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/*
* Copyright (c) 2019 ARM Limited
* All rights reserved
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright 2018 Google, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Gabe Black
* Giacomo Travaglini
*/
#include <gtest/gtest.h>
#include <initializer_list>
#include <iostream>
#include <vector>
#include "base/fiber.hh"
/** This test is checking if the "started" member has its expected
* value before and after the fiber runs. In the test an empty fiber
* is used since we are just interested on the _started member and
* nothing more.
*/
TEST(Fiber, Starting)
{
class StartingFiber : public Fiber
{
public:
StartingFiber(Fiber *link) : Fiber(link) {}
void main() { /** Do nothing */ }
};
StartingFiber fiber(Fiber::primaryFiber());
ASSERT_FALSE(fiber.started());
fiber.run();
ASSERT_TRUE(fiber.started());
}
class SwitchingFiber : public Fiber
{
public:
const char *name;
std::vector<Fiber *> next;
SwitchingFiber(const char *name, std::initializer_list<Fiber *> l);
void checkExpected();
void main();
};
extern SwitchingFiber a;
extern SwitchingFiber b;
extern SwitchingFiber c;
SwitchingFiber a("A", { &b, &a, Fiber::primaryFiber(), &b, &c });
SwitchingFiber b("B", { &a, &c });
SwitchingFiber c("C", { &a, Fiber::primaryFiber(), Fiber::primaryFiber() });
std::vector<SwitchingFiber *>::iterator expectedIt;
std::vector<SwitchingFiber *> expected({
&a, &b, &a, &a, /* main Fiber, */
&a, &b, &c, &a, &c,
/* main Fiber, */ &c, &c
});
SwitchingFiber::SwitchingFiber(
const char *name, std::initializer_list<Fiber *> l) :
name(name), next(l)
{}
void
SwitchingFiber::checkExpected()
{
ASSERT_NE(expectedIt, expected.end());
SwitchingFiber *e = *expectedIt++;
EXPECT_EQ(e, this) << "Expected " << e->name << ", got " << name;
}
void
SwitchingFiber::main()
{
checkExpected();
for (auto &n : next) {
n->run();
checkExpected();
}
}
TEST(Fiber, Switching)
{
expectedIt = expected.begin();
a.run();
EXPECT_EQ(expectedIt - expected.begin(), 4);
a.run();
EXPECT_EQ(expectedIt - expected.begin(), 9);
c.run();
EXPECT_EQ(expectedIt - expected.begin(), 10);
EXPECT_FALSE(a.finished());
EXPECT_FALSE(b.finished());
EXPECT_FALSE(c.finished());
c.run();
EXPECT_EQ(expected.end(), expectedIt) <<
"Didn't exactly use up the expected Fiber sequence";
EXPECT_TRUE(c.finished());
}
int currentIndex = 0;
class LinkedFiber : public Fiber
{
public:
const int index;
LinkedFiber(Fiber *link, int index) : Fiber(link), index(index) {}
void
main()
{
EXPECT_EQ(currentIndex, index);
currentIndex++;
}
};
TEST(Fiber, Linked)
{
currentIndex = 0;
LinkedFiber lf3(Fiber::primaryFiber(), 3);
LinkedFiber lf2(&lf3, 2);
LinkedFiber lf1(&lf2, 1);
LinkedFiber lf0(&lf1, 0);
lf0.run();
EXPECT_EQ(currentIndex, 4);
}
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