Linux Mmap Shared Memory
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Linux Mmap Shared Memory
If and this is a shared maping, another user process may access and again gain access to what is now kernel memory thanks, and sorry if these questions are pretty basic, but i did not find a clear answer. This flag is supported only. Shared memory (shm) in linux.
Allocate memory that you can then call madvise(2) on which in turn lets you do useful things like prevent data from being. The format of the call is as follows: Map_32bit (since linux 2.4.20, 2.6) put the mapping into the first 2 gigabytes of the process address space.
Shmget is the old system v shared memory model and has the widest support.
All of them, i personally experienced more mmap, shmget is ipc communication of system v, and mmap is system call. Requires librt on some oses. Pa=mmap (addr, len, prot, flags, fildes, off); Map_32bit (since linux 2.4.20, 2.6) put the mapping into the first 2 gigabytes of the process address space.
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