From ec688b4723a041044226358bcd4dd6e2da39da49 Mon Sep 17 00:00:00 2001
From: Luca Muscariello <lumuscar+fdio@cisco.com>
Date: Thu, 23 Feb 2017 17:01:02 +0100
Subject: Initial commit: cframework. Longbow and Libparc

Change-Id: I90378dbd30da6033b20fb1f829b3b822cf366c59
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>
---
 libparc/parc/concurrent/parc_AtomicUint8.c | 178 +++++++++++++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100755 libparc/parc/concurrent/parc_AtomicUint8.c

(limited to 'libparc/parc/concurrent/parc_AtomicUint8.c')

diff --git a/libparc/parc/concurrent/parc_AtomicUint8.c b/libparc/parc/concurrent/parc_AtomicUint8.c
new file mode 100755
index 00000000..59a3d865
--- /dev/null
+++ b/libparc/parc/concurrent/parc_AtomicUint8.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_AtomicUint8.h>
+
+struct PARCAtomicUint8 {
+    uint8_t value;
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_t mutex;
+#endif
+};
+
+static void
+_parcAtomicUint8_Finalize(PARCAtomicUint8 **instancePtr)
+{
+    assertNotNull(instancePtr, "Parameter must be a non-null pointer to a PARCAtomicUint8 pointer.");
+
+    parcAtomicUint8_OptionalAssertValid((*instancePtr));
+
+    /* cleanup the instance fields here */
+}
+
+parcObject_ImplementAcquire(parcAtomicUint8, PARCAtomicUint8);
+
+parcObject_ImplementRelease(parcAtomicUint8, PARCAtomicUint8);
+
+parcObject_ExtendPARCObject(PARCAtomicUint8, _parcAtomicUint8_Finalize, parcAtomicUint8_Copy, NULL, parcAtomicUint8_Equals, parcAtomicUint8_Compare, parcAtomicUint8_HashCode, NULL);
+
+
+void
+parcAtomicUint8_AssertValid(const PARCAtomicUint8 *instance)
+{
+    assertTrue(parcAtomicUint8_IsValid(instance),
+               "PARCAtomicUint8 is not valid.");
+}
+
+PARCAtomicUint8 *
+parcAtomicUint8_Create(uint8_t value)
+{
+    PARCAtomicUint8 *result = parcObject_CreateAndClearInstance(PARCAtomicUint8);
+
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_init(&result->mutex, NULL);
+    result->value = value;
+#else
+    *result = value;
+#endif
+
+    return result;
+}
+
+int
+parcAtomicUint8_Compare(const PARCAtomicUint8 *instance, const PARCAtomicUint8 *other)
+{
+    int8_t comparison = parcAtomicUint8_GetValue(instance) - parcAtomicUint8_GetValue(other);
+
+    int result = 0;
+    if (comparison < 0) {
+        result = -1;
+    } else if (comparison > 0) {
+        result = 1;
+    }
+
+    return result;
+}
+
+PARCAtomicUint8 *
+parcAtomicUint8_Copy(const PARCAtomicUint8 *original)
+{
+    PARCAtomicUint8 *result = parcAtomicUint8_Create(parcAtomicUint8_GetValue(original));
+
+    return result;
+}
+
+bool
+parcAtomicUint8_Equals(const PARCAtomicUint8 *x, const PARCAtomicUint8 *y)
+{
+    bool result = false;
+
+    result = parcAtomicUint8_GetValue(x) == parcAtomicUint8_GetValue(y);
+
+    return result;
+}
+
+PARCHashCode
+parcAtomicUint8_HashCode(const PARCAtomicUint8 *instance)
+{
+    PARCHashCode result = (uint32_t) parcAtomicUint8_GetValue(instance);
+
+    return result;
+}
+
+bool
+parcAtomicUint8_IsValid(const PARCAtomicUint8 *instance)
+{
+    bool result = false;
+
+    if (instance != NULL) {
+        result = true;
+    }
+
+    return result;
+}
+
+uint8_t
+parcAtomicUint8_GetValue(const PARCAtomicUint8 *instance)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    return instance->value;
+#else
+    return *instance;
+#endif
+}
+
+uint8_t
+parcAtomicUint8_AddImpl(PARCAtomicUint8 *value, uint8_t addend)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_lock(&value->mutex);
+    value->value += addend;
+    uint8_t result = value->value;
+    pthread_mutex_unlock(&value->mutex);
+    return result;
+#else
+    return __sync_add_and_fetch(value, addend);
+#endif
+}
+
+uint8_t
+parcAtomicUint8_SubtractImpl(PARCAtomicUint8 *value, uint8_t subtrahend)
+{
+#ifdef PARCLibrary_DISABLE_ATOMICS
+    pthread_mutex_lock(&value->mutex);
+    value->value -= subtrahend;
+    uint8_t result = value->value;
+    pthread_mutex_unlock(&value->mutex);
+    return result;
+#else
+    return __sync_sub_and_fetch(value, subtrahend);
+#endif
+}
+
+bool
+parcAtomicUint8_CompareAndSwapImpl(PARCAtomicUint8 *value, uint8_t predicate, uint8_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;
+}
-- 
cgit 1.2.3-korg