I removed my toString() override, and now I get this output. Can you tell whether the memory is allocated properly?

Size of ObjectPointAndOrientationStructure: 296 bytes Size of opo array: 592 ObjectPointAndOrientationStructure(allocated@0x376ae8 (592 bytes) (shared from allocated@0x376ae8 (592 bytes))) { ObjectPointStructure obj_pnt@0=ObjectPointStructure(allocated@0x323c6a8 (24 bytes)) { int obj_pnt_nbr@0=0 int fac_type_sys_nbr@4=0 int fac_enty_nbr@8=0 int rail_loca_nbr@c=0 byte obj_pnt_type_code[5]@10=[B@1a897a9 } int num_rpls@18=0 OrientationStructure ornt[3]@20=[Lcom.uprr.efm.nativ.struct.OrientationStructure;@17cec96 } ObjectPointAndOrientationStructure(allocated@0x376c10 (296 bytes) (shared from allocated@0x376c10 (296 bytes) (shared from allocated@0x376ae8 (592 bytes) (shared from allocated@0x376ae8 (592 bytes))))) { ObjectPointStructure obj_pnt@0=ObjectPointStructure(allocated@0x376c10 (296 bytes) (shared from allocated@0x376c10 (296 bytes) (shared from allocated@0x376c10 (296 bytes) (shared from allocated@0x376ae8 (592 bytes) (shared from allocated@0x376ae8 (592 bytes)))))) { int obj_pnt_nbr@0=0 int fac_type_sys_nbr@4=0 int fac_enty_nbr@8=0 int rail_loca_nbr@c=0 byte obj_pnt_type_code[5]@10=[B@90832e } int num_rpls@18=0 OrientationStructure ornt[3]@20=[Lcom.uprr.efm.nativ.struct.OrientationStructure;@1947496 } # # An unexpected error has been detected by HotSpot Virtual Machine: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x03cdebf1, pid=880, tid=1100 # # Java VM: Java HotSpot(TM) Client VM (1.5.0_04-b05 mixed mode, sharing) # Problematic frame: # C [efms-api.dll+0x2ebf1] # # An error report file with more information is saved as hs_err_pid880.log # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp # Connected to dev091 as dtns999 Entered efm111 PROPO array pointer was NOT null. Building log entry About to write log entry Wrote log entry Building log entry with PROPO data About to write PROPO data to log Wrote PROPO data to log Sizeof(Op_And_Ornt_Struct) = 296 bytes About to initialize SOP output array: 592 bytes starting at 1000E5A4.

_______________________________

Hardware /nm./: the part of the computer you can kick.

RWAD...@UP.COM 07/18/2008 01:08 PM Please respond to use...@jna.dev.java.net

To use...@jna.dev.java.net cc Subject Re: [jna-users] Array of Structures in a Structure

I'm not clear how to tell that the structures are "using the proper shared memory," but here's the output. FYI, I made a small change to the Java structure definition based on your earlier feedback; new code follows the output below.

Size of ObjectPointAndOrientationStructure: 296 bytes Size of opo array: 592 OPOS [OPS [obj_pnt_nbr =0,fac_type_sys_nbr=0,fac_enty_nbr=0,rail_loca_nbr=0],numRpl=0, [Lcom.uprr.efm.nativ.struct.OrientationStructure;@1a897a9] OPOS [OPS [obj_pnt_nbr =0,fac_type_sys_nbr=0,fac_enty_nbr=0,rail_loca_nbr=0],numRpl=0, [Lcom.uprr.efm.nativ.struct.OrientationStructure;@17cec96] # # An unexpected error has been detected by HotSpot Virtual Machine: # # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x03cdebf1, pid=5080, tid=2040 # # Java VM: Java HotSpot(TM) Client VM (1.5.0_04-b05 mixed mode, sharing) # Problematic frame: # C [efms-api.dll+0x2ebf1] # # An error report file with more information is saved as hs_err_pid5080.log # # If you would like to submit a bug report, please visit: # http://java.sun.com/webapps/bugreport/crash.jsp # Connected to dev091 as dtns999 Entered efm111 PROPO array pointer was NOT null. Building log entry About to write log entry Wrote log entry Building log entry with PROPO data About to write PROPO data to log Wrote PROPO data to log Sizeof(Op_And_Ornt_Struct) = 296 bytes About to initialize SOP output array (592 bytes).

Current class definition:

package com.uprr.efm.nativ.struct;

public class ObjectPointAndOrientationStructure extends ApiStructure {

public ObjectPointStructure obj_pnt ; public int num_rpls ; public OrientationStructure[] ornt = new OrientationStructure[3];

@Override public String toString() {

final StringBuilder builder = new StringBuilder("OPOS");

add(builder, null , obj_pnt ); add(builder, "numRpl" , num_rpls ); add(builder, null , ornt );

return end(builder); } }

_______________________________

Hardware /nm./: the part of the computer you can kick.

Timothy Wall <twal...@dev.java.net> 07/18/2008 12:19 PM Please respond to use...@jna.dev.java.net

To use...@jna.dev.java.net cc Subject Re: [jna-users] Array of Structures in a Structure

try Structure.toString and verify that the nested structures are using the proper shared memory; memory gets reallocated after your ctor when you do the "toArray", so you want to ensure that the nested structures' memory gets updated prior to entering your native code.

On Jul 18, 2008, at 12:46 PM, RWAD...@UP.COM wrote:

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