How can I schedule tasks based on DLL or EXE using Symbian C++?

From Nokia Developer Wiki
Jump to: navigation, search

Archived.pngArchived: This article is archived because it is not considered relevant for third-party developers creating commercial solutions today. If you think this article is still relevant, let us know by adding the template {{ReviewForRemovalFromArchive|user=~~~~|write your reason here}}.

The article is believed to be still valid for the original topic scope.

Article Metadata
Platform(s): S60 1st Edition
S60 2nd Edition
S60 2nd Edition (initial release)
S60 1st Edition
Created: User:Technical writer 2 (12 Feb 2004)
Last edited: lpvalente (17 Nov 2012)


How can I schedule tasks based on DLL or EXE?


Scheduling DLL or EXE-based tasks using the RScheduler class requires a certain technique to implement the EXE and DLL.


To schedule a DLL-based task in the emulator, implement the DLL as follows:

LOCAL_D TInt StartDLL(TAny* aParam)
CMyDll* self = new(ELeave) CMyDll;
TInt CMyDll::Test()
return KErrNone;
EXPORT_C TThreadFunction ThreadFunction()
// Ordinal one export that returns the function
// which extracts the pseudo-command line
// under WINS, this is passed as thread data).
return StartDLL;
GLDEF_C TInt E32Dll(TDllReason /*aReason*/)

Further information: The aParam passed in StartDLL can be used as follows to create CScheduledTask objects:

TFileName* fileName = reinterpret_cast<TFileName*>(aParam);
CcFileStore* store = CDirectFileStore::OpenLC(iFsSession, fileName, EFileRead);
RStoreReadStream instream;
instream.OpenLC(*store, store->Root());
// Get task count
TInt count = instream.ReadInt32L();
__ASSERT_ALWAYS(count > 0, Panic(ETaskExePanicNoScheduledTasks));
for (TInt i=0;i<count;i++)
CScheduledTask* task =
To schedule an EXE-based task in the device, implement the EXE as follows:
GLDEF_C TInt E32Main()
TBuf<256> cmd;
return Test(cmd);
LOCAL_C TInt Test(TDesC& aTaskDataFile)
// Extract scheduled tasks as shown above.
This page was last modified on 17 November 2012, at 21:31.
10 page views in the last 30 days.

Was this page helpful?

Your feedback about this content is important. Let us know what you think.


Thank you!

We appreciate your feedback.