From: Jan Arne Petersen <japetersen@...>
Date: 2001-07-06T08:45:49+09:00
Subject: [ruby-talk:17355] Re: Block between DEFER_INTS and ALLOW_INTS

ts wrote:

>>>>>>"J" == Jan Arne Petersen <japetersen@web.de> writes:
>>>>>>
> 
> J> What is the meaning if a block of code is between DEFER_INTS and ALLOWINTS.
> 
>  Just look at rubysig.h
> 
> #define DEFER_INTS {rb_prohibit_interrupt++;}
> #define ALLOW_INTS {rb_prohibit_interrupt--; CHECK_INTS;}
> 
> # define CHECK_INTS if (!rb_prohibit_interrupt) {\
>     if (rb_trap_pending) rb_trap_exec();\
>     if (rb_thread_pending && !rb_thread_critical) rb_thread_schedule();\
> }
> 
>  ruby will not check the interrupts for this block, nor will try to
>  re-schedule the thread.


I haven't looked at the thread-stuff so far.

> J> Is this something like synchronization in Java?
> 
>  Something like


Not really the *_INTS-block is obvious something like an atomic operation.

Jan Arne Petersen