public void runReadAction(@NotNull final Runnable action) {
/**
* if we are inside read action, do not try to acquire read lock again since it will deadlock if
* there is a pending writeAction see {@link
* com.intellij.util.concurrency.ReentrantWriterPreferenceReadWriteLock#allowReader()}
*/
if (isReadAccessAllowed()) {
action.run();
return;
}
LOG.assertTrue(
!Thread.holdsLock(PsiLock.LOCK),
"Thread must not hold PsiLock while performing readAction");
try {
myActionsLock.readLock().acquire();
} catch (InterruptedException e) {
throw new RuntimeInterruptedException(e);
}
try {
action.run();
} finally {
myActionsLock.readLock().release();
}
}
public boolean tryRunReadAction(@NotNull Runnable action) {
/**
* if we are inside read action, do not try to acquire read lock again since it will deadlock if
* there is a pending writeAction see {@link
* com.intellij.util.concurrency.ReentrantWriterPreferenceReadWriteLock#allowReader()}
*/
boolean mustAcquire = !isReadAccessAllowed();
if (mustAcquire) {
LOG.assertTrue(
myTestModeFlag || !Thread.holdsLock(PsiLock.LOCK),
"Thread must not hold PsiLock while performing readAction");
try {
if (!myActionsLock.readLock().attempt(0)) return false;
} catch (InterruptedException e) {
throw new RuntimeInterruptedException(e);
}
}
try {
action.run();
} finally {
if (mustAcquire) {
myActionsLock.readLock().release();
}
}
return true;
}
public boolean isReadAccessAllowed() {
Thread currentThread = Thread.currentThread();
return ourDispatchThread == currentThread
|| isExceptionalThreadWithReadAccess()
|| myActionsLock.isReadLockAcquired()
|| myActionsLock.isWriteLockAcquired()
|| isDispatchThread();
}
public void runWriteAction(@NotNull final Runnable action) {
assertCanRunWriteAction();
ActivityTracker.getInstance().inc();
fireBeforeWriteActionStart(action);
final AtomicBoolean stopped = new AtomicBoolean(false);
if (ourDumpThreadsOnLongWriteActionWaiting > 0) {
executeOnPooledThread(
new Runnable() {
@Override
public void run() {
while (!stopped.get()) {
try {
Thread.sleep(ourDumpThreadsOnLongWriteActionWaiting);
if (!stopped.get()) {
PerformanceWatcher.getInstance().dumpThreads(true);
}
} catch (InterruptedException ignored) {
}
}
}
});
}
LOG.assertTrue(
myActionsLock.isWriteLockAcquired(Thread.currentThread())
|| !Thread.holdsLock(PsiLock.LOCK),
"Thread must not hold PsiLock while performing writeAction");
try {
myActionsLock.writeLock().acquire();
} catch (InterruptedException e) {
throw new RuntimeInterruptedException(e);
}
stopped.set(true);
try {
myWriteActionsStack.push(action);
fireWriteActionStarted(action);
action.run();
} finally {
try {
fireWriteActionFinished(action);
myWriteActionsStack.pop();
} finally {
myActionsLock.writeLock().release();
}
}
}
public void invokeAndWait(@NotNull Runnable runnable, @NotNull ModalityState modalityState) {
if (isDispatchThread()) {
LOG.error("invokeAndWait must not be called from event queue thread");
runnable.run();
return;
}
if (isExceptionalThreadWithReadAccess()) { // OK if we're in exceptional thread.
LaterInvocator.invokeAndWait(runnable, modalityState);
return;
}
if (myActionsLock.isReadLockAcquired()) {
LOG.error("Calling invokeAndWait from read-action leads to possible deadlock.");
}
LaterInvocator.invokeAndWait(runnable, modalityState);
}
public boolean holdsReadLock() {
return myActionsLock.isReadLockAcquired();
}
public boolean isWriteAccessAllowed() {
return myActionsLock.isWriteLockAcquired(Thread.currentThread());
}