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TurTLE
TurTLE
Commits
c6cc3649
Commit
c6cc3649
authored
4 years ago
by
Berenger Bramas
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Use lock with intel compiler
parent
a98ac586
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Pipeline
#101864
passed
4 years ago
Stage: build
Stage: test
Changes
1
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1
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1 changed file
cpp/particles/lock_free_bool_array.hpp
+30
-8
30 additions, 8 deletions
cpp/particles/lock_free_bool_array.hpp
with
30 additions
and
8 deletions
cpp/particles/lock_free_bool_array.hpp
+
30
−
8
View file @
c6cc3649
...
...
@@ -32,18 +32,30 @@
#include
<cstdio>
#include
<omp.h>
class
lock_free_bool_array
{
static
const
int
Available
=
0
;
static
const
int
Busy
=
1
;
static
const
int
NoOwner
=
-
1
;
#ifdef __INTEL_COMPILER
struct
Locker
{
Locker
(){
omp_init_nest_lock
(
&
lock
);
}
~
Locker
(){
omp_destroy_nest_lock
(
&
lock
);
}
omp_nest_lock_t
lock
;
};
#else
struct
Locker
{
Locker
()
:
lock
(
Available
),
ownerId
(
NoOwner
),
counter
(
0
)
{}
Locker
()
:
lock
(
Available
),
ownerId
(
NoOwner
),
counter
(
0
)
{
}
std
::
atomic_int
lock
;
std
::
atomic_int
ownerId
;
int
counter
;
};
#endif
std
::
vector
<
std
::
unique_ptr
<
Locker
>>
keys
;
...
...
@@ -58,27 +70,36 @@ public:
#ifndef NDEBUG
~
lock_free_bool_array
(){
for
(
auto
&
k
:
keys
){
#ifdef __INTEL_COMPILER
#else
assert
(
k
->
lock
.
load
()
==
Available
);
assert
(
k
->
ownerId
.
load
()
==
NoOwner
);
#endif
}
}
#endif
#ifdef __INTEL_COMPILER
void
lock
(
const
long
int
inKey
){
Locker
*
k
=
keys
[
inKey
%
keys
.
size
()].
get
();
omp_set_nest_lock
(
&
k
->
lock
);
}
void
unlock
(
const
long
int
inKey
){
Locker
*
k
=
keys
[
inKey
%
keys
.
size
()].
get
();
omp_unset_nest_lock
(
&
k
->
lock
);
}
#else
void
lock
(
const
long
int
inKey
){
Locker
*
k
=
keys
[
inKey
%
keys
.
size
()].
get
();
if
(
k
->
ownerId
.
load
()
!=
omp_get_thread_num
()){
int
localBusy
=
Busy
;
// Intel complains if we pass a const as last param
int
expected
=
Available
;
#ifdef __INTEL_COMPILER
while
(
!
__sync_val_compare_and_swap
((
int
*
)
&
k
->
lock
,
expected
,
localBusy
)){
#else
while
(
!
std
::
atomic_compare_exchange_strong
(
&
k
->
lock
,
&
expected
,
localBusy
)){
#endif
usleep
(
1
);
expected
=
Available
;
}
#ifdef __INTEL_COMPILER
assert
(
k
->
ownerId
.
load
()
==
NoOwner
);
#endif
k
->
ownerId
.
store
(
omp_get_thread_num
());
k
->
counter
=
0
;
// must remain
}
...
...
@@ -99,6 +120,7 @@ public:
k
->
lock
.
store
(
Available
);
}
}
#endif
};
#endif
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