mirror of https://gitlab.freedesktop.org/mesa/mesa
96 lines
2.9 KiB
C
96 lines
2.9 KiB
C
/*
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* Copyright © 2020 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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 (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef U_QSORT_H
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#define U_QSORT_H
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#include <stdlib.h>
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#include "detect_os.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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void util_tls_qsort_r(void *base, size_t nmemb, size_t size,
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int (*compar)(const void *, const void *, void *),
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void *arg);
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struct util_qsort_adapter_data {
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int (*compar)(const void*, const void*, void*);
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void *args;
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};
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/**
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* Converts comparison function arguments
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* from [MSVC, BSD, macOS]
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* (void *ctx, const void *elem1, const void *elem2)
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* to [GNU, C11]
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* (const void *elem1, const void *elem2, void *ctx);
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*/
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int util_qsort_adapter(void *ctx, const void *elem1, const void *elem2);
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static inline void
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util_qsort_r(void *base, size_t nmemb, size_t size,
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int (*compar)(const void *, const void *, void *),
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void *arg)
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{
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#if defined(HAVE_GNU_QSORT_R)
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/* GNU extension added in glibc 2.8 */
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qsort_r(base, nmemb, size, compar, arg);
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#elif defined(HAVE_BSD_QSORT_R)
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/* BSD/macOS qsort_r takes "arg" before the comparison function and it
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* pass the "arg" before the elements.
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*/
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struct util_qsort_adapter_data data = {
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compar,
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arg
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};
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qsort_r(base, nmemb, size, &data, util_qsort_adapter);
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#elif HAVE_QSORT_S
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# ifdef _WIN32
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/* MSVC/MinGW qsort_s takes "arg" after the comparison function and it
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* pass the "arg" before the elements.
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*/
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struct util_qsort_adapter_data data = {
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compar,
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arg
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};
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qsort_s(base, nmemb, size, util_qsort_adapter, &data);
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# else
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/* C11 added qsort_s */
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qsort_s(base, nmemb, size, compar, arg);
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# endif
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#else
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/* Fall-back to using thread local storage */
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util_tls_qsort_r(base, nmemb, size, compar, arg);
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#endif
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}
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* U_QSORT_H */
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