Commit | Line | Data |
---|---|---|
d26e3629 KY |
1 | /* The ptid_t type and common functions operating on it. |
2 | ||
0b302171 | 3 | Copyright (C) 1986, 1988-2012 Free Software Foundation, Inc. |
d26e3629 KY |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "ptid.h" | |
21 | ||
22 | /* Oft used ptids */ | |
23 | ptid_t null_ptid = { 0, 0, 0 }; | |
24 | ptid_t minus_one_ptid = { -1, 0, 0 }; | |
25 | ||
26 | /* Create a ptid given the necessary PID, LWP, and TID components. */ | |
27 | ||
28 | ptid_t | |
29 | ptid_build (int pid, long lwp, long tid) | |
30 | { | |
31 | ptid_t ptid; | |
32 | ||
33 | ptid.pid = pid; | |
34 | ptid.lwp = lwp; | |
35 | ptid.tid = tid; | |
36 | return ptid; | |
37 | } | |
38 | ||
39 | /* Create a ptid from just a pid. */ | |
40 | ||
41 | ptid_t | |
42 | pid_to_ptid (int pid) | |
43 | { | |
44 | return ptid_build (pid, 0, 0); | |
45 | } | |
46 | ||
47 | /* Fetch the pid (process id) component from a ptid. */ | |
48 | ||
49 | int | |
50 | ptid_get_pid (ptid_t ptid) | |
51 | { | |
52 | return ptid.pid; | |
53 | } | |
54 | ||
55 | /* Fetch the lwp (lightweight process) component from a ptid. */ | |
56 | ||
57 | long | |
58 | ptid_get_lwp (ptid_t ptid) | |
59 | { | |
60 | return ptid.lwp; | |
61 | } | |
62 | ||
63 | /* Fetch the tid (thread id) component from a ptid. */ | |
64 | ||
65 | long | |
66 | ptid_get_tid (ptid_t ptid) | |
67 | { | |
68 | return ptid.tid; | |
69 | } | |
70 | ||
71 | /* ptid_equal() is used to test equality of two ptids. */ | |
72 | ||
73 | int | |
74 | ptid_equal (ptid_t ptid1, ptid_t ptid2) | |
75 | { | |
76 | return (ptid1.pid == ptid2.pid | |
77 | && ptid1.lwp == ptid2.lwp | |
78 | && ptid1.tid == ptid2.tid); | |
79 | } | |
80 | ||
81 | /* Returns true if PTID represents a process. */ | |
82 | ||
83 | int | |
84 | ptid_is_pid (ptid_t ptid) | |
85 | { | |
86 | if (ptid_equal (minus_one_ptid, ptid)) | |
87 | return 0; | |
88 | if (ptid_equal (null_ptid, ptid)) | |
89 | return 0; | |
90 | ||
91 | return (ptid_get_lwp (ptid) == 0 && ptid_get_tid (ptid) == 0); | |
92 | } |