2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright 2003 Alexander Kabaev.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #define RTLI_VERSION 0x01
34 #define MAX_RTLD_LOCKS 8
38 unsigned int rtli_version;
39 void *(*lock_create)(void);
40 void (*lock_destroy)(void *);
41 void (*rlock_acquire)(void *);
42 void (*wlock_acquire)(void *);
43 void (*lock_release)(void *);
44 int (*thread_set_flag)(int);
45 int (*thread_clr_flag)(int);
46 void (*at_fork)(void);
49 extern void _rtld_thread_init(struct RtldLockInfo *) __exported;
50 extern void _rtld_atfork_pre(int *) __exported;
51 extern void _rtld_atfork_post(int *) __exported;
56 typedef struct rtld_lock *rtld_lock_t;
58 extern rtld_lock_t rtld_bind_lock;
59 extern rtld_lock_t rtld_libc_lock;
60 extern rtld_lock_t rtld_phdr_lock;
62 #define RTLD_LOCK_UNLOCKED 0
63 #define RTLD_LOCK_RLOCKED 1
64 #define RTLD_LOCK_WLOCKED 2
66 struct Struct_RtldLockState;
67 typedef struct Struct_RtldLockState RtldLockState;
69 void rlock_acquire(rtld_lock_t, RtldLockState *);
70 void wlock_acquire(rtld_lock_t, RtldLockState *);
71 void lock_release(rtld_lock_t, RtldLockState *);
72 void lock_upgrade(rtld_lock_t, RtldLockState *);
73 void lock_restart_for_upgrade(RtldLockState *);