NAME

       erl_global - Access globally registered names.

DESCRIPTION

       This  module  provides support for registering, looking up, and unregistering names in the
       global module. For more information, see kernel:global.

       Notice that the functions below perform an RPC using an open file descriptor  provided  by
       the  caller.  This  file  descriptor  must not be used for other traffic during the global
       operation, as the function can then receive unexpected data and fail.

EXPORTS

       char **erl_global_names(fd,count)

              Types:

                 int fd;
                 int *count;

              Retrieves a list of all known global names.

                * fd is an open descriptor to an Erlang connection.

                * count is the address of an integer, or NULL. If count is not NULL, it is set by
                  the function to the number of names found.

              On  success,  the  function  returns  an array of strings, each containing a single
              registered name, and sets count  to  the  number  of  names  found.  The  array  is
              terminated  by  a  single  NULL  pointer. On failure, the function returns NULL and
              count is not modified.

          Note:
              It is the caller's responsibility  to  free  the  array  afterwards.  It  has  been
              allocated by the function with a single call to malloc(), so a single free() is all
              that is necessary.

       int erl_global_register(fd,name,pid)

              Types:

                 int fd;
                 const char *name;
                 ETERM *pid;

              Registers a name in global.

                * fd is an open descriptor to an Erlang connection.

                * name is the name to register in global.

                * pid is the pid that is to be associated with name. This value  is  returned  by
                  global when processes request the location of name.

              Returns 0 on success, otherwise -1.

       int erl_global_unregister(fd,name)

              Types:

                 int fd;
                 const char *name;

              Unregisters a name from global.

                * fd is an open descriptor to an Erlang connection.

                * name is the name to unregister from global.

              Returns 0 on success, otherwise -1.

       ETERM *erl_global_whereis(fd,name,node)

              Types:

                 int fd;
                 const char *name;
                 char *node;

              Looks up a name in global.

                * fd is an open descriptor to an Erlang connection.

                * name is the name that is to be looked up in global.

              If node is not NULL, it is a pointer to a buffer where the function can fill in the
              name of the node where name is found. node can be passed directly to  erl_connect()
              if necessary.

              On  success,  the  function  returns  an  Erlang  pid containing the address of the
              specified name, and the node is initialized to the node name where name  is  found.
              On failure, NULL is returned and node is not modified.