Lesson 35 - Get Compute Auth Token Working

Plugins/GameLiftPlugin/Source/AWSSDK/Include/aws/common/ref_count.h

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+#ifndef AWS_COMMON_REF_COUNT_H
+#define AWS_COMMON_REF_COUNT_H
+
+/**
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ * SPDX-License-Identifier: Apache-2.0.
+ */
+#include <aws/common/common.h>
+
+#include <aws/common/atomics.h>
+
+AWS_PUSH_SANE_WARNING_LEVEL
+
+typedef void(aws_simple_completion_callback)(void *);
+
+/*
+ * A utility type for making ref-counted types, reminiscent of std::shared_ptr in C++
+ */
+struct aws_ref_count {
+    struct aws_atomic_var ref_count;
+    void *object;
+    aws_simple_completion_callback *on_zero_fn;
+};
+
+struct aws_shutdown_callback_options {
+    aws_simple_completion_callback *shutdown_callback_fn;
+    void *shutdown_callback_user_data;
+};
+
+AWS_EXTERN_C_BEGIN
+
+/**
+ * Initializes a ref-counter structure.  After initialization, the ref count will be 1.
+ *
+ * @param ref_count ref-counter to initialize
+ * @param object object being ref counted
+ * @param on_zero_fn function to invoke when the ref count reaches zero
+ */
+AWS_COMMON_API void aws_ref_count_init(
+    struct aws_ref_count *ref_count,
+    void *object,
+    aws_simple_completion_callback *on_zero_fn);
+
+/**
+ * Increments a ref-counter's ref count
+ *
+ * @param ref_count ref-counter to increment the count for
+ * @return the object being ref-counted
+ */
+AWS_COMMON_API void *aws_ref_count_acquire(struct aws_ref_count *ref_count);
+
+/**
+ * Decrements a ref-counter's ref count.  Invokes the on_zero callback if the ref count drops to zero
+ * @param ref_count ref-counter to decrement the count for
+ * @return the value of the decremented ref count
+ */
+AWS_COMMON_API size_t aws_ref_count_release(struct aws_ref_count *ref_count);
+
+AWS_EXTERN_C_END
+AWS_POP_SANE_WARNING_LEVEL
+
+#endif /* AWS_COMMON_REF_COUNT_H */