src/gmxlib/thread_mpi/list.c

   1 /*
   2 This source code file is part of thread_mpi.
   3 Written by Sander Pronk, Erik Lindahl, and possibly others.
   4
   5 Copyright (c) 2009, Sander Pronk, Erik Lindahl.
   6 All rights reserved.
   7
   8 Redistribution and use in source and binary forms, with or without
   9 modification, are permitted provided that the following conditions are met:
  10 1) Redistributions of source code must retain the above copyright
  11    notice, this list of conditions and the following disclaimer.
  12 2) Redistributions in binary form must reproduce the above copyright
  13    notice, this list of conditions and the following disclaimer in the
  14    documentation and/or other materials provided with the distribution.
  15 3) Neither the name of the copyright holders nor the
  16    names of its contributors may be used to endorse or promote products
  17    derived from this software without specific prior written permission.
  18
  19 THIS SOFTWARE IS PROVIDED BY US ''AS IS'' AND ANY
  20 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  21 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  22 DISCLAIMED. IN NO EVENT SHALL WE BE LIABLE FOR ANY
  23 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  25 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  26 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29
  30 If you want to redistribute modifications, please consider that
  31 scientific software is very special. Version control is crucial -
  32 bugs must be traceable. We will be happy to consider code for
  33 inclusion in the official distribution, but derived work should not
  34 be called official thread_mpi. Details are found in the README & COPYING
  35 files.
  36 */
  37
  38 #ifdef HAVE_TMPI_CONFIG_H
  39 #include "tmpi_config.h"
  40 #endif
  41
  42 #ifdef HAVE_CONFIG_H
  43 #include "config.h"
  44 #endif
  45
  46
  47 #include "thread_mpi/list.h"
  48
  49
  50 void tMPI_Stack_init(tMPI_Stack *st)
  51 {
  52     tMPI_Atomic_ptr_set(&(st->head), NULL);
  53 }
  54
  55 void tMPI_Stack_destroy(tMPI_Stack *st)
  56 {
  57     tMPI_Atomic_ptr_set(&(st->head), NULL);
  58 }
  59
  60 void tMPI_Stack_push(tMPI_Stack *st, tMPI_Stack_element *el)
  61 {
  62     tMPI_Stack_element *head;
  63     do
  64     {
  65         head=(tMPI_Stack_element*)tMPI_Atomic_ptr_get( &(st->head) );
  66         el->next=head;
  67     }
  68     while (tMPI_Atomic_ptr_cas(&(st->head), head, el)!=(void*)head);
  69 }
  70
  71 tMPI_Stack_element *tMPI_Stack_pop(tMPI_Stack *st)
  72 {
  73     tMPI_Stack_element *head,*next;
  74     do
  75     {
  76         head=(tMPI_Stack_element*)tMPI_Atomic_ptr_get( &(st->head) );
  77         if (head)
  78             next=head->next;
  79         else
  80             next=NULL;
  81     } while (tMPI_Atomic_ptr_cas(&(st->head), head, next)!=(void*)head);
  82
  83     return head;
  84 }
  85
  86 tMPI_Stack_element *tMPI_Stack_detach(tMPI_Stack *st)
  87 {
  88     tMPI_Stack_element *head;
  89     do
  90     {
  91         head=(tMPI_Stack_element*)tMPI_Atomic_ptr_get( &(st->head) );
  92     } while (tMPI_Atomic_ptr_cas(&(st->head), head, NULL)!=(void*)head);
  93
  94     return head;
  95 }
  96
  97
  98
  99
 100
 101 #if 0
 102 void tMPI_Queue_init(tMPI_Queue *q)
 103 {
 104     tMPI_Atomic_ptr_set( &(q->head), NULL);
 105     tMPI_Atomic_ptr_set( &(q->tail), NULL);
 106 }
 107
 108
 109 void tMPI_Queue_destroy(tMPI_Queue *q)
 110 {
 111     tMPI_Atomic_ptr_set( &(q->head), NULL);
 112     tMPI_Atomic_ptr_set( &(q->tail), NULL);
 113 }
 114
 115 void tMPI_Queue_enqueue(tMPI_Queue *q, tMPI_Queue_element *qe)
 116 {
 117     tMPI_Queue_element *head, *next;
 118
 119     do
 120     {
 121     } while (tMPI_Atomic_ptr_cas(&(q->head), head,
 122 }
 123 #endif
 124