text: // GB_queue_insert:  TODO in 4.0: delete 
  // DEPRECATED:  all GB_queue_* will be removed when GrB_wait() is gone.
  
  #include "GB.h"
  
  GB_PUBLIC
  bool GB_queue_insert (GrB_Matrix A)
  {
      bool ok = true ;
      if ((A->Pending != NULL || A->nzombies > 0) && !(A->enqueued))
      {
          #define GB_CRITICAL_SECTION                                         \
          {                                                                   \
              if ((A->Pending != NULL || A->nzombies > 0) && !(A->enqueued))  \
              {                                                               \
                  GrB_Matrix Head = (GrB_Matrix) (GB_Global_queue_head_get ( )) ;\
                  A->queue_next = Head ;                                      \
                  A->queue_prev = NULL ;                                      \
                  A->enqueued = true ;                                        \
                  if (Head != NULL)                                           \
                  {                                                           \
                      Head->queue_prev = A ;                                  \
                  }                                                           \
                  GB_Global_queue_head_set (A) ;                              \
              }                                                               \
          }
          #include "GB_critical_section.c"
      }
      return (ok) ;
  }
  
  