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Add compile errors for 64 bit OS without an equivalent of MAP_32BIT.

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Mike Pall 2010-03-02 19:41:56 +01:00
parent eed5585c51
commit 1cda54a3ab
1 changed files with 17 additions and 4 deletions
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21
src/lj_alloc.c
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@ -160,16 +160,29 @@ static LJ_AINLINE int CALL_MUNMAP(void *ptr, size_t size)
#define MMAP_PROT (PROT_READ|PROT_WRITE)
#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
#define MAP_ANONYMOUS MAP_ANON
#endif /* MAP_ANON */
#endif
#define MMAP_FLAGS (MAP_PRIVATE|MAP_ANONYMOUS)
#if LJ_64
#define MMAP_FLAGS (MAP_PRIVATE|MAP_ANONYMOUS|MAP_32BIT)
/* Need special support for allocating memory in the lower 2GB. */
#if defined(__linux__)
/* Actually this only gives us max. 1GB in current Linux kernels. */
#define CALL_MMAP(s) mmap(0, (s), MMAP_PROT, MAP_32BIT|MMAP_FLAGS, -1, 0)
#elif defined(__MACH__) && defined(__APPLE__)
#error "NYI: no support for 64 bit OSX (yet)"
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
/* FreeBSD 64 bit kernel ignores mmap() hints for lower 8GB of memory. */
#error "No support for 64 bit FreeBSD"
#else
#define MMAP_FLAGS (MAP_PRIVATE|MAP_ANONYMOUS)
#error "NYI: need an equivalent of MAP_32BIT for this 64 bit OS"
#endif
#else
#define CALL_MMAP(s) mmap(0, (s), MMAP_PROT, MMAP_FLAGS, -1, 0)
#endif
#define INIT_MMAP() ((void)0)
#define CALL_MMAP(s) mmap(0, (s), MMAP_PROT, MMAP_FLAGS, -1, 0)
#define DIRECT_MMAP(s) CALL_MMAP(s)
#define CALL_MUNMAP(a, s) munmap((a), (s))