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Shared memory using threads

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Operating Systems Linux Shared memory using threads
# 1  
Old 06-18-2008
Shared memory using threads
I am looking for C program source code. Could you please help me in finding the source code required mentioned below.

program to create multiple threads (one master thread and rest worker threads) and using the threads write into and read from shared memory


Restrictions:

Only one thread should be able to read at any instant of time into shared memory region.

Only one thread should be able to write at any instant of time into shared memory region.

Worker threads should inform the master thread after every read and write operation.

Master thread inform the worker thread (which is waiting to acquire shared memory region) that read or write operation is successful and it can acquire the memory for either reading and writing operations.
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LEARN ABOUT REDHAT

pthread_kill_other_threads_np

PTHREAD_KILL_OTHER_THREADS_NP(3)			     Library Functions Manual				  PTHREAD_KILL_OTHER_THREADS_NP(3)

NAME

       pthread_kill_other_threads_np - terminate all threads in program except calling thread

SYNOPSIS

       #include <pthread.h>

       void pthread_kill_other_threads_np(void);

DESCRIPTION

       pthread_kill_other_threads_np  is  a  non-portable  LinuxThreads extension.  It causes all threads in the program to terminate immediately,
       except the calling thread which proceeds normally. It is intended to be called just before a thread calls one of the exec  functions,  e.g.
       execve(2).

       Termination  of the other threads is not performed through pthread_cancel(3) and completely bypasses the cancellation mechanism. Hence, the
       current settings for cancellation state and cancellation type are ignored, and the cleanup handlers are	not  executed  in  the	terminated
       threads.

AUTHOR

       Xavier Leroy <Xavier.Leroy@inria.fr>

SEE ALSO

       execve(2), pthread_setcancelstate(3), pthread_setcanceltype(3), pthread_cancel(3).

BUGS

       According to POSIX 1003.1c, a successful exec* in one of the threads should terminate automatically all other threads in the program.  This
       behavior is not yet implemented in LinuxThreads.  Calling pthread_kill_other_threads_np before exec* achieves much of  the  same  behavior,
       except that if exec* ultimately fails, then all other threads are already killed.

								   LinuxThreads 				  PTHREAD_KILL_OTHER_THREADS_NP(3)