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[Playlist Loading] Process messages while loading 

Process main queue messages by handling the loading in a background
queue, and sync it to the main thread periodically, while pausing to
wait for the results. This allows the file open dialog to return
immediately, and display loading progress on the status bar.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
swiftingly
Christopher Snowhill 2022-06-28 20:26:55 -07:00
parent f8d2837c4e
commit 802a86a3d8
2 changed files with 75 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Playlist/PlaylistLoader.h
View File

@ -10,6 +10,8 @@
#import "PlaylistView.h"
#import <Cocoa/Cocoa.h>
#import <stdatomic.h>
@class PlaylistController;
@class PlaybackController;
@class PlaylistEntry;
@ -30,6 +32,9 @@ typedef enum {
BOOL metadataLoadInProgress;
NSMutableDictionary *queuedURLs;
dispatch_queue_t loaderQueue;
atomic_int loaderQueueRefCount;
}
- (void)initDefaults;

93
Playlist/PlaylistLoader.m
View File

@ -54,6 +54,9 @@ extern NSMutableDictionary<NSString *, AlbumArtwork *> *kArtworkDictionary;
[queue setMaxConcurrentOperationCount:8];
queuedURLs = [[NSMutableDictionary alloc] init];
loaderQueue = dispatch_queue_create("Playlist loader queue", DISPATCH_QUEUE_SERIAL);
atomic_init(&loaderQueueRefCount, 0);
}
return self;
@ -330,6 +333,34 @@ static inline void dispatch_sync_reentrant(dispatch_queue_t queue, dispatch_bloc
}
- (NSArray *)insertURLs:(NSArray *)urls atIndex:(NSInteger)index sort:(BOOL)sort {
int refCount;
do {
refCount = atomic_load_explicit(&loaderQueueRefCount, memory_order_relaxed);
if(refCount > 0) {
[[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.5]];
}
} while(refCount > 0);
__block NSArray *outurls = nil;
dispatch_async(loaderQueue, ^{
atomic_fetch_add(&self->loaderQueueRefCount, 1);
outurls = [self doInsertURLs:urls atIndex:index sort:sort];
atomic_fetch_sub(&self->loaderQueueRefCount, 1);
});
do {
refCount = atomic_load_explicit(&loaderQueueRefCount, memory_order_relaxed);
if(refCount > 0) {
[[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.5]];
}
} while(refCount > 0);
return outurls;
}
- (NSArray *)doInsertURLs:(NSArray *)urls atIndex:(NSInteger)index sort:(BOOL)sort {
NSMutableSet *uniqueURLs = [NSMutableSet set];
NSMutableArray *expandedURLs = [NSMutableArray array];
@ -507,14 +538,18 @@ static inline void dispatch_sync_reentrant(dispatch_queue_t queue, dispatch_bloc
progressstep = 100.0 / (double)(count);
NSInteger i = 0;
NSMutableArray *entries = [NSMutableArray arrayWithCapacity:count];
__block NSMutableArray *entries = [NSMutableArray arrayWithCapacity:count];
for(NSURL *url in validURLs) {
PlaylistEntry *pe = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:playlistController.persistentContainer.viewContext];
__block PlaylistEntry *pe;
dispatch_sync_reentrant(dispatch_get_main_queue(), ^{
pe = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:self->playlistController.persistentContainer.viewContext];
pe.url = url;
pe.index = index + i;
pe.rawTitle = [[url path] lastPathComponent];
pe.queuePosition = -1;
});
pe.url = url;
pe.index = index + i;
pe.rawTitle = [[url path] lastPathComponent];
pe.queuePosition = -1;
[entries addObject:pe];
++i;
@ -527,11 +562,15 @@ static inline void dispatch_sync_reentrant(dispatch_queue_t queue, dispatch_bloc
if(xmlData) {
for(NSDictionary *entry in [xmlData objectForKey:@"entries"]) {
PlaylistEntry *pe = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:playlistController.persistentContainer.viewContext];
__block PlaylistEntry *pe;
dispatch_sync_reentrant(dispatch_get_main_queue(), ^{
pe = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:self->playlistController.persistentContainer.viewContext];
[pe setValuesForKeysWithDictionary:entry];
pe.index = index + i;
pe.queuePosition = -1;
});
[pe setValuesForKeysWithDictionary:entry];
pe.index = index + i;
pe.queuePosition = -1;
[entries addObject:pe];
++i;
@ -542,26 +581,32 @@ static inline void dispatch_sync_reentrant(dispatch_queue_t queue, dispatch_bloc
NSIndexSet *is = [NSIndexSet indexSetWithIndexesInRange:NSMakeRange(index, [entries count])];
[playlistController insertObjects:entries atArrangedObjectIndexes:is];
dispatch_sync_reentrant(dispatch_get_main_queue(), ^{
[self->playlistController insertObjects:entries atArrangedObjectIndexes:is];
});
if(xmlData && [[xmlData objectForKey:@"queue"] count]) {
[playlistController emptyQueueList:self];
dispatch_sync_reentrant(dispatch_get_main_queue(), ^{
[self->playlistController emptyQueueList:self];
i = 0;
for(NSNumber *index in [xmlData objectForKey:@"queue"]) {
NSInteger indexVal = [index intValue] + j;
PlaylistEntry *pe = [entries objectAtIndex:indexVal];
pe.queuePosition = i;
pe.queued = YES;
long i = 0;
for(NSNumber *index in [xmlData objectForKey:@"queue"]) {
NSInteger indexVal = [index intValue] + j;
PlaylistEntry *pe = [entries objectAtIndex:indexVal];
pe.queuePosition = i;
pe.queued = YES;
[[playlistController queueList] addObject:pe];
[[self->playlistController queueList] addObject:pe];
++i;
}
++i;
}
});
}
// Clear the selection
[playlistController setSelectionIndexes:[NSIndexSet indexSet]];
dispatch_sync_reentrant(dispatch_get_main_queue(), ^{
[self->playlistController setSelectionIndexes:[NSIndexSet indexSet]];
});
{
NSArray *arrayFirst = @[[entries objectAtIndex:0]];
@ -582,7 +627,9 @@ static inline void dispatch_sync_reentrant(dispatch_queue_t queue, dispatch_bloc
if([arrayRest count])
[self performSelectorInBackground:@selector(loadInfoForEntries:) withObject:arrayRest];
else {
[playlistController commitPersistentStore];
dispatch_sync_reentrant(dispatch_get_main_queue(), ^{
[self->playlistController commitPersistentStore];
});
[self completeProgress];
}
return entries;