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server: Use sysconf() instead of getpagesize().

This commit is contained in:
Alexandre Julliard 2013-01-08 22:02:28 +01:00
parent a81996d757
commit 2b97a064e3
1 changed files with 3 additions and 32 deletions
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35
server/mapping.c
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@ -108,36 +108,7 @@ static const struct fd_ops mapping_fd_ops =
static struct list shared_list = LIST_INIT(shared_list);
#ifdef __i386__
/* These are always the same on an i386, and it will be faster this way */
# define page_mask 0xfff
# define page_shift 12
# define init_page_size() do { /* nothing */ } while(0)
#else /* __i386__ */
static int page_shift, page_mask;
static void init_page_size(void)
{
int page_size;
# ifdef HAVE_GETPAGESIZE
page_size = getpagesize();
# else
# ifdef __svr4__
page_size = sysconf(_SC_PAGESIZE);
# else
# error Cannot get the page size on this platform
# endif
# endif
page_mask = page_size - 1;
/* Make sure we have a power of 2 */
assert( !(page_size & page_mask) );
page_shift = 0;
while ((1 << page_shift) != page_size) page_shift++;
}
#endif /* __i386__ */
static size_t page_mask;
#define ROUND_SIZE(size) (((size) + page_mask) & ~page_mask)
@ -474,7 +445,7 @@ static struct object *create_mapping( struct directory *root, const struct unico
int unix_fd;
struct stat st;
if (!page_mask) init_page_size();
if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
if (!(mapping = create_named_object_dir( root, name, attr, &mapping_ops )))
return NULL;
@ -647,7 +618,7 @@ static enum server_fd_type mapping_get_fd_type( struct fd *fd )
int get_page_size(void)
{
if (!page_mask) init_page_size();
if (!page_mask) page_mask = sysconf( _SC_PAGESIZE ) - 1;
return page_mask + 1;
}