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Overview
Comment:Go ahead and permanently remove the backoffice timeout mechanism, as it seems clear we will not have a use for it moving forward.
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SHA3-256:4db384875273f5375b62758f8d5e0bcf8fef15b81208450504044f10304388da
User & Date: drh 2018-08-08 23:59:54
Context
2018-08-09
03:35
Added point about multiple copies of each matching post in web search results to the forum.wiki doc. check-in: 89ab99e3 user: wyoung tags: trunk
2018-08-08
23:59
Go ahead and permanently remove the backoffice timeout mechanism, as it seems clear we will not have a use for it moving forward. check-in: 4db38487 user: drh tags: trunk
20:56
Disable backoffice timeouts. This is a temporary measure to avoid a horrible bug in which a timeout causes the email notification sending process to exit before recording the fact that notifications have already been sent, and thus causing the same notifications to be sent again on the next backoffice cycle, and so forth over and over and over. check-in: 628d63c4 user: drh tags: trunk
Changes
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Changes to src/backoffice.c.

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/*
** Return a process id number for the current process
*/
static sqlite3_uint64 backofficeProcessId(void){
  return (sqlite3_uint64)GETPID();
}

#if 0 /* Disable the backoffice timeout for now */
/*
** Set an alarm to cause the process to exit after "x" seconds.  This
** prevents any kind of bug from keeping a backoffice process running
** indefinitely.
*/
static void backofficeSigalrmHandler(int x){
  fossil_panic("backoffice timeout (%d seconds)", x);
}
#if defined(_WIN32)
static void *threadHandle = NULL;
static void __stdcall backofficeWin32NoopApcProc(ULONG_PTR pArg){} /* NO-OP */
static void backofficeWin32ThreadCleanup(int bStrict){
  if( threadHandle!=NULL ){
    /* Queue no-op asynchronous procedure call to the sleeping
     * thread.  This will cause it to wake up with a non-zero
     * return value. */
    if( QueueUserAPC(backofficeWin32NoopApcProc, threadHandle, 0) ){
      /* Wait for the thread to wake up and then exit. */
      WaitForSingleObject(threadHandle, INFINITE);
    }else if(bStrict){
      DWORD dwLastError = GetLastError();
      fossil_errorlog(
        "backofficeWin32ThreadCleanup: QueueUserAPC failed, code %lu",
        dwLastError
      );
      if( !TerminateThread(threadHandle, dwLastError) ){
        dwLastError = GetLastError();
        fossil_panic(
          "backofficeWin32ThreadCleanup: TerminateThread failed, code %lu",
          dwLastError
        );
      }
    }
    CloseHandle(threadHandle);
    threadHandle = NULL;
  }else if(bStrict){
    fossil_panic(
      "backofficeWin32ThreadCleanup: no timeout thread handle"
    );
  }
}
static unsigned __stdcall backofficeWin32SigalrmThreadProc(
  void *pArg /* IN: Pointer to integer number of whole seconds. */
){
  int seconds = FOSSIL_PTR_TO_INT(pArg);
  if( SleepEx((DWORD)seconds * 1000, TRUE)==0 ){
    backofficeSigalrmHandler(seconds);
  }
  _endthreadex(0);
  return 0; /* NOT REACHED */
}
#endif
static void backofficeTimeout(int x){
#if defined(_WIN32)
  backofficeWin32ThreadCleanup(0);
  threadHandle = (void*)_beginthreadex(
    0, 0, backofficeWin32SigalrmThreadProc, FOSSIL_INT_TO_PTR(x), 0, 0
  );
#else
  signal(SIGALRM, backofficeSigalrmHandler);
  alarm(x);
#endif
}
#else  /* Real timeout (above) is disabled.  In its place is the following */
       /* stub routine */
static void backofficeTimeout(int x){ /* no-op */ }
#endif

/*
** COMMAND: test-process-id
**
** Usage: %fossil [--sleep N] PROCESS-ID ...
**
** Show the current process id, and also tell whether or not all other
................................................................................
  sqlite3_uint64 tmNow;
  sqlite3_uint64 idSelf;
  int lastWarning = 0;
  int warningDelay = 30;
  static int once = 0;

  backoffice_error_check_one(&once);
  backofficeTimeout(BKOFCE_LEASE_TIME*2);
  idSelf = backofficeProcessId();
  while(1){
    tmNow = time(0);
    db_begin_write();
    backofficeReadLease(&x);
    if( x.tmNext>=tmNow
     && x.idNext!=idSelf







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/*
** Return a process id number for the current process
*/
static sqlite3_uint64 backofficeProcessId(void){
  return (sqlite3_uint64)GETPID();
}






































































/*
** COMMAND: test-process-id
**
** Usage: %fossil [--sleep N] PROCESS-ID ...
**
** Show the current process id, and also tell whether or not all other
................................................................................
  sqlite3_uint64 tmNow;
  sqlite3_uint64 idSelf;
  int lastWarning = 0;
  int warningDelay = 30;
  static int once = 0;

  backoffice_error_check_one(&once);

  idSelf = backofficeProcessId();
  while(1){
    tmNow = time(0);
    db_begin_write();
    backofficeReadLease(&x);
    if( x.tmNext>=tmNow
     && x.idNext!=idSelf