/usr/include/rheolef/msg_from_context_pattern.h is in librheolef-dev 6.5-1+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 | #ifndef RHEO_MSG_FROM_CONTEXT_PATTERN_H
#define RHEO_MSG_FROM_CONTEXT_PATTERN_H
///
/// This file is part of Rheolef.
///
/// Copyright (C) 2000-2009 Pierre Saramito <Pierre.Saramito@imag.fr>
///
/// Rheolef is free software; you can redistribute it and/or modify
/// it under the terms of the GNU General Public License as published by
/// the Free Software Foundation; either version 2 of the License, or
/// (at your option) any later version.
///
/// Rheolef is distributed in the hope that it will be useful,
/// but WITHOUT ANY WARRANTY; without even the implied warranty of
/// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
/// GNU General Public License for more details.
///
/// You should have received a copy of the GNU General Public License
/// along with Rheolef; if not, write to the Free Software
/// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
///
/// =========================================================================
# include "rheolef/msg_util.h"
namespace rheolef {
/*F:
NAME: msg_from_context -- gather (@PACKAGE@ @VERSION@)
DESCRIPTION:
Computes the receive compressed message pattern for gather
and scatter.
ALGORITHM:
msg_from_context_pattern
"input": the ownership distribution and the indexes arrays
| msg_size(0:nproc)
"output": the receive context (from) and an auxilliary array proc2from_proc
| from_proc(0:send_nproc-1), from_ptr(0:send_nproc),
| proc2from_proc(0:nproc-1)
begin
| i := 0
| from_ptr(0) := 0
| for iproc := 0 to nproc-1 do
| if msg_size(iproc) <> 0 then
| from_proc(i) := iproc
| from_ptr(i+1) := from_ptr(i) + msg_size(i)
| proc2from_proc(iproc) := i
| i := i+1
| endif
| endfor
end
NOTE:
At the end of the algorithm, we have i = send_nproc.
COMPLEXITY:
Complexity is O(nproc).
METHODS: @msg_from_context_pattern
AUTHORS:
LMC-IMAG, 38041 Grenoble cedex 9, France
| Pierre.Saramito@imag.fr
DATE: 6 january 1999
END:
*/
//<msg_from_context_pattern:
template <
class InputIterator1,
class OutputIterator1,
class OutputIterator2,
class OutputIterator3>
void
msg_from_context_pattern (
InputIterator1 msg_size, // nproc
InputIterator1 last_msg_size,
OutputIterator1 from_proc, // send_nproc
OutputIterator2 from_ptr, // send_nproc+1
OutputIterator3 proc2from_proc) // nproc
{
typedef typename std::iterator_traits<InputIterator1>::value_type Size;
Size iproc = 0;
Size i = 0;
Size ptr_val = 0;
(*from_ptr++) = ptr_val;
while (msg_size != last_msg_size) {
Size sz = (*msg_size++);
if (sz != 0) {
(*from_proc++) = iproc;
ptr_val += sz;
(*from_ptr++) = ptr_val;
(*proc2from_proc) = i;
i++;
}
proc2from_proc++;
iproc++;
}
}
//>msg_from_context_pattern:
} // namespace rheolef
#endif // RHEO_MSG_FROM_CONTEXT_PATTERN_H
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