fa55c610fa
Newlib build system defines __SINGLE_THREAD__ to allow concurrency code to be only compiled when newlib is configured for multithread. One such example are locks which become useless in single thread mode. Although most static locks are indeed guarded by !defined(__SINGLE_THREAD__), some are not. This commit adds these missing guards to __dd_hash_mutex, __atexit_recursive_mutex, __at_quick_exit_mutex and __arc4random_mutex. It also makes sure locking macros in lock.h are noop in single thread mode.
92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*-
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* Copyright (c) 2016 embedded brains GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Newlib ports may override the default implementations via the following
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* define and macros
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* o _ARC4RANDOM_DATA,
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* o _ARC4RANDOM_GETENTROPY_FAIL(),
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* o _ARC4RANDOM_ALLOCATE(rsp, rspx), and
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* o _ARC4RANDOM_FORKDETECT().
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*/
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#include <machine/_arc4random.h>
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#include <sys/lock.h>
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#include <signal.h>
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#ifndef _ARC4_LOCK_INIT
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#define _ARC4_LOCK_INIT __LOCK_INIT(static, __arc4random_mutex);
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#define _ARC4_LOCK() __lock_acquire(__arc4random_mutex)
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#define _ARC4_UNLOCK() __lock_release(__arc4random_mutex)
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#endif /* _ARC4_LOCK_INIT */
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#ifndef __SINGLE_THREAD__
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_ARC4_LOCK_INIT
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#endif
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#ifdef _ARC4RANDOM_DATA
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_ARC4RANDOM_DATA
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#else
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static struct {
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struct _rs rs;
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struct _rsx rsx;
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} _arc4random_data;
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#endif
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static inline void
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_getentropy_fail(void)
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{
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#ifdef _ARC4RANDOM_GETENTROPY_FAIL
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_ARC4RANDOM_GETENTROPY_FAIL();
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#else
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raise(SIGKILL);
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#endif
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}
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static inline int
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_rs_allocate(struct _rs **rsp, struct _rsx **rsxp)
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{
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#ifdef _ARC4RANDOM_ALLOCATE
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_ARC4RANDOM_ALLOCATE(rsp, rsxp);
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#else
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*rsp = &_arc4random_data.rs;
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*rsxp = &_arc4random_data.rsx;
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return (0);
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#endif
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}
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static inline void
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_rs_forkdetect(void)
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{
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#ifdef _ARC4RANDOM_FORKDETECT
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_ARC4RANDOM_FORKDETECT();
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#endif
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}
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