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5c8c714a0a
The qemu_try_memalign() functions for POSIX and Windows used to be significantly different, but these days they are identical except for the actual allocation function called, and the POSIX version already has to have ifdeffery for different allocation functions. Move to a single implementation in memalign.c, which uses the Windows _aligned_malloc if we detect that function in meson. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20220226180723.1706285-7-peter.maydell@linaro.org Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
/*
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* memalign.c: Allocate an aligned memory region
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2010-2016 Red Hat, Inc.
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* Copyright (c) 2022 Linaro Ltd
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qemu/host-utils.h"
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#include "trace.h"
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void *qemu_try_memalign(size_t alignment, size_t size)
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{
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void *ptr;
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if (alignment < sizeof(void*)) {
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alignment = sizeof(void*);
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} else {
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g_assert(is_power_of_2(alignment));
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}
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/*
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* Handling of 0 allocations varies among the different
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* platform APIs (for instance _aligned_malloc() will
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* fail) -- ensure that we always return a valid non-NULL
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* pointer that can be freed by qemu_vfree().
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*/
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if (size == 0) {
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size++;
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}
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#if defined(CONFIG_POSIX_MEMALIGN)
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int ret;
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ret = posix_memalign(&ptr, alignment, size);
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if (ret != 0) {
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errno = ret;
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ptr = NULL;
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}
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#elif defined(CONFIG_ALIGNED_MALLOC)
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ptr = _aligned_malloc(size, alignment);
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#elif defined(CONFIG_BSD)
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ptr = valloc(size);
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#else
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ptr = memalign(alignment, size);
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#endif
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trace_qemu_memalign(alignment, size, ptr);
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return ptr;
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}
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void *qemu_memalign(size_t alignment, size_t size)
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{
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void *p = qemu_try_memalign(alignment, size);
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if (p) {
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return p;
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}
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fprintf(stderr,
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"qemu_memalign: failed to allocate %zu bytes at alignment %zu: %s\n",
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size, alignment, strerror(errno));
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abort();
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}
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