private Pointer[] createFSEventStream() throws IOException {
final Pointer root = cf.CFStringCreateWithCString(Pointer.NULL, "/", ENC_MAC_ROMAN); // NOI18N
if (root == Pointer.NULL) {
throw new IOException("Path creation failed."); // NOI18N
}
final Pointer arr = cf.CFArrayCreateMutable(Pointer.NULL, new NativeLong(1), Pointer.NULL);
if (arr == Pointer.NULL) {
throw new IOException("Path list creation failed."); // NOI18N
}
cf.CFArrayAppendValue(arr, root);
final Pointer eventStream =
cs.FSEventStreamCreate(
Pointer.NULL,
callback,
Pointer.NULL,
arr,
kFSEventStreamEventIdSinceNow,
LATENCY,
kFSEventStreamCreateFlagNoDefer);
if (eventStream == Pointer.NULL) {
throw new IOException("Creation of FSEventStream failed."); // NOI18N
}
final Pointer loop = cf.CFRunLoopGetCurrent();
final Pointer kCFRunLoopDefaultMode = findDefaultMode(loop);
if (kCFRunLoopDefaultMode == null) {
throw new IOException("Caller has no defaul run loop mode."); // NOI18N
}
cs.FSEventStreamScheduleWithRunLoop(eventStream, loop, kCFRunLoopDefaultMode);
if (LOG.isLoggable(DEBUG_LOG_LEVEL)) {
LOG.log(DEBUG_LOG_LEVEL, getStreamDescription(eventStream));
}
cs.FSEventStreamStart(eventStream);
return new Pointer[] {eventStream, loop};
}
private Pointer findDefaultMode(final Pointer runLoop) {
final Pointer modes = cf.CFRunLoopCopyAllModes(runLoop);
if (modes != Pointer.NULL) {
final int modesCount = cf.CFArrayGetCount(modes).intValue();
for (int i = 0; i < modesCount; i++) {
final Pointer mode = cf.CFArrayGetValueAtIndex(modes, new NativeLong(i));
if (mode != Pointer.NULL
&& DEFAULT_RUN_LOOP_MODE.equals(cf.CFStringGetCStringPtr(mode, ENC_MAC_ROMAN))) {
return mode;
}
}
}
return null;
}
public synchronized void stop() throws IOException {
if (worker == null) {
throw new IllegalStateException("FileSystemWatcher is not started."); // NOI18N
}
assert rtData != null;
assert rtData.length == 2;
assert rtData[0] != null;
assert rtData[1] != null;
cs.FSEventStreamStop(rtData[0]);
cs.FSEventStreamInvalidate(rtData[0]);
cs.FSEventStreamRelease(rtData[0]);
cf.CFRunLoopStop(rtData[1]);
worker.shutdown();
worker = null;
rtData = null;
}
private static CGGradient create(CGColorSpace space, CGColor[] colors, Object locations) {
if (colors == null) {
throw new NullPointerException("colors");
}
try (CFMutableArray colorsArray =
CFMutableArray.createMutable(null, colors.length, CoreFoundation.TypeArrayCallBacks())) {
for (CGColor c : colors) {
colorsArray.appendValue(Struct.toStruct(VoidPtr.class, c.getHandle()));
}
return create(
space,
colorsArray,
locations != null
? VM.getArrayValuesAddress(CoreGraphics.toMachineSizedFloatArray(locations))
: 0);
}
}
private String getStreamDescription(final Pointer eventStream) {
final Pointer desc = cs.FSEventStreamCopyDescription(eventStream);
return desc == Pointer.NULL ? "" : cf.CFStringGetCStringPtr(desc, ENC_MAC_ROMAN); // NOI18N
}
