initial commit, 4.5 stable

modules/jolt_physics/spaces/jolt_temp_allocator.cpp

@@ -0,0 +1,120 @@
+/**************************************************************************/
+/*  jolt_temp_allocator.cpp                                               */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+/*
+Adapted to Godot from the Jolt Physics library.
+*/
+
+/*
+Copyright 2021 Jorrit Rouwe
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR
+A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include "jolt_temp_allocator.h"
+
+#include "../jolt_project_settings.h"
+
+#include "core/variant/variant.h"
+
+#include "Jolt/Core/Memory.h"
+
+namespace {
+
+template <typename TValue, typename TAlignment>
+constexpr TValue align_up(TValue p_value, TAlignment p_alignment) {
+	return (p_value + p_alignment - 1) & ~(p_alignment - 1);
+}
+
+} //namespace
+
+JoltTempAllocator::JoltTempAllocator() :
+		capacity((uint64_t)JoltProjectSettings::temp_memory_b),
+		base(static_cast<uint8_t *>(JPH::Allocate((size_t)capacity))) {
+}
+
+JoltTempAllocator::~JoltTempAllocator() {
+	JPH::Free(base);
+}
+
+void *JoltTempAllocator::Allocate(uint32_t p_size) {
+	if (p_size == 0) {
+		return nullptr;
+	}
+
+	p_size = align_up(p_size, 16U);
+
+	const uint64_t new_top = top + p_size;
+
+	void *ptr = nullptr;
+
+	if (new_top <= capacity) {
+		ptr = base + top;
+	} else {
+		WARN_PRINT_ONCE(vformat("Jolt Physics temporary memory allocator exceeded capacity of %d MiB. "
+								"Falling back to slower general-purpose allocator. "
+								"Consider increasing maximum temporary memory in project settings.",
+				JoltProjectSettings::temp_memory_mib));
+
+		ptr = JPH::Allocate(p_size);
+	}
+
+	top = new_top;
+
+	return ptr;
+}
+
+void JoltTempAllocator::Free(void *p_ptr, uint32_t p_size) {
+	if (p_ptr == nullptr) {
+		return;
+	}
+
+	p_size = align_up(p_size, 16U);
+
+	const uint64_t new_top = top - p_size;
+
+	if (top <= capacity) {
+		if (base + new_top != p_ptr) {
+			CRASH_NOW_MSG("Jolt Physics temporary memory was freed in the wrong order.");
+		}
+	} else {
+		JPH::Free(p_ptr);
+	}
+
+	top = new_top;
+}