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siphonelee 2002-09-26
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static FILE* *fp = stdout;
没见过这么用的
你用CreateFile吧
没见过这么用的
你用CreateFile吧
AreDreaming 2002-09-26
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加入stdout之后却出现了错误：
error C2099: initializer is not a constant
不知道是不是由这引起的？
error C2099: initializer is not a constant
不知道是不是由这引起的？
siphonelee 2002-09-26
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把包含psConvert()函数的DLL加入到工程了
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
你怎么加的？
stdout是标准输出，一般是显示器
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
你怎么加的？
stdout是标准输出，一般是显示器
qxwang 2002-09-26
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CreateFileMapping
MapViewOfFile
OpenFileMapping
UnmapViewOfFile
AreDreaming 2002-09-26
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static FILE *tmpfp = NULL, *fp = stdout;
中的stdout是啥子呀？
中的stdout是啥子呀？
AreDreaming 2002-09-26
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UP
AreDreaming 2002-09-26
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真的很谢谢
不过我还有一个编译错误的问题不能解决，非常着急：
Linking...
psConvDlg.obj : error LNK2001: unresolved external symbol _psConvert
.\Debug/Dfv.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
我是使用VC6.0编译别人VC5.0的程序。
而且我把包含psConvert()函数的DLL加入到工程了。那么这可能由什么原因引起的呢？
不过我还有一个编译错误的问题不能解决，非常着急：
Linking...
psConvDlg.obj : error LNK2001: unresolved external symbol _psConvert
.\Debug/Dfv.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.
我是使用VC6.0编译别人VC5.0的程序。
而且我把包含psConvert()函数的DLL加入到工程了。那么这可能由什么原因引起的呢？
taoni 2002-09-26
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#pragma data_seg ("mydata")
int nValue = 5 ;
#pragma data_seg()
在.def文件中写
SECTIONS
mydata READ WRITE SHARED
目前只知道这个了。
int nValue = 5 ;
#pragma data_seg()
在.def文件中写
SECTIONS
mydata READ WRITE SHARED
目前只知道这个了。
masterz 2002-09-26
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DLL Programming Hints
--------------------------------------------------------------------------------
This contains hints to developing DLL's. I'll continue to add them as time goes on. If you know something that may help people developing DLL's, please email me.
Last updated July 27, 1998
--------------------------------------------------------------------------------
Shared Memory
Thanks to Jim Lyssy for his additions and improvements.
Quite often, the same DLL is loaded in different process spaces. This means special code needs to be written to share data by all instances of the DLL.
When sharing data in a DLL, it is important to know if the data is initialized or uninitialized. Uninitialized data is placed into a bss_seg. By keeping the data initialized, the data_seg pragma may then be used. To simply initialize the data, it can be placed in a structure, then initialize it by a {0}. (see example)
Example:
Create an initialized data structure in a DLL.
#pragma data_seg(".SECNAME")
/* Data declarations go here*/
static struct
{
int A;
int B;
}MySharedData = {0};
#pragma data_seg()
After this, the linker needs to be advised that this section is a shared section. This can be done a couple ways. One way is to place this option right after the #pragma data_seg() call.
//option passed to the linker to share the segment
#pragma comment(linker,"section:/.SECNAME:rws")
Another method is to define the section as sharable in the DEF file. Following is a snippet of a DEF file for a library named LibName with a shared section named .SECNAME.
LIBRARY LibName
SECTIONS
.SECNAME READ WRITE SHARED
If you want to have the data unitialized, use bss_seg(). This isn't often used, because the DLL tends to need a starting point for the data.
Example:
Create an uninitialized shared data structure in a DLL.
#pragma bss_seg("Share")
static struct
{
int A;
int B;
} MySharedData;
#pragma bss_seg()
//options passed to linker to share the segment
#pragma comment(linker, "section:/Share:rws");
--------------------------------------------------------------------------------
This contains hints to developing DLL's. I'll continue to add them as time goes on. If you know something that may help people developing DLL's, please email me.
Last updated July 27, 1998
--------------------------------------------------------------------------------
Shared Memory
Thanks to Jim Lyssy for his additions and improvements.
Quite often, the same DLL is loaded in different process spaces. This means special code needs to be written to share data by all instances of the DLL.
When sharing data in a DLL, it is important to know if the data is initialized or uninitialized. Uninitialized data is placed into a bss_seg. By keeping the data initialized, the data_seg pragma may then be used. To simply initialize the data, it can be placed in a structure, then initialize it by a {0}. (see example)
Example:
Create an initialized data structure in a DLL.
#pragma data_seg(".SECNAME")
/* Data declarations go here*/
static struct
{
int A;
int B;
}MySharedData = {0};
#pragma data_seg()
After this, the linker needs to be advised that this section is a shared section. This can be done a couple ways. One way is to place this option right after the #pragma data_seg() call.
//option passed to the linker to share the segment
#pragma comment(linker,"section:/.SECNAME:rws")
Another method is to define the section as sharable in the DEF file. Following is a snippet of a DEF file for a library named LibName with a shared section named .SECNAME.
LIBRARY LibName
SECTIONS
.SECNAME READ WRITE SHARED
If you want to have the data unitialized, use bss_seg(). This isn't often used, because the DLL tends to need a starting point for the data.
Example:
Create an uninitialized shared data structure in a DLL.
#pragma bss_seg("Share")
static struct
{
int A;
int B;
} MySharedData;
#pragma bss_seg()
//options passed to linker to share the segment
#pragma comment(linker, "section:/Share:rws");
masterz 2002-09-26
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http://www.codeproject.com/dll/data_seg_share.asp
How to share a data segment in a DLL
http://support.microsoft.com/default.aspx?scid=KB;EN-US;q125677&
HOWTO: Share Data Between Different Mappings of a DLL
How to share a data segment in a DLL
http://support.microsoft.com/default.aspx?scid=KB;EN-US;q125677&
HOWTO: Share Data Between Different Mappings of a DLL
