B19: threads

[Fergus Henderson]

On 19-Apr-1998, Steve Biskis <mlx@san.rr.com> wrote:
> Whats the deal with all those:  _<somefunc>_r  procedures in the run-time
> that are supposed to protect the "reent" structure and make cygwinb19.dll
> thread-safe ???
> 
> I found this in the archives:

My guess is that this documentation is aimed at embedded system developers.
That probably explains the interchangable use of the words
"process" and "thread".

> 3.  What is the 2nd way of achieving reentrancy ???

Method 1:
> Use the reentrant versions of the library functions, after initializing a
> global reentrancy structure for each process. Use the pointer to this
> structure as the extra argument for all library functions.

Method 2:
> Ensure that each
> thread of execution control has a pointer to its own unique reentrancy
> structure in the global variable, _impure_ ptr, and call the standard
> library subroutines. 

-- 
Fergus Henderson <fjh@cs.mu.oz.au>  |  "I have always known that the pursuit
WWW: < http://www.cs.mu.oz.au/~fjh >  |  of excellence is a lethal habit"
PGP: finger fjh@128.250.37.3        |     -- the last words of T. S. Garp.
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