| private Monitor_wait ( object obj, int ms ) : bool | ||
| obj | object | |
| ms | int | |
| return | bool | |
/// <summary>Releases the lock on an object and blocks the current thread until it reacquires the lock. If the specified time-out interval elapses, the thread enters the ready queue.</summary>
/// <returns>true if the lock was reacquired before the specified time elapsed; false if the lock was reacquired after the specified time elapsed. The method does not return until the lock is reacquired.</returns>
/// <param name="obj">The object on which to wait. </param>
/// <param name="millisecondsTimeout">The number of milliseconds to wait before the thread enters the ready queue. </param>
/// <exception cref="T:System.ArgumentNullException">The <paramref name="obj" /> parameter is null. </exception>
/// <exception cref="T:System.Threading.SynchronizationLockException">The calling thread does not own the lock for the specified object. </exception>
/// <exception cref="T:System.Threading.ThreadInterruptedException">The thread that invokes Wait is later interrupted from the waiting state. This happens when another thread calls this thread's <see cref="M:System.Threading.Thread.Interrupt" /> method. </exception>
/// <exception cref="T:System.ArgumentOutOfRangeException">The value of the <paramref name="millisecondsTimeout" /> parameter is negative, and is not equal to <see cref="F:System.Threading.Timeout.Infinite" />. </exception>
/// <filterpriority>1</filterpriority>
public static bool Wait(object obj, int millisecondsTimeout)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
if (millisecondsTimeout < -1)
{
throw new ArgumentOutOfRangeException("millisecondsTimeout", "timeout out of range");
}
if (!Monitor.Monitor_test_synchronised(obj))
{
throw new SynchronizationLockException("Object is not synchronized");
}
return(Monitor.Monitor_wait(obj, millisecondsTimeout));
}
private bool WaitCore(int timeoutMs)
{
WaitEntry wait_entry = new WaitEntry();
bool mutexLocked = false;
bool waitEntryLocked = false;
try {
Monitor.try_enter_with_atomic_var(mutex, Timeout.Infinite, false, ref mutexLocked);
if (pending_signals > 0)
{
--pending_signals;
return(true);
}
wait_entry.condition = new object();
wait_entry.previous = null;
wait_entry.next = head;
if (head != null)
{
Unsafe.AsRef <WaitEntry> (head).previous = Unsafe.AsPointer <WaitEntry> (ref wait_entry);
}
head = Unsafe.AsPointer <WaitEntry> (ref wait_entry);
}
finally {
if (mutexLocked)
{
Monitor.Exit(mutex);
}
}
try {
Monitor.try_enter_with_atomic_var(wait_entry.condition, Timeout.Infinite, false, ref waitEntryLocked);
if (!wait_entry.signaled)
{
Monitor.Monitor_wait(wait_entry.condition, timeoutMs, false);
}
}
finally {
if (waitEntryLocked)
{
Monitor.Exit(wait_entry.condition);
}
}
mutexLocked = false;
try {
Monitor.try_enter_with_atomic_var(mutex, Timeout.Infinite, false, ref mutexLocked);
if (!wait_entry.signaled)
{
if (head == Unsafe.AsPointer <WaitEntry> (ref wait_entry))
{
head = wait_entry.next;
}
if (wait_entry.next != null)
{
Unsafe.AsRef <WaitEntry> (wait_entry.next).previous = wait_entry.previous;
}
if (wait_entry.previous != null)
{
Unsafe.AsRef <WaitEntry> (wait_entry.previous).next = wait_entry.next;
}
}
}
finally {
if (mutexLocked)
{
Monitor.Exit(mutex);
}
}
return(wait_entry.signaled);
}
