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Differences between version 2 and predecessor to the previous major change of getpagesize(2).
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| Newer page: | version 2 | Last edited on Monday, December 30, 2002 4:20:56 am | by PerryLorier | Revert |
| Older page: | version 1 | Last edited on Tuesday, June 4, 2002 12:23:41 am | by perry | Revert |
@@ -1,55 +1,26 @@
-GETPAGESIZE
-!!!GETPAGESIZE
-NAME
-SYNOPSIS
-DESCRIPTION
-NOTES
-BUGS
-CONFORMING TO
-SEE ALSO
-----
+
!!NAME
getpagesize - get system page size
!!SYNOPSIS
-__#include __
+
__#include <unistd.h>
__
-__size_t getpagesize(void);__
+
__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.
-
-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).
-
-__getpagesize__ 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.
-
-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).
-
-SVr4, 4.4BSD (this call first appeared in
-4.2BSD).
!!SEE ALSO
-
-
-
-----
+sbrk(2), mmap(2)
