The R13B03 release.OTP_R13B03

1 files changed, 110 insertions, 0 deletions

diff --git a/lib/erl_interface/src/legacy/global_register.c b/lib/erl_interface/src/legacy/global_register.c
new file mode 100644
index 0000000000..3a4de8b08e
--- /dev/null
+++ b/lib/erl_interface/src/legacy/global_register.c
@@ -0,0 +1,110 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+#include <string.h>
+#include "eidef.h"
+#include "eiext.h"
+#include "eisend.h"
+#include "eirecv.h"
+#include "erl_interface.h"
+
+int erl_global_register(int fd, const char *name, ETERM *pid)
+{
+  char buf[EISMALLBUF];
+  char *bufp=buf;
+  char tmpbuf[64];
+  int index = 0;
+  erlang_pid self;
+  erlang_msg msg;
+  int needlink, needatom;
+  int arity;
+  int version;
+  int msglen;
+  int i;
+
+  /* get that pid into a better format */
+  if (!erl_encode(pid,(unsigned char*)buf)) return -1;
+  if (ei_decode_version(buf,&index,&version)
+      || ei_decode_pid(buf,&index,&self)) return -1;
+  
+  /* set up rpc arguments */
+  /* { PidFrom, { call, Mod, Fun, Args, user }}  */
+  index = 0;
+  ei_encode_version(buf,&index);
+  ei_encode_tuple_header(buf,&index,2);
+  ei_encode_pid(buf,&index,&self);               /* PidFrom */
+  ei_encode_tuple_header(buf,&index,5);
+  ei_encode_atom(buf,&index,"call");            /* call */
+  ei_encode_atom(buf,&index,"global");          /* Mod */
+  ei_encode_atom(buf,&index,"register_name_external");    /* Fun */
+  ei_encode_list_header(buf,&index,3);     /* Args: [ name, self(), cnode ] */
+  ei_encode_atom(buf,&index,name);
+  ei_encode_pid(buf,&index,&self); 
+  ei_encode_tuple_header(buf,&index,2);
+  ei_encode_atom(buf,&index,"global"); /* special "resolve" treatment */ 
+  ei_encode_atom(buf,&index,"cnode");  /* i.e. we get a SEND when conflict */
+  ei_encode_empty_list(buf,&index);
+  ei_encode_atom(buf,&index,"user");            /* user */
+
+  /* make the rpc call */
+  if (ei_send_reg_encoded(fd,&self,"rex",buf,index)) return -1;
+
+  /* get the reply: expect link and an atom, or just an atom */
+  needlink = needatom = 1;
+  while (1) {
+    /* get message */
+    while (1) {
+      index = EISMALLBUF;
+      if (!(i = ei_recv_internal(fd,&bufp,&index,&msg,&msglen,1,0))) continue;
+      else break;
+    }
+
+    switch (i) {
+    case ERL_LINK:
+      /* got link */
+      if (!needlink) return -1;
+	needlink = 0;
+      break;
+      
+    case ERL_SEND:
+      /* got message - does it contain our atom? */
+      if (!needatom) return -1;
+      else {
+	/* expecting { rex, yes } */
+	index = 0;
+	if (ei_decode_version(buf,&index,&version) 
+	    || ei_decode_tuple_header(buf,&index,&arity) 
+	    || (arity != 2) 
+	    || ei_decode_atom(buf,&index,tmpbuf) 
+	    || strcmp(tmpbuf,"rex")
+	    || ei_decode_atom(buf,&index,tmpbuf) 
+	    || strcmp(tmpbuf,"yes"))
+	  return -1; /* bad response from other side */
+
+	/* we're done */
+	return 0;
+      }
+      break;
+      
+    default:
+      return -1; /* something else */
+    }
+  }
+  return 0;
+}
+