1 /*- 2 * Copyright 2003 Alexander Kabaev. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #ifndef _RTLD_LOCK_H_ 29 #define _RTLD_LOCK_H_ 30 31 #define RTLI_VERSION 0x02 32 #define RTLI_VERSION_FORK 0x02 33 34 struct RtldLockInfo 35 { 36 unsigned int rtli_version; 37 void *(*lock_create)(void); 38 void (*lock_destroy)(void *); 39 void (*rlock_acquire)(void *); 40 void (*wlock_acquire)(void *); 41 void (*lock_release)(void *); 42 int (*thread_set_flag)(int); 43 int (*thread_clr_flag)(int); 44 void (*at_fork)(void *handle); 45 void (*fork_acquire)(void *); 46 void (*fork_release)(void *); 47 }; 48 49 extern void _rtld_thread_init(void *); 50 extern void _rtld_thread_prefork(void); 51 extern void _rtld_thread_postfork(void); 52 extern void _rtld_thread_childfork(void); 53 54 #ifdef IN_RTLD 55 56 struct Struct_Lock; 57 typedef struct Struct_Lock *rtld_lock_t; 58 59 extern rtld_lock_t rtld_bind_lock; 60 extern rtld_lock_t rtld_libc_lock; 61 extern rtld_lock_t rtld_phdr_lock; 62 63 #define RTLD_LOCK_UNLOCKED 0 64 #define RTLD_LOCK_RLOCKED 1 65 #define RTLD_LOCK_WLOCKED 2 66 67 struct Struct_RtldLockState; 68 typedef struct Struct_RtldLockState RtldLockState; 69 70 void rlock_acquire(rtld_lock_t, RtldLockState *); 71 void wlock_acquire(rtld_lock_t, RtldLockState *); 72 void lock_release(rtld_lock_t, RtldLockState *); 73 void lock_upgrade(rtld_lock_t, RtldLockState *); 74 void lock_restart_for_upgrade(RtldLockState *); 75 76 #endif /* IN_RTLD */ 77 78 #endif 79