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packages/cpprestsdk.v141.2.10.12.1/build/native/include/pplx/threadpool.h

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+/***
+ * Copyright (C) Microsoft. All rights reserved.
+ * Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
+ *
+ *
+ * Simple Linux implementation of a static thread pool.
+ *
+ * For the latest on this and related APIs, please see: https://github.com/Microsoft/cpprestsdk
+ *
+ * =+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
+ ***/
+#pragma once
+
+#if defined(__clang__)
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wconversion"
+#pragma clang diagnostic ignored "-Wunreachable-code"
+#pragma clang diagnostic ignored "-Winfinite-recursion"
+#endif
+#include "boost/asio.hpp"
+#if defined(__clang__)
+#pragma clang diagnostic pop
+#endif
+
+#if defined(__ANDROID__)
+#include "pplx/pplx.h"
+#include <atomic>
+#include <jni.h>
+#endif
+
+#include "cpprest/details/cpprest_compat.h"
+
+namespace crossplat
+{
+#if defined(__ANDROID__)
+// IDEA: Break this section into a separate android/jni header
+extern std::atomic<JavaVM*> JVM;
+JNIEnv* get_jvm_env();
+
+struct java_local_ref_deleter
+{
+    void operator()(jobject lref) const { crossplat::get_jvm_env()->DeleteLocalRef(lref); }
+};
+
+template<class T>
+using java_local_ref = std::unique_ptr<typename std::remove_pointer<T>::type, java_local_ref_deleter>;
+#endif
+
+class threadpool
+{
+public:
+    _ASYNCRTIMP static threadpool& shared_instance();
+    _ASYNCRTIMP static std::unique_ptr<threadpool> __cdecl construct(size_t num_threads);
+
+    virtual ~threadpool() = default;
+
+    /// <summary>
+    /// Initializes the cpprestsdk threadpool with a custom number of threads
+    /// </summary>
+    /// <remarks>
+    /// This function allows an application (in their main function) to initialize the cpprestsdk
+    /// threadpool with a custom threadcount. Libraries should avoid calling this function to avoid
+    /// a diamond problem with multiple consumers attempting to customize the pool.
+    /// </remarks>
+    /// <exception cref="std::exception">Thrown if the threadpool has already been initialized</exception>
+    static void initialize_with_threads(size_t num_threads);
+
+    template<typename T>
+    CASABLANCA_DEPRECATED("Use `.service().post(task)` directly.")
+    void schedule(T task)
+    {
+        service().post(task);
+    }
+
+    boost::asio::io_service& service() { return m_service; }
+
+protected:
+    threadpool(size_t num_threads) : m_service(static_cast<int>(num_threads)) {}
+
+    boost::asio::io_service m_service;
+};
+
+} // namespace crossplat