gecko/mfbt/tests/TestAtomics.cpp
Birunthan Mohanathas 63e7a796e9 Bug 888548 - Part 3: Add enum support to mozilla::Atomic<T>. r=froydnj
Due to a bug in GCC, the compareExchange function is not available with enum types.
2013-08-01 21:21:32 -04:00

206 lines
6.8 KiB
C++

/* 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Assertions.h"
#include "mozilla/Atomics.h"
#include "mozilla/DebugOnly.h"
#include <stdint.h>
using mozilla::Atomic;
using mozilla::DebugOnly;
using mozilla::MemoryOrdering;
using mozilla::Relaxed;
using mozilla::ReleaseAcquire;
using mozilla::SequentiallyConsistent;
template <typename T, MemoryOrdering Order>
static void
TestTypeWithOrdering()
{
Atomic<T, Order> atomic(5);
MOZ_ASSERT(atomic == 5, "Atomic variable did not initialize");
// Test atomic increment
MOZ_ASSERT(++atomic == T(6), "Atomic increment did not work");
MOZ_ASSERT(atomic++ == T(6), "Atomic post-increment did not work");
MOZ_ASSERT(atomic == T(7), "Atomic post-increment did not work");
// Test atomic decrement
MOZ_ASSERT(--atomic == 6, "Atomic decrement did not work");
MOZ_ASSERT(atomic-- == 6, "Atomic post-decrement did not work");
MOZ_ASSERT(atomic == 5, "Atomic post-decrement did not work");
// Test other arithmetic.
DebugOnly<T> result;
result = (atomic += T(5));
MOZ_ASSERT(atomic == T(10), "Atomic += did not work");
MOZ_ASSERT(result == T(10), "Atomic += returned the wrong value");
result = (atomic -= T(3));
MOZ_ASSERT(atomic == T(7), "Atomic -= did not work");
MOZ_ASSERT(result == T(7), "Atomic -= returned the wrong value");
// Test assignment
result = (atomic = T(5));
MOZ_ASSERT(atomic == T(5), "Atomic assignment failed");
MOZ_ASSERT(result == T(5), "Atomic assignment returned the wrong value");
// Test logical operations.
result = (atomic ^= T(2));
MOZ_ASSERT(atomic == T(7), "Atomic ^= did not work");
MOZ_ASSERT(result == T(7), "Atomic ^= returned the wrong value");
result = (atomic ^= T(4));
MOZ_ASSERT(atomic == T(3), "Atomic ^= did not work");
MOZ_ASSERT(result == T(3), "Atomic ^= returned the wrong value");
result = (atomic |= T(8));
MOZ_ASSERT(atomic == T(11), "Atomic |= did not work");
MOZ_ASSERT(result == T(11), "Atomic |= returned the wrong value");
result = (atomic |= T(8));
MOZ_ASSERT(atomic == T(11), "Atomic |= did not work");
MOZ_ASSERT(result == T(11), "Atomic |= returned the wrong value");
result = (atomic &= T(12));
MOZ_ASSERT(atomic == T(8), "Atomic &= did not work");
MOZ_ASSERT(result == T(8), "Atomic &= returned the wrong value");
// Test exchange.
atomic = T(30);
result = atomic.exchange(42);
MOZ_ASSERT(atomic == T(42), "Atomic exchange did not work");
MOZ_ASSERT(result == T(30), "Atomic exchange returned the wrong value");
// Test CAS.
atomic = T(1);
DebugOnly<bool> boolResult = atomic.compareExchange(0, 2);
MOZ_ASSERT(!boolResult, "CAS should have returned false.");
MOZ_ASSERT(atomic == T(1), "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(1, 42);
MOZ_ASSERT(boolResult, "CAS should have succeeded.");
MOZ_ASSERT(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);
MOZ_ASSERT(atomic == array1, "Atomic variable did not initialize");
// Test atomic increment
MOZ_ASSERT(++atomic == array1 + 1, "Atomic increment did not work");
MOZ_ASSERT(atomic++ == array1 + 1, "Atomic post-increment did not work");
MOZ_ASSERT(atomic == array1 + 2, "Atomic post-increment did not work");
// Test atomic decrement
MOZ_ASSERT(--atomic == array1 + 1, "Atomic decrement did not work");
MOZ_ASSERT(atomic-- == array1 + 1, "Atomic post-decrement did not work");
MOZ_ASSERT(atomic == array1, "Atomic post-decrement did not work");
// Test other arithmetic operations
DebugOnly<T*> result;
result = (atomic += 2);
MOZ_ASSERT(atomic == array1 + 2, "Atomic += did not work");
MOZ_ASSERT(result == array1 + 2, "Atomic += returned the wrong value");
result = (atomic -= 1);
MOZ_ASSERT(atomic == array1 + 1, "Atomic -= did not work");
MOZ_ASSERT(result == array1 + 1, "Atomic -= returned the wrong value");
// Test stores
result = (atomic = array1);
MOZ_ASSERT(atomic == array1, "Atomic assignment did not work");
MOZ_ASSERT(result == array1, "Atomic assignment returned the wrong value");
// Test exchange
atomic = array1 + 2;
result = atomic.exchange(array1);
MOZ_ASSERT(atomic == array1, "Atomic exchange did not work");
MOZ_ASSERT(result == array1 + 2, "Atomic exchange returned the wrong value");
atomic = array1;
DebugOnly<bool> boolResult = atomic.compareExchange(array1 + 1, array1 + 2);
MOZ_ASSERT(!boolResult, "CAS should have returned false.");
MOZ_ASSERT(atomic == array1, "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(array1, array1 + 3);
MOZ_ASSERT(boolResult, "CAS should have succeeded.");
MOZ_ASSERT(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);
MOZ_ASSERT(atomic == EnumType_2, "Atomic variable did not initialize");
// Test assignment
DebugOnly<EnumType> result;
result = (atomic = EnumType_3);
MOZ_ASSERT(atomic == EnumType_3, "Atomic assignment failed");
MOZ_ASSERT(result == EnumType_3, "Atomic assignment returned the wrong value");
// Test exchange.
atomic = EnumType_1;
result = atomic.exchange(EnumType_2);
MOZ_ASSERT(atomic == EnumType_2, "Atomic exchange did not work");
MOZ_ASSERT(result == EnumType_1, "Atomic exchange returned the wrong value");
// Test CAS.
atomic = EnumType_1;
DebugOnly<bool> boolResult = atomic.compareExchange(EnumType_0, EnumType_2);
MOZ_ASSERT(!boolResult, "CAS should have returned false.");
MOZ_ASSERT(atomic == EnumType_1, "CAS shouldn't have done anything.");
boolResult = atomic.compareExchange(EnumType_1, EnumType_3);
MOZ_ASSERT(boolResult, "CAS should have succeeded.");
MOZ_ASSERT(atomic == EnumType_3, "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>();
}
int main()
{
TestType<uint32_t>();
TestType<int32_t>();
TestType<intptr_t>();
TestType<uintptr_t>();
TestPointer<int>();
TestPointer<float>();
TestPointer<uint16_t*>();
TestPointer<uint32_t*>();
TestEnum();
}