build - Add build-all and install-all targets
[dragonfly.git] / lib / libc / gen / _thread_init.c
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1/*
2 * Copyright (c) 2001 Daniel Eischen <deischen@FreeBSD.org>
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. Neither the name of the author nor the names of any co-contributors
11 * may be used to endorse or promote products derived from this software
12 * without specific prior written permission.
13 *
14 * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS''
15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
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26 */
27
f8406b33 28#include <sys/cdefs.h>
17ea2221 29#include <sys/types.h>
721505de 30#include "libc_private.h"
17ea2221 31
434dae9b 32void _thread_init_stub(void);
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33void _nmalloc_thr_init(void);
34void _upmap_thr_init(void);
434dae9b 35
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36int _thread_autoinit_dummy_decl_stub = 0;
37
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38/*
39 * This stub is overridden when libpthreads is linked in. However,
40 * we can apply the constructor to the weak reference. Instead the
41 * constructor is applied to the stub and we do a run-time check to
42 * see if the stub has been overridden by pthreads.
43 */
44void _thread_init_stub(void) __attribute__ ((constructor));
45__weak_reference(_thread_init_stub, _thread_init);
46
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47void
48_thread_init_stub(void)
49{
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50 /*
51 * Only run libc related pthreads initialization from here
52 * if pthreads did not override the weak reference. Otherwise
53 * pthreads will do it after setting up a real thread context.
54 */
55 if (_thread_init == _thread_init_stub) {
56 _libc_thr_init();
57 }
58}
59
60/*
61 * Pre-initialization prior to thread startup to avoid certain
62 * chicken-and-egg issues with low-level allocations.
63 */
64void
65_libc_thr_init(void)
66{
67 _nmalloc_thr_init();
68 _upmap_thr_init();
17ea2221 69}
f8406b33 70
f8406b33 71__weak_reference(_thread_autoinit_dummy_decl_stub, _thread_autoinit_dummy_decl);