Files
pip/tests/thread/piprotectedvariable_test.cpp

117 lines
2.9 KiB
C++

#include "piprotectedvariable.h"
#include "pistring.h"
#include "pithread.h"
#include "piliterals_time.h"
#include "gtest/gtest.h"
#include <atomic>
// Basic functionality tests
TEST(PIProtectedVariable_Basic, BasicFunctionality) {
// Test basic set/get with different types
PIProtectedVariable<int> pvInt;
PIProtectedVariable<double> pvDouble;
PIProtectedVariable<PIString> pvString;
pvInt.set(123);
pvDouble.set(3.14159);
pvString.set(PIString("Hello, World!"));
EXPECT_EQ(pvInt.get(), 123);
EXPECT_DOUBLE_EQ(pvDouble.get(), 3.14159);
EXPECT_EQ(pvString.get(), PIString("Hello, World!"));
// Test operator=
pvInt = 999;
EXPECT_EQ(pvInt.get(), 999);
// Test getRef() with Pointer
struct TestStruct {
int x = 10;
int y = 20;
int getValue() const { return x + y; }
};
PIProtectedVariable<TestStruct> pvStruct;
auto ptr = pvStruct.getRef();
EXPECT_EQ(ptr->x, 10);
EXPECT_EQ(ptr->y, 20);
EXPECT_EQ(ptr->getValue(), 30);
// Modify through pointer
*ptr = TestStruct();
ptr->x = 100;
EXPECT_EQ(pvStruct.get().x, 100);
// Test for Pointer
pvInt.set(42);
auto ptr1 = pvInt.getRef();
EXPECT_EQ(*ptr1, 42);
*ptr1 = 55;
EXPECT_EQ(*ptr1, 55);
auto ptr2 = std::move(ptr1);
EXPECT_EQ(*ptr2, 55);
*ptr2 = 100;
EXPECT_EQ(*ptr2, 100);
auto ptr3 = pvInt.getRef();
EXPECT_EQ(*ptr3, 100);
*ptr3 = 333;
EXPECT_EQ(*ptr3, 333);
EXPECT_EQ(pvInt.get(), 333);
}
// Thread safety tests
TEST(PIProtectedVariable_ThreadSafety, ConcurrentReadWrite) {
PIProtectedVariable<int> pv;
std::atomic<int> writeCount(0);
std::atomic<int> readCount(0);
std::atomic<int> invalidReads(0);
const int NUM_ITERATIONS = 1000;
const int NUM_WRITERS = 10;
const int NUM_READERS = 20;
const int TOTAL_WRITES = NUM_WRITERS * NUM_ITERATIONS;
// Collect thread handles for joining
PIVector<PIThread *> threads;
// Create writer threads
for (int i = 0; i < NUM_WRITERS; ++i) {
threads.push_back(new PIThread([&pv, &writeCount]() {
for (int j = 0; j < NUM_ITERATIONS; ++j) {
auto val = pv.getRef();
(*val)++;
writeCount++;
}
}));
}
// Create reader threads
for (int i = 0; i < NUM_READERS; ++i) {
threads.push_back(new PIThread([&pv, &invalidReads, &readCount]() {
for (int j = 0; j < NUM_ITERATIONS; ++j) {
auto val = pv.get();
readCount++;
// Value should always be in valid range [0, TOTAL_WRITES]
if (val < 0 || val > TOTAL_WRITES) {
invalidReads++;
}
}
}));
}
threads.forEach([](PIThread * & t) {t->startOnce();});
threads.forEach([](PIThread * & t) {t->waitForFinish(2_s);});
piDeleteAll(threads);
// Verify results
EXPECT_EQ(writeCount, TOTAL_WRITES);
EXPECT_EQ(readCount, NUM_READERS * NUM_ITERATIONS);
EXPECT_EQ(invalidReads, 0) << "All reads should return valid values in range [0, " << TOTAL_WRITES << "]";
// Final value should be TOTAL_WRITES
int finalVal = pv.get();
EXPECT_EQ(finalVal, TOTAL_WRITES);
}