1 f1e8706d 2004-12-27 devnull #include "u.h"
  2 f1e8706d 2004-12-27 devnull #include <errno.h>
  3 f1e8706d 2004-12-27 devnull #include <sys/types.h>
  4 f1e8706d 2004-12-27 devnull #include <sys/wait.h>
  5 f1e8706d 2004-12-27 devnull #include <sched.h>
  6 f1e8706d 2004-12-27 devnull #include <signal.h>
  7 f1e8706d 2004-12-27 devnull #include "libc.h"
  8 f1e8706d 2004-12-27 devnull #include "thread.h"
  9 f1e8706d 2004-12-27 devnull #include "threadimpl.h"
 10 f1e8706d 2004-12-27 devnull 
 11 2c87dda8 2004-12-28 devnull int ngetpid;
 12 2c87dda8 2004-12-28 devnull 
 13 2c87dda8 2004-12-28 devnull 
 14 f1e8706d 2004-12-27 devnull /*
 15 f1e8706d 2004-12-27 devnull  * spin locks
 16 f1e8706d 2004-12-27 devnull  */
 17 f1e8706d 2004-12-27 devnull extern int _tas(int*);
 18 f1e8706d 2004-12-27 devnull 
 19 f1e8706d 2004-12-27 devnull void
 20 f1e8706d 2004-12-27 devnull _threadunlock(Lock *l, ulong pc)
 21 f1e8706d 2004-12-27 devnull {
 22 f1e8706d 2004-12-27 devnull 	USED(pc);
 23 f1e8706d 2004-12-27 devnull 
 24 f1e8706d 2004-12-27 devnull 	l->held = 0;
 25 f1e8706d 2004-12-27 devnull }
 26 f1e8706d 2004-12-27 devnull 
 27 f1e8706d 2004-12-27 devnull int
 28 f1e8706d 2004-12-27 devnull _threadlock(Lock *l, int block, ulong pc)
 29 f1e8706d 2004-12-27 devnull {
 30 f1e8706d 2004-12-27 devnull 	int i;
 31 f1e8706d 2004-12-27 devnull 
 32 f1e8706d 2004-12-27 devnull 	USED(pc);
 33 f1e8706d 2004-12-27 devnull 
 34 f1e8706d 2004-12-27 devnull 	/* once fast */
 35 f1e8706d 2004-12-27 devnull 	if(!_tas(&l->held))
 36 f1e8706d 2004-12-27 devnull 		return 1;
 37 f1e8706d 2004-12-27 devnull 	if(!block)
 38 f1e8706d 2004-12-27 devnull 		return 0;
 39 f1e8706d 2004-12-27 devnull 
 40 f1e8706d 2004-12-27 devnull 	/* a thousand times pretty fast */
 41 f1e8706d 2004-12-27 devnull 	for(i=0; i<1000; i++){
 42 f1e8706d 2004-12-27 devnull 		if(!_tas(&l->held))
 43 f1e8706d 2004-12-27 devnull 			return 1;
 44 f1e8706d 2004-12-27 devnull 		sched_yield();
 45 f1e8706d 2004-12-27 devnull 	}
 46 f1e8706d 2004-12-27 devnull 	/* now nice and slow */
 47 f1e8706d 2004-12-27 devnull 	for(i=0; i<1000; i++){
 48 f1e8706d 2004-12-27 devnull 		if(!_tas(&l->held))
 49 f1e8706d 2004-12-27 devnull 			return 1;
 50 f1e8706d 2004-12-27 devnull 		usleep(100*1000);
 51 f1e8706d 2004-12-27 devnull 	}
 52 f1e8706d 2004-12-27 devnull 	/* take your time */
 53 f1e8706d 2004-12-27 devnull 	while(_tas(&l->held))
 54 f1e8706d 2004-12-27 devnull 		usleep(1000*1000);
 55 f1e8706d 2004-12-27 devnull 	return 1;
 56 f1e8706d 2004-12-27 devnull }
 57 f1e8706d 2004-12-27 devnull 
 58 f1e8706d 2004-12-27 devnull /*
 59 f1e8706d 2004-12-27 devnull  * sleep and wakeup
 60 f1e8706d 2004-12-27 devnull  */
 61 f1e8706d 2004-12-27 devnull static void
 62 f1e8706d 2004-12-27 devnull ign(int x)
 63 f1e8706d 2004-12-27 devnull {
 64 f1e8706d 2004-12-27 devnull 	USED(x);
 65 f1e8706d 2004-12-27 devnull }
 66 f1e8706d 2004-12-27 devnull 
 67 f1e8706d 2004-12-27 devnull static void /*__attribute__((constructor))*/
 68 f1e8706d 2004-12-27 devnull ignusr1(int restart)
 69 f1e8706d 2004-12-27 devnull {
 70 f1e8706d 2004-12-27 devnull 	struct sigaction sa;
 71 f1e8706d 2004-12-27 devnull 
 72 f1e8706d 2004-12-27 devnull 	memset(&sa, 0, sizeof sa);
 73 f1e8706d 2004-12-27 devnull 	sa.sa_handler = ign;
 74 f1e8706d 2004-12-27 devnull 	sigemptyset(&sa.sa_mask);
 75 f1e8706d 2004-12-27 devnull 	sigaddset(&sa.sa_mask, SIGUSR1);
 76 f1e8706d 2004-12-27 devnull 	if(restart)
 77 f1e8706d 2004-12-27 devnull 		sa.sa_flags = SA_RESTART;
 78 f1e8706d 2004-12-27 devnull 	sigaction(SIGUSR1, &sa, nil);
 79 f1e8706d 2004-12-27 devnull }
 80 f1e8706d 2004-12-27 devnull 
 81 f1e8706d 2004-12-27 devnull void
 82 f1e8706d 2004-12-27 devnull _procsleep(_Procrendez *r)
 83 f1e8706d 2004-12-27 devnull {
 84 f1e8706d 2004-12-27 devnull 	sigset_t mask;
 85 f1e8706d 2004-12-27 devnull 
 86 f1e8706d 2004-12-27 devnull 	/*
 87 f1e8706d 2004-12-27 devnull 	 * Go to sleep.
 88 f1e8706d 2004-12-27 devnull 	 *
 89 f1e8706d 2004-12-27 devnull 	 * Block USR1, set the handler to interrupt system calls,
 90 f1e8706d 2004-12-27 devnull 	 * unlock the vouslock so our waker can wake us,
 91 f1e8706d 2004-12-27 devnull 	 * and then suspend.
 92 f1e8706d 2004-12-27 devnull 	 */
 93 955a2ca7 2004-12-27 devnull again:
 94 f1e8706d 2004-12-27 devnull 	r->asleep = 1;
 95 f1e8706d 2004-12-27 devnull 	r->pid = getpid();
 96 f1e8706d 2004-12-27 devnull 
 97 f1e8706d 2004-12-27 devnull 	sigprocmask(SIG_SETMASK, nil, &mask);
 98 f1e8706d 2004-12-27 devnull 	sigaddset(&mask, SIGUSR1);
 99 f1e8706d 2004-12-27 devnull 	sigprocmask(SIG_SETMASK, &mask, nil);
100 f1e8706d 2004-12-27 devnull 	ignusr1(0);
101 f1e8706d 2004-12-27 devnull 	unlock(r->l);
102 f1e8706d 2004-12-27 devnull 	sigdelset(&mask, SIGUSR1);
103 f1e8706d 2004-12-27 devnull 	sigsuspend(&mask);
104 f1e8706d 2004-12-27 devnull 
105 f1e8706d 2004-12-27 devnull 	/*
106 f1e8706d 2004-12-27 devnull 	 * We're awake.  Make USR1 not interrupt system calls.
107 f1e8706d 2004-12-27 devnull 	 */
108 f1e8706d 2004-12-27 devnull 	lock(r->l);
109 955a2ca7 2004-12-27 devnull 	ignusr1(1);
110 955a2ca7 2004-12-27 devnull 	if(r->asleep && r->pid == getpid()){
111 955a2ca7 2004-12-27 devnull 		/* Didn't really wake up - signal from something else */
112 955a2ca7 2004-12-27 devnull 		goto again;
113 955a2ca7 2004-12-27 devnull 	}
114 f1e8706d 2004-12-27 devnull }
115 f1e8706d 2004-12-27 devnull 
116 f1e8706d 2004-12-27 devnull void
117 f1e8706d 2004-12-27 devnull _procwakeup(_Procrendez *r)
118 f1e8706d 2004-12-27 devnull {
119 f1e8706d 2004-12-27 devnull 	if(r->asleep){
120 f1e8706d 2004-12-27 devnull 		r->asleep = 0;
121 f1e8706d 2004-12-27 devnull 		assert(r->pid >= 1);
122 f1e8706d 2004-12-27 devnull 		kill(r->pid, SIGUSR1);
123 f1e8706d 2004-12-27 devnull 	}
124 f1e8706d 2004-12-27 devnull }
125 f1e8706d 2004-12-27 devnull 
126 f1e8706d 2004-12-27 devnull /*
127 f1e8706d 2004-12-27 devnull  * process creation and exit
128 f1e8706d 2004-12-27 devnull  */
129 f1e8706d 2004-12-27 devnull typedef struct Stackfree Stackfree;
130 f1e8706d 2004-12-27 devnull struct Stackfree
131 f1e8706d 2004-12-27 devnull {
132 f1e8706d 2004-12-27 devnull 	Stackfree	*next;
133 f1e8706d 2004-12-27 devnull 	int	pid;
134 f1e8706d 2004-12-27 devnull };
135 f1e8706d 2004-12-27 devnull static Lock stacklock;
136 f1e8706d 2004-12-27 devnull static Stackfree *stackfree;
137 f1e8706d 2004-12-27 devnull 
138 f1e8706d 2004-12-27 devnull static void
139 f1e8706d 2004-12-27 devnull delayfreestack(uchar *stk)
140 f1e8706d 2004-12-27 devnull {
141 f1e8706d 2004-12-27 devnull 	Stackfree *sf;
142 f1e8706d 2004-12-27 devnull 
143 f1e8706d 2004-12-27 devnull 	sf = (Stackfree*)stk;
144 f1e8706d 2004-12-27 devnull 	sf->pid = getpid();
145 f1e8706d 2004-12-27 devnull 	lock(&stacklock);
146 f1e8706d 2004-12-27 devnull 	sf->next = stackfree;
147 f1e8706d 2004-12-27 devnull 	stackfree = sf;
148 f1e8706d 2004-12-27 devnull 	unlock(&stacklock);
149 f1e8706d 2004-12-27 devnull }
150 f1e8706d 2004-12-27 devnull 
151 f1e8706d 2004-12-27 devnull static void
152 f1e8706d 2004-12-27 devnull dofreestacks(void)
153 f1e8706d 2004-12-27 devnull {
154 f1e8706d 2004-12-27 devnull 	Stackfree *sf, *last, *next;
155 f1e8706d 2004-12-27 devnull 
156 f1e8706d 2004-12-27 devnull 	if(stackfree==nil || !canlock(&stacklock))
157 f1e8706d 2004-12-27 devnull 		return;
158 f1e8706d 2004-12-27 devnull 
159 f1e8706d 2004-12-27 devnull 	for(last=nil,sf=stackfree; sf; last=sf,sf=next){
160 f1e8706d 2004-12-27 devnull 		next = sf->next;
161 f1e8706d 2004-12-27 devnull 		if(sf->pid >= 1 && kill(sf->pid, 0) < 0 && errno == ESRCH){
162 f1e8706d 2004-12-27 devnull 			free(sf);
163 2c87dda8 2004-12-28 devnull 			if(last)
164 2c87dda8 2004-12-28 devnull 				last->next = next;
165 2c87dda8 2004-12-28 devnull 			else
166 2c87dda8 2004-12-28 devnull 				stackfree = next;
167 f1e8706d 2004-12-27 devnull 			sf = last;
168 f1e8706d 2004-12-27 devnull 		}
169 f1e8706d 2004-12-27 devnull 	}
170 2c87dda8 2004-12-28 devnull 	unlock(&stacklock);
171 2c87dda8 2004-12-28 devnull }
172 f1e8706d 2004-12-27 devnull 
173 f1e8706d 2004-12-27 devnull static int
174 f1e8706d 2004-12-27 devnull startprocfn(void *v)
175 f1e8706d 2004-12-27 devnull {
176 f1e8706d 2004-12-27 devnull 	void **a;
177 f1e8706d 2004-12-27 devnull 	uchar *stk;
178 f1e8706d 2004-12-27 devnull 	void (*fn)(void*);
179 f1e8706d 2004-12-27 devnull 	Proc *p;
180 f1e8706d 2004-12-27 devnull 
181 f1e8706d 2004-12-27 devnull 	a = (void**)v;
182 f1e8706d 2004-12-27 devnull 	fn = a[0];
183 f1e8706d 2004-12-27 devnull 	p = a[1];
184 f1e8706d 2004-12-27 devnull 	stk = a[2];
185 f1e8706d 2004-12-27 devnull 	free(a);
186 f1e8706d 2004-12-27 devnull 	p->osprocid = getpid();
187 f1e8706d 2004-12-27 devnull 
188 f1e8706d 2004-12-27 devnull 	(*fn)(p);
189 f1e8706d 2004-12-27 devnull 
190 f1e8706d 2004-12-27 devnull 	delayfreestack(stk);
191 f1e8706d 2004-12-27 devnull 	_exit(0);
192 f1e8706d 2004-12-27 devnull 	return 0;
193 f1e8706d 2004-12-27 devnull }
194 f1e8706d 2004-12-27 devnull 
195 f1e8706d 2004-12-27 devnull /*
196 f1e8706d 2004-12-27 devnull  * indirect through here so that parent need not wait for child zombie
197 f1e8706d 2004-12-27 devnull  * 
198 f1e8706d 2004-12-27 devnull  * slight race - if child exits and then another process starts before we 
199 f1e8706d 2004-12-27 devnull  * manage to exit, we'll be running on a freed stack.
200 f1e8706d 2004-12-27 devnull  */
201 f1e8706d 2004-12-27 devnull static int
202 f1e8706d 2004-12-27 devnull trampnowait(void *v)
203 f1e8706d 2004-12-27 devnull {
204 f1e8706d 2004-12-27 devnull 	void **a;
205 f1e8706d 2004-12-27 devnull 
206 f1e8706d 2004-12-27 devnull 	a = (void*)v;
207 f1e8706d 2004-12-27 devnull 	*(int*)a[3] = clone(startprocfn, a[2]+65536-512, CLONE_VM|CLONE_FILES, a);
208 f1e8706d 2004-12-27 devnull 	_exit(0);
209 f1e8706d 2004-12-27 devnull 	return 0;
210 f1e8706d 2004-12-27 devnull }
211 f1e8706d 2004-12-27 devnull 
212 f1e8706d 2004-12-27 devnull void
213 f1e8706d 2004-12-27 devnull _procstart(Proc *p, void (*fn)(Proc*))
214 f1e8706d 2004-12-27 devnull {
215 f1e8706d 2004-12-27 devnull 	void **a;
216 f1e8706d 2004-12-27 devnull 	uchar *stk;
217 f1e8706d 2004-12-27 devnull 	int pid, kidpid, status;
218 f1e8706d 2004-12-27 devnull 
219 f1e8706d 2004-12-27 devnull 	dofreestacks();
220 f1e8706d 2004-12-27 devnull 	a = malloc(4*sizeof a[0]);
221 f1e8706d 2004-12-27 devnull 	if(a == nil)
222 f1e8706d 2004-12-27 devnull 		sysfatal("_procstart malloc: %r");
223 f1e8706d 2004-12-27 devnull 	stk = malloc(65536);
224 f1e8706d 2004-12-27 devnull 	if(stk == nil)
225 f1e8706d 2004-12-27 devnull 		sysfatal("_procstart malloc stack: %r");
226 f1e8706d 2004-12-27 devnull 
227 f1e8706d 2004-12-27 devnull 	a[0] = fn;
228 f1e8706d 2004-12-27 devnull 	a[1] = p;
229 f1e8706d 2004-12-27 devnull 	a[2] = stk;
230 f1e8706d 2004-12-27 devnull 	a[3] = &kidpid;
231 f1e8706d 2004-12-27 devnull 	kidpid = -1;
232 f1e8706d 2004-12-27 devnull 
233 f1e8706d 2004-12-27 devnull 	pid = clone(trampnowait, stk+65536-16, CLONE_VM|CLONE_FILES, a);
234 f1e8706d 2004-12-27 devnull 	if(pid > 0)
235 f1e8706d 2004-12-27 devnull 		if(wait4(pid, &status, __WALL, 0) < 0)
236 f1e8706d 2004-12-27 devnull 			fprint(2, "ffork wait4: %r\n");
237 f1e8706d 2004-12-27 devnull 	if(pid < 0 || kidpid < 0){
238 f1e8706d 2004-12-27 devnull 		fprint(2, "_procstart clone: %r\n");
239 f1e8706d 2004-12-27 devnull 		abort();
240 f1e8706d 2004-12-27 devnull 	}
241 f1e8706d 2004-12-27 devnull }
242 f1e8706d 2004-12-27 devnull 
243 f1e8706d 2004-12-27 devnull static char *threadexitsmsg;
244 f1e8706d 2004-12-27 devnull void
245 f1e8706d 2004-12-27 devnull sigusr2handler(int s)
246 f1e8706d 2004-12-27 devnull {
247 2c87dda8 2004-12-28 devnull /*	fprint(2, "%d usr2 %d\n", time(0), getpid()); */
248 f1e8706d 2004-12-27 devnull 	if(threadexitsmsg)
249 f1e8706d 2004-12-27 devnull 		_exits(threadexitsmsg);
250 f1e8706d 2004-12-27 devnull }
251 f1e8706d 2004-12-27 devnull 
252 f1e8706d 2004-12-27 devnull void
253 f1e8706d 2004-12-27 devnull threadexitsall(char *msg)
254 f1e8706d 2004-12-27 devnull {
255 f1e8706d 2004-12-27 devnull 	static int pid[1024];
256 f1e8706d 2004-12-27 devnull 	int i, npid, mypid;
257 f1e8706d 2004-12-27 devnull 	Proc *p;
258 f1e8706d 2004-12-27 devnull 
259 f1e8706d 2004-12-27 devnull 	if(msg == nil)
260 f1e8706d 2004-12-27 devnull 		msg = "";
261 f1e8706d 2004-12-27 devnull 	mypid = getpid();
262 f1e8706d 2004-12-27 devnull 	lock(&_threadprocslock);
263 f1e8706d 2004-12-27 devnull 	threadexitsmsg = msg;
264 f1e8706d 2004-12-27 devnull 	npid = 0;
265 f1e8706d 2004-12-27 devnull 	for(p=_threadprocs; p; p=p->next)
266 f1e8706d 2004-12-27 devnull 		if(p->osprocid != mypid && p->osprocid >= 1)
267 f1e8706d 2004-12-27 devnull 			pid[npid++] = p->osprocid;
268 f1e8706d 2004-12-27 devnull 	for(i=0; i<npid; i++)
269 f1e8706d 2004-12-27 devnull 		kill(pid[i], SIGUSR2);
270 f1e8706d 2004-12-27 devnull 	unlock(&_threadprocslock);
271 f1e8706d 2004-12-27 devnull 	exits(msg);
272 f1e8706d 2004-12-27 devnull }
273 f1e8706d 2004-12-27 devnull 
274 f1e8706d 2004-12-27 devnull /*
275 f1e8706d 2004-12-27 devnull  * per-process data, indexed by pid
276 f1e8706d 2004-12-27 devnull  *
277 f1e8706d 2004-12-27 devnull  * could use modify_ldt and a segment register
278 f1e8706d 2004-12-27 devnull  * to avoid the many calls to getpid(), but i don't
279 f1e8706d 2004-12-27 devnull  * care -- this is compatibility code.  linux 2.6 with
280 f1e8706d 2004-12-27 devnull  * nptl is a good enough pthreads to avoid this whole file.
281 f1e8706d 2004-12-27 devnull  */
282 f1e8706d 2004-12-27 devnull typedef struct Perproc Perproc;
283 f1e8706d 2004-12-27 devnull struct Perproc
284 f1e8706d 2004-12-27 devnull {
285 f1e8706d 2004-12-27 devnull 	int		pid;
286 f1e8706d 2004-12-27 devnull 	Proc	*proc;
287 f1e8706d 2004-12-27 devnull };
288 f1e8706d 2004-12-27 devnull 
289 f1e8706d 2004-12-27 devnull static Lock perlock;
290 f1e8706d 2004-12-27 devnull static Perproc perproc[1024];
291 f1e8706d 2004-12-27 devnull #define P ((Proc*)-1)
292 f1e8706d 2004-12-27 devnull 
293 f1e8706d 2004-12-27 devnull static Perproc*
294 f1e8706d 2004-12-27 devnull myperproc(void)
295 f1e8706d 2004-12-27 devnull {
296 f1e8706d 2004-12-27 devnull 	int i, pid, h;
297 f1e8706d 2004-12-27 devnull 	Perproc *p;
298 f1e8706d 2004-12-27 devnull 
299 f1e8706d 2004-12-27 devnull 	pid = getpid();
300 f1e8706d 2004-12-27 devnull 	h = pid%nelem(perproc);
301 f1e8706d 2004-12-27 devnull 	for(i=0; i<nelem(perproc); i++){
302 f1e8706d 2004-12-27 devnull 		p = &perproc[(i+h)%nelem(perproc)];
303 f1e8706d 2004-12-27 devnull 		if(p->pid == pid)
304 f1e8706d 2004-12-27 devnull 			return p;
305 f1e8706d 2004-12-27 devnull 		if(p->pid == 0){
306 f1e8706d 2004-12-27 devnull 			print("found 0 at %d (h=%d)\n", (i+h)%nelem(perproc), h);
307 f1e8706d 2004-12-27 devnull 			break;
308 f1e8706d 2004-12-27 devnull 		}
309 f1e8706d 2004-12-27 devnull 	}
310 f1e8706d 2004-12-27 devnull 	fprint(2, "myperproc %d: cannot find self\n", pid);
311 f1e8706d 2004-12-27 devnull 	abort();
312 f1e8706d 2004-12-27 devnull 	return nil;
313 f1e8706d 2004-12-27 devnull }
314 f1e8706d 2004-12-27 devnull 
315 f1e8706d 2004-12-27 devnull static Perproc*
316 f1e8706d 2004-12-27 devnull newperproc(void)
317 f1e8706d 2004-12-27 devnull {
318 f1e8706d 2004-12-27 devnull 	int i, pid, h;
319 f1e8706d 2004-12-27 devnull 	Perproc *p;
320 f1e8706d 2004-12-27 devnull 
321 f1e8706d 2004-12-27 devnull 	lock(&perlock);
322 f1e8706d 2004-12-27 devnull 	pid = getpid();
323 f1e8706d 2004-12-27 devnull 	h = pid%nelem(perproc);
324 f1e8706d 2004-12-27 devnull 	for(i=0; i<nelem(perproc); i++){
325 f1e8706d 2004-12-27 devnull 		p = &perproc[(i+h)%nelem(perproc)];
326 f1e8706d 2004-12-27 devnull 		if(p->pid == pid || p->pid == -1 || p->pid == 0){
327 f1e8706d 2004-12-27 devnull 			p->pid = pid;
328 f1e8706d 2004-12-27 devnull 			unlock(&perlock);
329 f1e8706d 2004-12-27 devnull 			return p;
330 f1e8706d 2004-12-27 devnull 		}
331 f1e8706d 2004-12-27 devnull 	}
332 f1e8706d 2004-12-27 devnull 	fprint(2, "newperproc %d: out of procs\n", pid);
333 f1e8706d 2004-12-27 devnull 	abort();
334 f1e8706d 2004-12-27 devnull 	return nil;
335 f1e8706d 2004-12-27 devnull }
336 f1e8706d 2004-12-27 devnull 
337 f1e8706d 2004-12-27 devnull Proc*
338 f1e8706d 2004-12-27 devnull _threadproc(void)
339 f1e8706d 2004-12-27 devnull {
340 f1e8706d 2004-12-27 devnull 	return myperproc()->proc;
341 f1e8706d 2004-12-27 devnull }
342 f1e8706d 2004-12-27 devnull 
343 f1e8706d 2004-12-27 devnull void
344 f1e8706d 2004-12-27 devnull _threadsetproc(Proc *p)
345 f1e8706d 2004-12-27 devnull {
346 f1e8706d 2004-12-27 devnull 	Perproc *pp;
347 f1e8706d 2004-12-27 devnull 
348 2c87dda8 2004-12-28 devnull 	if(p)
349 2c87dda8 2004-12-28 devnull 		p->osprocid = getpid();
350 f1e8706d 2004-12-27 devnull 	pp = newperproc();
351 f1e8706d 2004-12-27 devnull 	pp->proc = p;
352 f1e8706d 2004-12-27 devnull 	if(p == nil)
353 f1e8706d 2004-12-27 devnull 		pp->pid = -1;
354 f1e8706d 2004-12-27 devnull }
355 f1e8706d 2004-12-27 devnull 
356 f1e8706d 2004-12-27 devnull void
357 f1e8706d 2004-12-27 devnull _pthreadinit(void)
358 f1e8706d 2004-12-27 devnull {
359 f1e8706d 2004-12-27 devnull 	signal(SIGUSR2, sigusr2handler);
360 f1e8706d 2004-12-27 devnull }
361 f1e8706d 2004-12-27 devnull