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// This file is part of CAF, the C++ Actor Framework. See the file LICENSE in
// the main distribution directory for license terms and copyright or visit
// https://github.com/actor-framework/actor-framework/blob/master/LICENSE.
#define CAF_SUITE intrusive.drr_queue
#include "caf/intrusive/drr_queue.hpp"
#include "core-test.hpp"
#include <memory>
#include "caf/intrusive/singly_linked.hpp"
using namespace caf;
using namespace caf::intrusive;
namespace {
struct inode : singly_linked<inode> {
int value;
inode(int x = 0) : value(x) {
// nop
}
};
std::string to_string(const inode& x) {
return std::to_string(x.value);
}
struct inode_policy {
using mapped_type = inode;
using task_size_type = int;
using deficit_type = int;
using deleter_type = std::default_delete<mapped_type>;
using unique_pointer = std::unique_ptr<mapped_type, deleter_type>;
static inline task_size_type task_size(const mapped_type& x) {
return x.value;
}
};
using queue_type = drr_queue<inode_policy>;
struct fixture {
inode_policy policy;
queue_type queue{policy};
void fill(queue_type&) {
// nop
}
template <class T, class... Ts>
void fill(queue_type& q, T x, Ts... xs) {
q.emplace_back(x);
fill(q, xs...);
}
};
auto make_new_round_result(size_t consumed_items, bool stop_all) {
return new_round_result{consumed_items, stop_all};
}
} // namespace
BEGIN_FIXTURE_SCOPE(fixture)
CAF_TEST(default_constructed) {
CAF_REQUIRE_EQUAL(queue.empty(), true);
CAF_REQUIRE_EQUAL(queue.deficit(), 0);
CAF_REQUIRE_EQUAL(queue.total_task_size(), 0);
CAF_REQUIRE_EQUAL(queue.peek(), nullptr);
CAF_REQUIRE_EQUAL(queue.next(), nullptr);
CAF_REQUIRE_EQUAL(queue.begin(), queue.end());
}
CAF_TEST(inc_deficit) {
// Increasing the deficit does nothing as long as the queue is empty.
queue.inc_deficit(100);
CAF_REQUIRE_EQUAL(queue.deficit(), 0);
// Increasing the deficit must work on non-empty queues.
fill(queue, 1);
queue.inc_deficit(100);
CAF_REQUIRE_EQUAL(queue.deficit(), 100);
// Deficit must drop back down to 0 once the queue becomes empty.
queue.next();
CAF_REQUIRE_EQUAL(queue.deficit(), 0);
}
CAF_TEST(new_round) {
std::string seq;
fill(queue, 1, 2, 3, 4, 5, 6);
auto f = [&](inode& x) {
seq += to_string(x);
return task_result::resume;
};
// Allow f to consume 1, 2, and 3 with a leftover deficit of 1.
auto round_result = queue.new_round(7, f);
CHECK_EQ(round_result, make_new_round_result(3, false));
CHECK_EQ(seq, "123");
CHECK_EQ(queue.deficit(), 1);
// Allow f to consume 4 and 5 with a leftover deficit of 0.
round_result = queue.new_round(8, f);
CHECK_EQ(round_result, make_new_round_result(2, false));
CHECK_EQ(seq, "12345");
CHECK_EQ(queue.deficit(), 0);
// Allow f to consume 6 with a leftover deficit of 0 (queue is empty).
round_result = queue.new_round(1000, f);
CHECK_EQ(round_result, make_new_round_result(1, false));
CHECK_EQ(seq, "123456");
CHECK_EQ(queue.deficit(), 0);
// new_round on an empty queue does nothing.
round_result = queue.new_round(1000, f);
CHECK_EQ(round_result, make_new_round_result(0, false));
CHECK_EQ(seq, "123456");
CHECK_EQ(queue.deficit(), 0);
}
CAF_TEST(next) {
std::string seq;
fill(queue, 1, 2, 3, 4, 5, 6);
auto f = [&](inode& x) {
seq += to_string(x);
return task_result::resume;
};
auto take = [&] {
queue.flush_cache();
queue.inc_deficit(queue.peek()->value);
return queue.next();
};
while (!queue.empty()) {
auto ptr = take();
f(*ptr);
}
CHECK_EQ(seq, "123456");
fill(queue, 5, 4, 3, 2, 1);
while (!queue.empty()) {
auto ptr = take();
f(*ptr);
}
CHECK_EQ(seq, "12345654321");
CHECK_EQ(queue.deficit(), 0);
}
CAF_TEST(peek_all) {
auto queue_to_string = [&] {
std::string str;
auto peek_fun = [&](const inode& x) {
if (!str.empty())
str += ", ";
str += std::to_string(x.value);
};
queue.peek_all(peek_fun);
return str;
};
CHECK_EQ(queue_to_string(), "");
queue.emplace_back(1);
CHECK_EQ(queue_to_string(), "1");
queue.emplace_back(2);
CHECK_EQ(queue_to_string(), "1, 2");
queue.emplace_back(3);
CHECK_EQ(queue_to_string(), "1, 2, 3");
queue.emplace_back(4);
CHECK_EQ(queue_to_string(), "1, 2, 3, 4");
}
CAF_TEST(to_string) {
CHECK_EQ(deep_to_string(queue), "[]");
fill(queue, 1, 2, 3, 4);
CHECK_EQ(deep_to_string(queue), "[1, 2, 3, 4]");
}
END_FIXTURE_SCOPE()
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