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+===============================
+ Release notes for Blosc 1.2.3
+===============================
+
+:Author: Francesc Alted
+:Contact: faltet@gmail.com
+:URL: http://www.blosc.org
+
+
+Changes from 1.2.2 to 1.2.3
+===========================
+
+- Added a `blosc_init()` and `blosc_destroy()` so that the global lock
+  can be initialized safely.  These new functions will also allow other
+  kind of initializations/destructions in the future.
+
+  Existing applications using Blosc do not need to start using the new
+  functions right away, as long as they calling `blosc_set_nthreads()`
+  previous to anything else.  However, using them is highly recommended.
+
+  Thanks to Oscar Villellas for the init/destroy suggestion, it is a
+  nice idea!
+
+
+Changes from 1.2.1 to 1.2.2
+===========================
+
+- All important warnings removed for all tested platforms.  This will
+  allow less intrusiveness compilation experiences with applications
+  including Blosc source code.
+
+- The `bench/bench.c` has been updated so that it can be compiled on
+  Windows again.
+
+- The new web site has been set to: http://www.blosc.org
+
+
+Changes from 1.2 to 1.2.1
+=========================
+
+- Fixed a problem with global lock not being initialized.  This
+  affected mostly to Windows platforms.  Thanks to Christoph
+  Gohlke for finding the cure!
+
+
+Changes from 1.1.5 to 1.2
+=========================
+
+- Now it is possible to call Blosc simultaneously from a parent threaded
+  application without problems.  This has been solved by setting a
+  global lock so that the different calling threads do not execute Blosc
+  routines at the same time.  Of course, real threading work is still
+  available *inside* Blosc itself.  Thanks to Thibault North.
+
+- Support for cmake is now included.  Linux, Mac OSX and Windows
+  platforms are supported.  Thanks to Thibault North, Antonio Valentino
+  and Mark Wiebe.
+
+- Fixed many compilers warnings (specially about unused variables).
+
+- As a consequence of the above, as minimal change in the API has been
+  introduced.  That is, the previous API::
+
+    void blosc_free_resources(void)
+
+  has changed to::
+
+    int blosc_free_resources(void)
+
+  Now, a return value of 0 means that the resources have been released
+  successfully.  If the return value is negative, then it is not
+  guaranteed that all the resources have been freed.
+
+- Many typos were fixed and docs have been improved.  The script for
+  generating nice plots for the included benchmarks has been improved
+  too.  Thanks to Valetin Haenel.
+
+
+Changes from 1.1.4 to 1.1.5
+===========================
+
+- Fix compile error with msvc compilers (Christoph Gohlke)
+
+
+Changes from 1.1.3 to 1.1.4
+===========================
+
+- Redefinition of the BLOSC_MAX_BUFFERSIZE constant as (INT_MAX -
+  BLOSC_MAX_OVERHEAD) instead of just INT_MAX.  This prevents to produce
+  outputs larger than INT_MAX, which is not supported.
+
+- `exit()` call has been replaced by a ``return -1`` in blosc_compress()
+  when checking for buffer sizes.  Now programs will not just exit when
+  the buffer is too large, but return a negative code.
+
+- Improvements in explicit casts.  Blosc compiles without warnings
+  (with GCC) now.
+
+- Lots of improvements in docs, in particular a nice ascii-art diagram
+  of the Blosc format (Valentin Haenel).
+
+- Improvements to the plot-speeds.py (Valentin Haenel).
+
+- [HDF5 filter] Adapted HDF5 filter to use HDF5 1.8 by default
+  (Antonio Valentino).
+
+- [HDF5 filter] New version of H5Z_class_t definition (Antonio Valentino).
+
+
+Changes from 1.1.2 to 1.1.3
+===========================
+
+- Much improved compression ratio when using large blocks (> 64 KB) and
+  high compression levels (> 6) under some circumstances (special data
+  distribution).  Closes #7.
+
+
+Changes from 1.1.1 to 1.1.2
+===========================
+
+- Fixes for small typesizes (#6 and #1 of python-blosc).
+
+
+Changes from 1.1 to 1.1.1
+=========================
+
+- Added code to avoid calling blosc_set_nthreads more than necessary.
+  That will improve performance up to 3x or more, specially for small
+  chunksizes (< 1 MB).
+
+
+Changes from 1.0 to 1.1
+=======================
+
+- Added code for emulating pthreads API on Windows.  No need to link
+  explicitly with pthreads lib on Windows anymore.  However, performance
+  is a somewhat worse because the new emulation layer does not support
+  the `pthread_barrier_wait()` call natively.  But the big improvement
+  in installation easiness is worth this penalty (most specially on
+  64-bit Windows, where pthreads-win32 support is flaky).
+
+- New BLOSC_MAX_BUFFERSIZE, BLOSC_MAX_TYPESIZE and BLOSC_MAX_THREADS
+  symbols are available in blosc.h.  These can be useful for validating
+  parameters in clients.  Thanks to Robert Smallshire for suggesting
+  that.
+
+- A new BLOSC_MIN_HEADER_LENGTH symbol in blosc.h tells how many bytes
+  long is the minimum length of a Blosc header.  `blosc_cbuffer_sizes()`
+  only needs these bytes to be passed to work correctly.
+
+- Removed many warnings (related with potentially dangerous type-casting
+  code) issued by MSVC 2008 in 64-bit mode.
+
+- Fixed a problem with the computation of the blocksize in the Blosc
+  filter for HDF5.
+
+- Fixed a problem with large datatypes.  See
+  http://www.pytables.org/trac/ticket/288 for more info.
+
+- Now Blosc is able to work well even if you fork an existing process
+  with a pool of threads.  Bug discovered when PyTables runs in
+  multiprocess environments.  See http://pytables.org/trac/ticket/295
+  for details.
+
+- Added a new `blosc_getitem()` call to allow the retrieval of items in
+  sizes smaller than the complete buffer.  That is useful for the carray
+  project, but certainly for others too.
+
+
+Changes from 0.9.5 to 1.0
+=========================
+
+- Added a filter for HDF5 so that people can use Blosc outside PyTables,
+  if they want to.
+
+- Many small improvements, specially in README files.
+
+- Do not assume that size_t is uint_32 for every platform.
+
+- Added more protection for large buffers or in allocation memory
+  routines.
+
+- The src/ directory has been renamed to blosc/.
+
+- The `maxbytes` parameter in `blosc_compress()` has been renamed to
+  `destsize`.  This is for consistency with the `blosc_decompress()`
+  parameters.
+
+
+Changes from 0.9.4 to 0.9.5
+===========================
+
+- Now, compression level 0 is allowed, meaning not compression at all.
+  The overhead of this mode will be always BLOSC_MAX_OVERHEAD (16)
+  bytes.  This mode actually represents using Blosc as a basic memory
+  container.
+
+- Supported a new parameter `maxbytes` for ``blosc_compress()``.  It
+  represents a maximum of bytes for output.  Tests unit added too.
+
+- Added 3 new functions for querying different metadata on compressed
+  buffers.  A test suite for testing the new API has been added too.
+
+
+Changes from 0.9.3 to 0.9.4
+===========================
+
+- Support for cross-platform big/little endian compatibility in Blosc
+  headers has been added.
+
+- Fixed several failures exposed by the extremesuite.  The problem was a
+  bad check for limits in the buffer size while compressing.
+
+- Added a new suite in bench.c called ``debugsuite`` that is
+  appropriate for debugging purposes.  Now, the ``extremesuite`` can be
+  used for running the complete (and extremely long) suite.
+
+
+Changes from 0.9.0 to 0.9.3
+===========================
+
+- Fixed several nasty bugs uncovered by the new suites in bench.c.
+  Thanks to Tony Theodore and Gabriel Beckers for their (very)
+  responsive beta testing and feedback.
+
+- Added several modes (suites), namely ``suite``, ``hardsuite`` and
+  ``extremehardsuite`` in bench.c so as to allow different levels of
+  testing.
+
+
+Changes from 0.8.0 to 0.9
+=========================
+
+- Internal format version bumped to 2 in order to allow an easy way to
+  indicate that a buffer is being saved uncompressed.  This is not
+  supported yet, but it might be in the future.
+
+- Blosc can use threads now for leveraging the increasing number of
+  multi-core processors out there.  See README-threaded.txt for more
+  info.
+
+- Added a protection for MacOSX so that it has to not link against
+  posix_memalign() funtion, which seems not available in old versions of
+  MacOSX (for example, Tiger).  At nay rate, posix_memalign() is not
+  necessary on Mac because 16 bytes alignment is ensured by default.
+  Thanks to Ivan Vilata.  Fixes #3.
+
+
+
+
+.. Local Variables:
+.. mode: rst
+.. coding: utf-8
+.. fill-column: 72
+.. End:
