First Commit

common/AlignedMalloc.cpp

@@ -0,0 +1,50 @@
+// SPDX-FileCopyrightText: 2002-2025 PCSX2 Dev Team
+// SPDX-License-Identifier: GPL-3.0+
+
+// This module contains implementations of _aligned_malloc for platforms that don't have
+// it built into their CRT/libc.
+
+#if !defined(_WIN32)
+
+#include "common/AlignedMalloc.h"
+#include "common/Assertions.h"
+
+#include <algorithm>
+#include <cstdlib>
+
+void* _aligned_malloc(size_t size, size_t align)
+{
+	pxAssert(align < 0x10000);
+#if defined(__USE_ISOC11) && !defined(ASAN_WORKAROUND) // not supported yet on gcc 4.9
+	return aligned_alloc(align, size);
+#else
+#ifdef __APPLE__
+	// MacOS has a bug where posix_memalign is ridiculously slow on unaligned sizes
+	// This especially bad on M1s for some reason
+	size = (size + align - 1) & ~(align - 1);
+#endif
+	void* result = 0;
+	posix_memalign(&result, align, size);
+	return result;
+#endif
+}
+
+void* pcsx2_aligned_realloc(void* handle, size_t new_size, size_t align, size_t old_size)
+{
+	pxAssert(align < 0x10000);
+
+	void* newbuf = _aligned_malloc(new_size, align);
+
+	if (newbuf != NULL && handle != NULL)
+	{
+		memcpy(newbuf, handle, std::min(old_size, new_size));
+		_aligned_free(handle);
+	}
+	return newbuf;
+}
+
+__fi void _aligned_free(void* pmem)
+{
+	free(pmem);
+}
+#endif