Function _db_enter_

dbug/dbug.c:1228–1276

 */

void _db_enter_(const char *_func_, const char *_file_,
                uint _line_, struct _db_stack_frame_ *_stack_frame_)
{
  int save_errno;
  CODE_STATE *cs;
  if (!((cs=code_state())))
  {
    _stack_frame_->level= 0; /* Set to avoid valgrind warnings if dbug is enabled later */
    _stack_frame_->prev= 0;
    return;
  }
  save_errno= errno;

  read_lock_stack(cs);

  _stack_frame_->func= cs->func;
  _stack_frame_->file= cs->file;
  cs->func=  _func_;
  cs->file=  _file_;
  _stack_frame_->prev= cs->framep;
  _stack_frame_->level= ++cs->level | framep_trace_flag(cs, cs->framep);
  cs->framep= _stack_frame_;

  switch (DoTrace(cs)) {
  case ENABLE_TRACE:
    cs->framep->level|= TRACE_ON;
    if (!TRACING) break;
    /* fall through */
  case DO_TRACE:
    if (TRACING)
    {
      if (!cs->locked)
        pthread_mutex_lock(&THR_LOCK_dbug);
      DoPrefix(cs, _line_);
      Indent(cs, cs->level);
      (void) fprintf(cs->stack->out_file, ">%s\n", cs->func);
      DbugFlush(cs);                       /* This does a unlock */
    }
    break;
  case DISABLE_TRACE:
    cs->framep->level&= ~TRACE_ON;
    /* fall through */
  case DONT_TRACE:
    break;
  }
  errno=save_errno;

  unlock_stack(cs);
}

/*
 *  FUNCTION