Place the head of the linked list there at a known location (e.g. at the start of the shared region), being careful to make sure that both the linked list itself and the data referenced by it are in the shared memory, not on your heap/stack.
The thing (or rather, the combination of things) you're asking about is quite extensive and a bit niche. You'll have to do research for yourself on this one - don't expect anyone to hand the answers to you on a plate.
There are tutorials on the web for both subjects, so take a look. Search for "beej's guide to ipc" and you'll find some good info about shared memory, and it won't be hard to find examples of how to create linked lists. Combine these two (remembering that you can't use the linked list to "point" to data in your program's address space, you have to ship it all out to the shared memory region) and you're there.
I want to create a shared lib with certain libs statically linked to it. I can generate a fully shared lib as follows:
gcc -maix64 -DHAVE_CONFIG_H -I. -I./src -DHAVE_OPENSSL -I/usr/include/openssl -I/usr/include -I/usr/include/apr-1 -D_LARGEFILE64_SOURCE -I/usr/java8_64/include -shared -o... (0 Replies)
Hello.
I am new to this forum and I would like to ask for advice about low level POSIX programming.
I have to implement a POSIX compliant C shared library.
A file will have some variables and the shared library will have some functions which need those variables.
There is one special... (5 Replies)
Hi all,
I have been working on shared memory. I have created the shared memory and a linked list of 5 nodes. Now I want to attach the linked list to shared memory. When we attach a shared memory it returns a void pointer, but here I am in a fix , how to relate this void pointer to linked list.... (4 Replies)
Hi all,
I have been working on shared memory. I have created the shared memory and a linked list of 5 nodes. Now I want to attach the linked list to shared memory. When we attach a shared memory it returns a void pointer, but here I am in a fix , how to relate this void pointer to linked list.... (1 Reply)
hi,
For some special reason , I'd like to control the memory address for the shared libraries in my dynamically linked process.
And it is the "ld" which interpret the dynamically linked library, and in my system, the "ld-linux.so.2" is put at 0x00812000. Then I use "prelink -r" command to... (3 Replies)
hi,
For some special reason , I'd like to control the memory address for the shared libraries in my dynamically linked process.
And it is the "ld" which interpret the dynamically linked library, and in my system, the "ld-linux.so.2" is put at 0x00812000. Then I use "prelink -r" command to change... (0 Replies)
I am writing a shared library in Linux (but compatible with other UNIXes) and I want to allow multiple instances to share a piece of memory -- 1 byte is enough. What's the "best" way to do this? I want to optimize for speed and portability.
Obviously, I'll have to worry about mutual exclusion. (0 Replies)
I need to create a shared library to access an in memory DB. The DB is not huge, but big enough to make it cumbersome to carry around in every single process using the shared library. Luckily, it is pretty static information, so I don't need to worry much about synchronizing the data between... (12 Replies)
hi,
this is the problem: i want to swap a linked list between 4 processes (unrelated), is there any way i can do that just by sending a pointer to a structure?
//example
typedef struct node
{
int x;
char c;
struct node *next;
} node;
or i should send the items ( x,c ) by... (9 Replies)
I am running HP-UX B.11.11.
I'm increasing a parameter for a database engine so that it uses more memory to buffer the disk drive (to speed up performance). I have over 5GB of memory not being used.
But when I try to start the DB with the increased buffer parameter I get told.
"Not... (1 Reply)