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/*
******************************************************
* Copyright (c) 2014, ArrayFire
* All rights reserved.
*
* This file is distributed under 3-clause BSD license.
* The complete license agreement can be obtained at:
* http://arrayfire.com/licenses/BSD-3-Clause
*******************************************************
*/
#
include
<
arrayfire.h
>
#
include
<
gtest/gtest.h
>
#
include
<
testHelpers.hpp
>
#
include
<
af/data.h
>
#
include
<
af/dim4.hpp
>
#
include
<
af/traits.hpp
>
#
include
<
atomic
>
#
include
<
string
>
#
include
<
thread
>
#
include
<
vector
>
#
include
<
af/device.h
>
using
af::dtype_traits;
using
af::getAvailableBackends;
using
af::setBackend;
using
std::string;
using
std::vector;
const
char
*
getActiveBackendString
(af_backend active) {
switch
(active) {
case
AF_BACKEND_CPU
:
return
"
AF_BACKEND_CPU
"
;
case
AF_BACKEND_CUDA
:
return
"
AF_BACKEND_CUDA
"
;
case
AF_BACKEND_OPENCL
:
return
"
AF_BACKEND_OPENCL
"
;
default
:
return
"
AF_BACKEND_DEFAULT
"
;
}
}
void
testFunction
(af_backend expected) {
af_backend activeBackend = (af_backend)
0
;
af_get_active_backend
(&activeBackend);
ASSERT_EQ
(expected, activeBackend);
af_array outArray =
0
;
dim_t
dims[] = {
32
,
32
};
EXPECT_EQ
(
AF_SUCCESS
,
af_randu
(&outArray,
2
, dims,
f32
));
//
Verify backends returned by array and by function are the same
af_backend arrayBackend = (af_backend)
0
;
af_get_backend_id
(&arrayBackend, outArray);
EXPECT_EQ
(arrayBackend, activeBackend);
//
cleanup
if
(outArray !=
0
) {
ASSERT_SUCCESS
(
af_release_array
(outArray)); }
}
void
backendTest
() {
int
backends =
getAvailableBackends
();
ASSERT_NE
(backends,
0
);
bool
cpu = backends &
AF_BACKEND_CPU
;
bool
cuda = backends &
AF_BACKEND_CUDA
;
bool
opencl = backends &
AF_BACKEND_OPENCL
;
if
(cpu) {
setBackend
(
AF_BACKEND_CPU
);
testFunction
(
AF_BACKEND_CPU
);
}
if
(cuda) {
setBackend
(
AF_BACKEND_CUDA
);
testFunction
(
AF_BACKEND_CUDA
);
}
if
(opencl) {
setBackend
(
AF_BACKEND_OPENCL
);
testFunction
(
AF_BACKEND_OPENCL
);
}
}
TEST
(
BACKEND_TEST
, Basic) {
backendTest
(); }
using
af::getActiveBackend;
void
test_backend
(std::atomic<
int
>& counter,
int
ntests,
af::Backend default_backend, af::Backend test_backend) {
auto
ta_backend =
getActiveBackend
();
ASSERT_EQ
(default_backend, ta_backend);
//
Wait until all threads reach this point
counter++;
while
(counter < ntests) {}
setBackend
(test_backend);
//
Wait until all threads reach this point
counter++;
while
(counter <
2
* ntests) {}
ta_backend =
getActiveBackend
();
ASSERT_EQ
(test_backend, ta_backend);
}
TEST
(Backend, Threads) {
using
std::thread;
std::atomic<
int
>
count
(
0
);
setBackend
(
AF_BACKEND_DEFAULT
);
auto
default_backend =
getActiveBackend
();
int
numbk =
af::getBackendCount
();
thread a, b, c;
if
(
af::getAvailableBackends
() &
AF_BACKEND_CPU
) {
a =
thread
([&]() {
test_backend
(count, numbk, default_backend,
AF_BACKEND_CPU
);
});
}
if
(
af::getAvailableBackends
() &
AF_BACKEND_OPENCL
) {
b =
thread
([&]() {
test_backend
(count, numbk, default_backend,
AF_BACKEND_OPENCL
);
});
}
if
(
af::getAvailableBackends
() &
AF_BACKEND_CUDA
) {
c =
thread
([&]() {
test_backend
(count, numbk, default_backend,
AF_BACKEND_CUDA
);
});
}
if
(a.
joinable
()) a.
join
();
if
(b.
joinable
()) b.
join
();
if
(c.
joinable
()) c.
join
();
}
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