I've updated the series to support FIBER_USE_NATIVE=0 (along
with the proposed fix for [Bug #13887]).

The primary change for FIBER_USE_NATIVE=0 platforms is to move
away from cross stack linked-list manipulation and use the
heap for allocations, instead.  This involved some structure
modifications to make rb_thread_fd_select work on select(2)-based
implementations.  Of course, this increases the dependency on
rb_ensure to release heap memory.

FIBER_USE_NATIVE=1 platforms are still more important and faster,
of course.

I've tested on Debian 8.x and FreeBSD 11.0.  Test reports from
other platforms appricated, thank you

Patch mbox (gzipped):

   https://80x24.org/spew/20170928004228.4538-1-e / 80x24.org/t.mbox.gz

...or "git request-pull"-generated pull request:

The following changes since commit d21aab2d3e007372973f2b803d7d8d7f9547f0cc:

  * 2017-09-28 (2017-09-27 21:55:33 +0000)

are available in the git repository at:

  git://80x24.org/ruby thriber-copy

for you to fetch changes up to 20ea4d710d3d75d946f74346e6a6f3616dac682d:

  thriber: non-native fiber support (2017-09-28 00:41:34 +0000)

----------------------------------------------------------------
Eric Wrong (3):
      thriber: green threads implemented using fibers
      thread_pthread: do not corrupt stack
      thriber: non-native fiber support

 common.mk                                          |   9 +
 configure.in                                       |  32 +
 cont.c                                             | 173 ++--
 fiber.h                                            |  54 ++
 include/ruby/io.h                                  |   2 +
 iom.h                                              |  95 +++
 iom_common.h                                       | 228 ++++++
 iom_epoll.h                                        | 710 ++++++++++++++++
 iom_internal.h                                     | 372 +++++++++
 iom_kqueue.h                                       | 907 +++++++++++++++++++++
 iom_pingable_common.h                              |  49 ++
 iom_select.h                                       | 473 +++++++++++
 prelude.rb                                         |  12 +
 process.c                                          |  15 +-
 signal.c                                           |  39 +-
 .../wait_for_single_fd/test_wait_for_single_fd.rb  |  62 ++
 test/lib/leakchecker.rb                            |   9 +
 test/ruby/test_thriber.rb                          | 274 +++++++
 thread.c                                           |  76 +-
 thread_pthread.c                                   |  10 +-
 vm.c                                               |   9 +
 vm_core.h                                          |   4 +
 22 files changed, 3541 insertions(+), 73 deletions(-)
 create mode 100644 fiber.h
 create mode 100644 iom.h
 create mode 100644 iom_common.h
 create mode 100644 iom_epoll.h
 create mode 100644 iom_internal.h
 create mode 100644 iom_kqueue.h
 create mode 100644 iom_pingable_common.h
 create mode 100644 iom_select.h
 create mode 100644 test/ruby/test_thriber.rb

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