Change the way memory is allocated (as discussed partly in private).

  * src/mpfr-gmp.c, src/mpfr-gmp.h, src/mpfr-impl.h: update.
  * src/free_cache.c, src/mpfr.h: added mpfr_mp_memory_cleanup function.
  * NEWS: describe API change.
  * TODO: added 2 related items (future clean-up and feature).
  * doc/mpfr.texi: update.
  * tests/talloc-cache.c: take API change into account.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@11807 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 11 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 3f380b38b..dfe594656 100644
--- a/NEWS
+++ b/NEWS
@@ -23,6 +23,17 @@ http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
 Changes from versions 3.1.* to version 4.0.0:
 - The "dinde aux marrons" release.
 - MPFR now depends on GMP 5.0+ instead of 4.1+.
+- API change:
+  Applications that call GMP's mp_set_memory_functions function to change
+  the allocators must first call the new function mpfr_mp_memory_cleanup
+  in all threads where MPFR is potentially used; this new function is
+  currently equivalent to mpfr_free_cache.
+  The reason is that the way memory allocation is done by MPFR has changed
+  (again), so that the current GMP allocators are used (since for some
+  applications, the old allocators may become invalid).
+  Note: Freeing the caches like this might have a performance impact on some
+  particular applications; if this is an issue, this could be handled for a
+  future MPFR version.
 - Mini-gmp support via the --enable-mini-gmp configure option (experimental).
 - The minimum precision MPFR_PREC_MIN is now 1, with rounding defined as
   in the next IEEE 754 revision (ties rounded away from zero).