Thread.start called but threads not available
Hi,
I have compiled a java source with gcj under cygwin on win2000:
gcj -o serveur --main=serveur serveur.java
The programme gave the following message about threads not available, but
gcc seems to be compiled with threads enable.
Why ?
Thanks for help,
[jgrelet]:/s/outils/sources/serveur> ./serveur 10183
Serveur version java 1.1 port UDP : 10183
Exception in thread "main" java.lang.InternalError: Thread.start called but
threads not available
[jgrelet]:/s/outils/sources/serveur> gcc -v
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.2/specs
Configured with: /netrel/src/gcc-3.2-3/configure
--enable-languages=c,c++,f77,java --enable-libgcj --enable-threads=posix
--with-system-zlib --enable-nls --without-included-gettext
--enable-interpreter --disable-sjlj-exceptions
--disable-version-specific-runtime-libs --enable-shared
--build=i686-pc-linux --host=i686-pc-cygwin --target=i686-pc-cygwin
--enable-haifa --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc
--libdir=/usr/lib --includedir=/nonexistent/include --libexecdir=/usr/sbin
Thread model: posix
gcc version 3.2 20020927 (prerelease)
Source code is :
/* serveur.javaJ Grelet juillet 98
Test de reception de trames ethernet
*/
import java.awt.*;
import java.io.*;
import java.net.*;
import java.lang.*;
import java.applet.*;
import java.util.Date;
/
/
public class serveur {
static int PortNumber;
public static void main( String argv[] ) {
try {
PortNumber = Integer.valueOf( argv[ 0 ] ).intValue();
}
catch( ArrayIndexOutOfBoundsException e ) {
System.out.println( "\nusage : java serveur \n" );
System.exit( 0 );
}
System.out.println( "\nServeur version java 1.1 port UDP : " +
PortNumber + "\n\n" );
try {
DatagramSocket sd = new DatagramSocket( PortNumber );
receive rcv = new receive( sd );
rcv.start();
}
catch( SocketException se ) {
System.err.println( se );
}
}
}
/
/
class receive extends Thread {
DatagramSocket sd;
protected DatagramPacket pd;
static byte[] buffer = new byte[ 1024 ];
public receive( DatagramSocket s ){
sd = s;
}
/
/
public void run() {
while( true ) {
try {
pd = new DatagramPacket( buffer, buffer.length );
sd.receive( pd );
String s = new String( pd.getData(),0,pd.getLength()-2, "8859_1" );
System.out.println( s );
Thread.yield(); // le thread cede sa place au suivant
}
catch( IOException e ){
System.err.println( e );
}
} // fin de la boucle while
}
}
Jacques Grelet
Email: [EMAIL PROTECTED]
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Re: Thread.start called but threads not available
Jacques, I don't know how much of the Gnu Compiler for Java shares with the Gnu C and C++ compilers, but why do you assume that availability of threading in "gcc" implies that Java threads will be available via "gcj?" Moreover, why are you using "gcj" at all? Is there a reason the Sun J2SDK is unacceptable? It is far more mature and is eminently usable under Cygwin. I do a lot of Java work these days, so I'd be interested in hearing what is the appeal of gcj. The following paragraph was included in Chris Faylor's the release announcement for gcc 3.2.1 (Subject: "[ANNOUNCEMENT] Updated/new: gcc 3.2-1, gcc2-2.95.3-10, gcc-mingw-3.2-20020817-1"; Date: "Tue, 15 Oct 2002 17:06:20 -0400 (EDT)"): gcc 3.2-1 contains gcj which various people have reported as being either functional or broken. I'll probably strip it out of future releases and offer it separately. It seems that under Cygwin at least, "gcj" might not be ready for production use. Randall Schulz Mountain View, CA USA At 08:04 2002-11-18, Jacques Grelet wrote: Hi, I have compiled a java source with gcj under cygwin on win2000: gcj -o serveur --main=serveur serveur.java The programme gave the following message about threads not available, but gcc seems to be compiled with threads enable. Why ? Thanks for help, [jgrelet]:/s/outils/sources/serveur> ./serveur 10183 Serveur version java 1.1 port UDP : 10183 Exception in thread "main" java.lang.InternalError: Thread.start called but threads not available [jgrelet]:/s/outils/sources/serveur> gcc -v Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.2/specs Configured with: /netrel/src/gcc-3.2-3/configure --enable-languages=c,c++,f77,java --enable-libgcj --enable-threads=posix --with-system-zlib --enable-nls --without-included-gettext --enable-interpreter --disable-sjlj-exceptions --disable-version-specific-runtime-libs --enable-shared --build=i686-pc-linux --host=i686-pc-cygwin --target=i686-pc-cygwin --enable-haifa --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --includedir=/nonexistent/include --libexecdir=/usr/sbin Thread model: posix gcc version 3.2 20020927 (prerelease) Source code is : ... Jacques Grelet Email: [EMAIL PROTECTED] -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
GCJ Thread.start called but threads not available
Hi all, After i compile my java program using gcj in cygwin and execute the output file i get "Thread.start called but threads not available" When I check GCJ it seems it has been build with thread support (see below). I compile using: gcj --main=Test -g0 -o test *java A Test.java which is basicly a class with a main method which initializes a Tester object (extends Thread) and then starts it. What am I doing wrong? I have installed/upgraded to the lastest cygwin version. $ gcj -v Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.2/specs Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.2/../../../libgcj.spec rename spec lib to liborig Configured with: /netrel/src/gcc-3.2-3/configure --enable-languages=c,c++,f77,java --enable-libgcj --enable-threads=posix --with-system-zlib --enable-nls --without-included-gettext --enable-interpreter --disable-sjlj-exceptions --disable-version-specific-runtime-libs --enable-shared --build=i686-pc-linux --host=i686-pc-cygwin --target=i686-pc-cygwin --enable-haifa --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --includedir=/nonexistent/include --libexecdir=/usr/sbin Thread model: posix gcc version 3.2 20020927 (prerelease) -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
