View Source: getpagesize(2) - Waikato Linux Users Group

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!!NAME


getpagesize - get system page size
!!SYNOPSIS


 __#include <unistd.h>__


 __size_t getpagesize(void);__
!!DESCRIPTION
Return the number of bytes in a page. This is the system's page size, which is not necessarily the same as the hardware page size.

!!NOTES
getpagesize(2) is implemented as a library function in DLL 4.4.1. Depending on what is defined when the library is compiled, this function returns __EXEC_PAGESIZE__ (set to 4096 in Linux 0.99.11), __NBPG__ (set to 4096 in Linux 0.99.11), or __NBPC__ (not defined in Linux 0.99.11 or DLL 4.4.1 libraries).

!!BUGS
Depending on architecture and library version, this library call may do a system call or not. It may return a value different from that of the system call. For example, on a sun4 with libc5 this routine returns EXEC_PAGESIZE, which is 8192, and not PAGE_SIZE, which is 4096, or the result of the system call, which also is 4096.

!!CONFORMING TO
SVr4, 4.4BSD (this call first appeared in 4.2BSD).

!!SEE ALSO
sbrk(2), mmap(2)

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Last edited on Monday, December 30, 2002 4:20:56 am by PerryLorier

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