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author | Erlang/OTP <[email protected]> | 2009-11-20 14:54:40 +0000 |
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committer | Erlang/OTP <[email protected]> | 2009-11-20 14:54:40 +0000 |
commit | 84adefa331c4159d432d22840663c38f155cd4c1 (patch) | |
tree | bff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/erl_interface/src/legacy/global_unregister.c | |
download | otp-84adefa331c4159d432d22840663c38f155cd4c1.tar.gz otp-84adefa331c4159d432d22840663c38f155cd4c1.tar.bz2 otp-84adefa331c4159d432d22840663c38f155cd4c1.zip |
The R13B03 release.OTP_R13B03
Diffstat (limited to 'lib/erl_interface/src/legacy/global_unregister.c')
-rw-r--r-- | lib/erl_interface/src/legacy/global_unregister.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/lib/erl_interface/src/legacy/global_unregister.c b/lib/erl_interface/src/legacy/global_unregister.c new file mode 100644 index 0000000000..514dbc3c68 --- /dev/null +++ b/lib/erl_interface/src/legacy/global_unregister.c @@ -0,0 +1,102 @@ +/* + * %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" /* Has to be first */ +#include "eiext.h" +#include "eisend.h" +#include "eirecv.h" +#include "ei_connect_int.h" +#include "erl_interface.h" +#include "erl_connect.h" + +/* remove the association between name and its pid */ +/* global:unregister_name(name) -> ok */ +int erl_global_unregister(int fd, const char *name) +{ + char buf[EISMALLBUF]; + char *bufp=buf; + char tmpbuf[64]; + int index = 0; + erlang_pid *self = erl_self(); + erlang_msg msg; + int i; + int version,arity,msglen; + int needunlink, needatom; + + /* make a self pid */ + self->num = fd; + 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,"unregister_name_external"); /* Fun */ + ei_encode_list_header(buf,&index,1); /* Args: [ name ] */ + ei_encode_atom(buf,&index,name); + 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 unlink and an atom, or just an atom */ + needunlink = 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_UNLINK: + /* got link */ + if (!needunlink) return -1; + needunlink = 0; + break; + + case ERL_SEND: + /* got message - does it contain our atom? */ + if (!needatom) return -1; + else { + /* expecting { rex, ok } */ + 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,"ok")) + return -1; /* bad response from other side */ + + /* we're done here */ + return 0; + } + break; + + default: + return -1; + } + } + + return 0; +} |