mirror of
https://github.com/autc04/Retro68.git
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97 lines
1.7 KiB
C
97 lines
1.7 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <ffi.h>
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#include "fficonfig.h"
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#define MAX_ARGS 256
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/* Define __UNUSED__ that also other compilers than gcc can run the tests. */
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#undef __UNUSED__
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#if defined(__GNUC__)
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#define __UNUSED__ __attribute__((__unused__))
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#else
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#define __UNUSED__
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#endif
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#define CHECK(x) (!(x) ? abort() : (void)0)
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/* Prefer MAP_ANON(YMOUS) to /dev/zero, since we don't need to keep a
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file open. */
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#ifdef HAVE_MMAP_ANON
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# undef HAVE_MMAP_DEV_ZERO
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# include <sys/mman.h>
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# ifndef MAP_FAILED
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# define MAP_FAILED -1
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# endif
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# if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
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# define MAP_ANONYMOUS MAP_ANON
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# endif
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# define USING_MMAP
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#endif
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#ifdef HAVE_MMAP_DEV_ZERO
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# include <sys/mman.h>
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# ifndef MAP_FAILED
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# define MAP_FAILED -1
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# endif
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# define USING_MMAP
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#endif
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/* MinGW kludge. */
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#ifdef _WIN64
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#define PRIdLL "I64d"
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#define PRIuLL "I64u"
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#else
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#define PRIdLL "lld"
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#define PRIuLL "llu"
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#endif
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#ifdef USING_MMAP
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static inline void *
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allocate_mmap (size_t size)
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{
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void *page;
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#if defined (HAVE_MMAP_DEV_ZERO)
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static int dev_zero_fd = -1;
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#endif
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#ifdef HAVE_MMAP_DEV_ZERO
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if (dev_zero_fd == -1)
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{
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dev_zero_fd = open ("/dev/zero", O_RDONLY);
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if (dev_zero_fd == -1)
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{
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perror ("open /dev/zero: %m");
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exit (1);
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}
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}
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#endif
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#ifdef HAVE_MMAP_ANON
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page = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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#endif
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#ifdef HAVE_MMAP_DEV_ZERO
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page = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
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MAP_PRIVATE, dev_zero_fd, 0);
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#endif
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if (page == (char *) MAP_FAILED)
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{
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perror ("virtual memory exhausted");
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exit (1);
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}
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return page;
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}
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#endif
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