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Last change on this file since 600478d was ff443e5, checked in by Peter A. Buhr <pabuhr@…>, 3 years ago
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1	//
2	// Cforall Version 1.0.0 Copyright (C) 2019 University of Waterloo
3	//
4	// The contents of this file are covered under the licence agreement in the
5	// file "LICENCE" distributed with Cforall.
6	//
7	// pthread.cfa --
8	//
9	// Author : Zhenyan Zhu
10	// Created On : Sat Aug 6 16:29:18 2022
11	// Last Modified By :
12	// Last Modified On :
13	// Update Count :
14	//
15
16	#define __cforall_thread__
17
18	#include <signal.h>
19	#include <pthread.h>
20	#include <errno.h>
21	#include "locks.hfa"
22	#include "bits/stack.hfa"
23
24
25	#define check_nonnull(x) asm("": "+rm"(x)); if( x == 0p ) return EINVAL;
26
27	/* pthread key, pthread once inner routine mutual exclusion */
28	static simple_owner_lock once_lock,key_lock,magic_mutex_check, concurrency_lock;
29
30	//######################### Local Storage Helpers #########################
31
32	enum { PTHREAD_KEYS_MAX = 1024 };
33
34	struct pthread_values{
35	inline Seqable;
36	void * value;
37	bool in_use;
38	};
39
40	static inline {
41	pthread_values & Back( pthread_values n ) {
42	return (pthread_values )Back( (Seqable )n );
43	}
44
45	pthread_values & Next( pthread_values n ) {
46	return (pthread_values )Next( (Colable )n );
47	}
48	}
49
50	struct pthread_keys {
51	bool in_use;
52	void (* destructor)( void * );
53	Sequence(pthread_values) threads;
54	};
55
56	static void ?{}(pthread_keys& k) {
57	k.threads{};
58	}
59
60	// Create storage separately to ensure no constructors are called.
61	static pthread_keys cfa_pthread_keys_storage[PTHREAD_KEYS_MAX] __attribute__((aligned (16)));
62
63	static void init_pthread_storage() {
64	for ( int i = 0; i < PTHREAD_KEYS_MAX; i++ ) {
65	cfa_pthread_keys_storage[i]{};
66	}
67	}
68
69	#define cfa_pthread_keys ((pthread_keys *)cfa_pthread_keys_storage)
70
71	/* Controlling the iterations of destructors for thread-specific data. */
72	#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
73	/* Number of iterations this implementation does. */
74	#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
75
76	//######################### Parallelism Helpers #########################
77
78	struct Pthread_kernel_threads{
79	inline Colable;
80	processor p;
81	};
82
83	Pthread_kernel_threads & Next( Pthread_kernel_threads n ) {
84	return (Pthread_kernel_threads )Next( (Colable )n );
85	}
86
87	static Stack(Pthread_kernel_threads) cfa_pthreads_kernel_threads;
88	static bool cfa_pthreads_kernel_threads_zero = false; // set to zero ?
89	static int cfa_pthreads_no_kernel_threads = 1; // number of kernel threads
90
91
92	//######################### Cond Helpers #########################
93
94	typedef pthread_cond_var(simple_owner_lock) cfa2pthr_cond_var_t;
95
96	/* condvar helper routines */
97	static void init(pthread_cond_t * pcond) {
98	static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)");
99	cfa2pthr_cond_var_t * _cond = (cfa2pthr_cond_var_t *)pcond;
100	?{}(*_cond);
101	}
102
103	static cfa2pthr_cond_var_t * get(pthread_cond_t * pcond) {
104	static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)");
105	return (cfa2pthr_cond_var_t *)pcond;
106	}
107
108	static void destroy(pthread_cond_t * cond) {
109	static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)");
110	^?{}(*get(cond));
111	}
112
113
114	//######################### Mutex Helper #########################
115
116	/* mutex helper routines */
117	static void mutex_check(pthread_mutex_t * t) {
118	// Use double check to improve performance.
119	// Check is safe on x86; volatile prevents compiler reordering
120	volatile pthread_mutex_t * const mutex_ = t;
121
122	// SKULLDUGGERY: not a portable way to access the kind field, /usr/include/x86_64-linux-gnu/bits/pthreadtypes.h
123	int _lock_val = ((pthread_mutex_t *)mutex_)->__data.__lock;
124
125	// if pthread_mutex_t is initialized by PTHREAD_MUTEX_INITIALIZER, _lock_val should be 0
126	if ( _lock_val == 0 ) {
127	lock(magic_mutex_check);
128	_lock_val = ((pthread_mutex_t *)mutex_)->__data.__lock;
129	if ( _lock_val == 0 ) {
130	pthread_mutex_init( t, NULL );
131	}
132	unlock(magic_mutex_check);
133	}
134	} // mutex_check
135
136
137	static void init(pthread_mutex_t * plock) {
138	static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)");
139	simple_owner_lock * _lock = (simple_owner_lock *)plock;
140	?{}(*_lock);
141	}
142
143	static simple_owner_lock * get(pthread_mutex_t * plock) {
144	static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)");
145	return (simple_owner_lock *)plock;
146	}
147
148	static void destroy(pthread_mutex_t * plock) {
149	static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)");
150	^?{}(*get(plock));
151	}
152
153	//######################### Attr helpers #########################
154	typedef struct cfaPthread_attr_t { // thread attributes
155	int contentionscope;
156	int detachstate;
157	size_t stacksize;
158	void * stackaddr;
159	int policy;
160	int inheritsched;
161	struct sched_param param;
162	} cfaPthread_attr_t;
163
164	static const cfaPthread_attr_t default_attrs {
165	0,
166	0,
167	65_000,
168	NULL,
169	0,
170	0,
171	{0}
172	};
173
174	static cfaPthread_attr_t * get(const pthread_attr_t * attr) {
175	static_assert(sizeof(pthread_attr_t) >= sizeof(cfaPthread_attr_t), "sizeof(pthread_attr_t) < sizeof(cfaPthread_attr_t)");
176	return (cfaPthread_attr_t *)attr;
177	}
178
179
180	//######################### Threads Helper #########################
181
182	// exception for cancel_stack in pthread_exit
183	exception pthread_exit_exp {};
184	static vtable(pthread_exit_exp) exp_vt;
185
186	thread cfaPthread{
187	cfaPthread_attr_t attr;
188	pthread_t pthreadId;
189
190	// pthreads return value
191	void * joinval;
192
193	// pthread attributes
194	pthread_attr_t pthread_attr;
195
196	void ( start_routine)(void *);
197	void * start_arg;
198
199	// thread local data
200	pthread_values * pthreadData;
201
202	// flag used for tryjoin
203	bool isTerminated;
204	};
205
206	/* thread part routines */
207	// cfaPthread entry point
208	void main(cfaPthread & _thread) with(_thread) {
209	joinval = start_routine(start_arg);
210	isTerminated = true;
211	}
212
213	static cfaPthread * lookup( pthread_t p ) {
214	static_assert(sizeof(pthread_t) >= sizeof(cfaPthread ),"sizeof(pthread_t) < sizeof(cfaPthread )");
215	return (cfaPthread *)p;
216	}
217
218	static void pthread_deletespecific_( pthread_values * values ) { // see uMachContext::invokeTask
219	pthread_values * value;
220	pthread_keys * key;
221	bool destcalled = true;
222	if (values != NULL) {
223	for ( int attempts = 0; attempts < PTHREAD_DESTRUCTOR_ITERATIONS && destcalled ; attempts += 1 ) {
224	destcalled = false;
225	lock(key_lock);
226	for ( int i = 0; i < PTHREAD_KEYS_MAX; i++ ) {
227	// for each valid key
228	if ( values[i].in_use) {
229	value = &values[i];
230	key = &cfa_pthread_keys[i];
231	value->in_use = false;
232	remove(key->threads, *value);
233	// if a key value has a non-NULL destructor pointer, and the thread has a non-NULL value associated with that key,
234	// the value of the key is set to NULL, and then the function pointed to is called with the previously associated value as its sole argument.
235	if (value->value != NULL && key->destructor != NULL) {
236	unlock(key_lock);
237	key->destructor(value->value); // run destructor
238	lock(key_lock);
239	destcalled = true;
240	} // if
241	value->value = NULL;
242	} // if
243	} // for
244	unlock(key_lock);
245	} // for
246	free(values);
247	} // if
248	}
249
250	static void ^?{}(cfaPthread & mutex t) {
251	// delete pthread local storage
252	pthread_values * values = t.pthreadData;
253	pthread_deletespecific_(values);
254	}
255
256	static void ?{}(cfaPthread & t, pthread_t * _thread, const pthread_attr_t * _attr,void ( start_routine)(void ), void arg) {
257	static_assert(sizeof(pthread_t) >= sizeof(cfaPthread ), "pthread_t too small to hold a pointer: sizeof(pthread_t) < sizeof(cfaPthread )");
258
259	// set up user thread stackSize
260	cfaPthread_attr_t * attr = get(_attr);
261	((thread&)t){ attr ? attr->stacksize: DEFAULT_STACK_SIZE };
262
263	// initialize _thread & cfaPthread id
264	*_thread = t.pthreadId = (pthread_t)(&t);
265
266	// if attr null, self attr will be set as default_attrs; else set to attr
267	t.attr = (attr != NULL ? *attr : default_attrs);
268
269	// init start routine and arguments
270	t.start_routine = start_routine;
271	t.start_arg = arg;
272	t.pthreadData = NULL;
273	}
274
275
276	extern "C"{
277	//######################### Pthread Attrs #########################
278
279	int pthread_attr_init(pthread_attr_t * attr) libcfa_public __THROW {
280	cfaPthread_attr_t * _attr = get(attr);
281	?{}(*_attr, default_attrs);
282	return 0;
283	}
284	int pthread_attr_destroy(pthread_attr_t * attr) libcfa_public __THROW {
285	^?{}(*get(attr));
286	return 0;
287	}
288
289	int pthread_attr_setscope( pthread_attr_t * attr, int contentionscope ) libcfa_public __THROW {
290	get( attr )->contentionscope = contentionscope;
291	return 0;
292	} // pthread_attr_setscope
293
294	int pthread_attr_getscope( const pthread_attr_t * attr, int * contentionscope ) libcfa_public __THROW {
295	*contentionscope = get( attr )->contentionscope;
296	return 0;
297	} // pthread_attr_getscope
298
299	int pthread_attr_setdetachstate( pthread_attr_t * attr, int detachstate ) libcfa_public __THROW {
300	get( attr )->detachstate = detachstate;
301	return 0;
302	} // pthread_attr_setdetachstate
303
304	int pthread_attr_getdetachstate( const pthread_attr_t * attr, int * detachstate ) libcfa_public __THROW {
305	*detachstate = get( attr )->detachstate;
306	return 0;
307	} // pthread_attr_getdetachstate
308
309	int pthread_attr_setstacksize( pthread_attr_t * attr, size_t stacksize ) libcfa_public __THROW {
310	get( attr )->stacksize = stacksize;
311	return 0;
312	} // pthread_attr_setstacksize
313
314	int pthread_attr_getstacksize( const pthread_attr_t * attr, size_t * stacksize ) libcfa_public __THROW {
315	*stacksize = get( attr )->stacksize;
316	return 0;
317	} // pthread_attr_getstacksize
318
319	int pthread_attr_getguardsize( const pthread_attr_t * /* attr /, size_t /* guardsize */ ) libcfa_public __THROW {
320	return 0;
321	} // pthread_attr_getguardsize
322
323	int pthread_attr_setguardsize( pthread_attr_t * /* attr /, size_t / guardsize */ ) libcfa_public __THROW {
324	return 0;
325	} // pthread_attr_setguardsize
326
327	int pthread_attr_setstackaddr( pthread_attr_t * attr, void * stackaddr ) libcfa_public __THROW {
328	get( attr )->stackaddr = stackaddr;
329	return 0;
330	} // pthread_attr_setstackaddr
331
332	int pthread_attr_getstackaddr( const pthread_attr_t * attr, void ** stackaddr ) libcfa_public __THROW {
333	*stackaddr = get( attr )->stackaddr;
334	return 0;
335	} // pthread_attr_getstackaddr
336
337	int pthread_attr_setstack( pthread_attr_t * attr, void * stackaddr, size_t stacksize ) libcfa_public __THROW {
338	get( attr )->stackaddr = stackaddr;
339	get( attr )->stacksize = stacksize;
340	return 0;
341	} // pthread_attr_setstack
342
343	int pthread_attr_getstack( const pthread_attr_t * attr, void ** stackaddr, size_t * stacksize ) libcfa_public __THROW {
344	*stackaddr = get( attr )->stackaddr;
345	*stacksize = get( attr )->stacksize;
346	return 0;
347	} // pthread_attr_getstack
348
349	// Initialize thread attribute *attr with attributes corresponding to the
350	// already running thread threadID. It shall be called on unitialized attr
351	// and destroyed with pthread_attr_destroy when no longer needed.
352	int pthread_getattr_np( pthread_t threadID, pthread_attr_t * attr ) libcfa_public __THROW { // GNU extension
353	check_nonnull(attr);
354
355	// copy all fields
356	*get(attr) = lookup( threadID )->attr;
357
358	return 0;
359	} // pthread_getattr_np
360
361
362	//######################### Threads #########################
363
364	int pthread_create(pthread_t * _thread, const pthread_attr_t * attr, void ( start_routine)(void ), void arg) libcfa_public __THROW {
365	cfaPthread * t = alloc();
366	(*t){_thread, attr, start_routine, arg};
367	return 0;
368	}
369
370	int pthread_join(pthread_t _thread, void ** value_ptr) libcfa_public __THROW {
371	// if thread is invalid
372	if (_thread == NULL) return EINVAL;
373	if (_thread == pthread_self()) return EDEADLK;
374
375	// get user thr pointer
376	cfaPthread * p = lookup(_thread);
377	try {
378	join(*p);
379	}
380	// if thread called pthread_exit
381	catchResume (ThreadCancelled(cfaPthread) * cancel) {}
382
383	// fetch result
384	if (value_ptr != NULL ) *value_ptr = p->joinval;
385	delete(p);
386	return 0;
387	}
388
389	int pthread_tryjoin_np(pthread_t _thread, void ** value_ptr) libcfa_public __THROW {
390	// if thread is invalid
391	if (_thread == NULL) return EINVAL;
392	if (_thread == pthread_self()) return EDEADLK;
393
394	cfaPthread * p = lookup(_thread);
395
396	// thread not finished ?
397	if (!p->isTerminated) return EBUSY;
398
399	join( *p );
400
401	if (value_ptr != NULL ) *value_ptr = p->joinval;
402	delete(p);
403	return 0;
404	}
405
406	pthread_t pthread_self(void) libcfa_public __THROW {
407	return (pthread_t)((uintptr_t)active_thread() - (sizeof(cfaPthread) - sizeof(thread$)));
408	}
409
410	void pthread_exit(void * status) libcfa_public __THROW {
411	pthread_t pid = pthread_self();
412	cfaPthread * _thread = (cfaPthread *)pid;
413	_thread->joinval = status; // set return value
414	_thread->isTerminated = 1; // set terminated flag
415	cancel_stack((pthread_exit_exp){&exp_vt});
416	} //pthread_exit_
417
418	int pthread_yield( void ) __THROW { // GNU extension
419	yield();
420	return 0;
421	}
422
423
424	//######################### Mutex #########################
425
426	int pthread_mutex_init(pthread_mutex_t _mutex, const pthread_mutexattr_t attr) libcfa_public __THROW {
427	check_nonnull(_mutex);
428	init(_mutex);
429	return 0;
430	} //pthread_mutex_init_
431
432
433	int pthread_mutex_destroy(pthread_mutex_t *_mutex) libcfa_public __THROW {
434	check_nonnull(_mutex);
435	simple_owner_lock * _lock = get(_mutex);
436	if (_lock->owner != NULL) {
437	return EBUSY;
438	}
439	destroy(_mutex);
440	return 0;
441	} //pthread_mutex_destroy_
442
443	int pthread_mutex_lock(pthread_mutex_t *_mutex) libcfa_public __THROW {
444	check_nonnull(_mutex);
445	mutex_check(_mutex);
446	simple_owner_lock * _lock = get(_mutex);
447	lock(*_lock);
448	return 0;
449	} //pthread_mutex_lock_
450
451	int pthread_mutex_unlock(pthread_mutex_t *_mutex) libcfa_public __THROW {
452	check_nonnull(_mutex);
453	simple_owner_lock * _lock = get(_mutex);
454	if (_lock->owner != active_thread()) {
455	return EPERM;
456	} // current thread does not hold the mutex
457	unlock(*_lock);
458	return 0;
459	} //pthread_mutex_unlock_
460
461	int pthread_mutex_trylock(pthread_mutex_t *_mutex) libcfa_public __THROW {
462	check_nonnull(_mutex);
463	simple_owner_lock * _lock = get(_mutex);
464	if (_lock->owner != active_thread() && _lock->owner != NULL) {
465	return EBUSY;
466	} // if mutex is owned
467	lock(*_lock);
468	return 0;
469	} //pthread_mutex_trylock_
470
471	//######################### Conditional Variable #########################
472
473	/* conditional variable routines */
474	int pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * attr) libcfa_public __THROW {
475	check_nonnull(cond);
476	init(cond);
477	return 0;
478	} //pthread_cond_init
479
480	int pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t *_mutex) libcfa_public __THROW {
481	check_nonnull(_mutex);
482	check_nonnull(cond);
483	wait(get(cond), get(_mutex));
484	return 0;
485	} // pthread_cond_wait
486
487	int pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * _mutex, const struct timespec * abstime) libcfa_public __THROW {
488	check_nonnull(_mutex);
489	check_nonnull(cond);
490	wait(get(cond), get(_mutex), *abstime);
491	return 0;
492	} // pthread_cond_timedwait
493
494	int pthread_cond_signal(pthread_cond_t * cond) libcfa_public __THROW {
495	check_nonnull(cond);
496	return notify_one(*get(cond));
497	} // pthread_cond_signal
498
499	int pthread_cond_broadcast(pthread_cond_t * cond) libcfa_public __THROW {
500	check_nonnull(cond);
501	return notify_all(*get(cond));
502	} // pthread_cond_broadcast
503
504	int pthread_cond_destroy(pthread_cond_t * cond) libcfa_public __THROW {
505	check_nonnull(cond);
506	destroy(cond);
507	return 0;
508	} // pthread_cond_destroy
509
510
511
512	//######################### Local storage #########################
513
514	int pthread_once(pthread_once_t * once_control, void (* init_routine)(void)) libcfa_public __THROW {
515	static_assert(sizeof(pthread_once_t) >= sizeof(int),"sizeof(pthread_once_t) < sizeof(int)");
516	check_nonnull(once_control);
517	check_nonnull(init_routine);
518	lock(once_lock);
519	if ( ((int )once_control) == 0 ) {
520	init_routine();
521	((int )once_control) = 1;
522	} // if
523	unlock(once_lock);
524	return 0;
525	} // pthread_once
526
527	int pthread_key_create( pthread_key_t * key, void (* destructor)( void * ) ) libcfa_public __THROW {
528	lock(key_lock);
529	for ( int i = 0; i < PTHREAD_KEYS_MAX; i += 1 ) {
530	if ( ! cfa_pthread_keys[i].in_use ) {
531	cfa_pthread_keys[i].in_use = true;
532	cfa_pthread_keys[i].destructor = destructor;
533	unlock( key_lock );
534	*key = i;
535	return 0;
536	} // if
537	} // for
538	unlock(key_lock);
539	return EAGAIN;
540	} // pthread_key_create
541
542	int pthread_key_delete( pthread_key_t key ) libcfa_public __THROW {
543	lock(key_lock);
544	if ( key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use ) {
545	unlock( key_lock );
546	return EINVAL;
547	} // if
548	cfa_pthread_keys[key].in_use = false;
549	cfa_pthread_keys[key].destructor = NULL;
550
551	// Remove key from all threads with a value.
552	pthread_values& p;
553	Sequence(pthread_values)& head = cfa_pthread_keys[key].threads;
554	for ( SeqIter(pthread_values) iter = { head }; iter \| p; ) {
555	remove(head, p);
556	p.in_use = false;
557	}
558	unlock(key_lock);
559	return 0;
560	} // pthread_key_delete
561
562	int pthread_setspecific( pthread_key_t key, const void * value ) libcfa_public __THROW {
563	// get current thread
564	cfaPthread * t = lookup(pthread_self());
565	// if current thread's pthreadData is NULL; initialize it
566	pthread_values * values;
567	if (t->pthreadData == NULL) {
568	values = anew( PTHREAD_KEYS_MAX);
569	t->pthreadData = values;
570	for ( int i = 0;i < PTHREAD_KEYS_MAX; i++ ) {
571	t->pthreadData[i].in_use = false;
572	} // for
573	} else {
574	values = t->pthreadData;
575	} // if
576	// find corresponding key and set value
577	lock(key_lock);
578	// if invalid key
579	if ( key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use ) {
580	unlock( key_lock );
581	return EINVAL;
582	} // if
583	pthread_values &entry = values[key];
584	if ( ! entry.in_use ) {
585	entry.in_use = true;
586	add(cfa_pthread_keys[key].threads, entry);
587	} // if
588	entry.value = (void *)value;
589	unlock(key_lock);
590	return 0;
591	} //pthread_setspecific
592
593	void * pthread_getspecific(pthread_key_t key) libcfa_public __THROW {
594	if (key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use) return NULL;
595
596	// get current thread
597	cfaPthread * t = lookup(pthread_self());
598	if (t->pthreadData == NULL) return NULL;
599	lock(key_lock);
600	pthread_values & entry = ((pthread_values *)t->pthreadData)[key];
601	if ( ! entry.in_use ) {
602	unlock( key_lock );
603	return NULL;
604	} // if
605	void * value = entry.value;
606	unlock(key_lock);
607
608	return value;
609	} //pthread_get_specific
610
611	//######################### Parallelism #########################
612	void pthread_delete_kernel_threads_() __THROW { // see uMain::~uMain
613	Pthread_kernel_threads& p;
614	for ( StackIter(Pthread_kernel_threads) iter = {cfa_pthreads_kernel_threads}; iter \| p; ) {
615	delete(&p);
616	} // for
617	} // pthread_delete_kernel_threads_
618
619	int pthread_getconcurrency( void ) __THROW { // XOPEN extension
620	return cfa_pthreads_kernel_threads_zero ? 0 : cfa_pthreads_no_kernel_threads;
621	} // pthread_getconcurrency
622
623	int pthread_setconcurrency( int new_level ) libcfa_public __THROW { // XOPEN extension
624	if ( new_level < 0 ) return EINVAL;
625	if ( new_level == 0 ) {
626	cfa_pthreads_kernel_threads_zero = true; // remember set to zero, but ignore
627	return 0; // do not do kernel thread management
628	} // exit
629	cfa_pthreads_kernel_threads_zero = false;
630	lock( concurrency_lock );
631	for ( ; new_level > cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads += 1 ) { // add processors ?
632	push(cfa_pthreads_kernel_threads, *new() );
633	} // for
634	for ( ; new_level < cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads -= 1 ) { // remove processors ?
635	delete(&pop(cfa_pthreads_kernel_threads));
636	} // for
637	unlock( concurrency_lock );
638	return 0;
639	} // pthread_setconcurrency
640
641	//######################### Signal #########################
642
643
644	int pthread_sigmask( int /* how /, const sigset_t /* set /, sigset_t /* oset */ ) libcfa_public __THROW {
645	abort( "pthread_sigmask : not implemented" );
646	return 0;
647	} // pthread_sigmask
648
649	int pthread_kill( pthread_t _thread __attribute__(( unused )), int sig ) libcfa_public __THROW {
650	if ( sig == 0 ) {
651	return 0;
652	} else {
653	abort( "pthread_kill : not implemented" );
654	} // if
655	return 0;
656	} // pthread_kill
657
658	int pthread_sigqueue(pthread_t , int sig, const union sigval) libcfa_public __THROW {
659	abort( "pthread_sigqueue : not implemented" );
660	return 0;
661	} // pthread_sigqueue
662
663	//######################### Scheduling #########################
664	int pthread_detach( pthread_t threadID ) __THROW {
665	abort( "pthread_detach : not implemented" );
666	return 0;
667	} // pthread_detach
668
669	int pthread_setschedparam( pthread_t /* thread /, int / policy /, const struct sched_param /* param */ ) libcfa_public __THROW {
670	abort( "pthread_setschedparam : not implemented" );
671	return 0;
672	} // pthread_setschedparam
673
674	int pthread_getschedparam( pthread_t /* thread /, int /* policy /, struct sched_param /* param */ ) libcfa_public __THROW {
675	abort( "pthread_getschedparam : not implemented" );
676	return 0;
677	} // pthread_getschedparam
678
679	//######################### Mutex Attr #########################
680
681	int pthread_mutexattr_init( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW {
682	return 0;
683	} // pthread_mutexattr_init
684
685	int pthread_mutexattr_destroy( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW {
686	return 0;
687	} // pthread_mutexattr_destroy
688
689	int pthread_mutexattr_setpshared( pthread_mutexattr_t * /* attr /, int / pshared */ ) libcfa_public __THROW {
690	return 0;
691	} // pthread_mutexattr_setpshared
692
693	int pthread_mutexattr_getpshared( const pthread_mutexattr_t * /* attr /, int /* pshared */ ) libcfa_public __THROW {
694	return 0;
695	} // pthread_mutexattr_getpshared
696
697	int pthread_mutexattr_setprotocol( pthread_mutexattr_t * /* attr /, int / protocol */ ) libcfa_public __THROW {
698	return 0;
699	} // pthread_mutexattr_setprotocol
700
701	int pthread_mutexattr_getprotocol( const pthread_mutexattr_t * /* attr /, int /* protocol */ ) libcfa_public __THROW {
702	return 0;
703	} // pthread_mutexattr_getprotocol
704
705	int pthread_mutexattr_setprioceiling( pthread_mutexattr_t * /* attr /, int / prioceiling */ ) libcfa_public __THROW {
706	return 0;
707	} // pthread_mutexattr_setprioceiling
708
709	int pthread_mutexattr_getprioceiling( const pthread_mutexattr_t * /* attr /, int /* ceiling */ ) libcfa_public __THROW {
710	return 0;
711	} // pthread_mutexattr_getprioceiling
712
713	int pthread_mutex_setprioceiling( pthread_mutex_t * /* mutex /, int / prioceiling /, int /* old_ceiling */ ) libcfa_public __THROW {
714	return 0;
715	} // pthread_mutex_setprioceiling
716
717	int pthread_mutex_getprioceiling( const pthread_mutex_t * /* mutex /, int /* ceiling */ ) libcfa_public __THROW {
718	return 0;
719	} // pthread_mutex_getprioceiling
720
721	int pthread_mutexattr_gettype( __const pthread_mutexattr_t * __restrict /* __attr /, int __restrict /* __kind */ ) libcfa_public __THROW {
722	return 0;
723	} // pthread_mutexattr_gettype
724
725	int pthread_mutexattr_settype( pthread_mutexattr_t * /* __attr /, int / __kind */ ) libcfa_public __THROW {
726	return 0;
727	} // pthread_mutexattr_settype
728
729	//######################### Mutex #########################
730
731	int pthread_mutex_timedlock( pthread_mutex_t __restrict / __mutex /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
732	abort( "pthread_mutex_timedlock" );
733	} // pthread_mutex_timedlock
734
735	//######################### Condition #########################
736
737	int pthread_condattr_getclock( __const pthread_condattr_t * __restrict /* __attr /, __clockid_t __restrict /* __clock_id */ ) libcfa_public __THROW {
738	abort( "pthread_condattr_getclock" );
739	} // pthread_condattr_getclock
740
741	int pthread_condattr_setclock( pthread_condattr_t * /* __attr /, __clockid_t / __clock_id */ ) libcfa_public __THROW {
742	abort( "pthread_condattr_setclock" );
743	} // pthread_condattr_setclock
744
745	//######################### Spinlock #########################
746
747	int pthread_spin_init( pthread_spinlock_t * /* __lock /, int /__pshared */ ) libcfa_public __THROW {
748	abort( "pthread_spin_init" );
749	} // pthread_spin_init
750
751	int pthread_spin_destroy( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
752	abort( "pthread_spin_destroy" );
753	} // pthread_spin_destroy
754
755	int pthread_spin_lock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
756	abort( "pthread_spin_lock" );
757	} // pthread_spin_lock
758
759	int pthread_spin_trylock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
760	abort( "pthread_spin_trylock" );
761	} // pthread_spin_trylock
762
763	int pthread_spin_unlock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
764	abort( "pthread_spin_unlock" );
765	} // pthread_spin_unlock
766
767	//######################### Barrier #########################
768
769	int pthread_barrier_init( pthread_barrier_t __restrict / __barrier /, __const pthread_barrierattr_t __restrict /* __attr /, unsigned int / __count */ ) libcfa_public __THROW {
770	abort( "pthread_barrier_init" );
771	} // pthread_barrier_init
772
773	int pthread_barrier_destroy( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW {
774	abort( "pthread_barrier_destroy" );
775	} // pthread_barrier_destroy
776
777	int pthread_barrier_wait( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW {
778	abort( "pthread_barrier_wait" );
779	} // pthread_barrier_wait
780
781	int pthread_barrierattr_init( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW {
782	abort( "pthread_barrierattr_init" );
783	} // pthread_barrierattr_init
784
785	int pthread_barrierattr_destroy( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW {
786	abort( "pthread_barrierattr_destroy" );
787	} // pthread_barrierattr_destroy
788
789	int pthread_barrierattr_getpshared( __const pthread_barrierattr_t * __restrict /* __attr /, int __restrict /* __pshared */ ) libcfa_public __THROW {
790	abort( "pthread_barrierattr_getpshared" );
791	} // pthread_barrierattr_getpshared
792
793	int pthread_barrierattr_setpshared( pthread_barrierattr_t * /* __attr /, int / __pshared */ ) libcfa_public __THROW {
794	abort( "pthread_barrierattr_setpshared" );
795	} // pthread_barrierattr_setpshared
796
797	//######################### Clock #########################
798
799	int pthread_getcpuclockid( pthread_t /* __thread_id /, __clockid_t /* __clock_id */ ) libcfa_public __THROW {
800	abort( "pthread_getcpuclockid" );
801	} // pthread_getcpuclockid
802
803	// pthread_atfork()
804
805	// UNIX98
806
807	//######################### Read/Write #########################
808
809	int pthread_rwlock_init( pthread_rwlock_t __restrict / __rwlock /, __const pthread_rwlockattr_t __restrict /* __attr */ ) libcfa_public __THROW {
810	abort( "pthread_rwlock_init" );
811	} // pthread_rwlock_init
812
813	int pthread_rwlock_destroy( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
814	abort( "pthread_rwlock_destroy" );
815	} // pthread_rwlock_destroy
816
817	int pthread_rwlock_rdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
818	abort( "pthread_rwlock_rdlock" );
819	} // pthread_rwlock_rdlock
820
821	int pthread_rwlock_tryrdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
822	abort( "pthread_rwlock_tryrdlock" );
823	} // pthread_rwlock_tryrdlock
824
825	int pthread_rwlock_wrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
826	abort( "pthread_rwlock_wrlock" );
827	} // pthread_rwlock_wrlock
828
829	int pthread_rwlock_trywrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
830	abort( "pthread_rwlock_trywrlock" );
831	} // pthread_rwlock_trywrlock
832
833	int pthread_rwlock_unlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
834	abort( "pthread_rwlock_unlock" );
835	} // pthread_rwlock_unlock
836
837	int pthread_rwlockattr_init( pthread_rwlockattr_t * /* __attr */ ) libcfa_public __THROW {
838	abort( "pthread_rwlockattr_init" );
839	} // pthread_rwlockattr_init
840
841	int pthread_rwlockattr_destroy( pthread_rwlockattr_t * /__attr / ) libcfa_public __THROW {
842	abort( "pthread_rwlockattr_destroy" );
843	} // pthread_rwlockattr_destroy
844
845	int pthread_rwlockattr_getpshared( __const pthread_rwlockattr_t * __restrict /* __attr /, int __restrict /* __pshared */ ) libcfa_public __THROW {
846	abort( "pthread_rwlockattr_getpshared" );
847	} // pthread_rwlockattr_getpshared
848
849	int pthread_rwlockattr_setpshared( pthread_rwlockattr_t * /* __attr /, int / __pshared */ ) libcfa_public __THROW {
850	abort( "pthread_rwlockattr_setpshared" );
851	} // pthread_rwlockattr_setpshared
852
853	int pthread_rwlockattr_getkind_np( __const pthread_rwlockattr_t * /* __attr /, int /* __pref */ ) libcfa_public __THROW {
854	abort( "pthread_rwlockattr_getkind_np" );
855	} // pthread_rwlockattr_getkind_np
856
857	int pthread_rwlockattr_setkind_np( pthread_rwlockattr_t * /* __attr /, int / __pref */ ) libcfa_public __THROW {
858	abort( "pthread_rwlockattr_setkind_np" );
859	} // pthread_rwlockattr_setkind_np
860
861	// UNIX98 + XOPEN
862
863	int pthread_rwlock_timedrdlock( pthread_rwlock_t __restrict / __rwlock /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
864	abort( "pthread_rwlock_timedrdlock" );
865	} // pthread_rwlock_timedrdlock
866
867	int pthread_rwlock_timedwrlock( pthread_rwlock_t __restrict / __rwlock /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
868	abort( "pthread_rwlock_timedwrlock" );
869	} // pthread_rwlock_timedwrlock
870
871	// GNU
872
873	//######################### Parallelism #########################
874
875	// int pthread_setaffinity_np( pthread_t /* __th /, size_t / __cpusetsize /, __const cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
876	// abort( "pthread_setaffinity_np" );
877	// } // pthread_setaffinity_np
878
879	// int pthread_getaffinity_np( pthread_t /* __th /, size_t / __cpusetsize /, cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
880	// abort( "pthread_getaffinity_np" );
881	// } // pthread_getaffinity_np
882
883	// int pthread_attr_setaffinity_np( pthread_attr_t * /* __attr /, size_t / __cpusetsize /, __const cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
884	// abort( "pthread_attr_setaffinity_np" );
885	// } // pthread_attr_setaffinity_np
886
887	// int pthread_attr_getaffinity_np( __const pthread_attr_t * /* __attr /, size_t / __cpusetsize /, cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
888	// abort( "pthread_attr_getaffinity_np" );
889	// } // pthread_attr_getaffinity_np
890
891	//######################### Cancellation #########################
892
893	void _pthread_cleanup_push_defer( struct _pthread_cleanup_buffer * /* __buffer /, void( /* __routine / )( void ), void * /* __arg */ ) libcfa_public __THROW {
894	abort( "_pthread_cleanup_push_defer" );
895	} // _pthread_cleanup_push_defer
896
897	void _pthread_cleanup_pop_restore( struct _pthread_cleanup_buffer * /* __buffer /, int / __execute */ ) libcfa_public __THROW {
898	abort( "_pthread_cleanup_pop_restore" );
899	} // _pthread_cleanup_pop_res
900
901	int pthread_cancel( pthread_t threadID ) libcfa_public __THROW {
902	abort("pthread cancel not implemented");
903	return 0;
904	} // pthread_cancel
905
906	int pthread_setcancelstate( int state, int * oldstate ) libcfa_public __THROW {
907	abort("pthread_setcancelstate not implemented");
908	return 0;
909	} // pthread_setcancelstate
910
911	int pthread_setcanceltype( int type, int * oldtype ) libcfa_public __THROW {
912	abort("pthread_setcanceltype not implemented");
913	return 0;
914	} // pthread_setcanceltype
915	} // extern "C"
916
917	#pragma GCC diagnostic pop

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