Re: Singleton class fails on reboot
Thanks for all your replies.
I do think it is a singleton issue.
When I comment out the code above the service starts correctly. The
service is already dependent on the RPC service. I have been through a
microsoft support case to verify this.
But I would like to hear more about the last reply from Axter.
This is my current Instance() function.
if(_theInstance == 0)
_theInstance = new Foo();
How do I change this to incorporate your last advice.
I am writing a windows service. The code runs fine when I start the
service when my machine is running but
it fails to start automatically when the machine reboots. The code
bombs out when it reaches code that tries to access
a singleton class. This is the code.
void ClientLogging::initClientErrorLog(InstallationInfo install)
// next line fails on a reboot
string szLogLevel =
Logging::LogLevel severity =
m_pFileLogAppender = new FileLogAppender(severity, logFile); //this
line fails on reboot
if(false == Logging::Instance().addAppender(m_pFileLogAppender))
The strange thing is ClientLogging is also a singleton, the first one
that is called, and this works fine.
This is called using:
But it is inside this that the problems arise, on the line as seen
string szLogLevel =
The code just terminates.
Is there anything I can do to prevent this, any pragma.
Could this be because I initialize static variables.
Your help would be greatly appreciated.
Your singletons should be created inside a static member function as a
local static variable.
That's the only way to garantee, that your singleton will be created in
a just-in-time order.
If you create your singleton as a global variable or a static member
variable, there's no way to garantee it will be initialized when it's
first used by another global object (like another singleton).
foo& foo::Instance() //Where Instance is declared as a static method
static foo my_foo;
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