implab/ImplabNet Files · Implab/Parallels/SharedLock.cs

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             SharedLock.cs
        
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             / Implab / Parallels / SharedLock.cs
          
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        cin
    
Added SharedLock to synchronization routines

              r129
            
      using System;

      using System.Threading;

      using System.Diagnostics;

      namespace Implab.Parallels {

          /// <summary>

          /// Implements a lightweight mechanism to aquire a shared or an exclusive lock.

          /// </summary>

          public class SharedLock {

              readonly object m_lock = new object();

              int m_locks;

              bool m_exclusive;

              public bool LockExclusive(int timeout) {

                  lock (m_lock) {

                      if (m_locks > 0 && !Monitor.Wait(m_lock, timeout))

                          return false;

                      m_exclusive = true;

                      m_locks = 1;

        cin
    
fixed Resove method bug when calling it on already cancelled promise

              r130
            
                      return true;

        cin
    
Added SharedLock to synchronization routines

              r129
            
                  }

              }

              public void LockExclusive() {

                  LockExclusive(-1);

              }

              public bool LockShared(int timeout) {

                  lock (m_lock) {

                      if (!m_exclusive) {

                          m_locks++;

                          return true;

                      }

        cin
    
fixed Resove method bug when calling it on already cancelled promise

              r130
            
                      if (m_locks == 0) {

        cin
    
Added SharedLock to synchronization routines

              r129
            
                          m_exclusive = false;

                          m_locks = 1;

                          return true;

                      }

                      if (Monitor.Wait(m_lock, timeout)) {

                          Debug.Assert(m_locks == 0);

                          m_locks = 1;

                          m_exclusive = false;

                          return true;

                      }

                      return false;

                  }

              }

              public void LockShared() {

                  LockShared(-1);

              }

              public void ReleaseShared() {

                  lock (m_lock) {

                      if (m_exclusive || m_locks <= 0)

                          throw new InvalidOperationException();

                      m_locks--;

                      if (m_locks == 0)

                          Monitor.PulseAll(m_lock);

                  }

              }

              public void ReleaseExclusive() {

                  lock (m_lock) {

                      if (!m_exclusive && m_locks != 1)

                          throw new InvalidOperationException();

                      m_locks = 0;

                      Monitor.PulseAll(m_lock);

                  }

              }

          }

      }

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cin Added SharedLock to synchronization routines	r129	using System;
		using System.Threading;
		using System.Diagnostics;

		namespace Implab.Parallels {
		/// <summary>
		/// Implements a lightweight mechanism to aquire a shared or an exclusive lock.
		/// </summary>
		public class SharedLock {
		readonly object m_lock = new object();
		int m_locks;
		bool m_exclusive;

		public bool LockExclusive(int timeout) {
		lock (m_lock) {
		if (m_locks > 0 && !Monitor.Wait(m_lock, timeout))
		return false;
		m_exclusive = true;
		m_locks = 1;
cin fixed Resove method bug when calling it on already cancelled promise	r130	return true;
cin Added SharedLock to synchronization routines	r129	}
		}

		public void LockExclusive() {
		LockExclusive(-1);
		}

		public bool LockShared(int timeout) {
		lock (m_lock) {
		if (!m_exclusive) {
		m_locks++;
		return true;
		}

cin fixed Resove method bug when calling it on already cancelled promise	r130	if (m_locks == 0) {
cin Added SharedLock to synchronization routines	r129	m_exclusive = false;
		m_locks = 1;
		return true;
		}

		if (Monitor.Wait(m_lock, timeout)) {
		Debug.Assert(m_locks == 0);
		m_locks = 1;
		m_exclusive = false;
		return true;
		}
		return false;
		}
		}

		public void LockShared() {
		LockShared(-1);
		}

		public void ReleaseShared() {
		lock (m_lock) {
		if (m_exclusive \|\| m_locks <= 0)
		throw new InvalidOperationException();
		m_locks--;
		if (m_locks == 0)
		Monitor.PulseAll(m_lock);
		}
		}

		public void ReleaseExclusive() {
		lock (m_lock) {
		if (!m_exclusive && m_locks != 1)
		throw new InvalidOperationException();
		m_locks = 0;
		Monitor.PulseAll(m_lock);
		}
		}

		}
		}