--- Coro/Changes	2016/06/25 19:22:33	1.661
+++ Coro/Changes	2021/06/24 19:10:06	1.691
@@ -5,7 +5,93 @@
 TODO: __GCC_HAVE_DWARF2_CFI_ASM
 TODO: swap_sv, maybe add scope_swap_sv?
 TODO: croak when async_pool tries to run canceled thread?
+TODO: how to debug safe_cancel failure (vebrose mode? show how to make backtrace?)
+TODO: scalar context for Coro::AIO wrappers?
 
+TODO: State.xs could short-circuit some macros such as CORO_EXECUTE_SLF
+TODO: use frame->destroy to improve Coro::EV
+
+TODO: concurrent ->recv on same condvar
+sub Coro::AnyEvent::CondVar::_send {
+   if ($_[0]{_ae_coro}) {
+      $_->ready
+         for values %{ delete $_[0]{_ae_coro} }
+   }
+};
+
+sub Coro::AnyEvent::CondVar::_wait {
+   until ($_[0]{_ae_sent}) {
+      $AnyEvent::CondVar::Base::WAITING = 0; # avoid recursive check by AnyEvent
+      local $_[0]{_ae_coro}{$Coro::current+0} = $Coro::current;
+      Coro::schedule;
+   }
+};
+
+
+6.57  Wed Jul 29 15:08:44 CEST 2020
+	- override AnyEvent condvar methods "properly", as AnyEvent
+          has support for pluggable condvars since 2011. This also
+          avoids problems with recursive waits by avoiding to mix
+          impl methods with coro code.
+	- allow rouse_wait to be called in a different thread.
+        - slightly clarify rouse_cb/rouse_wait documentation.
+	- slightly improve rouse callback performance and memory usage.
+        - try to report correct calller when throwing exception in
+          on $condvar->recv, not a useless line in Coro::AnyEvent.
+
+6.56  Thu Feb 20 19:40:07 CET 2020
+	- Coro::EV::time*once functions used ev_once, which is not cancelable.
+          This could cause problems due to I/O watchers not being stopped up
+          on exceptions/cancellation.
+
+6.55  Fri Jul 19 17:28:09 CEST 2019
+	- Coro::RWLock woke up only one reader instead of all after a wrlock
+          (analyzed and patch by Maxim Skorobogatov).
+        - slightly improved documentation of Coro::RWLock and RWLock testcase.
+        - quickly (re)-ported to minix 3.3 before minix crashed again.
+
+6.54  Sun Dec 16 11:06:07 CET 2018
+	- reinstate Coro::Select::select prototype - it breaks more than it fixes.
+
+6.53  Sun Dec 16 10:33:15 CET 2018
+	- the autogenerated prototypes of Coro::AIO now add ";" at the end
+          to avoid generating named unary operators and messing up parsing
+          (mostly affects aio_mlockall 4 | 8 which was parsed as
+          (aio_mlockall 4) | 8).
+        - do not use a prototype for select in Coro::Select, as CORE::select also
+          doesn't have one.
+
+6.52  Tue Aug 14 18:49:43 CEST 2018
+	- libcoro update: allow sharing of coro threads using the pthreads
+          backend among different pthreads, as is required by Coro::Multicore.
+	- always allow ->call and ->eval when the coro is the current coroutine. this
+          makes it possible, among other things, to call these on $Coro::main.
+	- minor code cleanups.
+
+6.514 Thu Aug 31 18:25:31 CEST 2017
+	- safe_cancel no longer croaks when called on already-destroyed
+          thread, but instead "just works".
+
+6.513 Sat Jul 15 01:18:51 CEST 2017
+	- experimental 5.22 comaptibility changes (PadlistNAMES).
+	- removed attributes example and made sure the other examples
+          still work.
+        - fix some statevar types for newer perls, should be of no consequence.
+
+6.512 Fri Jul 14 05:03:17 CEST 2017
+        - seems to pass test suite down till 5.8.9, so make this the
+          minimum requirement in Makefile.PL.
+	- experimental 5.24 compatibility changes (SUB_ARGARRAY).
+        - experimental 5.26 compatibility changes (PL_comppad -> PADOFFSET).
+        - disable FORTIFY_SOURCE to avoid broken (but well-intentioned)
+          fortified longjmp variants in some libcs.
+	- re-try JIT allocation without PROT_EXEC, to hopefully improve
+          portability (still doesn't seem to work around broken selinux
+          mmap everywhere).
+        - speling fixes (Xavier Guimard).
+
+6.511 Sun Jun 26 23:44:50 CEST 2016
+	- make it compile with threaded perls again.
 	- simplify and speed up __DIE__ and __WARN__ handling.
 
 6.51 Sat Jun 25 20:57:20 CEST 2016