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Fix concurrency issues accessing TemporaryHost fields that could be changed by other threads

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This commit is contained in:
Cameron Gutman
2019-11-06 21:51:23 -08:00
parent 5a0e4bcc05
commit 52dcdd68c4
2 changed files with 21 additions and 18 deletions
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11
Limelight/ViewControllers/MainFrameViewController.m
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@@ -192,10 +192,11 @@ static NSMutableSet* hostList;
- (void) updateApplist:(NSSet*) newList forHost:(TemporaryHost*)host {
DataManager* database = [[DataManager alloc] init];
NSMutableSet* newHostAppList = [NSMutableSet setWithSet:host.appList];
for (TemporaryApp* app in newList) {
BOOL appAlreadyInList = NO;
for (TemporaryApp* savedApp in host.appList) {
for (TemporaryApp* savedApp in newHostAppList) {
if ([app.id isEqualToString:savedApp.id]) {
savedApp.name = app.name;
savedApp.hdrSupported = app.hdrSupported;
@@ -205,7 +206,7 @@ static NSMutableSet* hostList;
}
if (!appAlreadyInList) {
app.host = host;
[host.appList addObject:app];
[newHostAppList addObject:app];
}
}
@@ -213,7 +214,7 @@ static NSMutableSet* hostList;
do {
appWasRemoved = NO;
for (TemporaryApp* app in host.appList) {
for (TemporaryApp* app in newHostAppList) {
appWasRemoved = YES;
for (TemporaryApp* mergedApp in newList) {
if ([mergedApp.id isEqualToString:app.id]) {
@@ -225,7 +226,7 @@ static NSMutableSet* hostList;
// Removing the app mutates the list we're iterating (which isn't legal).
// We need to jump out of this loop and restart enumeration.
[host.appList removeObject:app];
[newHostAppList removeObject:app];
// It's important to remove the app record from the database
// since we'll have a constraint violation now that appList
@@ -238,6 +239,8 @@ static NSMutableSet* hostList;
// Keep looping until the list is no longer being mutated
} while (appWasRemoved);
host.appList = newHostAppList;
[database updateAppsForExistingHost:host];