Bug #17665 ยป not-use-mmap-on-cygwin.patch
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#elif defined _WIN32
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void *_aligned_malloc(size_t, size_t);
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res = _aligned_malloc(size, alignment);
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#elif defined(HAVE_MMAP)
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#elif defined(HAVE_MMAP) && !defined(__CYGWIN__)
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GC_ASSERT(alignment % sysconf(_SC_PAGE_SIZE) == 0);
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char *ptr = mmap(NULL, alignment + size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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| ... | ... | |
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__mingw_aligned_free(ptr);
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#elif defined _WIN32
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_aligned_free(ptr);
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#elif defined HAVE_MMAP
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#elif defined HAVE_MMAP && !defined(__CYGWIN__)
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GC_ASSERT(size % sysconf(_SC_PAGE_SIZE) == 0);
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if (munmap(ptr, size)) {
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rb_bug("rb_aligned_free: munmap failed");
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