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array.hh
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Wed, Sep 4, 22:17
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rTAMAAS tamaas
array.hh
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/**
* @file
* @section LICENSE
*
* Copyright (©) 2016-19 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __ARRAY__HH__
#define __ARRAY__HH__
/* -------------------------------------------------------------------------- */
#include "tamaas.hh"
#include <thrust/fill.h>
#include <thrust/copy.h>
#include <memory>
#include <utility>
/* -------------------------------------------------------------------------- */
namespace
tamaas
{
/**
* @brief Generic storage class with wrapping capacities
*/
template
<
typename
T
>
class
Array
final
{
public
:
/// Default
Array
()
=
default
;
/// Empty array of given size
Array
(
UInt
size
)
:
Array
()
{
this
->
resize
(
size
);
}
/// Copy constructor (deep)
Array
(
const
Array
&
v
)
:
Array
()
{
this
->
resize
(
v
.
_size
);
thrust
::
copy
(
v
.
_data
,
v
.
_data
+
v
.
_size
,
this
->
_data
);
}
/// Move constructor (transfers data ownership)
Array
(
Array
&&
v
)
noexcept
:
Array
()
{
_data
=
std
::
exchange
(
v
.
_data
,
nullptr
);
_size
=
std
::
exchange
(
v
.
_size
,
0
);
wrapped
=
std
::
exchange
(
v
.
wrapped
,
false
);
}
/// Wrap array on data
Array
(
T
*
data
,
UInt
size
)
:
Array
()
{
this
->
wrapMemory
(
data
,
size
);
}
/// Destructor
~
Array
()
{
if
(
not
wrapped
)
_alloc
.
deallocate
(
_data
,
_size
);
}
public
:
/// Copy operator
Array
&
operator
=
(
const
Array
&
v
)
{
this
->
wrapped
=
false
;
if
(
v
.
size
()
!=
this
->
size
())
this
->
resize
(
v
.
size
());
thrust
::
copy
(
v
.
_data
,
v
.
_data
+
_size
,
_data
);
return
*
this
;
}
/// Move operator
Array
&
operator
=
(
Array
&&
v
)
noexcept
{
if
(
this
!=
&
v
)
{
if
(
not
wrapped
)
_alloc
.
deallocate
(
_data
,
_size
);
_data
=
std
::
exchange
(
v
.
_data
,
nullptr
);
_size
=
std
::
exchange
(
v
.
_size
,
0
);
wrapped
=
std
::
exchange
(
v
.
wrapped
,
false
);
}
return
*
this
;
}
void
wrap
(
Array
&
other
)
{
this
->
wrapMemory
(
other
.
_data
,
other
.
_size
);
}
void
wrap
(
const
Array
&
other
)
{
this
->
wrapMemory
(
other
.
_data
,
other
.
_size
);
}
/// Wrap a memory pointer
void
wrapMemory
(
T
*
data
,
UInt
size
)
{
this
->
_data
=
data
;
this
->
_size
=
size
;
this
->
wrapped
=
true
;
}
/// Assign a sigle value to the array
void
assign
(
UInt
size
,
const
T
&
value
)
{
this
->
resize
(
size
);
thrust
::
fill
(
_data
,
_data
+
size
,
value
);
}
void
setWrapped
(
bool
w
)
{
wrapped
=
w
;
}
/// Data pointer access (const)
const
T
*
data
()
const
{
return
_data
;
}
/// Data pointer access (non-const)
T
*
data
()
{
return
_data
;
}
/// Data pointer setter
void
setData
(
T
*
new_ptr
)
{
_data
=
new_ptr
;
}
/// Resize array
void
resize
(
UInt
size
)
{
if
(
wrapped
)
TAMAAS_EXCEPTION
(
"cannot resize wrapped array"
);
// Erase array
if
(
size
==
0
)
{
_alloc
.
deallocate
(
_data
,
_size
);
this
->
_data
=
nullptr
;
this
->
_size
=
0
;
return
;
}
// Do nothing
if
(
size
==
this
->
_size
)
return
;
// Allocate new data
_alloc
.
deallocate
(
_data
,
_size
);
this
->
_data
=
_alloc
.
allocate
(
size
);
this
->
_size
=
size
;
}
/// Access operator
inline
T
&
operator
[](
UInt
i
)
{
TAMAAS_ASSERT
(
i
<
_size
,
"memory overflow"
);
return
_data
[
i
];
}
/// Access operator (const)
inline
const
T
&
operator
[](
UInt
i
)
const
{
TAMAAS_ASSERT
(
i
<
_size
,
"memory overflow"
);
return
_data
[
i
];
}
/// Get size of array
inline
UInt
size
()
const
{
return
_size
;
}
private
:
T
*
_data
=
nullptr
;
UInt
_size
=
0
;
bool
wrapped
=
false
;
DEFAULT_ALLOCATOR
(
T
)
_alloc
=
DEFAULT_ALLOCATOR
(
T
)();
};
}
// namespace tamaas
/* -------------------------------------------------------------------------- */
#endif
/* __ARRAY__HH__ */
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