1 files changed, 178 insertions, 0 deletions
diff --git a/libparc/parc/concurrent/parc_AtomicUint32.c b/libparc/parc/concurrent/parc_AtomicUint32.c
new file mode 100755
index 00000000..32ed7a6a
--- /dev/null
+++ b/libparc/parc/concurrent/parc_AtomicUint32.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_AtomicUint32.h>
+
+struct PARCAtomicUint32 {
+    uint32_t value;
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_t mutex;
+#endif
+};
+
+static void
+_parcAtomicUint32_Finalize(PARCAtomicUint32 **instancePtr)
+{
+    assertNotNull(instancePtr, "Parameter must be a non-null pointer to a PARCAtomicUint32 pointer.");
+
+    parcAtomicUint32_OptionalAssertValid((*instancePtr));
+
+    /* cleanup the instance fields here */
+}
+
+parcObject_ImplementAcquire(parcAtomicUint32, PARCAtomicUint32);
+
+parcObject_ImplementRelease(parcAtomicUint32, PARCAtomicUint32);
+
+parcObject_ExtendPARCObject(PARCAtomicUint32, _parcAtomicUint32_Finalize, parcAtomicUint32_Copy, NULL, parcAtomicUint32_Equals, parcAtomicUint32_Compare, parcAtomicUint32_HashCode, NULL);
+
+
+void
+parcAtomicUint32_AssertValid(const PARCAtomicUint32 *instance)
+{
+    assertTrue(parcAtomicUint32_IsValid(instance),
+               "PARCAtomicUint32 is not valid.");
+}
+
+PARCAtomicUint32 *
+parcAtomicUint32_Create(uint32_t value)
+{
+    PARCAtomicUint32 *result = parcObject_CreateAndClearInstance(PARCAtomicUint32);
+
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_init(&result->mutex, NULL);
+    result->value = value;
+#else
+    *result = value;
+#endif
+
+    return result;
+}
+
+int
+parcAtomicUint32_Compare(const PARCAtomicUint32 *instance, const PARCAtomicUint32 *other)
+{
+    int32_t comparison = parcAtomicUint32_GetValue(instance) - parcAtomicUint32_GetValue(other);
+
+    int result = 0;
+    if (comparison < 0) {
+        result = -1;
+    } else if (comparison > 0) {
+        result = 1;
+    }
+
+    return result;
+}
+
+PARCAtomicUint32 *
+parcAtomicUint32_Copy(const PARCAtomicUint32 *original)
+{
+    PARCAtomicUint32 *result = parcAtomicUint32_Create(parcAtomicUint32_GetValue(original));
+
+    return result;
+}
+
+bool
+parcAtomicUint32_Equals(const PARCAtomicUint32 *x, const PARCAtomicUint32 *y)
+{
+    bool result = false;
+
+    result = parcAtomicUint32_GetValue(x) == parcAtomicUint32_GetValue(y);
+
+    return result;
+}
+
+PARCHashCode
+parcAtomicUint32_HashCode(const PARCAtomicUint32 *instance)
+{
+    PARCHashCode result = (PARCHashCode) parcAtomicUint32_GetValue(instance);
+
+    return result;
+}
+
+bool
+parcAtomicUint32_IsValid(const PARCAtomicUint32 *instance)
+{
+    bool result = false;
+
+    if (instance != NULL) {
+        result = true;
+    }
+
+    return result;
+}
+
+uint32_t
+parcAtomicUint32_GetValue(const PARCAtomicUint32 *instance)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    return instance->value;
+#else
+    return *instance;
+#endif
+}
+
+uint32_t
+parcAtomicUint32_AddImpl(PARCAtomicUint32 *value, uint32_t addend)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_lock(&value->mutex);
+    value->value += addend;
+    uint32_t result = value->value;
+    pthread_mutex_unlock(&value->mutex);
+    return result;
+#else
+    return __sync_add_and_fetch(value, addend);
+#endif
+}
+
+uint32_t
+parcAtomicUint32_SubtractImpl(PARCAtomicUint32 *value, uint32_t subtrahend)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_lock(&value->mutex);
+    value->value -= subtrahend;
+    uint32_t result = value->value;
+    pthread_mutex_unlock(&value->mutex);
+    return result;
+#else
+    return __sync_sub_and_fetch(value, subtrahend);
+#endif
+}
+
+bool
+parcAtomicUint32_CompareAndSwapImpl(PARCAtomicUint32 *value, uint32_t predicate, uint32_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;
+}