Initial commit: cframework. Longbow and Libparc

Change-Id: I90378dbd30da6033b20fb1f829b3b822cf366c59
Signed-off-by: Luca Muscariello <lumuscar+fdio@cisco.com>

1 files changed, 341 insertions, 0 deletions

diff --git a/libparc/parc/concurrent/parc_AtomicUint8.h b/libparc/parc/concurrent/parc_AtomicUint8.h
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+/*
+ * 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.
+ */
+
+/**
+ * @file parc_AtomicUint8.h
+ * @ingroup threading
+ * @brief An atomically updated 8-bit unsigned integer.
+ *
+ * <#Detailed Description#>
+ *
+ */
+#ifndef PARCLibrary_parc_AtomicUint8
+#define PARCLibrary_parc_AtomicUint8
+#include <stdbool.h>
+#include <stdint.h>
+
+#include <parc/algol/parc_JSON.h>
+
+#ifdef PARCLibrary_DISABLE_ATOMICS
+#include <pthread.h>
+struct PARCAtomicUint8;
+typedef struct PARCAtomicUint8 PARCAtomicUint8;
+#else
+typedef uint8_t PARCAtomicUint8;
+#endif
+
+
+PARCAtomicUint8 *parcAtomicInteger_CreateUint8(uint8_t value);
+
+uint8_t parcAtomicUint8_AddImpl(PARCAtomicUint8 *value, uint8_t addend);
+
+uint8_t parcAtomicUint8_SubtractImpl(PARCAtomicUint8 *value, uint8_t subtrahend);
+
+bool parcAtomicUint8_CompareAndSwapImpl(PARCAtomicUint8 *value, uint8_t predicate, uint8_t newValue);
+
+#ifdef PARCLibrary_DISABLE_ATOMICS
+
+#define parcAtomicUint8_Add                parcAtomicUint8_AddImpl
+
+#define parcAtomicUint8_Subtract           parcAtomicUint8_SubtractImpl
+
+#define parcAtomicUint8_CompareAndSwap     parcAtomicUint8_CompareAndSwapImpl
+
+#else
+
+#define parcAtomicUint8_Add(_atomic_uint8_, _addend_) \
+    __sync_add_and_fetch(_atomic_uint8_, _addend_)
+
+#define parcAtomicUint8_Subtract(_atomic_uint8_, _subtrahend_) \
+    __sync_sub_and_fetch(_atomic_uint8_, _subtrahend_)
+
+#define parcAtomicUint8_CompareAndSwap(_atomic_uint8_, _predicate_, _newValue_) \
+    __sync_bool_compare_and_swap(_atomic_uint8_, _predicate_, _newValue_)
+#endif
+
+#define parcAtomicUint8_Increment(_atomic_uint8_) parcAtomicUint8_Add(_atomic_uint8_, 1)
+#define parcAtomicUint8_Decrement(_atomic_uint8_) parcAtomicUint8_Subtract(_atomic_uint8_, 1)
+
+/**
+ * Increase the number of references to a `PARCAtomicUint8` instance.
+ *
+ * Note that new `PARCAtomicUint8` is not created,
+ * only that the given `PARCAtomicUint8` reference count is incremented.
+ * Discard the reference by invoking `parcAtomicUint8_Release`.
+ *
+ * @param [in] instance A pointer to a valid PARCAtomicUint8 instance.
+ *
+ * @return The same value as @p instance.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *
+ *     PARCAtomicUint8 *b = parcAtomicUint8_Acquire();
+ *
+ *     parcAtomicUint8_Release(&a);
+ *     parcAtomicUint8_Release(&b);
+ * }
+ * @endcode
+ */
+PARCAtomicUint8 *parcAtomicUint8_Acquire(const PARCAtomicUint8 *instance);
+
+#ifdef PARCLibrary_DISABLE_VALIDATION
+#  define parcAtomicUint8_OptionalAssertValid(_instance_)
+#else
+#  define parcAtomicUint8_OptionalAssertValid(_instance_) parcAtomicUint8_AssertValid(_instance_)
+#endif
+
+/**
+ * Assert that the given `PARCAtomicUint8` instance is valid.
+ *
+ * @param [in] instance A pointer to a valid PARCAtomicUint8 instance.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *
+ *     parcAtomicUint8_AssertValid(a);
+ *
+ *     printf("Instance is valid.\n");
+ *
+ *     parcAtomicUint8_Release(&b);
+ * }
+ * @endcode
+ */
+void parcAtomicUint8_AssertValid(const PARCAtomicUint8 *instance);
+
+/**
+ * Create an instance of PARCAtomicUint8
+ *
+ * <#Paragraphs Of Explanation#>
+ *
+ * @return non-NULL A pointer to a valid PARCAtomicUint8 instance.
+ * @return NULL An error occurred.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *
+ *     parcAtomicUint8_Release(&b);
+ * }
+ * @endcode
+ */
+PARCAtomicUint8 *parcAtomicUint8_Create(uint8_t);
+
+/**
+ * Compares @p instance with @p other for order.
+ *
+ * Returns a negative integer, zero, or a positive integer as @p instance
+ * is less than, equal to, or greater than @p other.
+ *
+ * @param [in] instance A pointer to a valid PARCAtomicUint8 instance.
+ * @param [in] other A pointer to a valid PARCAtomicUint8 instance.
+ *
+ * @return <0 Instance is less than @p other.
+ * @return 0 Instance a and instance b compare the same.
+ * @return >0 Instance a is greater than instance b.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *     PARCAtomicUint8 *b = parcAtomicUint8_Create();
+ *
+ *     if (parcAtomicUint8_Compare(a, b) == 0) {
+ *         printf("Instances are equal.\n");
+ *     }
+ *
+ *     parcAtomicUint8_Release(&a);
+ *     parcAtomicUint8_Release(&b);
+ * }
+ * @endcode
+ *
+ * @see parcAtomicUint8_Equals
+ */
+int parcAtomicUint8_Compare(const PARCAtomicUint8 *instance, const PARCAtomicUint8 *other);
+
+/**
+ * Create an independent copy the given `PARCBuffer`
+ *
+ * A new buffer is created as a complete copy of the original.
+ *
+ * @param [in] original A pointer to a valid PARCAtomicUint8 instance.
+ *
+ * @return NULL Memory could not be allocated.
+ * @return non-NULL A pointer to a new `PARCAtomicUint8` instance.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *
+ *     PARCAtomicUint8 *copy = parcAtomicUint8_Copy(&b);
+ *
+ *     parcAtomicUint8_Release(&b);
+ *     parcAtomicUint8_Release(&copy);
+ * }
+ * @endcode
+ */
+PARCAtomicUint8 *parcAtomicUint8_Copy(const PARCAtomicUint8 *original);
+
+/**
+ * Determine if two `PARCAtomicUint8` instances are equal.
+ *
+ * The following equivalence relations on non-null `PARCAtomicUint8` instances are maintained: *
+ *   * It is reflexive: for any non-null reference value x, `parcAtomicUint8_Equals(x, x)` must return true.
+ *
+ *   * It is symmetric: for any non-null reference values x and y, `parcAtomicUint8_Equals(x, y)` must return true if and only if
+ *        `parcAtomicUint8_Equals(y x)` returns true.
+ *
+ *   * It is transitive: for any non-null reference values x, y, and z, if
+ *        `parcAtomicUint8_Equals(x, y)` returns true and
+ *        `parcAtomicUint8_Equals(y, z)` returns true,
+ *        then `parcAtomicUint8_Equals(x, z)` must return true.
+ *
+ *   * It is consistent: for any non-null reference values x and y, multiple invocations of `parcAtomicUint8_Equals(x, y)`
+ *         consistently return true or consistently return false.
+ *
+ *   * For any non-null reference value x, `parcAtomicUint8_Equals(x, NULL)` must return false.
+ *
+ * @param [in] x A pointer to a valid PARCAtomicUint8 instance.
+ * @param [in] y A pointer to a valid PARCAtomicUint8 instance.
+ *
+ * @return true The instances x and y are equal.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *     PARCAtomicUint8 *b = parcAtomicUint8_Create();
+ *
+ *     if (parcAtomicUint8_Equals(a, b)) {
+ *         printf("Instances are equal.\n");
+ *     }
+ *
+ *     parcAtomicUint8_Release(&a);
+ *     parcAtomicUint8_Release(&b);
+ * }
+ * @endcode
+ * @see parcAtomicUint8_HashCode
+ */
+bool parcAtomicUint8_Equals(const PARCAtomicUint8 *x, const PARCAtomicUint8 *y);
+
+/**
+ * Returns a hash code value for the given instance.
+ *
+ * The general contract of `HashCode` is:
+ *
+ * Whenever it is invoked on the same instance more than once during an execution of an application,
+ * the `HashCode` function must consistently return the same value,
+ * provided no information used in a corresponding comparisons on the instance is modified.
+ *
+ * This value need not remain consistent from one execution of an application to another execution of the same application.
+ * If two instances are equal according to the {@link parcAtomicUint8_Equals} method,
+ * then calling the {@link parcAtomicUint8_HashCode} method on each of the two instances must produce the same integer result.
+ *
+ * It is not required that if two instances are unequal according to the
+ * {@link parcAtomicUint8_Equals} function,
+ * then calling the `parcAtomicUint8_HashCode`
+ * method on each of the two objects must produce distinct integer results.
+ *
+ * @param [in] instance A pointer to a valid PARCAtomicUint8 instance.
+ *
+ * @return The hashcode for the given instance.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *
+ *     PARCHashCode hashValue = parcAtomicUint8_HashCode(buffer);
+ *     parcAtomicUint8_Release(&a);
+ * }
+ * @endcode
+ */
+PARCHashCode parcAtomicUint8_HashCode(const PARCAtomicUint8 *instance);
+
+/**
+ * Determine if an instance of `PARCAtomicUint8` is valid.
+ *
+ * Valid means the internal state of the type is consistent with its required current or future behaviour.
+ * This may include the validation of internal instances of types.
+ *
+ * @param [in] instance A pointer to a valid PARCAtomicUint8 instance.
+ *
+ * @return true The instance is valid.
+ * @return false The instance is not valid.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *
+ *     if (parcAtomicUint8_IsValid(a)) {
+ *         printf("Instance is valid.\n");
+ *     }
+ *
+ *     parcAtomicUint8_Release(&b);
+ * }
+ * @endcode
+ */
+bool parcAtomicUint8_IsValid(const PARCAtomicUint8 *instance);
+
+/**
+ * Release a previously acquired reference to the given `PARCAtomicUint8` instance,
+ * decrementing the reference count for the instance.
+ *
+ * The pointer to the instance is set to NULL as a side-effect of this function.
+ *
+ * If the invocation causes the last reference to the instance to be released,
+ * the instance is deallocated and the instance's implementation will perform
+ * additional cleanup and release other privately held references.
+ *
+ * @param [in,out] instancePtr A pointer to a pointer to the instance to release.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *a = parcAtomicUint8_Create();
+ *
+ *     parcAtomicUint8_Release(&a);
+ * }
+ * @endcode
+ */
+void parcAtomicUint8_Release(PARCAtomicUint8 **instancePtr);
+
+/**
+ * Get the current value of the given `PARCAtomicUint8` instance.
+ *
+ * @param [in] instance A pointer to a valid `PARCAtomicUint8` instance.
+ *
+ * @return the current value of the given `PARCAtomicUint8` instance.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCAtomicUint8 *instance = parcAtomicUint8_Create(7);
+ *
+ *     uint8_t value = parcAtomicUint8_GetValue(instance);
+ *
+ *     parcAtomicUint8_Release(&instance);
+ * }
+ * @endcode
+ */
+uint8_t parcAtomicUint8_GetValue(const PARCAtomicUint8 *instance);
+#endif