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Date:	Sun, 23 Nov 2008 12:05:12 +0100
From:	Vaclav Haisman <v DOT haisman AT sh DOT cvut DOT cz>
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Subject:	Re: pthread_t
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John Emmas wrote:
> I'm trying to compile a program in which pthread_t is expected to be
> 
> typedef long unsigned int pthread_t;
The program is wrong. The pthread_t type is opaque. You should not
expect anything.

> 
> the program builds fine under Linux but when I try to compile under
> Cygwin I see this error:-
> 
>    conflicting declaration 'typedef long unsigned int pthread_t'
>    pthread_t has a previous declaration of
>    'typedef struct __pthread_t* pthread_t'
> 
> The file, /usr/include/cygwin/types.h does define it like this, although
> /usr/include/sys/types.h defines it differently:-
> 
> typedef __uint32_t pthread_t
> 
> which seems a bit closer to what I was expecting.
> 
> I just wondered which declaration I should really be using for cygwin?  The
> declaration in sys/types.h or the one in cygwin/types.h ?
The only header that you should use to get pthread_t type is pthread.h.

> 
> Thanks,
> 
> John
> 

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