Adds map_shm to open and mmap a region of POSIX shared memory.#3
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jnfeinstein wants to merge 4 commits into
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Adds map_shm to open and mmap a region of POSIX shared memory.#3jnfeinstein wants to merge 4 commits into
jnfeinstein wants to merge 4 commits into
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The map_shm function takes a name variable instead of an fd or file. First, map_shm creates and/or attaches to a region of shared memory, which returns an fd. It then calls the usual mmap function with the fd. Finally, it adds an unlink function to the returned buffer. The unlink function marks the shared memory region for deletion, once all processes have detached using unmap (which can be called explicitly or implicitly during destruction as usual). All other functionality of the returned buffer remains the same.
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This series of commits adds the capability to use a shared memory region instead of a file. This functionality can be used to quickly transmit large amounts of data between local processes, including instances of nodeJS.
The first commit contains all functional changes. The other commits are for documentation.