GETPAGESIZE(3) BSD Library Functions Manual GETPAGESIZE(3)NAME
getpagesize -- get system page size
LIBRARY
Standard C Library (libc, -lc)
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 may not be the same as the underlying hardware page size.
SEE ALSO pagesize(1), sbrk(2)HISTORY
The getpagesize() function appeared in 4.2BSD.
BSD June 4, 1993 BSD
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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(5) 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(5)SunOS 5.10 27 Jun 2000 getpagesize(3C)
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OFFSET=100;
PAGESIZE=4096;
int dummy_last;
TOPSTACK = (caddr_t)(&dummy_last - OFFSET);
TOPSTACK = (caddr_t)((unsigned long)TOPSTACK -
((unsigned long)TOPSTACK % PAGESIZE));
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111223333
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Hi
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int A;
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Hi guys,
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