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/*----------------------------------------------------------------------
Test program for edm::TypeID class.
----------------------------------------------------------------------*/
#include <cassert>
#include <catch.hpp>
#include "FWCore/Utilities/interface/CallOnceNoWait.h"
#include "FWCore/Utilities/interface/CallNTimesNoWait.h"
#include <thread>
#include <atomic>
#include <vector>
TEST_CASE("CallXNoWait", "[CallXNoWait]") {
SECTION("onceTest") {
edm::CallOnceNoWait guard;
unsigned int iCount = 0;
guard([&iCount]() { ++iCount; });
REQUIRE(iCount == 1u);
guard([&iCount]() { ++iCount; });
REQUIRE(iCount == 1u);
}
SECTION("nTimesTest") {
edm::CallNTimesNoWait guard{3};
unsigned int iCount = 0;
for (unsigned int i = 0; i < 6; ++i) {
guard([&iCount]() { ++iCount; });
if (i < 3) {
REQUIRE(iCount == i + 1);
} else {
REQUIRE(iCount == 3u);
}
}
}
SECTION("onceThreadedTest") {
edm::CallOnceNoWait guard;
std::atomic<unsigned int> iCount{0};
std::vector<std::thread> threads;
std::atomic<bool> start{false};
for (unsigned int i = 0; i < 4; ++i) {
threads.emplace_back([&guard, &iCount, &start]() {
while (!start) {
}
guard([&iCount]() { ++iCount; });
});
}
REQUIRE(iCount == 0u);
start = true;
for (auto& t : threads) {
t.join();
}
REQUIRE(iCount == 1u);
}
SECTION("nTimesThreadedTest") {
const unsigned short kMaxTimes = 3;
edm::CallNTimesNoWait guard(kMaxTimes);
std::atomic<unsigned int> iCount{0};
std::vector<std::thread> threads;
std::atomic<bool> start{false};
for (unsigned int i = 0; i < 2 * kMaxTimes; ++i) {
threads.emplace_back([&guard, &iCount, &start]() {
while (!start) {
}
guard([&iCount]() { ++iCount; });
});
}
REQUIRE(iCount == 0u);
start = true;
for (auto& t : threads) {
t.join();
}
REQUIRE(iCount == kMaxTimes);
}
}
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