1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 2000 by Sun Microsystems, Inc.
24 * All rights reserved.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include <stdio.h>
30 #include <fcode/private.h>
31 #include <fcode/log.h>
32
33 static int envp;
34 static int envc;
35 static fcode_env_t *envs[4];
36
37 static void
do_clone(fcode_env_t * cenv)38 do_clone(fcode_env_t *cenv)
39 {
40 fcode_env_t *new;
41
42 if (envc < 4) {
43 envs[envc] = env;
44 envc++;
45 new = clone_environment(cenv, NULL);
46 if (new) {
47 envs[envc] = new;
48 env = new;
49 return;
50 }
51 }
52 system_message(cenv, "clone failed");
53 }
54
55 static void
do_switch(fcode_env_t * cenv)56 do_switch(fcode_env_t *cenv)
57 {
58 int bail = 4;
59 do {
60 envp = (envp+1)%4;
61 env = envs[envp];
62 bail--;
63 } while ((env == NULL) && (!bail));
64 log_message(MSG_INFO, "Env: %x\n", env);
65 }
66
67 static void
do_release(fcode_env_t * cenv)68 do_release(fcode_env_t *cenv)
69 {
70 int bail = 4;
71 destroy_environment(envs[envp]);
72 envs[envp] = NULL;
73 do {
74 envp = (envp+1)%4;
75 env = envs[envp];
76 bail--;
77 } while ((env == NULL) && (!bail));
78 }
79
80 #pragma init(_init)
81
82 static void
_init(void)83 _init(void)
84 {
85 fcode_env_t *env = initial_env;
86
87 ASSERT(env);
88 NOTICE;
89
90 envp = 0;
91 envc = 0;
92
93 FORTH(0, "clone", do_clone);
94 FORTH(0, "switch", do_switch);
95 FORTH(0, "release", do_release);
96 }
97