Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/Assertions.h"
#include "mozilla/Atomics.h"
#include <stdint.h>
using mozilla::Atomic;
using mozilla::MemoryOrdering;
using mozilla::Relaxed;
using mozilla::ReleaseAcquire;
using mozilla::SequentiallyConsistent;
#define A(a, b) MOZ_RELEASE_ASSERT(a, b)
template <typename T, MemoryOrdering Order>
static void TestTypeWithOrdering() {
Atomic<T, Order> atomic(5);
A(atomic == 5, "Atomic variable did not initialize");
// Test atomic increment
A(++atomic == T(6), "Atomic increment did not work");
A(atomic++ == T(6), "Atomic post-increment did not work");
A(atomic == T(7), "Atomic post-increment did not work");
// Test atomic decrement
A(--atomic == 6, "Atomic decrement did not work");
A(atomic-- == 6, "Atomic post-decrement did not work");
A(atomic == 5, "Atomic post-decrement did not work");
// Test other arithmetic.
T result;
result = (atomic += T(5));
A(atomic == T(10), "Atomic += did not work");
A(result == T(10), "Atomic += returned the wrong value");
result = (atomic -= T(3));
A(atomic == T(7), "Atomic -= did not work");
A(result == T(7), "Atomic -= returned the wrong value");
// Test assignment
result = (atomic = T(5));
A(atomic == T(5), "Atomic assignment failed");
A(result == T(5), "Atomic assignment returned the wrong value");
// Test logical operations.
result = (atomic ^= T(2));
A(atomic == T(7), "Atomic ^= did not work");
A(result == T(7), "Atomic ^= returned the wrong value");
result = (atomic ^= T(4));
A(atomic == T(3), "Atomic ^= did not work");
A(result == T(3), "Atomic ^= returned the wrong value");
result = (atomic |= T(8));
A(atomic == T(11), "Atomic |= did not work");
A(result == T(11), "Atomic |= returned the wrong value");
result = (atomic |= T(8));
A(atomic == T(11), "Atomic |= did not work");
A(result == T(11), "Atomic |= returned the wrong value");
result = (atomic &= T(12));
A(atomic == T(8), "Atomic &= did not work");
A(result == T(8), "Atomic &= returned the wrong value");
// Test exchange.
atomic = T(30);
result = atomic.exchange(42);
A(atomic == T(42), "Atomic exchange did not work");
A(result == T(30), "Atomic exchange returned the wrong value");
// Test CAS.
atomic = T(1);
bool boolResult = atomic.compareExchange(0, 2);
A(!boolResult, "CAS should have returned false.");
A(atomic == T(1), "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(1, 42);
A(boolResult, "CAS should have succeeded.");
A(atomic == T(42), "CAS should have changed atomic's value.");
}
template <typename T, MemoryOrdering Order>
static void TestPointerWithOrdering() {
T array1[10];
Atomic<T*, Order> atomic(array1);
A(atomic == array1, "Atomic variable did not initialize");
// Test atomic increment
A(++atomic == array1 + 1, "Atomic increment did not work");
A(atomic++ == array1 + 1, "Atomic post-increment did not work");
A(atomic == array1 + 2, "Atomic post-increment did not work");
// Test atomic decrement
A(--atomic == array1 + 1, "Atomic decrement did not work");
A(atomic-- == array1 + 1, "Atomic post-decrement did not work");
A(atomic == array1, "Atomic post-decrement did not work");
// Test other arithmetic operations
T* result;
result = (atomic += 2);
A(atomic == array1 + 2, "Atomic += did not work");
A(result == array1 + 2, "Atomic += returned the wrong value");
result = (atomic -= 1);
A(atomic == array1 + 1, "Atomic -= did not work");
A(result == array1 + 1, "Atomic -= returned the wrong value");
// Test stores
result = (atomic = array1);
A(atomic == array1, "Atomic assignment did not work");
A(result == array1, "Atomic assignment returned the wrong value");
// Test exchange
atomic = array1 + 2;
result = atomic.exchange(array1);
A(atomic == array1, "Atomic exchange did not work");
A(result == array1 + 2, "Atomic exchange returned the wrong value");
atomic = array1;
bool boolResult = atomic.compareExchange(array1 + 1, array1 + 2);
A(!boolResult, "CAS should have returned false.");
A(atomic == array1, "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(array1, array1 + 3);
A(boolResult, "CAS should have succeeded.");
A(atomic == array1 + 3, "CAS should have changed atomic's value.");
}
enum EnumType {
EnumType_0 = 0,
EnumType_1 = 1,
EnumType_2 = 2,
EnumType_3 = 3
};
template <MemoryOrdering Order>
static void TestEnumWithOrdering() {
Atomic<EnumType, Order> atomic(EnumType_2);
A(atomic == EnumType_2, "Atomic variable did not initialize");
// Test assignment
EnumType result;
result = (atomic = EnumType_3);
A(atomic == EnumType_3, "Atomic assignment failed");
A(result == EnumType_3, "Atomic assignment returned the wrong value");
// Test exchange.
atomic = EnumType_1;
result = atomic.exchange(EnumType_2);
A(atomic == EnumType_2, "Atomic exchange did not work");
A(result == EnumType_1, "Atomic exchange returned the wrong value");
// Test CAS.
atomic = EnumType_1;
bool boolResult = atomic.compareExchange(EnumType_0, EnumType_2);
A(!boolResult, "CAS should have returned false.");
A(atomic == EnumType_1, "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(EnumType_1, EnumType_3);
A(boolResult, "CAS should have succeeded.");
A(atomic == EnumType_3, "CAS should have changed atomic's value.");
}
enum class EnumClass : uint32_t {
Value0 = 0,
Value1 = 1,
Value2 = 2,
Value3 = 3
};
template <MemoryOrdering Order>
static void TestEnumClassWithOrdering() {
Atomic<EnumClass, Order> atomic(EnumClass::Value2);
A(atomic == EnumClass::Value2, "Atomic variable did not initialize");
// Test assignment
EnumClass result;
result = (atomic = EnumClass::Value3);
A(atomic == EnumClass::Value3, "Atomic assignment failed");
A(result == EnumClass::Value3, "Atomic assignment returned the wrong value");
// Test exchange.
atomic = EnumClass::Value1;
result = atomic.exchange(EnumClass::Value2);
A(atomic == EnumClass::Value2, "Atomic exchange did not work");
A(result == EnumClass::Value1, "Atomic exchange returned the wrong value");
// Test CAS.
atomic = EnumClass::Value1;
bool boolResult =
atomic.compareExchange(EnumClass::Value0, EnumClass::Value2);
A(!boolResult, "CAS should have returned false.");
A(atomic == EnumClass::Value1, "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(EnumClass::Value1, EnumClass::Value3);
A(boolResult, "CAS should have succeeded.");
A(atomic == EnumClass::Value3, "CAS should have changed atomic's value.");
}
template <MemoryOrdering Order>
static void TestBoolWithOrdering() {
Atomic<bool, Order> atomic(false);
A(atomic == false, "Atomic variable did not initialize");
// Test assignment
bool result;
result = (atomic = true);
A(atomic == true, "Atomic assignment failed");
A(result == true, "Atomic assignment returned the wrong value");
// Test exchange.
atomic = false;
result = atomic.exchange(true);
A(atomic == true, "Atomic exchange did not work");
A(result == false, "Atomic exchange returned the wrong value");
// Test CAS.
atomic = false;
bool boolResult = atomic.compareExchange(true, false);
A(!boolResult, "CAS should have returned false.");
A(atomic == false, "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(false, true);
A(boolResult, "CAS should have succeeded.");
A(atomic == true, "CAS should have changed atomic's value.");
}
template <typename T>
static void TestType() {
TestTypeWithOrdering<T, SequentiallyConsistent>();
TestTypeWithOrdering<T, ReleaseAcquire>();
TestTypeWithOrdering<T, Relaxed>();
}
template <typename T>
static void TestPointer() {
TestPointerWithOrdering<T, SequentiallyConsistent>();
TestPointerWithOrdering<T, ReleaseAcquire>();
TestPointerWithOrdering<T, Relaxed>();
}
static void TestEnum() {
TestEnumWithOrdering<SequentiallyConsistent>();
TestEnumWithOrdering<ReleaseAcquire>();
TestEnumWithOrdering<Relaxed>();
TestEnumClassWithOrdering<SequentiallyConsistent>();
TestEnumClassWithOrdering<ReleaseAcquire>();
TestEnumClassWithOrdering<Relaxed>();
}
static void TestBool() {
TestBoolWithOrdering<SequentiallyConsistent>();
TestBoolWithOrdering<ReleaseAcquire>();
TestBoolWithOrdering<Relaxed>();
}
#undef A
int main() {
TestType<uint32_t>();
TestType<int32_t>();
TestType<uint64_t>();
TestType<int64_t>();
TestType<intptr_t>();
TestType<uintptr_t>();
TestPointer<int>();
TestPointer<float>();
TestPointer<uint16_t*>();
TestPointer<uint32_t*>();
TestEnum();
TestBool();
return 0;
}