatchSet_ {
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T_FilesWatcher* watcher;
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F_OnFileChanges callback;
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bool triggered;
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T_WatchSet_( T_FilesWatcher* watcher ,
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F_OnFileChanges callback ) noexcept;
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~T_WatchSet_( );
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};
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using P_WatchSet_ = T_OwnPtr< T_WatchSet_ >;
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struct T_File_ {
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int wd;
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T_Array< T_WatchedFiles* > watchers;
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T_Array< T_WatchSet_* > watchers;
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void trigger( );
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};
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@ -40,11 +51,11 @@ struct T_FilesWatcher
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T_KeyValueTable< T_String , T_File_ > fileWatchers_;
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T_KeyValueTable< int , T_String > inotify_;
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T_Array< T_String > missing_;
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T_Array< T_WatchedFiles* > watched_;
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T_Array< T_WatchSet_* > watched_;
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void watchFile( T_String const& path ,
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T_WatchedFiles* const watcher );
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void unwatchAll( T_WatchedFiles* const watcher );
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T_WatchSet_* const watcher );
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void unwatchAll( T_WatchSet_* const watcher );
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};
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/*----------------------------------------------------------------------------*/
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@ -57,18 +68,13 @@ struct T_WatchedFiles
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T_WatchedFiles( T_WatchedFiles const& ) = delete;
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T_WatchedFiles( T_WatchedFiles&& ) noexcept;
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T_WatchedFiles(
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T_FilesWatcher& watcher ,
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T_WatchedFiles( T_FilesWatcher& watcher ,
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const F_OnFileChanges callback );
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~T_WatchedFiles( );
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void clear( );
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bool watch( T_String const& file );
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private:
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T_FilesWatcher* watcher;
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const F_OnFileChanges callback;
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bool triggered;
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T_FilesWatcher::P_WatchSet_ watchSet_;
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};
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using P_WatchedFiles = T_OwnPtr< T_WatchedFiles >;
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