In the output file - i could see the values written only for the 1st iteration but not for the subsequent iteration.
Does this mean the shell is non-POSIX compliant? or how to test whether it is POSIX compliant and whether it works for the sample script.
Does my sample program makes any sense for testing this functionality and if it is how to confirm that multi-threading is acheived using a sample script?
Last edited by fpmurphy; 03-19-2012 at 11:34 PM..
Reason: code tags please!
Windows blows. I'm poor so unix is looking like a great alterative (expecially after my former roommate showed me most of the things it can do). Right now I'm looking at Debian or some other Unix kernel that would run nicley on my computer.
But the problem we had with installing it while he was... (3 Replies)
Discussion started by: beardsman
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How to post a new thread (Regarding Unix related doubts) in Unix Forums.
I registered my id but I am unable to post my Questions to Forum.
Thanks & Regards,
indusri (1 Reply)
Hi,
I have a simulation program which creates two threads and I would like to know if I can measure the time of each individual thread. Threads communicate (I use pthread to manage them) and I want to measure communication time. I found a solution with clock_gettime and CLOCK_THREAD_CPUTIME_ID... (32 Replies)
Hi This is continuation of previos thread
status=running
username=abc
password=123456
server=linux
The script was made which is used to capture the data from file
./scr test status
It will give result running
I have a case like
status = running
username=abc
password=123456... (14 Replies)
Assume that 100 file's of type .txt are saved in directory
in which,
40 .txt files having ID 225 in column x
10 .txt files having ID 220 in column x
30 .txt files having ID 115 in column x
and remaining 20 .txt file's having UNIQUE ID say 226,227,228,229,230....first I want to read only files... (8 Replies)
Discussion started by: Akshay Hegde
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If one enters a Google search query like
site:unix.com mysql php
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LEARN ABOUT HPUX
funlockfile
flockfile(3S)flockfile(3S)NAME
flockfile(), ftrylockfile(), funlockfile() - explicit locking of streams within a multithread application
SYNOPSIS DESCRIPTION
The and functions provide for explicit application-level locking of streams. These functions can be used by a thread to delineate a
sequence of I/O statements that are to be executed as a unit.
The function is used by a thread to acquire ownership of a object.
The function is used by a thread to acquire ownership of a object if the object is available; is a non-blocking version of
The function is used to relinquish the ownership granted to the thread. The behavior is undefined if a thread other than the current owner
calls the function.
Logically, there is a count associated with each stream. This count is implicitly initialized to zero when the stream is created. The
stream is unlocked when the count is zero. When the count is positive, a single thread owns the stream. When the function is called, if
the count is zero or if the count is positive and the caller owns the stream, the count is incremented. Otherwise, the calling thread is
suspended, waiting for the count to return to zero. Each call to decrements the count. This allows matching calls to (or successful calls
to and to be nested.
All POSIX.1 and C standard functions that reference objects behave as if they use and internally to obtain ownership of these objects.
RETURN VALUE
None for and The function returns zero for success and nonzero to indicate that the lock cannot be acquired.
flockfile(3S)