Originally from community.borland.com Original name: Creating a Shared Memory Segment WITH C Builder 4.0 Translated Name: Create a shared memory segment C Builder 4.0 in C Builder is the first C that supports shared memory segments Builder compiler. This article explains how to use this feature in Windows DLL.
To change the data segment and class name, you need to add #pragma option -zr [segment name] and #pragma option -zt [class name] below to add a piece of code to 'Data'. Integer. File: shareddata.cpp # pragma option -zrshseg // Change the default data segment name #pragma option -ztshclass // Change the default data class name
// Initialize our intended data INT DATA = 0;
Note that the paragraph in this document is SHSEGSHCLASS. Linker requires a .def file to create a shared segment. The following is the content of the .def file.
File: shared.deflibrary shareddll
Segments SHSEG CLAS 'SHCLASS' Shared
Below is a DLL source file and header file containing the DLL entry point. Includes a method of setting up and acquires a shared memory segment. File: shareddll.h # idef __dll __ # define dll_export __declspec (dllexport) # Else # define dll_export __declspec (dllimport) #ENDIF
Extern "C" {void DLL_EXPORT SETDATA (INT X); int DLL_EXPORT GETDATA (VOID);
File: shareddll.cpp # include # pragma HDRSTOP
#include "shared.h" Useunit ("SharedData.cpp"); Usedef ("Shared.def"); int WinAPI DLLENTRYPOINT (Hinstance Hinst, Unsigned Long Reason, Void *) {Return 1;} Extern Int Data;
Void DLL_EXPORT SETDATA (INT X) {data = x;} int dll_export getdata (void) {return data;}
