1 /*
2  * Copyright (c) 2005 David Xu <davidxu@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 unmodified, this list of conditions, and the following
10  *    disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  *
26  * $DragonFly: src/lib/libthread_xu/thread/thr_kern.c,v 1.1 2005/02/01 12:38:27 davidxu Exp $
27  */
28 
29 #include <sys/cdefs.h>
30 #include <sys/types.h>
31 #include <sys/signalvar.h>
32 #include <pthread.h>
33 #include "thr_private.h"
34 
35 /*#define DEBUG_THREAD_KERN */
36 #ifdef DEBUG_THREAD_KERN
37 #define DBG_MSG		stdout_debug
38 #else
39 #define DBG_MSG(x...)
40 #endif
41 
42 /*
43  * This is called when the first thread (other than the initial
44  * thread) is created.
45  */
46 int
47 _thr_setthreaded(int threaded)
48 {
49 	if (((threaded == 0) ^ (__isthreaded == 0)) == 0)
50 		return (0);
51 
52 	__isthreaded = threaded;
53 #if 0
54 	if (threaded != 0) {
55 		_thr_rtld_init();
56 	} else {
57 		_thr_rtld_fini();
58 	}
59 #endif
60 	return (0);
61 }
62 
63 void
64 _thr_signal_block(struct pthread *curthread)
65 {
66 	sigset_t set;
67 
68 	if (curthread->sigblock > 0) {
69 		curthread->sigblock++;
70 		return;
71 	}
72 	SIGFILLSET(set);
73 	SIGDELSET(set, SIGBUS);
74 	SIGDELSET(set, SIGILL);
75 	SIGDELSET(set, SIGFPE);
76 	SIGDELSET(set, SIGSEGV);
77 	SIGDELSET(set, SIGTRAP);
78 	__sys_sigprocmask(SIG_BLOCK, &set, &curthread->sigmask);
79 	curthread->sigblock++;
80 }
81 
82 void
83 _thr_signal_unblock(struct pthread *curthread)
84 {
85 	if (--curthread->sigblock == 0)
86 		__sys_sigprocmask(SIG_SETMASK, &curthread->sigmask, NULL);
87 }
88 
89 void
90 _thr_assert_lock_level()
91 {
92 	PANIC("locklevel <= 0");
93 }
94 
95 int
96 _thr_send_sig(struct pthread *thread, int sig)
97 {
98 	return (kill(thread->tid, sig));
99 }
100 
101 int
102 _thr_get_tid()
103 {
104 	return (getpid());
105 }
106