[ruby-core:62857] [ruby-trunk - Bug #9884] [Open] thread_pthread.c assumes pthread_t is a scalar type

Issue #9884 has been reported by Rei Odaira.

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Bug #9884: thread_pthread.c assumes pthread_t is a scalar type
https://bugs.ruby-lang.org/issues/9884

* Author: Rei Odaira
* Status: Open
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
* ruby -v: ruby 2.2.0dev (2014-05-30 trunk 46238) [x86_64-linux]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN
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Many code lines in `thread_pthread.c` assume `pthread_t` is a scalar type. For example,

~~~
    thread_debug("ubf_select_each (%p)\n", (void *)th->thread_id);
~~~

and

~~~
    if (!timer_thread_id) {
~~~

I don't think the standard guarantees `pthread_t` is a scalar type.  z/OS defines `pthread_t` as a struct, and there seem to be other such environments.
https://sourceware.org/pthreads-win32/faq.html

I understand it could be too cumbersome to rewrite the source, assuming `pthread_t` might not be a scalar, and actually I am not sure what would be the best way to rewrite it, but I appreciate it if you guys could think of it for the maximum portability. If needed, I am willing to list the source lines to be rewritten.



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