<from .java_wrapper >
# Interpret THREADS_FLAG environment variable, if set.
DEFAULT_THREADS_FLAG=native
if [ "${THREADS_FLAG}" = green -o "${THREADS_FLAG}" = native ]; then
THREADS_TYPE="${THREADS_FLAG}_threads"
elif [ "x${THREADS_FLAG}" = x ]; then
THREADS_TYPE="${DEFAULT_THREADS_FLAG}_threads"
else
echo >&2 "Error: value \`${THREADS_FLAG}' of variable THREADS_FLAG is
illegal."
exit 1
fi
# Select HPI, and take note of VM type. Note that the assignment below does
# not mean that the assigned values are the defaults for `ttype' and
`vmtype'.
ttype=native_threads
vmtype=classic
if [ "x$1" = "x-hotspot" ]; then
# Backward compatibility: The 1.3 betas used -hotspot
# User wants HotSpot Client. Replace -hotspot with -client.
shift 1
set -- -client "$@"
fi
if [ "x$1" = "x-classic" ]; then
# User wants classic
ttype="${THREADS_TYPE}"
elif [ "x$1" = "x-green" ]; then
# User wants classic/green. Replace -green with -classic.
ttype=green_threads
shift 1
set -- -classic "$@"
elif [ "x$1" = "x-native" ]; then
# User wants classic/native. Replace -native with -classic.
ttype=native_threads
shift 1
set -- -classic "$@"
elif grep "^$1\$" ${jre}/lib/jvm.cfg > /dev/null; then
# User specified some VM type known to jvm.cfg.
vmtype=`echo $1 | cut -c 2-`
else
# User didn't specify a VM type, see if default is classic.
default=`grep -v '^#' "${jre}/lib/jvm.cfg" | head -1`
if [ "x$default" = "x-classic" ]; then
ttype="${THREADS_TYPE}"
fi
vmtype=`echo ${default} | cut -c 2-`
fi
if [ "${vmtype}" = "classic" ]; then
if [ "${ttype}" = "green_threads" ]; then
LD_BIND_NOW=yes
export LD_BIND_NOW
fi
_JVM_THREADS_TYPE=${ttype}
export _JVM_THREADS_TYPE
fi
<end from java_wrapper>
the jvm.cfg file
lists
-client
-server
-classic
... does that mean this one doesnt understand green ?
what version of the jre should i get to get green threads to work ok ?
bruno
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: vrijdag 7 juni 2002 10:58
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: how to enable green threads
> when i run the java command with option '-green' it gives this error:
>
> Green threads support not available
> Could not create the Java virtual machine.
HotSpot Server and Client VM need native threads. They cannot work
with green threads. So, you have to choose Classic VM if you want to
use green threads.
You can change the kind of JVM by modifying <JDK_HOME>/jre/lib/jvm.cfg
or supplying -classic option to the java command.
Recent JDK may not accept -green option even if you choose the Classic
VM. In that case, <JDK_HOME>/bin/.java_wrapper and
<JDK_HOME>/jre/bin/.java_wrapper are worth investigating.
Those shell scripts are invoked when you run the java command.
At least, you can choose the thread library by modifying those scripts
because the scripts determine whether threading library is used.
> so it seems that there is no support for green threads anymore in
> 'j2re-1.3.1-02b-FCS-linux-i386.bin'
Note that JDK (JRE) 1.4 does not contain the Classic VM.
Thus we cannot use green threads with 1.4.
Kazuyuki Shudo [EMAIL PROTECTED] http://www.shudo.net/
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