Hi,
First, GLPK is great tool and it is
absolutely great that it is free!
I hope this could be helpful. Using cygwin
JNI compiles nicely under windows (xp professional), use the JNI version in the
attached zip file. Basically, just some minor changes to the makefile to
include some stuff. Extract files to your glpk, put yourself in …
glpk-4.3\contrib\jni\c and run “make –f Makefile.cygwin”
Then, move files according to instructions
in http://mail.nongnu.org/archive/html/help-glpk/2004-02/msg00036.html
which also are valid for windows (except that you have a dll instead of a so
file)
(Another issue is that the main glpk43.dll
in the bin directory must be named glpk4.dll, and that the path is set to this
directory)
Also, there is a slip error in the glpk.c
file that is corrected in the included glpk.c file, row 210-213 is:
JNIEXPORT void JNICALL
Java_org_gnu_glpk_GlpkSolver_setObjC0(JNIEnv
*env, jobject obj, jdouble c0) {
lpx_set_obj_dir(get_lpx(env, obj),
(double)c0);
}
Should be:
JNIEXPORT void JNICALL
Java_org_gnu_glpk_GlpkSolver_setObjC0(JNIEnv
*env, jobject obj, jdouble c0) {
lpx_set_obj_c0(get_lpx(env, obj),
(double)c0);
}
Also, running xp I sometimes get an error (crash)
from glplib2.c rows 438-462.
In the printout of the error it doesn’t really look
like it is a memory address that is to be deallocated, but I haven’t really
looked into it.
void ufree(void *ptr)
{ LIBENV *env = lib_env_ptr();
LIBMEM *desc;
int size_of_desc =
align_datasize(sizeof(LIBMEM));
if (ptr == NULL)
fault("ufree: ptr = %p; null
pointer", ptr);
desc = (void *)((char *)ptr - size_of_desc);
if (desc->flag != LIB_MEM_FLAG)
fault("ufree: ptr = %p;
invalid pointer", ptr);
if
(env->mem_total < desc->size || env->mem_count == 0)
fault("ufree:
ptr = %p; memory allocation error", ptr);
if (desc->prev == NULL)
env->mem_ptr = desc->next;
else
desc->prev->next =
desc->next;
if (desc->next == NULL)
;
else
desc->next->prev =
desc->prev;
env->mem_total -= desc->size;
env->mem_count--;
memset(desc, '?', size_of_desc);
free(desc);
return;
}
I handle the error in a very bad way, putting
a return statement after the check “if (env->mem_total <
desc->size || env->mem_count == 0)”:
void ufree(void *ptr)
{ LIBENV *env = lib_env_ptr();
LIBMEM *desc;
int size_of_desc =
align_datasize(sizeof(LIBMEM));
if (ptr == NULL)
fault("ufree: ptr = %p; null
pointer", ptr);
desc = (void *)((char *)ptr -
size_of_desc);
if (desc->flag != LIB_MEM_FLAG)
fault("ufree: ptr = %p;
invalid pointer", ptr);
if
(env->mem_total < desc->size || env->mem_count == 0)
return;
/*fault("ufree: ptr = %p; memory allocation error", ptr);*/
if (desc->prev == NULL)
env->mem_ptr = desc->next;
else
desc->prev->next =
desc->next;
if (desc->next == NULL)
;
else
desc->next->prev =
desc->prev;
env->mem_total -= desc->size;
env->mem_count--;
memset(desc, '?', size_of_desc);
free(desc);
return;
}
Cheers
Fredrik
Från:
address@hidden
[mailto:address@hidden För Chris Rosebrugh
Skickat: den 20 februari 2004
03:45
Till: Welson Sun
Kopia: address@hidden
Ämne: [Help-glpk] RE: JNI for
Windows?
The work I did on JNI only applied to
Linux. Originally, I had it working for Windows as
well but that also required a recompile of
glpk with different switches in order to work.
Over the past few months I' ve gotten
quite a few requests to have this stuff working on
Windows again so I'll do so this weekend
and post a link to this group when it's working.
Caveat emptor though - I only work with
Cygwin on Windows with this stuff - not MS Studio
or Borland, so that's all I'll be able to
speak to.
-----Original Message-----
From: Welson Sun
[mailto:address@hidden
Sent: Wednesday, February 18, 2004
11:00 AM
To: address@hidden
Cc: address@hidden
Subject: JNI for Windows?
I am trying to use the JNI interface for GLPK. In the README of the
JNI, it is said that:
"Currently, Windows is not supported in the Makefiles.", so
how can I make the Windows version of JNI?
I am using Cygwin under WindowsXP, and I tried to compile the JNI ( I
tried 4.3 and 4.4 ), but there are a lot of errors, and it is saying that there
are syntax error in $JAVA_HOME/include/jni.h and
$JAVA_HOME/include/win32/jni_md.h
Is this JNI only for Linux?
Best
Regards,
Welson Sun
-------------------------------------
Electrical and Computer Engineering
Brigham Young Unversity
461 CB, Provo, Utah 84602
Office: (801) 422-7206
Email: address@hidden
-------------------------------------
jni.zip