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Re: [Plplot-general] Is PLPlot thread safe?
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From: Ali M. <so...@sy...> - 2004-11-10 14:33:18
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Hi Arjen,
I am trying to open up more than one plot. It looks like octave binding =
does allows this but I have not been able to do it so far.=20
I am using one thread per plot. Is there any example or sample =
explaining how to launch multiple plots?
I tried the following test program.=20
/*
* Created on Nov 5, 2004
*
*/
package plplot.examples;
import plplot.core.PLStream;
/**
* @author Ali
*
*/
public class Test extends Thread {
static {
System.load("c:\\jmatlab\\jmatlab\\jplplot.dll");
}
=20
public void run() {
PLStream pls =3D new PLStream();
pls.sdev("win3");
pls.init();
double[] x =3D new double[] {1.0, 2.0, 3.0};
double[] y =3D new double[] {1.0, 2.0, 3.0};
pls.col0(1);
pls.env(0.0, 10.0, 0.0, 10.0, 0, 1);
pls.col0(2);
pls.poin(x, y, 0);
pls.flush();
pls.end1();
}
=20
public static void main(String[] args) {
Test t =3D new Test();
t.start();
t =3D new Test();
t.start();
}
}
In run mode only one one shows up and when I close the window I get =
following error message.=20
*** PLPLOT ERROR ***
plcol0: Please call plinit first, aborting operation
*** PLPLOT ERROR ***
plenv: Please call plinit first, aborting operation
*** PLPLOT ERROR ***
plcol0: Please call plinit first, aborting operation
*** PLPLOT ERROR ***
plpoin: Please set up window first, aborting operation
*** PLPLOT ERROR ***
plcol0: Please call plinit first, aborting operation
*** PLPLOT ERROR ***
plstyl: Please call plinit first, aborting operation
*** PLPLOT ERROR ***
plpat: Please call plinit first, aborting operation
In the debug mode, it shows both plots and one closing them I get =
following errors
An unexpected exception has been detected in native code outside the VM.
Unexpected Signal : EXCEPTION_ACCESS_VIOLATION (0xc0000005) occurred at =
PC=3D0x1D1B34FF
Function=3D[Unknown.]
Library=3DC:\jmatlab\jmatlab\jplplot.dll
NOTE: We are unable to locate the function name symbol for the error
just occurred. Please refer to release documentation for possible
reason and solutions.
Current Java thread:
at plplot.core.plplotjavacJNI.plend1(Native Method)
at plplot.core.plplotjavac.plend1(plplotjavac.java:74)
at plplot.core.PLStream.end1(PLStream.java:193)
at plplot.examples.Test.run(Test.java:30)
Dynamic libraries:
0x00400000 - 0x00407000 C:\Program Files\Java\j2re1.4.2_03\bin\javaw.exe
0x77F80000 - 0x77FFD000 C:\WINNT\system32\ntdll.dll
0x7C2D0000 - 0x7C332000 C:\WINNT\system32\ADVAPI32.dll
0x7C570000 - 0x7C623000 C:\WINNT\system32\KERNEL32.DLL
0x77D30000 - 0x77DA1000 C:\WINNT\system32\RPCRT4.DLL
0x77E10000 - 0x77E75000 C:\WINNT\system32\USER32.dll
0x77F40000 - 0x77F7B000 C:\WINNT\system32\GDI32.DLL
0x78000000 - 0x78046000 C:\WINNT\system32\MSVCRT.dll
0x75E60000 - 0x75E7A000 C:\WINNT\system32\IMM32.DLL
0x6CA60000 - 0x6CA68000 C:\WINNT\system32\LPK.DLL
0x66650000 - 0x666A4000 C:\WINNT\system32\USP10.dll
0x08000000 - 0x08138000 C:\Program =
Files\Java\j2re1.4.2_03\bin\client\jvm.dll
0x77570000 - 0x775A0000 C:\WINNT\system32\WINMM.dll
0x10000000 - 0x10007000 C:\Program Files\Java\j2re1.4.2_03\bin\hpi.dll
0x007F0000 - 0x007FE000 C:\Program =
Files\Java\j2re1.4.2_03\bin\verify.dll
0x00800000 - 0x00819000 C:\Program Files\Java\j2re1.4.2_03\bin\java.dll
0x00820000 - 0x0082D000 C:\Program Files\Java\j2re1.4.2_03\bin\zip.dll
0x18170000 - 0x1818C000 C:\Program Files\Java\j2re1.4.2_03\bin\jdwp.dll
0x1C190000 - 0x1C195000 C:\Program =
Files\Java\j2re1.4.2_03\bin\dt_socket.dll
0x75030000 - 0x75043000 C:\WINNT\system32\ws2_32.dll
0x75020000 - 0x75028000 C:\WINNT\system32\WS2HELP.DLL
0x1C1A0000 - 0x1C1AA000 C:\Program Files\Aventail\Connect\asnsp.dll
0x1C2C0000 - 0x1C2CD000 C:\Program Files\Aventail\Connect\amtshr32.dll
0x1C3E0000 - 0x1C3F3000 C:\Program Files\Aventail\Connect\pso32.dll
0x75050000 - 0x75058000 C:\WINNT\system32\WSOCK32.dll
0x76620000 - 0x76630000 C:\WINNT\system32\MPR.dll
0x1C510000 - 0x1C5D2000 C:\Program Files\Aventail\Connect\asres.dll
0x1C5E0000 - 0x1C5EE000 C:\Program Files\Aventail\Connect\s5log.dll
0x30400000 - 0x30425000 C:\Program Files\Aventail\Connect\cfglib32.dll
0x30300000 - 0x3031E000 C:\Program Files\Aventail\Connect\ccache32.dll
0x76B30000 - 0x76B6D000 C:\WINNT\system32\comdlg32.dll
0x63180000 - 0x631E4000 C:\WINNT\system32\SHLWAPI.DLL
0x71780000 - 0x7180A000 C:\WINNT\system32\COMCTL32.DLL
0x782F0000 - 0x78535000 C:\WINNT\system32\SHELL32.DLL
0x782C0000 - 0x782CC000 C:\WINNT\System32\rnr20.dll
0x77980000 - 0x779A4000 C:\WINNT\system32\DNSAPI.DLL
0x77340000 - 0x77353000 C:\WINNT\system32\iphlpapi.dll
0x77520000 - 0x77525000 C:\WINNT\system32\ICMP.DLL
0x77320000 - 0x77337000 C:\WINNT\system32\MPRAPI.DLL
0x75150000 - 0x7515F000 C:\WINNT\system32\SAMLIB.DLL
0x75170000 - 0x751BF000 C:\WINNT\system32\NETAPI32.DLL
0x77BE0000 - 0x77BEF000 C:\WINNT\system32\SECUR32.DLL
0x751C0000 - 0x751C6000 C:\WINNT\system32\NETRAP.DLL
0x77950000 - 0x77978000 C:\WINNT\system32\WLDAP32.DLL
0x77A50000 - 0x77B3F000 C:\WINNT\system32\OLE32.DLL
0x779B0000 - 0x77A4B000 C:\WINNT\system32\OLEAUT32.DLL
0x773B0000 - 0x773DE000 C:\WINNT\system32\ACTIVEDS.DLL
0x77380000 - 0x773A2000 C:\WINNT\system32\ADSLDPC.DLL
0x77830000 - 0x7783E000 C:\WINNT\system32\RTUTILS.DLL
0x77880000 - 0x7790D000 C:\WINNT\system32\SETUPAPI.DLL
0x7C0F0000 - 0x7C151000 C:\WINNT\system32\USERENV.DLL
0x774E0000 - 0x77512000 C:\WINNT\system32\RASAPI32.DLL
0x774C0000 - 0x774D1000 C:\WINNT\system32\RASMAN.DLL
0x77530000 - 0x77552000 C:\WINNT\system32\TAPI32.DLL
0x77360000 - 0x77379000 C:\WINNT\system32\DHCPCSVC.DLL
0x777E0000 - 0x777E8000 C:\WINNT\System32\winrnr.dll
0x1CD90000 - 0x1CDA7000 =
C:\WINNT\system32\Hummingbird\Connectivity\7.00\Socks\hclsock5.dll
0x777F0000 - 0x777F5000 C:\WINNT\system32\rasadhlp.dll
0x74FD0000 - 0x74FED000 C:\WINNT\system32\msafd.dll
0x75010000 - 0x75017000 C:\WINNT\System32\wshtcpip.dll
0x1D180000 - 0x1D1CD000 C:\jmatlab\jmatlab\jplplot.dll
0x60000000 - 0x60045000 C:\WINNT\system32\MSCTF.dll
0x1D550000 - 0x1D557000 C:\Program Files\Lotus\SameTime =
Client\autoaway.dll
0x77920000 - 0x77943000 C:\WINNT\system32\imagehlp.dll
0x72A00000 - 0x72A2D000 C:\WINNT\system32\DBGHELP.dll
0x690A0000 - 0x690AB000 C:\WINNT\system32\PSAPI.DLL
Heap at VM Abort:
Heap
def new generation total 576K, used 237K [0x10010000, 0x100b0000, =
0x104f0000)
eden space 512K, 46% used [0x10010000, 0x1004b5d0, 0x10090000)
from space 64K, 0% used [0x10090000, 0x10090000, 0x100a0000)
to space 64K, 0% used [0x100a0000, 0x100a0000, 0x100b0000)
tenured generation total 1408K, used 0K [0x104f0000, 0x10650000, =
0x14010000)
the space 1408K, 0% used [0x104f0000, 0x104f0000, 0x104f0200, =
0x10650000)
compacting perm gen total 4096K, used 1084K [0x14010000, 0x14410000, =
0x18010000)
the space 4096K, 26% used [0x14010000, 0x1411f368, 0x1411f400, =
0x14410000)
Local Time =3D Wed Nov 10 09:16:10 2004
Elapsed Time =3D 13
#
# The exception above was detected in native code outside the VM
#
# Java VM: Java HotSpot(TM) Client VM (1.4.2_03-b02 mixed mode)
#
# An error report file has been saved as hs_err_pid1788.log.
# Please refer to the file for further information.
#
----- Original Message -----=20
From: "Arjen Markus" <arj...@wl...>
To: "Ali Muhammad" <so...@sy...>
Cc: <plp...@li...>
Sent: Wednesday, November 10, 2004 2:36 AM
Subject: Re: [Plplot-general] Is PLPlot thread safe?
> Ali Muhammad wrote:
> >
> > Hi,
> >
> > I am using java binding on windows. I span a new thread for a plot. =
I
was
> > wondering if the C code is thread safe.
> >
> > Please advise
> >
> > Regards,
> >
> > -Ali
> >
>
> Ali,
>
> as long as you are using Plplot in one thread only, there should be no
> problem. Any problems would come from spawning a thread per plot ...
> I have seen code fragments in some drivers that take care of the
> multithreaded situation, but not in the Windows driver.
>
> It might be interesting to see how that one behaves in such an
> environment.
>
> Regards,
>
> Arjen
>
>
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