Przemyslaw Czerpak wrote: > In theory such situation is possible if OS2 does not keep > thread return results for parent process when thread terminates. > In such case DosWaitThread() will always fail and hb_threadJoin() > will not store thread return value in second parameter. I'll > add workaround for it so for OS2 the results of DosWaitThread() > will be ignored. It should resolve the problem. > If the above is true then it also explains why there is no detaching > in OS2 - just simply there is nothing to detach and thread exist > codes are simply dropped by OS so parent cannot check them. >
this is what doswaitthread() does: Places the current thread into a wait state until another thread in the current process has ended. It then returns the thread identifier of the ending thread. #define INCL_DOSPROCESS #include <os2.h> PTID ptid; /* Address of the thread identification. */ ULONG option; /* An indicator that specifies whether to return if no thread has ended. */ APIRET ulrc; /* Return Code. */ ulrc = DosWaitThread(ptid, option); ptid (PTID) - in/out Address of the thread identification. Input The address of the ThreadID of the thread of interest. If ptid is 0, the current thread waits until the next thread in the process has ended. If ptid is nonzero, the current thread waits until the indicated thread has ended. Output The ThreadID of the ended thread is returned in this field. option (ULONG) - input An indicator that specifies whether to return if no thread has ended. The values of this field are shown in the following list: 0 DCWW_WAIT The current thread waits until a thread ends. If a thread has already ended, the call returns immediately with the ptid. 1 DCWW_NOWAIT The current thread does not wait if no threads have ended. ulrc (APIRET) - returns Return Code. DosWaitThread returns one of the following values: 0 NO_ERROR 95 ERROR_INTERRUPT 294 ERROR_THREAD_NOT_TERMINATED 309 ERROR_INVALID_THREADID For a full list of error codes, see Errors. Remarks: DosWaitThread is used to wait for termination of threads within a process. It is usually used so that thread resources (for example, the stack) can be recovered when a thread ends. DosWaitThread waits on any thread within the current process, or on a specific thread within the process, based on the ptid parameter's contents. option allows the caller the option of waiting until a thread ends, or getting immediate return and status. If no thread has ended and the DCWW_NOWAIT option is specified, the ptid field is preserved. If DosWaitThread is called with the input ptid set to the current thread (the thread attempts to wait on its own termination), the ERROR_INVALID_THREADID error code is returned. ERROR_INVALID_THREADID is also returned if a caller attempts to wait on the termination of the thread with a ptid of 1. I hope this helps and thanks for your continued OS/2 support! Best regards. Maurilio. -- __________ | | | |__| Maurilio Longo |_|_|_|____| farmaconsult s.r.l. _______________________________________________ Harbour mailing list Harbour@harbour-project.org http://lists.harbour-project.org/mailman/listinfo/harbour
