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author | kan <kan@FreeBSD.org> | 2003-05-29 22:58:26 +0000 |
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committer | kan <kan@FreeBSD.org> | 2003-05-29 22:58:26 +0000 |
commit | 949c40c5fd683b40f39ebfa2783d06b8226148ab (patch) | |
tree | b9989a6b77c2c503eafdb3cf6bf13370f5c6396b /libexec/rtld-elf/rtld_lock.h | |
parent | b292a2679ee1e9385409c38e0e898f0c2f4cb41c (diff) | |
download | FreeBSD-src-949c40c5fd683b40f39ebfa2783d06b8226148ab.zip FreeBSD-src-949c40c5fd683b40f39ebfa2783d06b8226148ab.tar.gz |
Allow threading libraries to register their own locking
implementation in case default one provided by rtld is
not suitable.
Consolidate various identical MD lock implementation into
a single file using appropriate machine/atomic.h.
Approved by: re (scottl)
Diffstat (limited to 'libexec/rtld-elf/rtld_lock.h')
-rw-r--r-- | libexec/rtld-elf/rtld_lock.h | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/libexec/rtld-elf/rtld_lock.h b/libexec/rtld-elf/rtld_lock.h new file mode 100644 index 0000000..941b19e --- /dev/null +++ b/libexec/rtld-elf/rtld_lock.h @@ -0,0 +1,63 @@ +/*- + * Copyright 2003 Alexander Kabaev. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _RTLD_LOCK_H_ +#define _RTLD_LOCK_H_ + +#define RTLI_VERSION 0x01 + +struct RtldLockInfo +{ + unsigned int rtli_version; + void *(*lock_create)(); + void (*lock_destroy)(void *); + void (*rlock_acquire)(void *); + void (*wlock_acquire)(void *); + void (*lock_release)(void *); + int (*thread_set_flag)(int); + int (*thread_clr_flag)(int); + void (*at_fork)(); +}; + +extern void _rtld_thread_init(struct RtldLockInfo *); + +#ifdef IN_RTLD + +struct rtld_lock; +typedef struct rtld_lock *rtld_lock_t; + +extern rtld_lock_t rtld_bind_lock; +extern rtld_lock_t rtld_libc_lock; + +int rlock_acquire(rtld_lock_t); +int wlock_acquire(rtld_lock_t); +void rlock_release(rtld_lock_t, int); +void wlock_release(rtld_lock_t, int); + +#endif /* IN_RTLD */ + +#endif |