src/gromacs/mdlib/broadcaststructs.h

   1 /*
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  35
  36 /*! \libinternal \file
  37  *
  38  * \brief Convenience wrappers for broadcasting structs.
  39  *
  40  * \author Mark Abraham <mark.j.abraham@gmail.com>
  41  *
  42  * \inlibraryapi
  43  * \ingroup module_mdlib
  44  */
  45 #ifndef GMX_MDLIB_BROADCASTSTRUCTS_H
  46 #define GMX_MDLIB_BROADCASTSTRUCTS_H
  47
  48 #include <vector>
  49
  50 #include "gromacs/gmxlib/network.h"
  51 #include "gromacs/mdtypes/commrec.h"
  52 #include "gromacs/utility/smalloc.h"
  53
  54 //! Convenience wrapper for gmx_bcast of a single value.
  55 template <typename T>
  56 void block_bc(const t_commrec *cr, T &data)
  57 {
  58     gmx_bcast(sizeof(T), static_cast<void *>(&data), cr);
  59 }
  60 //! Convenience wrapper for gmx_bcast of a C-style array.
  61 template <typename T>
  62 void nblock_bc(const t_commrec *cr, int numElements, T *data)
  63 {
  64     gmx_bcast(numElements * sizeof(T), static_cast<void *>(data), cr);
  65 }
  66 //! Convenience wrapper for allocation with snew of vectors that need allocation on non-master ranks.
  67 template <typename T>
  68 void snew_bc(const t_commrec *cr, T * &data, int numElements)
  69 {
  70     if (!MASTER(cr))
  71     {
  72         snew(data, numElements);
  73     }
  74 }
  75 //! Convenience wrapper for gmx_bcast of a C-style array which needs allocation on non-master ranks.
  76 template <typename T>
  77 static void nblock_abc(const t_commrec *cr, int numElements, T **v)
  78 {
  79     snew_bc(cr, v, numElements);
  80     nblock_bc(cr, numElements, *v);
  81 }
  82 //! Convenience wrapper for gmx_bcast of a std::vector which needs resizing on non-master ranks.
  83 template <typename T>
  84 static void nblock_abc(const t_commrec *cr, int numElements, std::vector<T> *v)
  85 {
  86     if (!MASTER(cr))
  87     {
  88         v->resize(numElements);
  89     }
  90     gmx_bcast(numElements*sizeof(T), v->data(), cr);
  91 }
  92
  93 #endif