PTHREAD_RWLOCKATTR_DESTROY(3) BSD Library Functions Manual PTHREAD_RWLOCKATTR_DESTROY(3)NAME
pthread_rwlockattr_destroy -- destroy a read/write lock
SYNOPSIS
#include <pthread.h>
int
pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
DESCRIPTION
The pthread_rwlockattr_destroy() function is used to destroy a read/write lock attribute object, previously created with
pthread_rwlockattr_init().
RETURN VALUES
If successful, the pthread_rwlockattr_destroy() function will return zero. Otherwise, an error number will be returned to indicate the
error.
SEE ALSO pthread_rwlockattr_init(3)STANDARDS
The pthread_rwlockattr_destroy() function is expected to conform to Version 2 of the Single UNIX Specification (``SUSv2'').
ERRORS
pthread_rwlockattr_destroy() may fail if:
[EINVAL] The value specified by attr is invalid.
HISTORY
The pthread_rwlockattr_destroy() function first appeared in FreeBSD 3.0.
BSD August 4, 1998 BSD
Check Out this Related Man Page
pthread_rwlockattr_init(3C)pthread_rwlockattr_init(3C)NAME
pthread_rwlockattr_init, pthread_rwlockattr_destroy - initialize or destroy read-write lock attributes object
SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>
int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);
int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
The pthread_rwlockattr_init() function initializes a read-write lock attributes object attr with the default value for all of the
attributes defined by the implementation.
Results are undefined if pthread_rwlockattr_init() is called specifying an already initialized read-write lock attributes object.
After a read-write lock attributes object has been used to initialize one or more read-write locks, any function affecting the attributes
object (including destruction) does not affect any previously initialized read-write locks.
The pthread_rwlockattr_destroy() function destroys a read-write lock attributes object. The effect of subsequent use of the object is unde-
fined until the object is re-initialized by another call to pthread_rwlockattr_init(). An implementation can cause pthread_rwlock-
attr_destroy() to set the object referenced by attr to an invalid value.
If successful, the pthread_rwlockattr_init() and pthread_rwlockattr_destroy() functions return 0. Otherwise, an error number is returned to
indicate the error.
The pthread_rwlockattr_init() function will fail if:
ENOMEM Insufficient memory exists to initialize the read-write lock attributes object.
The pthread_rwlockattr_destroy() function may fail if:
EINVAL The value specified by attr is invalid.
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
pthread_rwlock_init(3C), pthread_rwlock_rdlock(3C), pthread_rwlock_unlock(3C), pthread_rwlock_wrlock(3C), pthread_rwlockattr_getp-
shared(3C), attributes(5), standards(5)
23 Mar 2005 pthread_rwlockattr_init(3C)
Manufacturer Links
General Information
Home Page: IBM United States
Documentation/Information: IBM System p - UNIX servers: Support and services
pSeries and AIX Information Center
Developerworks AIX Wiki: AIX Wiki
AIX for System Administrators
In-depth information from IBM:
IBM... (0 Replies)
Not sure if anyone is interested but I am just getting into UNIX like shell scripting...
I have great interest in pseudo-animations in text mode and accessing HW like /dev/dsp for example...
...
Have fun, I do... ;o)
# !/bin/sh
#
# Bargraph_Generator.sh
#
# A DEMO 6 bit coloured... (0 Replies)
For a starter I know the braces are NOT in the code...
Consider these code snippets:-
#!/bin/bash --posix
x=0
somefunction()
if
then
echo "I am here."
fi
# somefunction
#!/bin/bash --posix
x=0
somefunction()
if (2 Replies)
For those interested in installing dash shell on OSX Lion to help test POSIX compliancy of shell scripts, it is quite easy. I did it like this:
If you don't have gcc on your system:
0. Download and install the Command Line Tools for Xcode package from Sign In - Apple *
1. Download the dash... (2 Replies)
Hearing Aid...
Hi folks yet another bizarre piece of code that is Apple OSX 10.12.x to at least 10.14.1 specific.
It requires only a default OSX install, and the internal microphone along with an external headphone assembly.
Pre-amble, 14-02-2019:
For over 3 weeks now I have been suffering a... (3 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Greetings,
I'm trying to delete a file with a weird name from within Terminal on a Mac.
It's a very old file (1992) with null characters in the name: ââWord FinderÂŽ Plusâ˘.
Here are some examples of what I've tried:
12FX009:5 dpontius$ ls
ââWord FinderÂŽ Plusâ˘
12FX009:5 dpontius$ rm... (29 Replies)
I have to print the number of stars that increases on each line from the minimum number until it reaches the maximum number, and then decreases until it goes back to the minimum number. After printing out the lines of stars, it should also print the total number of stars printed.
I have tried... (13 Replies)
Hi all...
Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default.
Many tricky terminal escape codes are not catered for so I had to create workarounds.
One thing I searched for was this:
Passing perl variable to shell command
AND, @Neo this was... (15 Replies)
Well, guys I saw a question about GOTO for Python.
So this gave me the inspiration to attempt a GOTO function for 'dash', (bash and ksh too).
Machine: MBP OSX 10.14.3, default bash terminal, calling '#!/usr/local/bin/dash'...
This is purely a fun project to see if it is possible in PURE... (3 Replies)
I am sharing a code snippet.
for (( i=0; i<=$(( $count -1 )); i++ ))
do
first=${barr2}
search=${barr1}
echo $first
echo "loop begins"
for (( j=0; j<=5000; j++ ))
do
if } == $search ]]; then
echo $j
break;
fi
done
second=${harr2}
echo $second (2 Replies)
Hi All,
I'm having a python script: test.py in /path/to/script/test.py
I'm using a properties file: test_properties.py (it is having values as dictionary{}) which is in same DIR as the script.
Sample Properties file:
params = {
'target_db' : 'a1_db'
'src_db' : ... (15 Replies)