aboutsummaryrefslogtreecommitdiffstats
path: root/lib/erl_interface/src/legacy/global_register.c
diff options
context:
space:
mode:
authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/erl_interface/src/legacy/global_register.c
downloadotp-84adefa331c4159d432d22840663c38f155cd4c1.tar.gz
otp-84adefa331c4159d432d22840663c38f155cd4c1.tar.bz2
otp-84adefa331c4159d432d22840663c38f155cd4c1.zip
The R13B03 release.OTP_R13B03
Diffstat (limited to 'lib/erl_interface/src/legacy/global_register.c')
-rw-r--r--lib/erl_interface/src/legacy/global_register.c110
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;
+}
+