main()
{
int element , ch ;
queue q;
char * mnu[] = {
"Insertion",
"Deletion",
"Display",
"Exit",
};
q.rear = -1;
q.front = 0;
while(1){
ch = menu(mnu,4,20,10,"****Choices****") ;
switch(ch){
case 1:puts("Enter the element to be inserted");
scanf("%d",&element);
qInsert( &q , element );
break;
case 2:if (!isEmpty(&q) ){
qDelete( &q , &element );
printf("The deleted Element is %d\n ",element );
}
else
printf("Queue Under Flow ");
break;
case 4:exit();
}
qDisplay(&q);
puts("*************** Press any key to continue ********************** ");
getch();
}
}
bool CMusikLibrary::AddSongDataFromFile( const wxString & filename )
{
//-----------------------------------------------------//
//--- we don't need to worry about duplicate files ---//
//--- because the MusikLibraryFrame will take care ---//
//--- of any conflicts. ---//
//-----------------------------------------------------//
if ( filename.IsEmpty() )
return true;
CSongMetaData MetaData;
MetaData.Filename = filename;
CMetaDataHandler::RetCode rc = CMetaDataHandler::GetMetaData( MetaData );
if(rc == CMetaDataHandler::notsupported)
{
::wxLogInfo(_("Parsing of file %s not supported. Setting title to filename."),(const wxChar *)MetaData.Filename.GetFullPath());
rc = CMetaDataHandler::success; // continue as if success
}
if(rc == CMetaDataHandler::success )
{
//--- run the query ---//
m_nCachedSongCount = -1;
MusikDb::QueryString qInsert("insert into songs values (%Q ,%d, %d, %Q, %Q, %Q, %Q, %d, %Q, %Q, %d, %d, %Q, %Q, %d, %d, julianday('now'), %d, %d ,julianday('now'));",
NULL,
(int)MetaData.eFormat,
MetaData.bVBR,
( const char* )ConvToUTF8(MetaData.Filename.GetFullPath()) ,
( const char* )MetaData.Artist,
( const char* )MetaData.Title,
( const char* )MetaData.Album,
MetaData.nTracknum,
( const char* )MetaData.Year,
( const char* )MetaData.Genre,
0,//rating
MetaData.nBitrate,
"",//lastplayed
( const char* )MetaData.Notes,//notes
0,//timesplayed
MetaData.nDuration_ms,
MetaData.nFilesize,
0); //dirty
m_pDB->Exec(qInsert);
}
else if(rc == CMetaDataHandler::fail)
{
::wxLogWarning(_("Parsing of file %s failed."),(const wxChar *)MetaData.Filename.GetFullPath());
}
else
{
wxASSERT(false);
}
return rc != CMetaDataHandler::fail;
}
// If a function is registered, it will be enqueued for execution.
// If the funciton cannot be found, an error is printed with the event name
// IMPORTANT NOTE: In the produce loop of the stream, I have to lock
// before caling this
void announceEvent( void * handle, const char * eventName, void * info ){
Handle * hand = ( Handle * ) handle;
HashTable * tab = hand->registry;
EventQueue * que = hand->cue;
hEntry * fin;
if( ( fin = hashFind( tab, ( char * )eventName ) ) != NULL ){
qInsert( que, fin->func, info );
}
else{
fprintf( stderr, "WARNING: UNHANDLED EVENT: %s\n", eventName );
}
if( pthread_cond_signal( &hand->cv ) != 0 ){
fprintf( stderr, "Error in signal.\n" );
exit( - 1 );
}
}
// Starts the event loop. While the event is still running, pop items off the queue and
// execute their functions
void startEventLoop( void * handle, void (*initialFunction )( void * ),
void * initialArgument ){
Handle * hand = ( Handle * )handle;
EventQueue * que = hand->cue;
qInsert( que, initialFunction, initialArgument );
if( pthread_mutex_lock( &hand->mu ) != 0 ){
fprintf( stderr, "Error in mutex lock.\n" );
exit( -1 );
}
while( hand->terminated != 1 ){
while( qIsEmpty( que ) == 1 ){
if( pthread_cond_wait( &hand->cv, &hand->mu ) != 0 ){
fprintf( stderr, "Error in cond_wait\n" );
exit( -1 );
}
}
if( qIsEmpty( que ) == 0 ){
qEntry * popped = qPop( que );
void ( *f )( void * ) = popped->func;
void * arg = popped->args;
free( popped );
f( arg );
}
}
if( pthread_mutex_unlock( &hand->mu ) != 0 ){
fprintf( stderr, "error in mutex unlock\n" );
exit( -1 );
}
}