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Message-ID:	<001501c2aa0b$cd7934b0$3c01a8c0@jungle>
From:	"Jim" <jbuckeyne AT greater DOT net>
To:	"antreas z" <antreas_z AT hotmail DOT com>, <cygwin AT cygwin DOT com>
References:	<F29AZEHCIRjWZpyZCv500022968 AT hotmail DOT com>
Subject:	Re: semaphores
Date:	Sun, 22 Dec 2002 14:45:17 -0800
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not supported in official lines, and rumor has it there's a replacement in
the works, but noone's claiming ownership of said project.

http://www.neuro.gatech.edu/users/cwilson/cygutils/cygipc/

----- Original Message -----
From: "antreas z" <antreas_z AT hotmail DOT com>
To: <cygwin AT cygwin DOT com>
Sent: Sunday, December 22, 2002 10:43 AM
Subject: semaphores


>
>
>
> hi.I'm new to this project and i have much more to learn about it.But i
have
> a very urgent question.When i try to compile the following code which is
> compiled succesfully on a Sun Unix maschine i get the following error
> synch.h no such file
> sys/ipc.h no such file
> sema_t undeclared.
> Can u tell me which libraries i have to work with so that i can use
> semaphores??
> thanx.
>
> #include <synch.h>
> #include <sys/types.h>
> #include <sys/ipc.h>
>
> extern int errno;
> main()
> {
> /*sema_t spreal; */
> sema_t sp;
> int retval;
>
>   /* Initialize the semaphore. */
>   retval = sema_init(&sp,2, USYNC_PROCESS, (void*)0 );
>   if (retval != 0) {
> perror("Couldn't initialize.");
> exit(3);
>   }
>
>   retval = sema_trywait(&sp);
>   printf("Did trywait. Returned %d >\n", retval); getchar();
>
>   retval = sema_trywait(&sp);
>   printf("Did trywait. Returned %d >\n", retval); getchar();
>
>   retval = sema_trywait(&sp);
>   printf("Did trywait. Returned %d >\n", retval); getchar();
>
>   sema_destroy(&sp);
>
> }
>
>
>
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