include/domdec_network.h

   1 /* -*- mode: c; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; c-file-style: "stroustrup"; -*-
   2  *
   3  *
   4  * This file is part of Gromacs        Copyright (c) 1991-2008
   5  * David van der Spoel, Erik Lindahl, Berk Hess, University of Groningen.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * To help us fund GROMACS development, we humbly ask that you cite
  13  * the research papers on the package. Check out http://www.gromacs.org
  14  *
  15  * And Hey:
  16  * Gnomes, ROck Monsters And Chili Sauce
  17  */
  18
  19 #ifndef _domdec_network_h
  20 #define _domdec_network_h
  21 #include "visibility.h"
  22 #include "typedefs.h"
  23 #include "types/commrec.h"
  24
  25 #ifdef __cplusplus
  26 extern "C" {
  27 #endif
  28
  29 enum {
  30     dddirForward,dddirBackward
  31 };
  32
  33 /* Move integers in the comm. region one cell along the domain decomposition
  34  * in the dimension indexed by ddimind
  35  * forward (direction=dddirFoward) or backward (direction=dddirBackward).
  36  */
  37 void
  38 dd_sendrecv_int(const gmx_domdec_t *dd,
  39                 int ddimind,int direction,
  40                 int *buf_s,int n_s,
  41                 int *buf_r,int n_r);
  42
  43 /* Move reals in the comm. region one cell along the domain decomposition
  44  * in the dimension indexed by ddimind
  45  * forward (direction=dddirFoward) or backward (direction=dddirBackward).
  46  */
  47 void
  48 dd_sendrecv_real(const gmx_domdec_t *dd,
  49                  int ddimind,int direction,
  50                  real *buf_s,int n_s,
  51                  real *buf_r,int n_r);
  52
  53 /* Move revc's in the comm. region one cell along the domain decomposition
  54  * in dimension indexed by ddimind
  55  * forward (direction=dddirFoward) or backward (direction=dddirBackward).
  56  */
  57 void
  58 dd_sendrecv_rvec(const gmx_domdec_t *dd,
  59                  int ddimind,int direction,
  60                  rvec *buf_s,int n_s,
  61                  rvec *buf_r,int n_r);
  62
  63
  64 /* Move revc's in the comm. region one cell along the domain decomposition
  65  * in dimension indexed by ddimind
  66  * simultaneously in the forward and backward directions.
  67  */
  68 void
  69 dd_sendrecv2_rvec(const gmx_domdec_t *dd,
  70                   int ddimind,
  71                   rvec *buf_s_fw,int n_s_fw,
  72                   rvec *buf_r_fw,int n_r_fw,
  73                   rvec *buf_s_bw,int n_s_bw,
  74                   rvec *buf_r_bw,int n_r_bw);
  75
  76
  77 /* The functions below perform the same operations as the MPI functions
  78  * with the same name appendices, but over the domain decomposition
  79  * nodes only.
  80  * The DD master node is the master for these operations.
  81  */
  82
  83 GMX_LIBMD_EXPORT
  84 void
  85 dd_bcast(gmx_domdec_t *dd,int nbytes,void *data);
  86
  87 /* Copies src to dest on the master node and then broadcasts */
  88 void
  89 dd_bcastc(gmx_domdec_t *dd,int nbytes,void *src,void *dest);
  90
  91 void
  92 dd_scatter(gmx_domdec_t *dd,int nbytes,void *src,void *dest);
  93
  94 void
  95 dd_gather(gmx_domdec_t *dd,int nbytes,void *src,void *dest);
  96
  97 /* If rcount==0, rbuf is allowed to be NULL */
  98 void
  99 dd_scatterv(gmx_domdec_t *dd,
 100             int *scounts,int *disps,void *sbuf,
 101             int rcount,void *rbuf);
 102
 103 /* If scount==0, sbuf is allowed to be NULL */
 104 void
 105 dd_gatherv(gmx_domdec_t *dd,
 106            int scount,void *sbuf,
 107            int *rcounts,int *disps,void *rbuf);
 108
 109 #ifdef __cplusplus
 110 }
 111 #endif
 112
 113 #endif  /* _domdec_network_h */