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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 | 4 | |
1322177d | 5 | This file is part of GCC. |
f24af81b | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
f24af81b | 11 | |
1322177d LB |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
f24af81b TT |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
f24af81b TT |
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 | ||
88657302 RH |
29 | #ifndef GCC_GTHR_H |
30 | #define GCC_GTHR_H | |
f24af81b TT |
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 | |
589005ff | 35 | function |
f24af81b TT |
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 | 51 | __GTHREAD_MUTEX_INIT_FUNCTION |
f63d1bf7 | 52 | some systems can't initialize a mutex without a |
3e2a2957 TT |
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 | ||
f24af81b TT |
65 | void *__gthread_getspecific (__gthread_key_t key) |
66 | int __gthread_setspecific (__gthread_key_t key, const void *ptr) | |
67 | ||
68 | int __gthread_mutex_lock (__gthread_mutex_t *mutex); | |
69 | int __gthread_mutex_trylock (__gthread_mutex_t *mutex); | |
70 | int __gthread_mutex_unlock (__gthread_mutex_t *mutex); | |
71 | ||
754d1a92 TT |
72 | All functions returning int should return zero on success or the error |
73 | number. If the operation is not supported, -1 is returned. | |
f24af81b TT |
74 | |
75 | Currently supported threads packages are | |
76 | POSIX threads with -D_PTHREADS | |
77 | DCE threads with -D_DCE_THREADS | |
78 | Solaris/UI threads with -D_SOLARIS_THREADS | |
79 | */ | |
80 | ||
19eb1ad7 | 81 | /* Check first for thread specific defines. */ |
f24af81b TT |
82 | #if _PTHREADS |
83 | #include "gthr-posix.h" | |
84 | #elif _DCE_THREADS | |
85 | #include "gthr-dce.h" | |
86 | #elif _SOLARIS_THREADS | |
87 | #include "gthr-solaris.h" | |
88 | ||
19eb1ad7 | 89 | /* Include GTHREAD_FILE if one is defined. */ |
7cc34889 MS |
90 | #elif defined(HAVE_GTHR_DEFAULT) |
91 | #if SUPPORTS_WEAK | |
f24af81b TT |
92 | #ifndef GTHREAD_USE_WEAK |
93 | #define GTHREAD_USE_WEAK 1 | |
94 | #endif | |
7cc34889 | 95 | #endif |
f24af81b TT |
96 | #include "gthr-default.h" |
97 | ||
19eb1ad7 | 98 | /* Fallback to single thread definitions. */ |
f24af81b TT |
99 | #else |
100 | #include "gthr-single.h" | |
101 | #endif | |
102 | ||
88657302 | 103 | #endif /* ! GCC_GTHR_H */ |