[ruby-core:97070] [Ruby master Feature#16597] missing poll()

Issue #16597 has been updated by michals (Michal Such疣ek).

File tcp_test.rb added

There is some issue with TCP sockets:

LD_LIBRARY_PATH=. ./ruby  -I. -Ilib -I.ext/common -I.ext/x86_64-linux/ tcp_test.rb 
select: [[:@sock], [:@sock], []]
poll: [[:@sock], [:@sock], [], []]
select: [[], [:@sock], []]
poll: [[], [:@sock], [], []]

There is certainly difference between the socket open or closed but it does not appear in the error set. Maybe there is a flag missing somewhere.

----------------------------------------
Feature #16597: missing poll()
https://bugs.ruby-lang.org/issues/16597#change-84177

* Author: michals (Michal Such疣ek)
* Status: Open
* Priority: Normal
----------------------------------------
When using a socket or a pipe for writing select() cannot determine that the socket is closed. It tells you that it is ready to write but if you don't have data to write you cannot tell that it is in fact closed.

ruby internally uses poll() which can tell when a write socket is closed (without attempting a write()) but presents the broken select() interface.

---Files--------------------------------
test.rb (975 Bytes)
0001-io-move-poll-defines-to-internal-io.h.patch (3.44 KB)
0002-io-add-additional-argument-to-fd_select-calls.patch (9.54 KB)
0003-select_internal-add-additional-argument-for-poll-err.patch (4.4 KB)
0004-thread-use-poll-in-rb_fd_select.patch (3.88 KB)
0005-io-make-use-of-poll-POLLERR-flag.patch (1.24 KB)
0006-io-add-select_with_poll-class-method-when-USE_POLL.patch (2.71 KB)
0007-io-document-IO.select_with_poll.patch (2.04 KB)
tcp_test.rb (1018 Bytes)


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