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Posix shared memory and mmap()
Am I correct in my thinking that on system that do not support Posix shared
memory, the alternative way to have shared memory between unrelated processes
is to create a temporary file and then call mmap(... MAP_SHARED).
So why bother implementing Posix shared memory functions (shm_open and
shm_unlink), if the same can be achieved with mmap()?
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