-spec info() -> #{pid => pos_integer(), priority => map(), atom() := term()}.

Return map with OS-specific information about current process.

On UNIX-like OSes the map will contain:

• pid - process ID for the VM, returned value should be logically the same as os:getpid/0, however it will be integer instead of string there.

  For more information see man 2 getpid.
• priority - map containing priorities for given process. It will contain 3 keys:
  • process
  • process_group
  • user
  For more info see man 2 getpriority.

• pgid - process group ID.

  For more info see man 2 getpgid.

• parent_pid - process ID of the parent process.

  For more info see man 2 getppid.

• uid - user ID.

  For more info see man 2 getuid.

• gid - group ID.

  For more info see man 2 getgid.

• effective_uid - effective user ID.

  For more info see man 2 geteuid.

• effective_gid - effective group ID.

  For more info see man 2 getegid.

On Windows it will contain:

• pid - process ID for the VM, returned value should be logically the same as os:getpid/0, however it will be integer instead of string there.
• priority - map containing priorities for given process. It will contain 3 keys:
  • class
  • thread
• user_name - name of the owner of the process as binary.

-spec sizes() ->
               #{byte => pos_integer(),
                 int => pos_integer(),
                 long => pos_integer(),
                 long_long => pos_integer(),
                 ptr => pos_integer()}.

Return sizes (in bits) of the primitive values for a given system.

• byte - amount of bits in a byte, where byte is defined as minimal addressable piece of the memory.
• int - amount of bits in int C type.
• long - amount of bits in long C type.
• long_long - amount of bits in long long C type.
• ptr - amount of bits in C pointer type.