Version 1.2.1 (14 August 2008)

• add support for the libstdc++ parallel_mode (successor of MCSTL), new make targets: library_g++_pmode, tests_g++_pmode, clean_g++_pmode (requires g++ 4.3.2 or later)
• new stxxl file type stxxl::mem_file (for debugging purposes only), helps debugging with valgrind because no memory cell ever leaves valgrind's control
• properly destroy the singleton objects (block manager, disk queue threads, logger, stats, config, ...) at program exit
• fixed a bug (recursive locking) in recursive block allocation
• added a test program for recursive block allocation
• sensible dependencies for nmake (MSVC): only rebuild files as necessary
• improve performance of createdisks
• human-readable output for I/O stats
• replace hard coded min/max values by std::numeric_limits<>::min/max in examples
• fix a case where only half of the available memory was used during recursive merging
• verify stxxl::set_seed() functionality in tests
• remove stxxl disk files created from default configuration (no .stxxl file found) and other temporary files at program end
• stop using deprecated functions, switch to the replacements instead
• unify the mutex lock handling by introducing stxxl::scoped_mutex_lock
• unify the I/O wait time counting to work like read/write time counting
• simplify I/O time counting with scoped_{read,write,wait}_timer
• add some more tests
• more code cleanup + reformatting
• move some more code to the library
• reduce some include dependencies
• build system tuning
• propagate region deletion (when blocks are freed) to the file level
• fix problem in sorters where blocks were released too early
• specialize is_sorted() to use const_vector_iterators, no extra writes
• add c++0x style const_iterator cbegin()/cend() to all containers