Linux and UNIX Man Pages

Linux & Unix Commands - Search Man Pages

lock(9) [netbsd man page]

LOCK(9) 						   BSD Kernel Developer's Manual						   LOCK(9)

lock, simple_lock_init, simple_lock, simple_lock_try, simple_unlock, simple_lock_freecheck, simple_lock_dump, lockinit, lockmgr, lockstatus, lockmgr_printinfo, spinlockinit, spinlockmgr -- kernel lock functions DESCRIPTION
These interfaces have been obsoleted and removed from the system. Please see the condvar(9), mutex(9), and rwlock(9) manual pages for information on kernel synchronisation primitives. SEE ALSO
condvar(9), mutex(9), rwlock(9) HISTORY
The kernel locking API first appeared in 4.4BSD-lite2, and was replaced in NetBSD 5.0. BSD
January 30, 2008 BSD

Check Out this Related Man Page

simple_lock(9r) 														   simple_lock(9r)

simple_lock - General: Asserts a simple lock SYNOPSIS
#include <kern/lock.h> void simple_lock( simple_lock_t slock_ptr ); ARGUMENTS
Specifies a pointer to a simple lock structure. You can declare this simple lock structure by using the decl_simple_lock_data routine. DESCRIPTION
The simple_lock routine asserts a lock with exclusive access for the resource associated with the specified slock structure pointer. This means that no other kernel thread can gain access to the locked resource until you call simple_unlock to release it. Because simple locks are spin locks, simple_lock does not return until the lock has been obtained. NOTES
You must call simple_lock_init (once only) prior to calling simple_lock to initialize the simple lock structure for the resource. A resource, from the kernel module's standpoint, is data that more than one kernel thread can manipulate. You can store the resource in global variables and in data structure members. RETURN VALUES
Routines: decl_simple_lock_data(9r), simple_lock_init(9r), simple_lock_terminate(9r), simple_lock_try(9r), simple_unlock(9r) Data Structures: slock(9s) simple_lock(9r)
Man Page

15 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Delete a block of text delimited by blank lines when pattern is found

I have a file which contains blocks of text - each block is a multi-lines text delimited by blank lines eg. <blank line> several lines of text ... pattern found on this line several more lines of text ... <blank line> How do you delete the block of text (including the blank lines) when... (17 Replies)
Discussion started by: gleu
17 Replies

2. Solaris

Unable to run xclock

Hello. I am trying to run xclock on newly built solaris box - These are the steps I followed: # DISPLAY=localhost:0.0 # export DISPLAY # xclock xclock: not found # cd /usr/openwin/bin # ./xclock Error: Can't open display: localhost:0.0 # Please suggest, what am i doing wrong? Thank... (27 Replies)
Discussion started by: panchpan
27 Replies

3. Shell Programming and Scripting

Remove a block of Text at regular intervals

Hello all, I have a text files that consists of blocks of text. Each block of text represents a set of Cartesian coordinates for a molecule. Each block of text starts with a line that has a only a number, which is equal to the total number of atoms in the molecule. After this number is a line... (15 Replies)
Discussion started by: marcozd
15 Replies

4. Shell Programming and Scripting

Scanning alignment and "extracting" blocks

I have been thinking how to go around this problem but I just do not find a way to do it. So, I finally decided to ask. I have a real bunch of different sequences of different lenghts aligned in the following format: Now, what I need is a 'window' of let say 10 characters that I have to 'slide'... (19 Replies)
Discussion started by: Xterra
19 Replies

5. Shell Programming and Scripting

[uniq + awk?] How to remove duplicate blocks of lines in files?

Hello again, I am wanting to remove all duplicate blocks of XML code in a file. This is an example: input: <string-array name="threeItems"> <item>item1</item> <item>item2</item> <item>item3</item> </string-array> <string-array name="twoItems"> <item>item1</item> <item>item2</item>... (19 Replies)
Discussion started by: raidzero
19 Replies

6. UNIX for Dummies Questions & Answers

Command rm deletes filename but not the blocks

Hi It happens when I try to delete a file of 250MB with the command rm -r on our old Intergraph CLIX that the filename disappears while the blocks remain on the machine. Only when I reboot the system the blocks really disappear. Then rm works again for sometime but after some time it happens... (15 Replies)
Discussion started by: hausi2012
15 Replies

7. Shell Programming and Scripting

Transpose info that is within blocks

Hello to all in forum, I have a big file with blocks of data. Each block begins with "BeginOfRecord".... (17 Replies)
Discussion started by: Ophiuchus
17 Replies

8. Shell Programming and Scripting

Extract sequences of bytes from binary for differents blocks

Hello to all, I would like to search sequences of bytes inside big binary file. The bin file contains blocks of information, each block begins is estructured as follow: 1- Each block begins with the hex 32 (1 byte) and ends with FF. After the FF of the last block, it follows 33. 2- Next... (59 Replies)
Discussion started by: Ophiuchus
59 Replies

9. UNIX for Dummies Questions & Answers

Extracting a block of text from a large file using variables?

Hi UNIX Members, I've been tasked with performing the following: Extract a block of data in column form #This data changes each time, therefore automating future procedures Please Note the following: line = reading a line from a file_list that leads to the data The filename is called... (16 Replies)
Discussion started by: Klor
16 Replies

10. Shell Programming and Scripting

Get values block by block in same file

I have a file say "SAMPLE.txt" with following content, P1 10,9:6/123456 P2 blah blah P1 10,9:5/98765 P2 blah blah P1 blah blah P2 I want a output file say "RESULT.txt" as, Value1:123456 Value2:98765 Value3:NULL (17 Replies)
Discussion started by: garvit184
17 Replies

11. Shell Programming and Scripting

How can I extract XML block around matching search string?

I want to extract XML block surrounding search string Ex: print XML block for string "myapp1-ear" surrounded by "<application> .. </application>" Input XML: <?xml version="1.0" encoding="UTF-8"?> <deployment-request> <requestor> <first-name>kchinnam</first-name> ... (16 Replies)
Discussion started by: kchinnam
16 Replies

12. Shell Programming and Scripting

Sed: -e expression #1, char 16: unterminated address regex

I am trying to grep for a particular text (Do action on cell BL330) in a text file(sample.gz) which is searched in the content filtered by date+timestamp (2016-09-14 01:09:56,796 to 2016-09-15 04:10:29,719) on a remote machine and finally write the output into a output file on a local machine. ... (23 Replies)
Discussion started by: rbadveti
23 Replies

13. UNIX for Beginners Questions & Answers

Sorting blocks by a section of the identifier

I have a file that should be sorted by a string (shown in red in my example below) in the identifier. The RS is ^@M0, something like this: @M04961:22:000000000-B5VGJ:1:1101:9280:7106 1:N:0:86 GGCATGAAAACATACAAACCGTCTTTCCAGAAATTGTTCCAAGTATCGGCAACAGCTTTATCAATACCATGAAAAATATCAACCACACCAGAAGCAGCAT... (16 Replies)
Discussion started by: Xterra
16 Replies

14. Solaris

Help with Reviving a NETRA240 Pls?

Hi Everybody, Hope everybody is having fun with their Solaris installations and not pulling out too much of whatever hair they have left so far. :) Just for sport, I bought an old Netra 240 used by Northern Telecom Turkish subsidiary Netas here in Turkey. My hope is to turn this into an ugly... (33 Replies)
Discussion started by: ozsavran
33 Replies

15. Shell Programming and Scripting

Convert ip ranges to CIDR netblock

2 scripts to convert IP ranges to CIDR notation using awk, gawk or mawk. The scripts are much faster than using ipcalc and will return the same results. The first script is reliably compatible with awk, gawk and mawk but is over 3 times as slow as the second script which is reliably compatible with... (38 Replies)
Discussion started by: azdps
38 Replies