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fd312537 | 1 | /* GNU Objective C Runtime @synchronized implementation |
818ab71a | 2 | Copyright (C) 2010-2016 Free Software Foundation, Inc. |
fd312537 NP |
3 | Contributed by Nicola Pero <nicola.pero@meta-innovation.com> |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC 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, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GCC 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 | Under Section 7 of GPL version 3, you are granted additional | |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
25 | ||
26 | #ifndef __objc_sync_INCLUDE_GNU | |
27 | #define __objc_sync_INCLUDE_GNU | |
28 | ||
29 | #include "objc.h" | |
805a07f1 | 30 | #include "objc-decls.h" |
fd312537 NP |
31 | |
32 | #ifdef __cplusplus | |
33 | extern "C" { | |
34 | #endif | |
35 | ||
36 | /* These functions are automatically called by @synchronized(). */ | |
37 | ||
38 | /* 'objc_sync_enter' is automatically called when entering a | |
39 | @synchronized() block. It locks the recursive lock associated with | |
40 | 'object'. If 'object' is nil, it does nothing. It returns | |
41 | OBJC_SYNC_SUCCESS on success; see the enumeration below for error | |
42 | values. | |
43 | ||
44 | Note that you should not rely on the behaviour when 'object' is nil | |
805a07f1 NP |
45 | because it could change. */ |
46 | objc_EXPORT int objc_sync_enter (id object); | |
fd312537 NP |
47 | |
48 | /* 'objc_sync_exit' is automatically called when exiting from a | |
49 | @synchronized() block. It unlocks the recursive lock associated | |
50 | with 'object'. If 'object' is nil, it does nothing. It returns | |
51 | OBJC_SYNC_SUCCESS on success; see the enumeration below for error | |
805a07f1 NP |
52 | values. */ |
53 | objc_EXPORT int objc_sync_exit (id object); | |
fd312537 NP |
54 | |
55 | /* All the possible return values for objc_sync_enter() and | |
56 | objc_sync_exit(). | |
57 | */ | |
58 | enum { | |
59 | OBJC_SYNC_SUCCESS = 0, | |
60 | OBJC_SYNC_NOT_OWNING_THREAD_ERROR = -1, | |
61 | OBJC_SYNC_TIMED_OUT = -2, | |
62 | OBJC_SYNC_NOT_INITIALIZED = -3 | |
63 | }; | |
64 | ||
65 | #ifdef __cplusplus | |
66 | } | |
67 | #endif | |
68 | ||
69 | #endif /* not __objc_sync_INCLUDE_GNU */ |