1 files changed, 178 insertions, 0 deletions
diff --git a/libparc/parc/concurrent/parc_AtomicUint64.c b/libparc/parc/concurrent/parc_AtomicUint64.c
new file mode 100755
index 00000000..35d5cf66
--- /dev/null
+++ b/libparc/parc/concurrent/parc_AtomicUint64.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ */
+#include <config.h>
+
+#include <parc/algol/parc_Object.h>
+#include <parc/algol/parc_DisplayIndented.h>
+
+#include <parc/concurrent/parc_AtomicUint64.h>
+
+struct PARCAtomicUint64 {
+    uint64_t value;
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_t mutex;
+#endif
+};
+
+static void
+_parcAtomicUint64_Finalize(PARCAtomicUint64 **instancePtr)
+{
+    assertNotNull(instancePtr, "Parameter must be a non-null pointer to a PARCAtomicUint64 pointer.");
+
+    parcAtomicUint64_OptionalAssertValid((*instancePtr));
+
+    /* cleanup the instance fields here */
+}
+
+parcObject_ImplementAcquire(parcAtomicUint64, PARCAtomicUint64);
+
+parcObject_ImplementRelease(parcAtomicUint64, PARCAtomicUint64);
+
+parcObject_ExtendPARCObject(PARCAtomicUint64, _parcAtomicUint64_Finalize, parcAtomicUint64_Copy, NULL, parcAtomicUint64_Equals, parcAtomicUint64_Compare, parcAtomicUint64_HashCode, NULL);
+
+
+void
+parcAtomicUint64_AssertValid(const PARCAtomicUint64 *instance)
+{
+    assertTrue(parcAtomicUint64_IsValid(instance),
+               "PARCAtomicUint64 is not valid.");
+}
+
+PARCAtomicUint64 *
+parcAtomicUint64_Create(uint64_t value)
+{
+    PARCAtomicUint64 *result = parcObject_CreateAndClearInstance(PARCAtomicUint64);
+
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_init(&result->mutex, NULL);
+    result->value = value;
+#else
+    *result = value;
+#endif
+
+    return result;
+}
+
+int
+parcAtomicUint64_Compare(const PARCAtomicUint64 *instance, const PARCAtomicUint64 *other)
+{
+    int64_t comparison = parcAtomicUint64_GetValue(instance) - parcAtomicUint64_GetValue(other);
+
+    int result = 0;
+    if (comparison < 0) {
+        result = -1;
+    } else if (comparison > 0) {
+        result = 1;
+    }
+
+    return result;
+}
+
+PARCAtomicUint64 *
+parcAtomicUint64_Copy(const PARCAtomicUint64 *original)
+{
+    PARCAtomicUint64 *result = parcAtomicUint64_Create(parcAtomicUint64_GetValue(original));
+
+    return result;
+}
+
+bool
+parcAtomicUint64_Equals(const PARCAtomicUint64 *x, const PARCAtomicUint64 *y)
+{
+    bool result = false;
+
+    result = parcAtomicUint64_GetValue(x) == parcAtomicUint64_GetValue(y);
+
+    return result;
+}
+
+PARCHashCode
+parcAtomicUint64_HashCode(const PARCAtomicUint64 *instance)
+{
+    PARCHashCode result = (PARCHashCode) parcAtomicUint64_GetValue(instance);
+
+    return result;
+}
+
+bool
+parcAtomicUint64_IsValid(const PARCAtomicUint64 *instance)
+{
+    bool result = false;
+
+    if (instance != NULL) {
+        result = true;
+    }
+
+    return result;
+}
+
+uint64_t
+parcAtomicUint64_GetValue(const PARCAtomicUint64 *instance)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    return instance->value;
+#else
+    return *instance;
+#endif
+}
+
+uint64_t
+parcAtomicUint64_AddImpl(PARCAtomicUint64 *value, uint64_t addend)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_lock(&value->mutex);
+    value->value += addend;
+    uint64_t result = value->value;
+    pthread_mutex_unlock(&value->mutex);
+    return result;
+#else
+    return __sync_add_and_fetch(value, addend);
+#endif
+}
+
+uint64_t
+parcAtomicUint64_SubtractImpl(PARCAtomicUint64 *value, uint64_t subtrahend)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_lock(&value->mutex);
+    value->value -= subtrahend;
+    uint64_t result = value->value;
+    pthread_mutex_unlock(&value->mutex);
+    return result;
+#else
+    return __sync_sub_and_fetch(value, subtrahend);
+#endif
+}
+
+bool
+parcAtomicUint64_CompareAndSwapImpl(PARCAtomicUint64 *value, uint64_t predicate, uint64_t newValue)
+{
+    bool result = false;
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_lock(&value->mutex);
+    if (value->value == predicate) {
+        value->value = newValue;
+        result = true;
+    }
+    pthread_mutex_unlock(&value->mutex);
+    return result;
+#else
+    result = __sync_bool_compare_and_swap(value, predicate, newValue);
+#endif
+    return result;
+}