[examples] Add common files for examples

Author: chris-durand

examples/common/cxxabi.cpp

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2009-2011, Fabian Greif
+ * Copyright (c) 2010, Martin Rosekeit
+ * Copyright (c) 2012, Sascha Schade
+ * Copyright (c) 2012-2014, Niklas Hauser
+ * Copyright (c) 2018, Christopher Durand
+ *
+ * This file is part of the modm project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+// ----------------------------------------------------------------------------
+
+extern "C"
+{
+	/**
+	 * \brief Pure-virtual workaround.
+	 *
+	 * The avr-libc does not support a default implementation for handling
+	 * possible pure-virtual calls. This is a short and empty workaround for this.
+	 */
+	void
+	__cxa_pure_virtual()
+	{
+		__builtin_abort();
+	}
+
+	__extension__ typedef int __guard __attribute__((mode (__DI__)));
+
+	int
+	__cxa_guard_acquire(__guard *g)
+	{
+		return !*(char *)(g);
+	}
+
+	void
+	__cxa_guard_release (__guard *g)
+	{
+		*(char *)g = 1;
+	}
+
+	void
+	__cxa_guard_abort (__guard *)
+	{
+	}
+
+	int
+	__cxa_atexit (void (* /*destructor*/)(void*), void* /*object*/, void* /*dso_handle*/)
+	{
+		return 0;
+	}
+
+	void* __dso_handle = (void*) &__dso_handle;
+}

examples/common/new.cpp

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+/*
+ * Copyright (c) 2018, Christopher Durand
+ *
+ * This file is part of the modm project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+// ----------------------------------------------------------------------------
+
+#include <new>
+#include <bits/functexcept.h>
+#include <cstdlib>
+#include <cstddef>
+
+template<bool abortOnFail>
+static inline void*
+allocate(size_t size) _GLIBCXX_USE_NOEXCEPT
+{
+	void* ptr = malloc(size);
+
+	if constexpr(abortOnFail) {
+		if(!ptr) {
+			std::__throw_bad_alloc();
+		}
+	}
+
+	return ptr;
+}
+
+void *
+operator new(size_t size) _GLIBCXX_USE_NOEXCEPT
+{
+	return allocate<true>(size);
+}
+
+void *
+operator new[](size_t size) _GLIBCXX_USE_NOEXCEPT
+{
+	return allocate<true>(size);
+}
+
+void*
+operator new(std::size_t size, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
+{
+	return allocate<false>(size);
+}
+
+void*
+operator new[](std::size_t size, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
+{
+	return allocate<false>(size);
+}
+
+void
+operator delete(void* ptr) _GLIBCXX_USE_NOEXCEPT
+{
+	free(ptr);
+}
+
+void
+operator delete(void* ptr, size_t) _GLIBCXX_USE_NOEXCEPT
+{
+	free(ptr);
+}
+
+void
+operator delete[](void* ptr) _GLIBCXX_USE_NOEXCEPT
+{
+	free(ptr);
+}
+
+void
+operator delete[](void* ptr, size_t) _GLIBCXX_USE_NOEXCEPT
+{
+	free(ptr);
+}
+
+void
+operator delete(void* ptr, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
+{
+	free(ptr);
+}
+
+void
+operator delete[](void* ptr, const std::nothrow_t&) _GLIBCXX_USE_NOEXCEPT
+{
+	free(ptr);
+}