Imported Upstream version 3.2.2

[debian/gnuradio] / gruel / src / lib / thread_group.cc

diff --git a/gruel/src/lib/thread_group.cc b/gruel/src/lib/thread_group.cc
new file mode 100644 (file)
index 0000000..fa78567
--- /dev/null
+++ b/gruel/src/lib/thread_group.cc
@@ -0,0 +1,99 @@
+/* -*- c++ -*- */
+/*
+ * Copyright (C) 2001-2003 William E. Kempf
+ * Copyright (C) 2007 Anthony Williams
+ * Copyright 2008 Free Software Foundation, Inc.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying 
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+/*
+ * This was extracted from Boost 1.35.0 and fixed.
+ */
+
+#include <gruel/thread_group.h>
+
+namespace gruel
+{
+  thread_group::thread_group()
+  {
+  }
+
+  thread_group::~thread_group()
+  {
+    // We shouldn't have to scoped_lock here, since referencing this object
+    // from another thread while we're deleting it in the current thread is
+    // going to lead to undefined behavior any way.
+    for (std::list<boost::thread*>::iterator it = m_threads.begin();
+        it != m_threads.end(); ++it)
+      {
+       delete (*it);
+      }
+  }
+
+  boost::thread* thread_group::create_thread(const boost::function0<void>& threadfunc)
+  {
+    // No scoped_lock required here since the only "shared data" that's
+    // modified here occurs inside add_thread which does scoped_lock.
+    std::auto_ptr<boost::thread> thrd(new boost::thread(threadfunc));
+    add_thread(thrd.get());
+    return thrd.release();
+  }
+
+  void thread_group::add_thread(boost::thread* thrd)
+  {
+    boost::lock_guard<boost::shared_mutex> guard(m_mutex);
+
+    // For now we'll simply ignore requests to add a thread object multiple
+    // times. Should we consider this an error and either throw or return an
+    // error value?
+    std::list<boost::thread*>::iterator it = std::find(m_threads.begin(),
+                                                      m_threads.end(), thrd);
+    BOOST_ASSERT(it == m_threads.end());
+    if (it == m_threads.end())
+      m_threads.push_back(thrd);
+  }
+
+  void thread_group::remove_thread(boost::thread* thrd)
+  {
+    boost::lock_guard<boost::shared_mutex> guard(m_mutex);
+
+    // For now we'll simply ignore requests to remove a thread object that's
+    // not in the group. Should we consider this an error and either throw or
+    // return an error value?
+    std::list<boost::thread*>::iterator it = std::find(m_threads.begin(),
+                                                      m_threads.end(), thrd);
+    BOOST_ASSERT(it != m_threads.end());
+    if (it != m_threads.end())
+      m_threads.erase(it);
+  }
+
+  void thread_group::join_all()
+  {
+    boost::shared_lock<boost::shared_mutex> guard(m_mutex);
+    for (std::list<boost::thread*>::iterator it = m_threads.begin();
+        it != m_threads.end(); ++it)
+      {
+       (*it)->join();
+      }
+  }
+
+  void thread_group::interrupt_all()
+  {
+    boost::shared_lock<boost::shared_mutex> guard(m_mutex);
+    for(std::list<boost::thread*>::iterator it=m_threads.begin(),end=m_threads.end();
+       it!=end;
+       ++it)
+      {
+       (*it)->interrupt();
+      }
+  }
+
+  size_t thread_group::size() const
+  {
+    boost::shared_lock<boost::shared_mutex> guard(m_mutex);
+    return m_threads.size();
+  }
+
+} // namespace gruel