How to initialize mmap library in VxWorks


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users How to initialize mmap library in VxWorks
# 1  
Old 12-13-2007
How to initialize mmap library in VxWorks

Hi Srinivasrao

Last edited by psr100; 12-14-2007 at 02:59 AM..
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

VxWorks OS

Hello, Im not sure if Im on the right place, maybe someone can help me or tell me where else to ask. I have file with english words, which i would like to translate to my language, of course there are CRCs which I can not identify. hope someone has some experience with vxworks and can... (0 Replies)
Discussion started by: barton
0 Replies

2. Emergency UNIX and Linux Support

mmap

I want to know whether this is possile or ever been tried out. I want to obtain a chuck of memory using mmap() I do it so : n = mmap(0, 8000, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); And hold on to that memory, when a process requests for memory, some memory is... (2 Replies)
Discussion started by: xerox
2 Replies

3. Homework & Coursework Questions

mmap

Descriptions: Develop a program that uses mmap() to map a file to memory space. Prepare such a file by yourself and do the follows. <LI class=MsoNormal>Display the content of the file after mapping; <LI class=MsoNormal>Output how many digits included in the file; <LI class=MsoNormal>Replace... (1 Reply)
Discussion started by: gokult
1 Replies

4. Programming

mmap()

how to use mmap() to map a file to memory space. Do you have any simple program???? Because I have to implement lot of concepts into it. (5 Replies)
Discussion started by: gokult
5 Replies

5. UNIX for Advanced & Expert Users

VxWorks target server

hi all. i have omniswitch 6800 that runs vxworks 5.4.x The folder that is result of compiling my image consists of : -rw-r--r-- 1 root other 8128249 Jun 21 05:21 Kbase.img -rw-r--r-- 1 root other 971810 Jun 21 06:07 Kos.img -rw-r--r-- 1 root other 295076 Jun 21... (0 Replies)
Discussion started by: sadgb
0 Replies

6. UNIX for Advanced & Expert Users

GigE Vision driver for VxWorks

Hello, has anybody implemented a driver for the GigE camera interface standard GigE Vision for VxWorks or knows where to aquire it? I have contacted all GigE Vision camera vendors, but most of them only have support for Windows and Linux and nobody does for VxWorks. Best regards, Anna (1 Reply)
Discussion started by: iq128
1 Replies

7. IP Networking

Porting DHCP from Linux to VxWorks

DHCP Porting (2 Replies)
Discussion started by: Sunny Shivam
2 Replies

8. Linux

Porting DHCP from Linux to VxWorks

Hello All, I have a code of DHCP which is implemented on Linux. During porting this code from Linux to VxWorks, I come up with following errors:- jects\freedom\ap\udhcp\socket.c C:\projects\freedom\ap\udhcp\socket.c: In function `read_interface': C:\projects\freedom\ap\udhcp\socket.c:79:... (1 Reply)
Discussion started by: Sunny Shivam
1 Replies

9. UNIX for Dummies Questions & Answers

VxWorks O.S

is there any system call in linux which maps to taskSpawn ( ) in VxWorks RTOS (1 Reply)
Discussion started by: Agnello
1 Replies

10. Filesystems, Disks and Memory

mmap

Hello. I'm writing some random access i/o software on Solaris 8 using mmap64 to memory map large files (my test file is ~25 GB). The abbreviated code fragment is: fd = open(cbuf,O_RDONLY|O_LARGEFILE); struct stat statbuf; fstat(fd,&statbuf); off_t len =... (0 Replies)
Discussion started by: gusm
0 Replies
Login or Register to Ask a Question
MMAP2(2)						     Linux Programmer's Manual							  MMAP2(2)

NAME
mmap2 - map files or devices into memory SYNOPSIS
#include <sys/mman.h> void *mmap2(void *addr, size_t length, int prot, int flags, int fd, off_t pgoffset); DESCRIPTION
The mmap2() system call operates in exactly the same way as mmap(2), except that the final argument specifies the offset into the file in 4096-byte units (instead of bytes, as is done by mmap(2)). This enables applications that use a 32-bit off_t to map large files (up to 2^44 bytes). RETURN VALUE
On success, mmap2() returns a pointer to the mapped area. On error -1 is returned and errno is set appropriately. ERRORS
EFAULT Problem with getting the data from userspace. EINVAL (Various platforms where the page size is not 4096 bytes.) offset * 4096 is not a multiple of the system page size. mmap2() can return any of the same errors as mmap(2). VERSIONS
mmap2() is available since Linux 2.3.31. CONFORMING TO
This system call is Linux-specific. NOTES
Nowadays, the glibc mmap() wrapper function invokes this system call rather than the mmap(2) system call. On ia64, the unit for offset is actually the system page size, rather than 4096 bytes. SEE ALSO
getpagesize(2), mmap(2), mremap(2), msync(2), shm_open(3) COLOPHON
This page is part of release 3.25 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2008-04-22 MMAP2(2)