+++ /dev/null
-///////////////////////////////////////////////////////////////////////////
-//
-// Copyright (c) 2005, Industrial Light & Magic, a division of Lucas
-// Digital Ltd. LLC
-//
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the name of Industrial Light & Magic nor the names of
-// its contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-///////////////////////////////////////////////////////////////////////////
-
-#ifndef INCLUDED_ILM_THREAD_POOL_H
-#define INCLUDED_ILM_THREAD_POOL_H
-
-//-----------------------------------------------------------------------------
-//
-// class Task, class ThreadPool, class TaskGroup
-//
-// Class ThreadPool manages a set of worker threads and accepts
-// tasks for processing. Tasks added to the thread pool are
-// executed concurrently by the worker threads.
-//
-// Class Thread provides an abstract interface for a task which
-// a ThreadPool works on. Derived classes need to implement the
-// execute() function which performs the actual task.
-//
-// Class TaskTroup allows synchronization on the completion of a set
-// of tasks. Every task that is added to a ThreadPool belongs to a
-// single TaskGroup. The destructor of the TaskGroup waits for all
-// tasks in the group to finish.
-//
-// Note: if you plan to use the ThreadPool interface in your own
-// applications note that the implementation of the ThreadPool calls
-// opertor delete on tasks as they complete. If you define a custom
-// operator new for your tasks, for instance to use a custom heap,
-// then you must also write an appropriate operator delete.
-//
-//-----------------------------------------------------------------------------
-
-namespace IlmThread {
-
-class TaskGroup;
-class Task;
-
-
-class ThreadPool
-{
- public:
-
- //-------------------------------------------------------
- // Constructor -- creates numThreads worker threads which
- // wait until a task is available.
- //-------------------------------------------------------
-
- ThreadPool (unsigned numThreads = 0);
-
-
- //-----------------------------------------------------------
- // Destructor -- waits for all tasks to complete, joins all
- // the threads to the calling thread, and then destroys them.
- //-----------------------------------------------------------
-
- virtual ~ThreadPool ();
-
-
- //--------------------------------------------------------
- // Query and set the number of worker threads in the pool.
- //
- // Warning: never call setNumThreads from within a worker
- // thread as this will almost certainly cause a deadlock
- // or crash.
- //--------------------------------------------------------
-
- int numThreads () const;
- void setNumThreads (int count);
-
-
- //------------------------------------------------------------
- // Add a task for processing. The ThreadPool can handle any
- // number of tasks regardless of the number of worker threads.
- // The tasks are first added onto a queue, and are executed
- // by threads as they become available, in FIFO order.
- //------------------------------------------------------------
-
- void addTask (Task* task);
-
-
- //-------------------------------------------
- // Access functions for the global threadpool
- //-------------------------------------------
-
- static ThreadPool& globalThreadPool ();
- static void addGlobalTask (Task* task);
-
- struct Data;
-
- protected:
-
- Data * _data;
-};
-
-
-class Task
-{
- public:
-
- Task (TaskGroup* g);
- virtual ~Task ();
-
- virtual void execute () = 0;
- TaskGroup * group();
-
- protected:
-
- TaskGroup * _group;
-};
-
-
-class TaskGroup
-{
- public:
-
- TaskGroup();
- ~TaskGroup();
-
- struct Data;
- Data* const _data;
-};
-
-
-} // namespace IlmThread
-
-#endif
projects / opencv / blobdiff