GETPAGESIZE(3C) Standard C Library Functions GETPAGESIZE(3C)
NAME
getpagesize - get system page size
SYNOPSIS
#include <unistd.h>
int getpagesize(
void);
DESCRIPTION
The
getpagesize() function returns the number of bytes in a page. Page
granularity is the granularity of many of the memory management calls.
The page size is a system page size and need not be the same as the
underlying hardware page size.
The
getpagesize() function is equivalent to
sysconf(_SC_PAGE_SIZE) and
sysconf(_SC_PAGESIZE). See
sysconf(3C).
RETURN VALUES
The
getpagesize() function returns the current page size.
ERRORS
No errors are defined.
USAGE
The value returned by
getpagesize() need not be the minimum value that
malloc(3C) can allocate. Moreover, the application cannot assume that an
object of this size can be allocated with
malloc().
ATTRIBUTES
See
attributes(7) for descriptions of the following attributes:
+---------------+-----------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------+
|MT-Level | MT-Safe |
+---------------+-----------------+
SEE ALSO
pagesize(1),
brk(2),
getrlimit(2),
mmap(2),
mprotect(2),
munmap(2),
malloc(3C),
msync(3C),
sysconf(3C),
attributes(7) June 27, 2000
GETPAGESIZE(3C)