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pthread.cfa@ 0ac8d07

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Last change on this file since 0ac8d07 was 555af62, checked in by Peter A. Buhr <pabuhr@…>, 2 years ago
add include bits/sequence.hfa to pthread.cfa after removing it from weakso_lock.hfa
Property mode set to `100644`
File size: 30.6 KB

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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 : Peter A. Buhr
12	// Last Modified On : Mon Sep 4 15:37:51 2023
13	// Update Count : 1
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	#include "bits/sequence.hfa"
24
25
26	#define check_nonnull(x) asm("": "+rm"(x)); if( x == 0p ) return EINVAL;
27
28	/* pthread key, pthread once inner routine mutual exclusion */
29	static simple_owner_lock once_lock,key_lock,magic_mutex_check, concurrency_lock;
30
31	//######################### Local Storage Helpers #########################
32
33	enum { PTHREAD_KEYS_MAX = 1024 };
34
35	struct pthread_values{
36	inline Seqable;
37	void * value;
38	bool in_use;
39	};
40
41	static inline {
42	pthread_values & Back( pthread_values n ) {
43	return (pthread_values )Back( (Seqable )n );
44	}
45
46	pthread_values & Next( pthread_values n ) {
47	return (pthread_values )Next( (Colable )n );
48	}
49	}
50
51	struct pthread_keys {
52	bool in_use;
53	void (* destructor)( void * );
54	Sequence(pthread_values) threads;
55	};
56
57	static void ?{}(pthread_keys& k) {
58	k.threads{};
59	}
60
61	// Create storage separately to ensure no constructors are called.
62	static pthread_keys cfa_pthread_keys_storage[PTHREAD_KEYS_MAX] __attribute__((aligned (16)));
63
64	static void init_pthread_storage() {
65	for ( int i = 0; i < PTHREAD_KEYS_MAX; i++ ) {
66	cfa_pthread_keys_storage[i]{};
67	}
68	}
69
70	#define cfa_pthread_keys ((pthread_keys *)cfa_pthread_keys_storage)
71
72	/* Controlling the iterations of destructors for thread-specific data. */
73	#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
74	/* Number of iterations this implementation does. */
75	#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
76
77	//######################### Parallelism Helpers #########################
78
79	struct Pthread_kernel_threads{
80	inline Colable;
81	processor p;
82	};
83
84	Pthread_kernel_threads & Next( Pthread_kernel_threads n ) {
85	return (Pthread_kernel_threads )Next( (Colable )n );
86	}
87
88	static Stack(Pthread_kernel_threads) cfa_pthreads_kernel_threads;
89	static bool cfa_pthreads_kernel_threads_zero = false; // set to zero ?
90	static int cfa_pthreads_no_kernel_threads = 1; // number of kernel threads
91
92
93	//######################### Cond Helpers #########################
94
95	typedef pthread_cond_var(simple_owner_lock) cfa2pthr_cond_var_t;
96
97	/* condvar helper routines */
98	static void init(pthread_cond_t * pcond) {
99	static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)");
100	cfa2pthr_cond_var_t * _cond = (cfa2pthr_cond_var_t *)pcond;
101	?{}(*_cond);
102	}
103
104	static cfa2pthr_cond_var_t * get(pthread_cond_t * pcond) {
105	static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)");
106	return (cfa2pthr_cond_var_t *)pcond;
107	}
108
109	static void destroy(pthread_cond_t * cond) {
110	static_assert(sizeof(pthread_cond_t) >= sizeof(cfa2pthr_cond_var_t),"sizeof(pthread_t) < sizeof(cfa2pthr_cond_var_t)");
111	^?{}(*get(cond));
112	}
113
114
115	//######################### Mutex Helper #########################
116
117	/* mutex helper routines */
118	static void mutex_check(pthread_mutex_t * t) {
119	// Use double check to improve performance.
120	// Check is safe on x86; volatile prevents compiler reordering
121	volatile pthread_mutex_t * const mutex_ = t;
122
123	// SKULLDUGGERY: not a portable way to access the kind field, /usr/include/x86_64-linux-gnu/bits/pthreadtypes.h
124	int _lock_val = ((pthread_mutex_t *)mutex_)->__data.__lock;
125
126	// if pthread_mutex_t is initialized by PTHREAD_MUTEX_INITIALIZER, _lock_val should be 0
127	if ( _lock_val == 0 ) {
128	lock(magic_mutex_check);
129	_lock_val = ((pthread_mutex_t *)mutex_)->__data.__lock;
130	if ( _lock_val == 0 ) {
131	pthread_mutex_init( t, NULL );
132	}
133	unlock(magic_mutex_check);
134	}
135	} // mutex_check
136
137
138	static void init(pthread_mutex_t * plock) {
139	static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)");
140	simple_owner_lock * _lock = (simple_owner_lock *)plock;
141	?{}(*_lock);
142	}
143
144	static simple_owner_lock * get(pthread_mutex_t * plock) {
145	static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)");
146	return (simple_owner_lock *)plock;
147	}
148
149	static void destroy(pthread_mutex_t * plock) {
150	static_assert(sizeof(pthread_mutex_t) >= sizeof(simple_owner_lock),"sizeof(pthread_mutex_t) < sizeof(simple_owner_lock)");
151	^?{}(*get(plock));
152	}
153
154	//######################### Attr helpers #########################
155	typedef struct cfaPthread_attr_t { // thread attributes
156	int contentionscope;
157	int detachstate;
158	size_t stacksize;
159	void * stackaddr;
160	int policy;
161	int inheritsched;
162	struct sched_param param;
163	} cfaPthread_attr_t;
164
165	static const cfaPthread_attr_t default_attrs {
166	0,
167	0,
168	65_000,
169	NULL,
170	0,
171	0,
172	{0}
173	};
174
175	static cfaPthread_attr_t * get(const pthread_attr_t * attr) {
176	static_assert(sizeof(pthread_attr_t) >= sizeof(cfaPthread_attr_t), "sizeof(pthread_attr_t) < sizeof(cfaPthread_attr_t)");
177	return (cfaPthread_attr_t *)attr;
178	}
179
180
181	//######################### Threads Helper #########################
182
183	// exception for cancel_stack in pthread_exit
184	exception pthread_exit_exp {};
185	static vtable(pthread_exit_exp) exp_vt;
186
187	thread cfaPthread{
188	cfaPthread_attr_t attr;
189	pthread_t pthreadId;
190
191	// pthreads return value
192	void * joinval;
193
194	// pthread attributes
195	pthread_attr_t pthread_attr;
196
197	void ( start_routine)(void *);
198	void * start_arg;
199
200	// thread local data
201	pthread_values * pthreadData;
202
203	// flag used for tryjoin
204	bool isTerminated;
205	};
206
207	/* thread part routines */
208	// cfaPthread entry point
209	void main(cfaPthread & _thread) with(_thread) {
210	joinval = start_routine(start_arg);
211	isTerminated = true;
212	}
213
214	static cfaPthread * lookup( pthread_t p ) {
215	static_assert(sizeof(pthread_t) >= sizeof(cfaPthread ),"sizeof(pthread_t) < sizeof(cfaPthread )");
216	return (cfaPthread *)p;
217	}
218
219	static void pthread_deletespecific_( pthread_values * values ) { // see uMachContext::invokeTask
220	pthread_values * value;
221	pthread_keys * key;
222	bool destcalled = true;
223	if (values != NULL) {
224	for ( int attempts = 0; attempts < PTHREAD_DESTRUCTOR_ITERATIONS && destcalled ; attempts += 1 ) {
225	destcalled = false;
226	lock(key_lock);
227	for ( int i = 0; i < PTHREAD_KEYS_MAX; i++ ) {
228	// for each valid key
229	if ( values[i].in_use) {
230	value = &values[i];
231	key = &cfa_pthread_keys[i];
232	value->in_use = false;
233	remove(key->threads, *value);
234	// if a key value has a non-NULL destructor pointer, and the thread has a non-NULL value associated with that key,
235	// 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.
236	if (value->value != NULL && key->destructor != NULL) {
237	unlock(key_lock);
238	key->destructor(value->value); // run destructor
239	lock(key_lock);
240	destcalled = true;
241	} // if
242	value->value = NULL;
243	} // if
244	} // for
245	unlock(key_lock);
246	} // for
247	free(values);
248	} // if
249	}
250
251	static void ^?{}(cfaPthread & mutex t) {
252	// delete pthread local storage
253	pthread_values * values = t.pthreadData;
254	pthread_deletespecific_(values);
255	}
256
257	static void ?{}(cfaPthread & t, pthread_t * _thread, const pthread_attr_t * _attr,void ( start_routine)(void ), void arg) {
258	static_assert(sizeof(pthread_t) >= sizeof(cfaPthread ), "pthread_t too small to hold a pointer: sizeof(pthread_t) < sizeof(cfaPthread )");
259
260	// set up user thread stackSize
261	cfaPthread_attr_t * attr = get(_attr);
262	((thread&)t){ attr ? attr->stacksize: DEFAULT_STACK_SIZE };
263
264	// initialize _thread & cfaPthread id
265	*_thread = t.pthreadId = (pthread_t)(&t);
266
267	// if attr null, self attr will be set as default_attrs; else set to attr
268	t.attr = (attr != NULL ? *attr : default_attrs);
269
270	// init start routine and arguments
271	t.start_routine = start_routine;
272	t.start_arg = arg;
273	t.pthreadData = NULL;
274	}
275
276
277	extern "C"{
278	//######################### Pthread Attrs #########################
279
280	int pthread_attr_init(pthread_attr_t * attr) libcfa_public __THROW {
281	cfaPthread_attr_t * _attr = get(attr);
282	?{}(*_attr, default_attrs);
283	return 0;
284	}
285	int pthread_attr_destroy(pthread_attr_t * attr) libcfa_public __THROW {
286	^?{}(*get(attr));
287	return 0;
288	}
289
290	int pthread_attr_setscope( pthread_attr_t * attr, int contentionscope ) libcfa_public __THROW {
291	get( attr )->contentionscope = contentionscope;
292	return 0;
293	} // pthread_attr_setscope
294
295	int pthread_attr_getscope( const pthread_attr_t * attr, int * contentionscope ) libcfa_public __THROW {
296	*contentionscope = get( attr )->contentionscope;
297	return 0;
298	} // pthread_attr_getscope
299
300	int pthread_attr_setdetachstate( pthread_attr_t * attr, int detachstate ) libcfa_public __THROW {
301	get( attr )->detachstate = detachstate;
302	return 0;
303	} // pthread_attr_setdetachstate
304
305	int pthread_attr_getdetachstate( const pthread_attr_t * attr, int * detachstate ) libcfa_public __THROW {
306	*detachstate = get( attr )->detachstate;
307	return 0;
308	} // pthread_attr_getdetachstate
309
310	int pthread_attr_setstacksize( pthread_attr_t * attr, size_t stacksize ) libcfa_public __THROW {
311	get( attr )->stacksize = stacksize;
312	return 0;
313	} // pthread_attr_setstacksize
314
315	int pthread_attr_getstacksize( const pthread_attr_t * attr, size_t * stacksize ) libcfa_public __THROW {
316	*stacksize = get( attr )->stacksize;
317	return 0;
318	} // pthread_attr_getstacksize
319
320	int pthread_attr_getguardsize( const pthread_attr_t * /* attr /, size_t /* guardsize */ ) libcfa_public __THROW {
321	return 0;
322	} // pthread_attr_getguardsize
323
324	int pthread_attr_setguardsize( pthread_attr_t * /* attr /, size_t / guardsize */ ) libcfa_public __THROW {
325	return 0;
326	} // pthread_attr_setguardsize
327
328	int pthread_attr_setstackaddr( pthread_attr_t * attr, void * stackaddr ) libcfa_public __THROW {
329	get( attr )->stackaddr = stackaddr;
330	return 0;
331	} // pthread_attr_setstackaddr
332
333	int pthread_attr_getstackaddr( const pthread_attr_t * attr, void ** stackaddr ) libcfa_public __THROW {
334	*stackaddr = get( attr )->stackaddr;
335	return 0;
336	} // pthread_attr_getstackaddr
337
338	int pthread_attr_setstack( pthread_attr_t * attr, void * stackaddr, size_t stacksize ) libcfa_public __THROW {
339	get( attr )->stackaddr = stackaddr;
340	get( attr )->stacksize = stacksize;
341	return 0;
342	} // pthread_attr_setstack
343
344	int pthread_attr_getstack( const pthread_attr_t * attr, void ** stackaddr, size_t * stacksize ) libcfa_public __THROW {
345	*stackaddr = get( attr )->stackaddr;
346	*stacksize = get( attr )->stacksize;
347	return 0;
348	} // pthread_attr_getstack
349
350	// Initialize thread attribute *attr with attributes corresponding to the
351	// already running thread threadID. It shall be called on unitialized attr
352	// and destroyed with pthread_attr_destroy when no longer needed.
353	int pthread_getattr_np( pthread_t threadID, pthread_attr_t * attr ) libcfa_public __THROW { // GNU extension
354	check_nonnull(attr);
355
356	// copy all fields
357	*get(attr) = lookup( threadID )->attr;
358
359	return 0;
360	} // pthread_getattr_np
361
362
363	//######################### Threads #########################
364
365	int pthread_create(pthread_t * _thread, const pthread_attr_t * attr, void ( start_routine)(void ), void arg) libcfa_public __THROW {
366	cfaPthread * t = alloc();
367	(*t){_thread, attr, start_routine, arg};
368	return 0;
369	}
370
371	int pthread_join(pthread_t _thread, void ** value_ptr) libcfa_public __THROW {
372	// if thread is invalid
373	if (_thread == NULL) return EINVAL;
374	if (_thread == pthread_self()) return EDEADLK;
375
376	// get user thr pointer
377	cfaPthread * p = lookup(_thread);
378	try {
379	join(*p);
380	}
381	// if thread called pthread_exit
382	catchResume (ThreadCancelled(cfaPthread) * cancel) {}
383
384	// fetch result
385	if (value_ptr != NULL ) *value_ptr = p->joinval;
386	delete(p);
387	return 0;
388	}
389
390	int pthread_tryjoin_np(pthread_t _thread, void ** value_ptr) libcfa_public __THROW {
391	// if thread is invalid
392	if (_thread == NULL) return EINVAL;
393	if (_thread == pthread_self()) return EDEADLK;
394
395	cfaPthread * p = lookup(_thread);
396
397	// thread not finished ?
398	if (!p->isTerminated) return EBUSY;
399
400	join( *p );
401
402	if (value_ptr != NULL ) *value_ptr = p->joinval;
403	delete(p);
404	return 0;
405	}
406
407	pthread_t pthread_self(void) libcfa_public __THROW {
408	return (pthread_t)((uintptr_t)active_thread() - (sizeof(cfaPthread) - sizeof(thread$)));
409	}
410
411	void pthread_exit(void * status) libcfa_public __THROW {
412	pthread_t pid = pthread_self();
413	cfaPthread * _thread = (cfaPthread *)pid;
414	_thread->joinval = status; // set return value
415	_thread->isTerminated = 1; // set terminated flag
416	cancel_stack((pthread_exit_exp){&exp_vt});
417	} //pthread_exit_
418
419	int pthread_yield( void ) __THROW { // GNU extension
420	yield();
421	return 0;
422	}
423
424
425	//######################### Mutex #########################
426
427	int pthread_mutex_init(pthread_mutex_t _mutex, const pthread_mutexattr_t attr) libcfa_public __THROW {
428	check_nonnull(_mutex);
429	init(_mutex);
430	return 0;
431	} //pthread_mutex_init_
432
433
434	int pthread_mutex_destroy(pthread_mutex_t *_mutex) libcfa_public __THROW {
435	check_nonnull(_mutex);
436	simple_owner_lock * _lock = get(_mutex);
437	if (_lock->owner != NULL) {
438	return EBUSY;
439	}
440	destroy(_mutex);
441	return 0;
442	} //pthread_mutex_destroy_
443
444	int pthread_mutex_lock(pthread_mutex_t *_mutex) libcfa_public __THROW {
445	check_nonnull(_mutex);
446	mutex_check(_mutex);
447	simple_owner_lock * _lock = get(_mutex);
448	lock(*_lock);
449	return 0;
450	} //pthread_mutex_lock_
451
452	int pthread_mutex_unlock(pthread_mutex_t *_mutex) libcfa_public __THROW {
453	check_nonnull(_mutex);
454	simple_owner_lock * _lock = get(_mutex);
455	if (_lock->owner != active_thread()) {
456	return EPERM;
457	} // current thread does not hold the mutex
458	unlock(*_lock);
459	return 0;
460	} //pthread_mutex_unlock_
461
462	int pthread_mutex_trylock(pthread_mutex_t *_mutex) libcfa_public __THROW {
463	check_nonnull(_mutex);
464	simple_owner_lock * _lock = get(_mutex);
465	if (_lock->owner != active_thread() && _lock->owner != NULL) {
466	return EBUSY;
467	} // if mutex is owned
468	lock(*_lock);
469	return 0;
470	} //pthread_mutex_trylock_
471
472	//######################### Conditional Variable #########################
473
474	/* conditional variable routines */
475	int pthread_cond_init(pthread_cond_t * cond, const pthread_condattr_t * attr) libcfa_public __THROW {
476	check_nonnull(cond);
477	init(cond);
478	return 0;
479	} //pthread_cond_init
480
481	int pthread_cond_wait(pthread_cond_t * cond, pthread_mutex_t *_mutex) libcfa_public __THROW {
482	check_nonnull(_mutex);
483	check_nonnull(cond);
484	wait(get(cond), get(_mutex));
485	return 0;
486	} // pthread_cond_wait
487
488	int pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * _mutex, const struct timespec * abstime) libcfa_public __THROW {
489	check_nonnull(_mutex);
490	check_nonnull(cond);
491	wait(get(cond), get(_mutex), *abstime);
492	return 0;
493	} // pthread_cond_timedwait
494
495	int pthread_cond_signal(pthread_cond_t * cond) libcfa_public __THROW {
496	check_nonnull(cond);
497	return notify_one(*get(cond));
498	} // pthread_cond_signal
499
500	int pthread_cond_broadcast(pthread_cond_t * cond) libcfa_public __THROW {
501	check_nonnull(cond);
502	return notify_all(*get(cond));
503	} // pthread_cond_broadcast
504
505	int pthread_cond_destroy(pthread_cond_t * cond) libcfa_public __THROW {
506	check_nonnull(cond);
507	destroy(cond);
508	return 0;
509	} // pthread_cond_destroy
510
511
512
513	//######################### Local storage #########################
514
515	int pthread_once(pthread_once_t * once_control, void (* init_routine)(void)) libcfa_public __THROW {
516	static_assert(sizeof(pthread_once_t) >= sizeof(int),"sizeof(pthread_once_t) < sizeof(int)");
517	check_nonnull(once_control);
518	check_nonnull(init_routine);
519	lock(once_lock);
520	if ( ((int )once_control) == 0 ) {
521	init_routine();
522	((int )once_control) = 1;
523	} // if
524	unlock(once_lock);
525	return 0;
526	} // pthread_once
527
528	int pthread_key_create( pthread_key_t * key, void (* destructor)( void * ) ) libcfa_public __THROW {
529	lock(key_lock);
530	for ( int i = 0; i < PTHREAD_KEYS_MAX; i += 1 ) {
531	if ( ! cfa_pthread_keys[i].in_use ) {
532	cfa_pthread_keys[i].in_use = true;
533	cfa_pthread_keys[i].destructor = destructor;
534	unlock( key_lock );
535	*key = i;
536	return 0;
537	} // if
538	} // for
539	unlock(key_lock);
540	return EAGAIN;
541	} // pthread_key_create
542
543	int pthread_key_delete( pthread_key_t key ) libcfa_public __THROW {
544	lock(key_lock);
545	if ( key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use ) {
546	unlock( key_lock );
547	return EINVAL;
548	} // if
549	cfa_pthread_keys[key].in_use = false;
550	cfa_pthread_keys[key].destructor = NULL;
551
552	// Remove key from all threads with a value.
553	pthread_values& p;
554	Sequence(pthread_values)& head = cfa_pthread_keys[key].threads;
555	for ( SeqIter(pthread_values) iter = { head }; iter \| p; ) {
556	remove(head, p);
557	p.in_use = false;
558	}
559	unlock(key_lock);
560	return 0;
561	} // pthread_key_delete
562
563	int pthread_setspecific( pthread_key_t key, const void * value ) libcfa_public __THROW {
564	// get current thread
565	cfaPthread * t = lookup(pthread_self());
566	// if current thread's pthreadData is NULL; initialize it
567	pthread_values * values;
568	if (t->pthreadData == NULL) {
569	values = anew( PTHREAD_KEYS_MAX);
570	t->pthreadData = values;
571	for ( int i = 0;i < PTHREAD_KEYS_MAX; i++ ) {
572	t->pthreadData[i].in_use = false;
573	} // for
574	} else {
575	values = t->pthreadData;
576	} // if
577	// find corresponding key and set value
578	lock(key_lock);
579	// if invalid key
580	if ( key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use ) {
581	unlock( key_lock );
582	return EINVAL;
583	} // if
584	pthread_values &entry = values[key];
585	if ( ! entry.in_use ) {
586	entry.in_use = true;
587	add(cfa_pthread_keys[key].threads, entry);
588	} // if
589	entry.value = (void *)value;
590	unlock(key_lock);
591	return 0;
592	} //pthread_setspecific
593
594	void * pthread_getspecific(pthread_key_t key) libcfa_public __THROW {
595	if (key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use) return NULL;
596
597	// get current thread
598	cfaPthread * t = lookup(pthread_self());
599	if (t->pthreadData == NULL) return NULL;
600	lock(key_lock);
601	pthread_values & entry = ((pthread_values *)t->pthreadData)[key];
602	if ( ! entry.in_use ) {
603	unlock( key_lock );
604	return NULL;
605	} // if
606	void * value = entry.value;
607	unlock(key_lock);
608
609	return value;
610	} //pthread_get_specific
611
612	//######################### Parallelism #########################
613	void pthread_delete_kernel_threads_() __THROW { // see uMain::~uMain
614	Pthread_kernel_threads& p;
615	for ( StackIter(Pthread_kernel_threads) iter = {cfa_pthreads_kernel_threads}; iter \| p; ) {
616	delete(&p);
617	} // for
618	} // pthread_delete_kernel_threads_
619
620	int pthread_getconcurrency( void ) __THROW { // XOPEN extension
621	return cfa_pthreads_kernel_threads_zero ? 0 : cfa_pthreads_no_kernel_threads;
622	} // pthread_getconcurrency
623
624	int pthread_setconcurrency( int new_level ) libcfa_public __THROW { // XOPEN extension
625	if ( new_level < 0 ) return EINVAL;
626	if ( new_level == 0 ) {
627	cfa_pthreads_kernel_threads_zero = true; // remember set to zero, but ignore
628	return 0; // do not do kernel thread management
629	} // exit
630	cfa_pthreads_kernel_threads_zero = false;
631	lock( concurrency_lock );
632	for ( ; new_level > cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads += 1 ) { // add processors ?
633	push(cfa_pthreads_kernel_threads, *new() );
634	} // for
635	for ( ; new_level < cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads -= 1 ) { // remove processors ?
636	delete(&pop(cfa_pthreads_kernel_threads));
637	} // for
638	unlock( concurrency_lock );
639	return 0;
640	} // pthread_setconcurrency
641
642	//######################### Signal #########################
643
644
645	int pthread_sigmask( int /* how /, const sigset_t /* set /, sigset_t /* oset */ ) libcfa_public __THROW {
646	abort( "pthread_sigmask : not implemented" );
647	return 0;
648	} // pthread_sigmask
649
650	int pthread_kill( pthread_t _thread __attribute__(( unused )), int sig ) libcfa_public __THROW {
651	if ( sig == 0 ) {
652	return 0;
653	} else {
654	abort( "pthread_kill : not implemented" );
655	} // if
656	return 0;
657	} // pthread_kill
658
659	int pthread_sigqueue(pthread_t , int sig, const union sigval) libcfa_public __THROW {
660	abort( "pthread_sigqueue : not implemented" );
661	return 0;
662	} // pthread_sigqueue
663
664	//######################### Scheduling #########################
665	int pthread_detach( pthread_t threadID ) __THROW {
666	abort( "pthread_detach : not implemented" );
667	return 0;
668	} // pthread_detach
669
670	int pthread_setschedparam( pthread_t /* thread /, int / policy /, const struct sched_param /* param */ ) libcfa_public __THROW {
671	abort( "pthread_setschedparam : not implemented" );
672	return 0;
673	} // pthread_setschedparam
674
675	int pthread_getschedparam( pthread_t /* thread /, int /* policy /, struct sched_param /* param */ ) libcfa_public __THROW {
676	abort( "pthread_getschedparam : not implemented" );
677	return 0;
678	} // pthread_getschedparam
679
680	//######################### Mutex Attr #########################
681
682	int pthread_mutexattr_init( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW {
683	return 0;
684	} // pthread_mutexattr_init
685
686	int pthread_mutexattr_destroy( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW {
687	return 0;
688	} // pthread_mutexattr_destroy
689
690	int pthread_mutexattr_setpshared( pthread_mutexattr_t * /* attr /, int / pshared */ ) libcfa_public __THROW {
691	return 0;
692	} // pthread_mutexattr_setpshared
693
694	int pthread_mutexattr_getpshared( const pthread_mutexattr_t * /* attr /, int /* pshared */ ) libcfa_public __THROW {
695	return 0;
696	} // pthread_mutexattr_getpshared
697
698	int pthread_mutexattr_setprotocol( pthread_mutexattr_t * /* attr /, int / protocol */ ) libcfa_public __THROW {
699	return 0;
700	} // pthread_mutexattr_setprotocol
701
702	int pthread_mutexattr_getprotocol( const pthread_mutexattr_t * /* attr /, int /* protocol */ ) libcfa_public __THROW {
703	return 0;
704	} // pthread_mutexattr_getprotocol
705
706	int pthread_mutexattr_setprioceiling( pthread_mutexattr_t * /* attr /, int / prioceiling */ ) libcfa_public __THROW {
707	return 0;
708	} // pthread_mutexattr_setprioceiling
709
710	int pthread_mutexattr_getprioceiling( const pthread_mutexattr_t * /* attr /, int /* ceiling */ ) libcfa_public __THROW {
711	return 0;
712	} // pthread_mutexattr_getprioceiling
713
714	int pthread_mutex_setprioceiling( pthread_mutex_t * /* mutex /, int / prioceiling /, int /* old_ceiling */ ) libcfa_public __THROW {
715	return 0;
716	} // pthread_mutex_setprioceiling
717
718	int pthread_mutex_getprioceiling( const pthread_mutex_t * /* mutex /, int /* ceiling */ ) libcfa_public __THROW {
719	return 0;
720	} // pthread_mutex_getprioceiling
721
722	int pthread_mutexattr_gettype( __const pthread_mutexattr_t * __restrict /* __attr /, int __restrict /* __kind */ ) libcfa_public __THROW {
723	return 0;
724	} // pthread_mutexattr_gettype
725
726	int pthread_mutexattr_settype( pthread_mutexattr_t * /* __attr /, int / __kind */ ) libcfa_public __THROW {
727	return 0;
728	} // pthread_mutexattr_settype
729
730	//######################### Mutex #########################
731
732	int pthread_mutex_timedlock( pthread_mutex_t __restrict / __mutex /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
733	abort( "pthread_mutex_timedlock" );
734	} // pthread_mutex_timedlock
735
736	//######################### Condition #########################
737
738	int pthread_condattr_getclock( __const pthread_condattr_t * __restrict /* __attr /, __clockid_t __restrict /* __clock_id */ ) libcfa_public __THROW {
739	abort( "pthread_condattr_getclock" );
740	} // pthread_condattr_getclock
741
742	int pthread_condattr_setclock( pthread_condattr_t * /* __attr /, __clockid_t / __clock_id */ ) libcfa_public __THROW {
743	abort( "pthread_condattr_setclock" );
744	} // pthread_condattr_setclock
745
746	//######################### Spinlock #########################
747
748	int pthread_spin_init( pthread_spinlock_t * /* __lock /, int /__pshared */ ) libcfa_public __THROW {
749	abort( "pthread_spin_init" );
750	} // pthread_spin_init
751
752	int pthread_spin_destroy( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
753	abort( "pthread_spin_destroy" );
754	} // pthread_spin_destroy
755
756	int pthread_spin_lock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
757	abort( "pthread_spin_lock" );
758	} // pthread_spin_lock
759
760	int pthread_spin_trylock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
761	abort( "pthread_spin_trylock" );
762	} // pthread_spin_trylock
763
764	int pthread_spin_unlock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
765	abort( "pthread_spin_unlock" );
766	} // pthread_spin_unlock
767
768	//######################### Barrier #########################
769
770	int pthread_barrier_init( pthread_barrier_t __restrict / __barrier /, __const pthread_barrierattr_t __restrict /* __attr /, unsigned int / __count */ ) libcfa_public __THROW {
771	abort( "pthread_barrier_init" );
772	} // pthread_barrier_init
773
774	int pthread_barrier_destroy( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW {
775	abort( "pthread_barrier_destroy" );
776	} // pthread_barrier_destroy
777
778	int pthread_barrier_wait( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW {
779	abort( "pthread_barrier_wait" );
780	} // pthread_barrier_wait
781
782	int pthread_barrierattr_init( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW {
783	abort( "pthread_barrierattr_init" );
784	} // pthread_barrierattr_init
785
786	int pthread_barrierattr_destroy( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW {
787	abort( "pthread_barrierattr_destroy" );
788	} // pthread_barrierattr_destroy
789
790	int pthread_barrierattr_getpshared( __const pthread_barrierattr_t * __restrict /* __attr /, int __restrict /* __pshared */ ) libcfa_public __THROW {
791	abort( "pthread_barrierattr_getpshared" );
792	} // pthread_barrierattr_getpshared
793
794	int pthread_barrierattr_setpshared( pthread_barrierattr_t * /* __attr /, int / __pshared */ ) libcfa_public __THROW {
795	abort( "pthread_barrierattr_setpshared" );
796	} // pthread_barrierattr_setpshared
797
798	//######################### Clock #########################
799
800	int pthread_getcpuclockid( pthread_t /* __thread_id /, __clockid_t /* __clock_id */ ) libcfa_public __THROW {
801	abort( "pthread_getcpuclockid" );
802	} // pthread_getcpuclockid
803
804	// pthread_atfork()
805
806	// UNIX98
807
808	//######################### Read/Write #########################
809
810	int pthread_rwlock_init( pthread_rwlock_t __restrict / __rwlock /, __const pthread_rwlockattr_t __restrict /* __attr */ ) libcfa_public __THROW {
811	abort( "pthread_rwlock_init" );
812	} // pthread_rwlock_init
813
814	int pthread_rwlock_destroy( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
815	abort( "pthread_rwlock_destroy" );
816	} // pthread_rwlock_destroy
817
818	int pthread_rwlock_rdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
819	abort( "pthread_rwlock_rdlock" );
820	} // pthread_rwlock_rdlock
821
822	int pthread_rwlock_tryrdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
823	abort( "pthread_rwlock_tryrdlock" );
824	} // pthread_rwlock_tryrdlock
825
826	int pthread_rwlock_wrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
827	abort( "pthread_rwlock_wrlock" );
828	} // pthread_rwlock_wrlock
829
830	int pthread_rwlock_trywrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
831	abort( "pthread_rwlock_trywrlock" );
832	} // pthread_rwlock_trywrlock
833
834	int pthread_rwlock_unlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
835	abort( "pthread_rwlock_unlock" );
836	} // pthread_rwlock_unlock
837
838	int pthread_rwlockattr_init( pthread_rwlockattr_t * /* __attr */ ) libcfa_public __THROW {
839	abort( "pthread_rwlockattr_init" );
840	} // pthread_rwlockattr_init
841
842	int pthread_rwlockattr_destroy( pthread_rwlockattr_t * /__attr / ) libcfa_public __THROW {
843	abort( "pthread_rwlockattr_destroy" );
844	} // pthread_rwlockattr_destroy
845
846	int pthread_rwlockattr_getpshared( __const pthread_rwlockattr_t * __restrict /* __attr /, int __restrict /* __pshared */ ) libcfa_public __THROW {
847	abort( "pthread_rwlockattr_getpshared" );
848	} // pthread_rwlockattr_getpshared
849
850	int pthread_rwlockattr_setpshared( pthread_rwlockattr_t * /* __attr /, int / __pshared */ ) libcfa_public __THROW {
851	abort( "pthread_rwlockattr_setpshared" );
852	} // pthread_rwlockattr_setpshared
853
854	int pthread_rwlockattr_getkind_np( __const pthread_rwlockattr_t * /* __attr /, int /* __pref */ ) libcfa_public __THROW {
855	abort( "pthread_rwlockattr_getkind_np" );
856	} // pthread_rwlockattr_getkind_np
857
858	int pthread_rwlockattr_setkind_np( pthread_rwlockattr_t * /* __attr /, int / __pref */ ) libcfa_public __THROW {
859	abort( "pthread_rwlockattr_setkind_np" );
860	} // pthread_rwlockattr_setkind_np
861
862	// UNIX98 + XOPEN
863
864	int pthread_rwlock_timedrdlock( pthread_rwlock_t __restrict / __rwlock /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
865	abort( "pthread_rwlock_timedrdlock" );
866	} // pthread_rwlock_timedrdlock
867
868	int pthread_rwlock_timedwrlock( pthread_rwlock_t __restrict / __rwlock /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
869	abort( "pthread_rwlock_timedwrlock" );
870	} // pthread_rwlock_timedwrlock
871
872	// GNU
873
874	//######################### Parallelism #########################
875
876	// int pthread_setaffinity_np( pthread_t /* __th /, size_t / __cpusetsize /, __const cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
877	// abort( "pthread_setaffinity_np" );
878	// } // pthread_setaffinity_np
879
880	// int pthread_getaffinity_np( pthread_t /* __th /, size_t / __cpusetsize /, cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
881	// abort( "pthread_getaffinity_np" );
882	// } // pthread_getaffinity_np
883
884	// int pthread_attr_setaffinity_np( pthread_attr_t * /* __attr /, size_t / __cpusetsize /, __const cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
885	// abort( "pthread_attr_setaffinity_np" );
886	// } // pthread_attr_setaffinity_np
887
888	// int pthread_attr_getaffinity_np( __const pthread_attr_t * /* __attr /, size_t / __cpusetsize /, cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
889	// abort( "pthread_attr_getaffinity_np" );
890	// } // pthread_attr_getaffinity_np
891
892	//######################### Cancellation #########################
893
894	void _pthread_cleanup_push_defer( struct _pthread_cleanup_buffer * /* __buffer /, void( /* __routine / )( void ), void * /* __arg */ ) libcfa_public __THROW {
895	abort( "_pthread_cleanup_push_defer" );
896	} // _pthread_cleanup_push_defer
897
898	void _pthread_cleanup_pop_restore( struct _pthread_cleanup_buffer * /* __buffer /, int / __execute */ ) libcfa_public __THROW {
899	abort( "_pthread_cleanup_pop_restore" );
900	} // _pthread_cleanup_pop_res
901
902	int pthread_cancel( pthread_t threadID ) libcfa_public __THROW {
903	abort("pthread cancel not implemented");
904	return 0;
905	} // pthread_cancel
906
907	int pthread_setcancelstate( int state, int * oldstate ) libcfa_public __THROW {
908	abort("pthread_setcancelstate not implemented");
909	return 0;
910	} // pthread_setcancelstate
911
912	int pthread_setcanceltype( int type, int * oldtype ) libcfa_public __THROW {
913	abort("pthread_setcanceltype not implemented");
914	return 0;
915	} // pthread_setcanceltype
916	} // extern "C"
917
918	#pragma GCC diagnostic pop

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