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sort.cpp
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#define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
#include <doctest.h>
#include <taskflow/taskflow.hpp>
// --------------------------------------------------------
// Testcase: BubbleSort
// --------------------------------------------------------
TEST_CASE("BubbleSort" * doctest::timeout(300)) {
for(unsigned w=1; w<=9; w+=2) {
tf::Executor executor(w);
for(int end=10; end <= 1000; end += 200) {
tf::Taskflow taskflow("BubbleSort");
std::vector<int> data(end);
for(auto& d : data) d = ::rand()%100;
auto gold = data;
std::sort(gold.begin(), gold.end());
std::atomic<bool>swapped;
// init task
auto init = taskflow.emplace([&swapped](){ swapped = false; });
auto cond = taskflow.emplace([&swapped](){
if(swapped) {
swapped = false;
return 0;
}
return 1;
});
auto stop = taskflow.emplace([](){});
auto even_phase = taskflow.emplace([&](tf::Subflow& sf){
for(size_t i=0; i<data.size(); i+=2) {
sf.emplace([&, i](){
if(i+1 < data.size() && data[i] > data[i+1]) {
std::swap(data[i], data[i+1]);
swapped = true;
}
});
}
});
auto odd_phase = taskflow.emplace([&](tf::Subflow& sf) {
for(size_t i=1; i<data.size(); i+=2) {
sf.emplace([&, i](){
if(i+1 < data.size() && data[i] > data[i+1]) {
std::swap(data[i], data[i+1]);
swapped = true;
}
});
}
});
init.precede(even_phase).name("init");
even_phase.precede(odd_phase).name("even-swap");
odd_phase.precede(cond).name("odd-swap");
cond.precede(even_phase, stop).name("cond");
executor.run(taskflow).wait();
REQUIRE(gold == data);
}
}
}
// --------------------------------------------------------
// Testcase: SelectionSort
// --------------------------------------------------------
TEST_CASE("SelectionSort" * doctest::timeout(300)) {
std::function<
void(tf::Subflow& sf, std::vector<int>&, int, int, int&)
> spawn;
spawn = [&] (
tf::Subflow& sf,
std::vector<int>& data,
int beg,
int end,
int& min
) mutable {
if(!(beg < end)) {
min = -1;
return;
}
if(end - beg == 1) {
min = beg;
return;
}
int m = (beg + end + 1) / 2;
auto minl = new int(-1);
auto minr = new int(-1);
auto SL = sf.emplace(
[&spawn, &data, beg, m, l=minl] (tf::Subflow& sf) mutable {
spawn(sf, data, beg, m, *l);
}).name(std::string("[")
+ std::to_string(beg)
+ ':'
+ std::to_string(m)
+ ')');
auto SR = sf.emplace(
[&spawn, &data, m, end, r=minr] (tf::Subflow& sf) mutable {
spawn(sf, data, m, end, *r);
}).name(std::string("[")
+ std::to_string(m)
+ ':'
+ std::to_string(end)
+ ')');
auto SM = sf.emplace([&data, &min, minl, minr] () {
if(*minl == -1) {
min = *minr;
}
else if(*minr == -1) {
min = *minl;
return;
}
else {
min = data[*minl] < data[*minr] ? *minl : *minr;
}
delete minl;
delete minr;
}).name(std::string("merge [")
+ std::to_string(beg)
+ ':'
+ std::to_string(end) + ')');
SM.succeed(SL, SR);
};
for(unsigned w=1; w<=9; w+=2) {
tf::Executor executor(w);
for(int end=16; end <= 512; end <<= 1) {
tf::Taskflow taskflow("SelectionSort");
std::vector<int> data(end);
for(auto& d : data) d = ::rand()%100;
auto gold = data;
std::sort(gold.begin(), gold.end());
int beg = 0;
int min = -1;
auto start = taskflow.emplace([](){});
auto argmin = taskflow.emplace(
[&spawn, &data, &beg, end, &min](tf::Subflow& sf) mutable {
spawn(sf, data, beg, end, min);
}).name(std::string("[0")
+ ":"
+ std::to_string(end) + ")");
auto putmin = taskflow.emplace([&](){
std::swap(data[beg], data[min]);
//std::cout << "select " << data[beg] << '\n';
beg++;
if(beg < end) {
min = -1;
return 0;
}
else return 1;
});
start.precede(argmin);
argmin.precede(putmin);
putmin.precede(argmin);
executor.run(taskflow).wait();
REQUIRE(gold == data);
//std::exit(1);
}
}
}
// --------------------------------------------------------
// Testcase: MergeSort
// --------------------------------------------------------
TEST_CASE("MergeSort" * doctest::timeout(300)) {
std::function<void(tf::Subflow& sf, std::vector<int>&, int, int)> spawn;
spawn = [&] (tf::Subflow& sf, std::vector<int>& data, int beg, int end) mutable {
if(!(beg < end) || end - beg == 1) {
return;
}
if(end - beg <= 5) {
std::sort(data.begin() + beg, data.begin() + end);
return;
}
int m = (beg + end + 1) / 2;
auto SL = sf.emplace([&spawn, &data, beg, m] (tf::Subflow& sf) {
spawn(sf, data, beg, m);
}).name(std::string("[")
+ std::to_string(beg)
+ ':'
+ std::to_string(m)
+ ')');
auto SR = sf.emplace([&spawn, &data, m, end] (tf::Subflow& sf) {
spawn(sf, data, m, end);
}).name(std::string("[")
+ std::to_string(m)
+ ':'
+ std::to_string(end)
+ ')');
auto SM = sf.emplace([&data, beg, end, m] () {
std::vector<int> tmpl, tmpr;
for(int i=beg; i<m; ++i) tmpl.push_back(data[i]);
for(int i=m; i<end; ++i) tmpr.push_back(data[i]);
// merge to data
size_t i=0, j=0, k=beg;
while(i<tmpl.size() && j<tmpr.size()) {
data[k++] = (tmpl[i] < tmpr[j] ? tmpl[i++] : tmpr[j++]);
}
// remaining SL
for(; i<tmpl.size(); ++i) data[k++] = tmpl[i];
// remaining SR
for(; j<tmpr.size(); ++j) data[k++] = tmpr[j];
}).name(std::string("merge [")
+ std::to_string(beg)
+ ':'
+ std::to_string(end) + ')');
SM.succeed(SL, SR);
};
for(unsigned w=1; w<=9; w+=2) {
tf::Executor executor(w);
for(int end=10; end <= 100000; end = end * 10) {
tf::Taskflow taskflow("MergeSort");
std::vector<int> data(end);
for(auto& d : data) d = ::rand()%100;
auto gold = data;
taskflow.emplace([&spawn, &data, end](tf::Subflow& sf){
spawn(sf, data, 0, end);
}).name(std::string("[0")
+ ":"
+ std::to_string(end) + ")");
executor.run(taskflow).wait();
std::sort(gold.begin(), gold.end());
REQUIRE(gold == data);
}
}
}
// --------------------------------------------------------
// Testcase: QuickSort
// --------------------------------------------------------
TEST_CASE("QuickSort" * doctest::timeout(300)) {
using itr_t = std::vector<int>::iterator;
std::function<void(tf::Subflow& sf, std::vector<int>&, itr_t, itr_t)> spawn;
spawn = [&] (
tf::Subflow& sf,
std::vector<int>& data,
itr_t beg,
itr_t end
) mutable {
if(!(beg < end) || std::distance(beg, end) == 1) {
return;
}
if(std::distance(beg, end) <= 5) {
std::sort(beg, end);
return;
}
auto pvt = beg + std::distance(beg, end) / 2;
std::iter_swap(pvt, end-1);
pvt = std::partition(beg, end-1, [end] (int item) {
return item < *(end - 1);
});
std::iter_swap(pvt, end-1);
sf.emplace([&spawn, &data, beg, pvt] (tf::Subflow& sf) {
spawn(sf, data, beg, pvt);
}).name(std::string("[")
+ std::to_string(beg-data.begin())
+ ':'
+ std::to_string(pvt-data.begin())
+ ')');
sf.emplace([&spawn, &data, pvt, end] (tf::Subflow& sf) {
spawn(sf, data, pvt+1, end);
}).name(std::string("[")
+ std::to_string(pvt-data.begin())
+ ':'
+ std::to_string(end-data.begin())
+ ')');
};
for(unsigned w=1; w<=9; w+=2) {
tf::Executor executor(w);
for(int end=16; end <= 32768; end <<= 1) {
tf::Taskflow taskflow("QuickSort");
std::vector<int> data(end);
for(auto& d : data) d = ::rand()%100;
auto gold = data;
taskflow.emplace([&spawn, &data](tf::Subflow& sf){
spawn(sf, data, data.begin(), data.end());
}).name(std::string("[0")
+ ":"
+ std::to_string(end) + ")");
executor.run(taskflow).wait();
std::sort(gold.begin(), gold.end());
REQUIRE(gold == data);
}
}
}