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From: "Chris Knight" <c DOT knight AT teligent DOT co DOT uk>
To: <cygwin AT cygwin DOT com>
Subject: pthread_mutex_trylock does  not lock
Date: Tue, 3 Dec 2002 09:37:41 -0000
Message-ID: <IGEKLLNAJDPOMLJGIFBIAECHCCAA.c.knight@teligent.co.uk>
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Hello,

I think I have found a problem in the "pthread_mutex_trylock" call.  When I
run the following code both the trylock and lock return immediately.  If I
compile this under RedHat 8 it works as I would expect with the trylock
locking the mutex and the lock stopping execution.

I am running the latest version of cygwin under Windows 2000 Pro with the
latest service packs.

/* -------------------------------------------------------------------------
-------- */

#include <pthread.h>

int main (void)
{
 pthread_mutex_t accessMutex = PTHREAD_MUTEX_INITIALIZER;

 printf ("Init\n");
 pthread_mutex_init(&accessMutex, NULL);

 printf ("Try lock(%d)\n", pthread_mutex_trylock(&accessMutex));

 printf ("Lock(%d)\n", pthread_mutex_lock(&accessMutex));

 printf ("We should never get here!");
}

/* -------------------------------------------------------------------------
-------- */

Chris Knight
Development, Teligent Ltd.
Office: +44 (1442) 283818
Mobile: +44 (7971) 646218
Email: c DOT knight AT teligent DOT co DOT uk


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