On Wed, 24 Oct 2012 06:11:13 +0800, "D.Y Feng" <yyfeng88...@gmail.com>
wrote:
> I meet a problem in my code:
>
> hello.h:
>
> #include<QtCore>
>>
>> class Hello : public QObject{
>> Q_OBJECT
>> public:
>> Hello(QObject *parent = 0);
>> static int test(){
>> static int i=0;
>> qDebug()<<i++;
>> return 0;
>> }
>> };
>>
>
> hello.cpp:
>
>> #include "hello.h"
>>
>> const int i=Hello::test();
>>
>> Hello::Hello (QObject *parent)
>> {
>> }
>>
>
> hello.sip
>
> %Module hello
>>
>> %Import QtCore/QtCoremod.sip
>>
>>
>> class Hello : public QObject {
>>
>> %TypeHeaderCode
>> #include "hello.h"
>> %End
>>
>> public:
>> Hello(QObject *parent = 0);
>> static int test();
>> };
>>
>
> I use the* const int i=Hello::test();* to invoke test() before
> *main*function.It's uesful in factory
> pattern when you want to auto register driver.
>
> the python test code
>
>> import hello
>> hello.Hello.test1()
>>
>
> It seems *static int i* in *test() *changed after *import hello*
>
> Breakpoint 1, Hello::test1 () at hello.h:8
>> 8 static int test1(){
>> (gdb) p i
>> $1 = 0
>> (gdb) p &i
>> $2 = (const int *) 0x7ffff60300d0
>> (gdb) c
>> Continuing.
>> 0
>>
>> Breakpoint 1, Hello::test1 () at main.h:8
>> 8 static int test1(){
>> (gdb) p &i
>> $3 = (const int *) 0x7ffff60300d0
>> (gdb) n
>> 10 qDebug()<<i++;
>> (gdb) p &i
>> $4 = (int *) 0x7ffff62355c0 <---What happen here?
>>
>
>
> Thx for reading.
If I have understood correctly you have C++ code that is linked against a
.so and embeds Python which dlopens a sip generated extension module linked
against the same .so. I don't know enough about Linux dynamic loading to
say what happens to static initialisers in those circumstances - but I
don't think it is a sip specific problem.
Phil
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