fixed threading problem in file_pool

include/libtorrent/file_pool.hpp

@@ -42,6 +42,7 @@ POSSIBILITY OF SUCH DAMAGE.
 #include <boost/multi_index/member.hpp>
 #include <boost/multi_index/ordered_index.hpp>
 #include <boost/shared_ptr.hpp>
+#include <boost/thread.hpp>
 
 #ifdef _MSC_VER
 #pragma warning(pop)
@@ -95,6 +96,7 @@ namespace libtorrent
 			> file_set;
 		
 		file_set m_files;
+		boost::mutex m_mutex;
 	};
 }
 

src/file_pool.cpp

@@ -45,6 +45,7 @@ namespace libtorrent
 	{
 		assert(st != 0);
 		assert(p.is_complete());
+		boost::mutex::scoped_lock l(m_mutex);
 		typedef nth_index<file_set, 0>::type path_view;
 		path_view& pt = get<0>(m_files);
 		path_view::iterator i = pt.find(p);
@@ -93,6 +94,7 @@ namespace libtorrent
 
 	void file_pool::release(void* st)
 	{
+		boost::mutex::scoped_lock l(m_mutex);
 		assert(st != 0);
 		using boost::tie;
 
@@ -108,6 +110,7 @@ namespace libtorrent
 	{
 		assert(size > 0);
 		if (size == m_size) return;
+		boost::mutex::scoped_lock l(m_mutex);
 		m_size = size;
 		if (int(m_files.size()) <= m_size) return;