libgcj/117: _Jv_PthreadCheckMonitor test is not portable.

[charles dot gauthier at iit dot nrc dot ca]

>Number:         117
>Category:       libgcj
>Synopsis:       _Jv_PthreadCheckMonitor test  is not portable.
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    tromey
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Dec 08 14:50:00 PST 1999
>Closed-Date:
>Last-Modified:
>Originator:     charles.gauthier@iit.nrc.ca
>Release:        unknown-1.0
>Organization:
>Environment:
RTEMS, possibly Solaris
>Description:
On systems that do not support recursive mutexes,
pthread_mutex_trylock should not be expected to return 0 if
the caller already has locked the mutex. Unfortunately, it
may not return EDEADLK either.
>How-To-Repeat:
Startup of any application fails under RTEMS
with a java.lang.IllegalMonitorStateException exception when
calling _Jv_PrepareCompiledClass with the class that contains
the main method. Possibly the same under Solaris.
>Fix:
Partial fix is to check for a return value of EDEADLK and 
take it to mean that the caller already has locked the
mutex. Just return 0 in that case.
>Release-Note:
>Audit-Trail:
>Unformatted:
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