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https://github.com/gnustep/libs-base.git
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85 lines
2 KiB
C
85 lines
2 KiB
C
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/* Code to start up a helper and wait for it to confirm it's ready to proceed
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* The helper must write someting to stdout to indicate its readiness.
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*/
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#if GNUSTEP
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@interface HelperListener : NSObject
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{
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@public
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BOOL done;
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BOOL active;
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}
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- (void) helperRead: (NSNotification*)n;
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@end
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@implementation HelperListener
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- (void) helperRead: (NSNotification*)n
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{
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NSDictionary *u = [n userInfo];
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NSData *d;
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d = [u objectForKey: NSFileHandleNotificationDataItem];
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if ([d length] > 0)
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{
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active = YES;
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}
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done = YES;
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}
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@end
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@implementation NSTask (TestHelper)
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+ (NSTask*) launchedHelperWithLaunchPath: (NSString*)_path
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arguments: (NSArray*)_args
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timeout: (NSTimeInterval)_wait
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{
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NSTask *t = [NSTask new];
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ENTER_POOL
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NSNotificationCenter *c = [NSNotificationCenter defaultCenter];
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NSPipe *p = [NSPipe pipe];
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NSFileHandle *h = [p fileHandleForReading];
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HelperListener *l = AUTORELEASE([HelperListener new]);
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NSDate *d;
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if (_wait <= 0.0)
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{
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_wait = 5.0;
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}
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d = [NSDate dateWithTimeIntervalSinceNow: _wait];
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[t setLaunchPath: _path];
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[t setArguments: _args];
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[t setStandardOutput: p];
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[t launch];
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[c addObserver: l
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selector: @selector(helperRead:)
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name: NSFileHandleReadCompletionNotification
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object: h];
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[h readInBackgroundAndNotify];
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while (NO == l->done && [d timeIntervalSinceNow] > 0.0)
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{
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[[NSRunLoop currentRunLoop] runMode: NSDefaultRunLoopMode
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beforeDate: d];
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}
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[c removeObserver: l
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name: NSFileHandleReadCompletionNotification
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object: h];
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[h closeFile];
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if (NO == l->done)
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{
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NSLog(@"Helper task %@ failed to start up in time.", _path);
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[t terminate];
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[t waitUntilExit];
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t = nil;
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}
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else if (NO == l->active)
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{
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NSLog(@"Helper task %@ failed to start (and ended).", _path);
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[t terminate];
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[t waitUntilExit];
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t = nil;
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}
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LEAVE_POOL
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return AUTORELEASE(t);
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}
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@end
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#endif /* GNUSTEP */
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