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pthread.cfa @ ed52dd5

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Last change on this file since ed52dd5 was f5f2768, checked in by Peter A. Buhr <pabuhr@…>, 18 months ago
make _GNU_SOURCE default, change IO to use SOCKADDR_ARG and CONST_SOCKADDR_ARG, move sys/socket.h to first include because of anonymous naming problem
Property mode set to `100644`
File size: 30.5 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 :
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	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	} typedef cfaPthread_attr_t;
163
164	static const cfaPthread_attr_t default_attrs{
165	0,
166	0,
167	(size_t)65000,
168	(void *)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
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
919

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