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https://github.com/jart/cosmopolitan.git
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c9152b6f14
This change switches c++ exception handling from sjlj to standard dwarf. It's needed because clang for aarch64 doesn't support sjlj. It turns out that libunwind had a bare-metal configuration that made this easy to do. This change gets the new experimental cosmocc -mclang flag in a state of working so well that it can now be used to build all of llamafile and it goes 3x faster in terms of build latency, without trading away any perf. The int_fast16_t and int_fast32_t types are now always defined as 32-bit in the interest of having more abi consistency between cosmocc -mgcc and -mclang mode.
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/*===---- mm_malloc.h - Allocating and Freeing Aligned Memory Blocks -------===
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*
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* Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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* See https://llvm.org/LICENSE.txt for license information.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*
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*===-----------------------------------------------------------------------===
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*/
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#ifndef __MM_MALLOC_H
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#define __MM_MALLOC_H
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#include <stdlib.h>
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#ifdef _WIN32
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#include <malloc.h>
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#else
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#ifndef __cplusplus
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extern int posix_memalign(void **__memptr, size_t __alignment, size_t __size);
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#else
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// Some systems (e.g. those with GNU libc) declare posix_memalign with an
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// exception specifier. Via an "egregious workaround" in
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// Sema::CheckEquivalentExceptionSpec, Clang accepts the following as a valid
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// redeclaration of glibc's declaration.
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extern "C" int posix_memalign(void **__memptr, size_t __alignment, size_t __size);
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#endif
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#endif
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#if !(defined(_WIN32) && defined(_mm_malloc))
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static __inline__ void *__attribute__((__always_inline__, __nodebug__,
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__malloc__, __alloc_size__(1),
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__alloc_align__(2)))
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_mm_malloc(size_t __size, size_t __align) {
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if (__align == 1) {
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return malloc(__size);
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}
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if (!(__align & (__align - 1)) && __align < sizeof(void *))
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__align = sizeof(void *);
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void *__mallocedMemory;
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#if defined(__MINGW32__)
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__mallocedMemory = __mingw_aligned_malloc(__size, __align);
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#elif defined(_WIN32)
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__mallocedMemory = _aligned_malloc(__size, __align);
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#else
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if (posix_memalign(&__mallocedMemory, __align, __size))
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return 0;
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#endif
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return __mallocedMemory;
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}
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static __inline__ void __attribute__((__always_inline__, __nodebug__))
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_mm_free(void *__p)
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{
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#if defined(__MINGW32__)
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__mingw_aligned_free(__p);
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#elif defined(_WIN32)
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_aligned_free(__p);
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#else
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free(__p);
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#endif
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}
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#endif
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#endif /* __MM_MALLOC_H */
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