初始化内容

third/JoltPhysics/Jolt/Core/Memory.cpp

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+// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
+// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
+// SPDX-License-Identifier: MIT
+
+#include <Jolt/Jolt.h>
+
+JPH_SUPPRESS_WARNINGS_STD_BEGIN
+#include <cstdlib>
+JPH_SUPPRESS_WARNINGS_STD_END
+#include <stdlib.h>
+
+JPH_NAMESPACE_BEGIN
+
+#ifdef JPH_DISABLE_CUSTOM_ALLOCATOR
+	#define JPH_ALLOC_FN(x)	x
+	#define JPH_ALLOC_SCOPE
+#else
+	#define JPH_ALLOC_FN(x)	x##Impl
+	#define JPH_ALLOC_SCOPE static
+#endif
+
+JPH_ALLOC_SCOPE void *JPH_ALLOC_FN(Allocate)(size_t inSize)
+{
+	JPH_ASSERT(inSize > 0);
+	return malloc(inSize);
+}
+
+JPH_ALLOC_SCOPE void *JPH_ALLOC_FN(Reallocate)(void *inBlock, [[maybe_unused]] size_t inOldSize, size_t inNewSize)
+{
+	JPH_ASSERT(inNewSize > 0);
+	return realloc(inBlock, inNewSize);
+}
+
+JPH_ALLOC_SCOPE void JPH_ALLOC_FN(Free)(void *inBlock)
+{
+	free(inBlock);
+}
+
+JPH_ALLOC_SCOPE void *JPH_ALLOC_FN(AlignedAllocate)(size_t inSize, size_t inAlignment)
+{
+	JPH_ASSERT(inSize > 0 && inAlignment > 0);
+
+#if defined(JPH_PLATFORM_WINDOWS)
+	// Microsoft doesn't implement posix_memalign
+	return _aligned_malloc(inSize, inAlignment);
+#else
+	void *block = nullptr;
+	JPH_SUPPRESS_WARNING_PUSH
+	JPH_GCC_SUPPRESS_WARNING("-Wunused-result")
+	JPH_CLANG_SUPPRESS_WARNING("-Wunused-result")
+	posix_memalign(&block, inAlignment, inSize);
+	JPH_SUPPRESS_WARNING_POP
+	return block;
+#endif
+}
+
+JPH_ALLOC_SCOPE void JPH_ALLOC_FN(AlignedFree)(void *inBlock)
+{
+#if defined(JPH_PLATFORM_WINDOWS)
+	_aligned_free(inBlock);
+#else
+	free(inBlock);
+#endif
+}
+
+#ifndef JPH_DISABLE_CUSTOM_ALLOCATOR
+
+AllocateFunction Allocate = nullptr;
+ReallocateFunction Reallocate = nullptr;
+FreeFunction Free = nullptr;
+AlignedAllocateFunction AlignedAllocate = nullptr;
+AlignedFreeFunction AlignedFree = nullptr;
+
+void RegisterDefaultAllocator()
+{
+	Allocate = AllocateImpl;
+	Reallocate = ReallocateImpl;
+	Free = FreeImpl;
+	AlignedAllocate = AlignedAllocateImpl;
+	AlignedFree = AlignedFreeImpl;
+}
+
+#endif // JPH_DISABLE_CUSTOM_ALLOCATOR
+
+JPH_NAMESPACE_END