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899905f6 | 1 | /* Threads compatibility routines for libgcc2. */ |
f24af81b | 2 | /* Compile this one with gcc. */ |
3e2a2957 | 3 | /* Copyright (C) 1997, 1998 Free Software Foundation, Inc. |
f24af81b TT |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC 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 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC 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 GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* As a special exception, if you link this library with other files, | |
23 | some of which are compiled with GCC, to produce an executable, | |
24 | this library does not by itself cause the resulting executable | |
25 | to be covered by the GNU General Public License. | |
26 | This exception does not however invalidate any other reasons why | |
27 | the executable file might be covered by the GNU General Public License. */ | |
28 | ||
29 | #ifndef __gthr_h | |
30 | #define __gthr_h | |
31 | ||
32 | /* If this file is compiled with threads support, it must | |
33 | #define __GTHREADS 1 | |
34 | to indicate that threads support is present. Also it has define | |
35 | function | |
36 | int __gthread_active_p () | |
37 | that returns 1 if thread system is active, 0 if not. | |
38 | ||
39 | The threads interface must define the following types: | |
40 | __gthread_key_t | |
41 | __gthread_once_t | |
42 | __gthread_mutex_t | |
43 | ||
44 | The threads interface must define the following macros: | |
45 | ||
46 | __GTHREAD_ONCE_INIT | |
47 | to initialize __gthread_once_t | |
48 | __GTHREAD_MUTEX_INIT | |
49 | to initialize __gthread_mutex_t to get a fast | |
50 | non-recursive mutex. | |
3e2a2957 TT |
51 | __GTHREAD_MUTEX_INIT_FUNCTION |
52 | some systems can't initalize a mutex without a | |
53 | function call. On such systems, define this to a | |
54 | function which looks like this: | |
55 | void __GTHREAD_MUTEX_INIT_FUNCTION (__gthread_mutex_t *) | |
56 | Don't define __GTHREAD_MUTEX_INIT in this case | |
f24af81b TT |
57 | |
58 | The threads interface must define the following static functions: | |
59 | ||
60 | int __gthread_once (__gthread_once_t *once, void (*func) ()) | |
61 | ||
62 | int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *)) | |
63 | int __gthread_key_delete (__gthread_key_t key) | |
64 | ||
65 | int __gthread_key_dtor (__gthread_key_t key, void *ptr) | |
66 | ||
67 | void *__gthread_getspecific (__gthread_key_t key) | |
68 | int __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
69 | ||
70 | int __gthread_mutex_lock (__gthread_mutex_t *mutex); | |
71 | int __gthread_mutex_trylock (__gthread_mutex_t *mutex); | |
72 | int __gthread_mutex_unlock (__gthread_mutex_t *mutex); | |
73 | ||
754d1a92 TT |
74 | All functions returning int should return zero on success or the error |
75 | number. If the operation is not supported, -1 is returned. | |
f24af81b TT |
76 | |
77 | Currently supported threads packages are | |
78 | POSIX threads with -D_PTHREADS | |
79 | DCE threads with -D_DCE_THREADS | |
80 | Solaris/UI threads with -D_SOLARIS_THREADS | |
81 | */ | |
82 | ||
83 | /* Check first for thread specific defines. */ | |
84 | #if _PTHREADS | |
85 | #include "gthr-posix.h" | |
86 | #elif _DCE_THREADS | |
87 | #include "gthr-dce.h" | |
88 | #elif _SOLARIS_THREADS | |
89 | #include "gthr-solaris.h" | |
90 | ||
91 | /* Include GTHREAD_FILE if one is defined. */ | |
7cc34889 MS |
92 | #elif defined(HAVE_GTHR_DEFAULT) |
93 | #if SUPPORTS_WEAK | |
f24af81b TT |
94 | #ifndef GTHREAD_USE_WEAK |
95 | #define GTHREAD_USE_WEAK 1 | |
96 | #endif | |
7cc34889 | 97 | #endif |
f24af81b TT |
98 | #include "gthr-default.h" |
99 | ||
100 | /* Fallback to single thread definitions. */ | |
101 | #else | |
102 | #include "gthr-single.h" | |
103 | #endif | |
104 | ||
105 | #endif /* not __gthr_h */ |