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pthread.cfa @ b3d794fc

ADTast-experimental

Last change on this file since b3d794fc was 8bd886e, checked in by Thierry Delisle <tdelisle@…>, 2 years ago
Some clean-up in pthread emulation
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	#define _GNU_SOURCE
18
19	#include <signal.h>
20	#include <pthread.h>
21	#include <errno.h>
22	#include "locks.hfa"
23	#include "bits/stack.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	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	} typedef cfaPthread_attr_t;
164
165	static const cfaPthread_attr_t default_attrs{
166	0,
167	0,
168	(size_t)65000,
169	(void *)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
372	int pthread_join(pthread_t _thread, void **value_ptr) libcfa_public __THROW {
373	// if thread is invalid
374	if (_thread == NULL) return EINVAL;
375	if (_thread == pthread_self()) return EDEADLK;
376
377	// get user thr pointer
378	cfaPthread* p = lookup(_thread);
379	try {
380	join(*p);
381	}
382	// if thread called pthread_exit
383	catchResume (ThreadCancelled(cfaPthread) * cancel) {}
384
385	// fetch result
386	if (value_ptr != NULL ) *value_ptr = p->joinval;
387	delete(p);
388	return 0;
389	}
390
391	int pthread_tryjoin_np(pthread_t _thread, void **value_ptr) libcfa_public __THROW {
392	// if thread is invalid
393	if (_thread == NULL) return EINVAL;
394	if (_thread == pthread_self()) return EDEADLK;
395
396	cfaPthread* p = lookup(_thread);
397
398	// thread not finished ?
399	if (!p->isTerminated) return EBUSY;
400
401	join( *p );
402
403	if (value_ptr != NULL ) *value_ptr = p->joinval;
404	delete(p);
405	return 0;
406	}
407
408	pthread_t pthread_self(void) libcfa_public __THROW {
409	return (pthread_t)((uintptr_t)active_thread() - (sizeof(cfaPthread) - sizeof(thread$)));
410	}
411
412	void pthread_exit(void * status) libcfa_public __THROW {
413	pthread_t pid = pthread_self();
414	cfaPthread* _thread = (cfaPthread*)pid;
415	_thread->joinval = status; // set return value
416	_thread->isTerminated = 1; // set terminated flag
417	cancel_stack((pthread_exit_exp){&exp_vt});
418	} //pthread_exit_
419
420	int pthread_yield( void ) __THROW { // GNU extension
421	yield();
422	return 0;
423	}
424
425
426	//######################### Mutex #########################
427
428	int pthread_mutex_init(pthread_mutex_t _mutex, const pthread_mutexattr_t attr) libcfa_public __THROW {
429	check_nonnull(_mutex);
430	init(_mutex);
431	return 0;
432	} //pthread_mutex_init_
433
434
435	int pthread_mutex_destroy(pthread_mutex_t *_mutex) libcfa_public __THROW {
436	check_nonnull(_mutex);
437	simple_owner_lock* _lock = get(_mutex);
438	if (_lock->owner != NULL){
439	return EBUSY;
440	}
441	destroy(_mutex);
442	return 0;
443	} //pthread_mutex_destroy_
444
445	int pthread_mutex_lock(pthread_mutex_t *_mutex) libcfa_public __THROW {
446	check_nonnull(_mutex);
447	mutex_check(_mutex);
448	simple_owner_lock* _lock = get(_mutex);
449	lock(*_lock);
450	return 0;
451	} //pthread_mutex_lock_
452
453	int pthread_mutex_unlock(pthread_mutex_t *_mutex) libcfa_public __THROW {
454	check_nonnull(_mutex);
455	simple_owner_lock* _lock = get(_mutex);
456	if (_lock->owner != active_thread()){
457	return EPERM;
458	} // current thread does not hold the mutex
459	unlock(*_lock);
460	return 0;
461	} //pthread_mutex_unlock_
462
463	int pthread_mutex_trylock(pthread_mutex_t *_mutex) libcfa_public __THROW {
464	check_nonnull(_mutex);
465	simple_owner_lock* _lock = get(_mutex);
466	if (_lock->owner != active_thread() && _lock->owner != NULL){
467	return EBUSY;
468	} // if mutex is owned
469	lock(*_lock);
470	return 0;
471	} //pthread_mutex_trylock_
472
473	//######################### Conditional Variable #########################
474
475	/* conditional variable routines */
476	int pthread_cond_init(pthread_cond_t cond, const pthread_condattr_t attr) libcfa_public __THROW {
477	check_nonnull(cond);
478	init(cond);
479	return 0;
480	} //pthread_cond_init
481
482	int pthread_cond_wait(pthread_cond_t cond, pthread_mutex_t _mutex) libcfa_public __THROW {
483	check_nonnull(_mutex);
484	check_nonnull(cond);
485	wait(get(cond), get(_mutex));
486	return 0;
487	} // pthread_cond_wait
488
489	int pthread_cond_timedwait(pthread_cond_t * cond, pthread_mutex_t * _mutex, const struct timespec * abstime) libcfa_public __THROW {
490	check_nonnull(_mutex);
491	check_nonnull(cond);
492	wait(get(cond), get(_mutex), *abstime);
493	return 0;
494	} // pthread_cond_timedwait
495
496	int pthread_cond_signal(pthread_cond_t *cond) libcfa_public __THROW {
497	check_nonnull(cond);
498	return notify_one(*get(cond));
499	} // pthread_cond_signal
500
501	int pthread_cond_broadcast(pthread_cond_t *cond) libcfa_public __THROW {
502	check_nonnull(cond);
503	return notify_all(*get(cond));
504	} // pthread_cond_broadcast
505
506	int pthread_cond_destroy(pthread_cond_t *cond) libcfa_public __THROW {
507	check_nonnull(cond);
508	destroy(cond);
509	return 0;
510	} // pthread_cond_destroy
511
512
513
514	//######################### Local storage #########################
515
516	int pthread_once(pthread_once_t once_control, void (init_routine)(void)) libcfa_public __THROW {
517	static_assert(sizeof(pthread_once_t) >= sizeof(int),"sizeof(pthread_once_t) < sizeof(int)");
518	check_nonnull(once_control);
519	check_nonnull(init_routine);
520	lock(once_lock);
521	if ( ((int )once_control) == 0 ) {
522	init_routine();
523	((int )once_control) = 1;
524	} // if
525	unlock(once_lock);
526	return 0;
527	} // pthread_once
528
529	int pthread_key_create( pthread_key_t key, void (destructor)( void * ) ) libcfa_public __THROW {
530	lock(key_lock);
531	for ( int i = 0; i < PTHREAD_KEYS_MAX; i += 1 ) {
532	if ( ! cfa_pthread_keys[i].in_use ) {
533	cfa_pthread_keys[i].in_use = true;
534	cfa_pthread_keys[i].destructor = destructor;
535	unlock( key_lock );
536	*key = i;
537	return 0;
538	} // if
539	} // for
540	unlock(key_lock);
541	return EAGAIN;
542	} // pthread_key_create
543
544	int pthread_key_delete( pthread_key_t key ) libcfa_public __THROW {
545	lock(key_lock);
546	if ( key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use ) {
547	unlock( key_lock );
548	return EINVAL;
549	} // if
550	cfa_pthread_keys[key].in_use = false;
551	cfa_pthread_keys[key].destructor = NULL;
552
553	// Remove key from all threads with a value.
554	pthread_values& p;
555	Sequence(pthread_values)& head = cfa_pthread_keys[key].threads;
556	for ( SeqIter(pthread_values) iter = { head }; iter \| p; ) {
557	remove(head, p);
558	p.in_use = false;
559	}
560	unlock(key_lock);
561	return 0;
562	} // pthread_key_delete
563
564	int pthread_setspecific( pthread_key_t key, const void *value ) libcfa_public __THROW {
565	// get current thread
566	cfaPthread* t = lookup(pthread_self());
567	// if current thread's pthreadData is NULL; initialize it
568	pthread_values* values;
569	if (t->pthreadData == NULL){
570	values = anew( PTHREAD_KEYS_MAX);
571	t->pthreadData = values;
572	for (int i = 0;i < PTHREAD_KEYS_MAX; i++){
573	t->pthreadData[i].in_use = false;
574	} // for
575	} else {
576	values = t->pthreadData;
577	} // if
578	// find corresponding key and set value
579	lock(key_lock);
580	// if invalid key
581	if ( key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use ) {
582	unlock( key_lock );
583	return EINVAL;
584	} // if
585	pthread_values &entry = values[key];
586	if ( ! entry.in_use ) {
587	entry.in_use = true;
588	add(cfa_pthread_keys[key].threads, entry);
589	} // if
590	entry.value = (void *)value;
591	unlock(key_lock);
592	return 0;
593	} //pthread_setspecific
594
595	void* pthread_getspecific(pthread_key_t key) libcfa_public __THROW {
596	if (key >= PTHREAD_KEYS_MAX \|\| ! cfa_pthread_keys[key].in_use) return NULL;
597
598	// get current thread
599	cfaPthread* t = lookup(pthread_self());
600	if (t->pthreadData == NULL) return NULL;
601	lock(key_lock);
602	pthread_values &entry = ((pthread_values *)t->pthreadData)[key];
603	if ( ! entry.in_use ) {
604	unlock( key_lock );
605	return NULL;
606	} // if
607	void *value = entry.value;
608	unlock(key_lock);
609
610	return value;
611	} //pthread_get_specific
612
613	//######################### Parallelism #########################
614	void pthread_delete_kernel_threads_() __THROW { // see uMain::~uMain
615	Pthread_kernel_threads& p;
616	for ( StackIter(Pthread_kernel_threads) iter = {cfa_pthreads_kernel_threads}; iter \| p; ) {
617	delete(&p);
618	} // for
619	} // pthread_delete_kernel_threads_
620
621	int pthread_getconcurrency( void ) __THROW { // XOPEN extension
622	return cfa_pthreads_kernel_threads_zero ? 0 : cfa_pthreads_no_kernel_threads;
623	} // pthread_getconcurrency
624
625	int pthread_setconcurrency( int new_level ) libcfa_public __THROW { // XOPEN extension
626	if ( new_level < 0 ) return EINVAL;
627	if ( new_level == 0 ) {
628	cfa_pthreads_kernel_threads_zero = true; // remember set to zero, but ignore
629	return 0; // do not do kernel thread management
630	} // exit
631	cfa_pthreads_kernel_threads_zero = false;
632	lock( concurrency_lock );
633	for ( ; new_level > cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads += 1 ) { // add processors ?
634	push(cfa_pthreads_kernel_threads, *new() );
635	} // for
636	for ( ; new_level < cfa_pthreads_no_kernel_threads; cfa_pthreads_no_kernel_threads -= 1 ) { // remove processors ?
637	delete(&pop(cfa_pthreads_kernel_threads));
638	} // for
639	unlock( concurrency_lock );
640	return 0;
641	} // pthread_setconcurrency
642
643	//######################### Signal #########################
644
645
646	int pthread_sigmask( int /* how /, const sigset_t /* set /, sigset_t /* oset */ ) libcfa_public __THROW {
647	abort( "pthread_sigmask : not implemented" );
648	return 0;
649	} // pthread_sigmask
650
651	int pthread_kill( pthread_t _thread __attribute__(( unused )), int sig ) libcfa_public __THROW {
652	if ( sig == 0 ) {
653	return 0;
654	} else {
655	abort( "pthread_kill : not implemented" );
656	} // if
657	return 0;
658	} // pthread_kill
659
660	int pthread_sigqueue(pthread_t , int sig, const union sigval) libcfa_public __THROW {
661	abort( "pthread_sigqueue : not implemented" );
662	return 0;
663	} // pthread_sigqueue
664
665	//######################### Scheduling #########################
666	int pthread_detach( pthread_t threadID ) __THROW {
667	abort( "pthread_detach : not implemented" );
668	return 0;
669	} // pthread_detach
670
671	int pthread_setschedparam( pthread_t /* thread /, int / policy /, const struct sched_param /* param */ ) libcfa_public __THROW {
672	abort( "pthread_setschedparam : not implemented" );
673	return 0;
674	} // pthread_setschedparam
675
676	int pthread_getschedparam( pthread_t /* thread /, int /* policy /, struct sched_param /* param */ ) libcfa_public __THROW {
677	abort( "pthread_getschedparam : not implemented" );
678	return 0;
679	} // pthread_getschedparam
680
681	//######################### Mutex Attr #########################
682
683	int pthread_mutexattr_init( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW {
684	return 0;
685	} // pthread_mutexattr_init
686
687	int pthread_mutexattr_destroy( pthread_mutexattr_t * /* attr */ ) libcfa_public __THROW {
688	return 0;
689	} // pthread_mutexattr_destroy
690
691	int pthread_mutexattr_setpshared( pthread_mutexattr_t * /* attr /, int / pshared */ ) libcfa_public __THROW {
692	return 0;
693	} // pthread_mutexattr_setpshared
694
695	int pthread_mutexattr_getpshared( const pthread_mutexattr_t * /* attr /, int /* pshared */ ) libcfa_public __THROW {
696	return 0;
697	} // pthread_mutexattr_getpshared
698
699	int pthread_mutexattr_setprotocol( pthread_mutexattr_t * /* attr /, int / protocol */ ) libcfa_public __THROW {
700	return 0;
701	} // pthread_mutexattr_setprotocol
702
703	int pthread_mutexattr_getprotocol( const pthread_mutexattr_t * /* attr /, int /* protocol */ ) libcfa_public __THROW {
704	return 0;
705	} // pthread_mutexattr_getprotocol
706
707	int pthread_mutexattr_setprioceiling( pthread_mutexattr_t * /* attr /, int / prioceiling */ ) libcfa_public __THROW {
708	return 0;
709	} // pthread_mutexattr_setprioceiling
710
711	int pthread_mutexattr_getprioceiling( const pthread_mutexattr_t * /* attr /, int /* ceiling */ ) libcfa_public __THROW {
712	return 0;
713	} // pthread_mutexattr_getprioceiling
714
715	int pthread_mutex_setprioceiling( pthread_mutex_t * /* mutex /, int / prioceiling /, int /* old_ceiling */ ) libcfa_public __THROW {
716	return 0;
717	} // pthread_mutex_setprioceiling
718
719	int pthread_mutex_getprioceiling( const pthread_mutex_t * /* mutex /, int /* ceiling */ ) libcfa_public __THROW {
720	return 0;
721	} // pthread_mutex_getprioceiling
722
723	int pthread_mutexattr_gettype( __const pthread_mutexattr_t * __restrict /* __attr /, int __restrict /* __kind */ ) libcfa_public __THROW {
724	return 0;
725	} // pthread_mutexattr_gettype
726
727	int pthread_mutexattr_settype( pthread_mutexattr_t * /* __attr /, int / __kind */ ) libcfa_public __THROW {
728	return 0;
729	} // pthread_mutexattr_settype
730
731	//######################### Mutex #########################
732
733	int pthread_mutex_timedlock( pthread_mutex_t __restrict / __mutex /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
734	abort( "pthread_mutex_timedlock" );
735	} // pthread_mutex_timedlock
736
737	//######################### Condition #########################
738
739	int pthread_condattr_getclock( __const pthread_condattr_t * __restrict /* __attr /, __clockid_t __restrict /* __clock_id */ ) libcfa_public __THROW {
740	abort( "pthread_condattr_getclock" );
741	} // pthread_condattr_getclock
742
743	int pthread_condattr_setclock( pthread_condattr_t * /* __attr /, __clockid_t / __clock_id */ ) libcfa_public __THROW {
744	abort( "pthread_condattr_setclock" );
745	} // pthread_condattr_setclock
746
747	//######################### Spinlock #########################
748
749	int pthread_spin_init( pthread_spinlock_t * /* __lock /, int /__pshared */ ) libcfa_public __THROW {
750	abort( "pthread_spin_init" );
751	} // pthread_spin_init
752
753	int pthread_spin_destroy( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
754	abort( "pthread_spin_destroy" );
755	} // pthread_spin_destroy
756
757	int pthread_spin_lock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
758	abort( "pthread_spin_lock" );
759	} // pthread_spin_lock
760
761	int pthread_spin_trylock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
762	abort( "pthread_spin_trylock" );
763	} // pthread_spin_trylock
764
765	int pthread_spin_unlock( pthread_spinlock_t * /* __lock */ ) libcfa_public __THROW {
766	abort( "pthread_spin_unlock" );
767	} // pthread_spin_unlock
768
769	//######################### Barrier #########################
770
771	int pthread_barrier_init( pthread_barrier_t __restrict / __barrier /, __const pthread_barrierattr_t __restrict /* __attr /, unsigned int / __count */ ) libcfa_public __THROW {
772	abort( "pthread_barrier_init" );
773	} // pthread_barrier_init
774
775	int pthread_barrier_destroy( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW {
776	abort( "pthread_barrier_destroy" );
777	} // pthread_barrier_destroy
778
779	int pthread_barrier_wait( pthread_barrier_t * /* __barrier */ ) libcfa_public __THROW {
780	abort( "pthread_barrier_wait" );
781	} // pthread_barrier_wait
782
783	int pthread_barrierattr_init( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW {
784	abort( "pthread_barrierattr_init" );
785	} // pthread_barrierattr_init
786
787	int pthread_barrierattr_destroy( pthread_barrierattr_t * /* __attr */ ) libcfa_public __THROW {
788	abort( "pthread_barrierattr_destroy" );
789	} // pthread_barrierattr_destroy
790
791	int pthread_barrierattr_getpshared( __const pthread_barrierattr_t * __restrict /* __attr /, int __restrict /* __pshared */ ) libcfa_public __THROW {
792	abort( "pthread_barrierattr_getpshared" );
793	} // pthread_barrierattr_getpshared
794
795	int pthread_barrierattr_setpshared( pthread_barrierattr_t * /* __attr /, int / __pshared */ ) libcfa_public __THROW {
796	abort( "pthread_barrierattr_setpshared" );
797	} // pthread_barrierattr_setpshared
798
799	//######################### Clock #########################
800
801	int pthread_getcpuclockid( pthread_t /* __thread_id /, __clockid_t /* __clock_id */ ) libcfa_public __THROW {
802	abort( "pthread_getcpuclockid" );
803	} // pthread_getcpuclockid
804
805	// pthread_atfork()
806
807	// UNIX98
808
809	//######################### Read/Write #########################
810
811	int pthread_rwlock_init( pthread_rwlock_t __restrict / __rwlock /, __const pthread_rwlockattr_t __restrict /* __attr */ ) libcfa_public __THROW {
812	abort( "pthread_rwlock_init" );
813	} // pthread_rwlock_init
814
815	int pthread_rwlock_destroy( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
816	abort( "pthread_rwlock_destroy" );
817	} // pthread_rwlock_destroy
818
819	int pthread_rwlock_rdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
820	abort( "pthread_rwlock_rdlock" );
821	} // pthread_rwlock_rdlock
822
823	int pthread_rwlock_tryrdlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
824	abort( "pthread_rwlock_tryrdlock" );
825	} // pthread_rwlock_tryrdlock
826
827	int pthread_rwlock_wrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
828	abort( "pthread_rwlock_wrlock" );
829	} // pthread_rwlock_wrlock
830
831	int pthread_rwlock_trywrlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
832	abort( "pthread_rwlock_trywrlock" );
833	} // pthread_rwlock_trywrlock
834
835	int pthread_rwlock_unlock( pthread_rwlock_t * /* __rwlock */ ) libcfa_public __THROW {
836	abort( "pthread_rwlock_unlock" );
837	} // pthread_rwlock_unlock
838
839	int pthread_rwlockattr_init( pthread_rwlockattr_t * /* __attr */ ) libcfa_public __THROW {
840	abort( "pthread_rwlockattr_init" );
841	} // pthread_rwlockattr_init
842
843	int pthread_rwlockattr_destroy( pthread_rwlockattr_t * /__attr / ) libcfa_public __THROW {
844	abort( "pthread_rwlockattr_destroy" );
845	} // pthread_rwlockattr_destroy
846
847	int pthread_rwlockattr_getpshared( __const pthread_rwlockattr_t * __restrict /* __attr /, int __restrict /* __pshared */ ) libcfa_public __THROW {
848	abort( "pthread_rwlockattr_getpshared" );
849	} // pthread_rwlockattr_getpshared
850
851	int pthread_rwlockattr_setpshared( pthread_rwlockattr_t * /* __attr /, int / __pshared */ ) libcfa_public __THROW {
852	abort( "pthread_rwlockattr_setpshared" );
853	} // pthread_rwlockattr_setpshared
854
855	int pthread_rwlockattr_getkind_np( __const pthread_rwlockattr_t * /* __attr /, int /* __pref */ ) libcfa_public __THROW {
856	abort( "pthread_rwlockattr_getkind_np" );
857	} // pthread_rwlockattr_getkind_np
858
859	int pthread_rwlockattr_setkind_np( pthread_rwlockattr_t * /* __attr /, int / __pref */ ) libcfa_public __THROW {
860	abort( "pthread_rwlockattr_setkind_np" );
861	} // pthread_rwlockattr_setkind_np
862
863	// UNIX98 + XOPEN
864
865	int pthread_rwlock_timedrdlock( pthread_rwlock_t __restrict / __rwlock /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
866	abort( "pthread_rwlock_timedrdlock" );
867	} // pthread_rwlock_timedrdlock
868
869	int pthread_rwlock_timedwrlock( pthread_rwlock_t __restrict / __rwlock /, __const struct timespec __restrict /* __abstime */ ) libcfa_public __THROW {
870	abort( "pthread_rwlock_timedwrlock" );
871	} // pthread_rwlock_timedwrlock
872
873	// GNU
874
875	//######################### Parallelism #########################
876
877	int pthread_setaffinity_np( pthread_t /* __th /, size_t / __cpusetsize /, __const cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
878	abort( "pthread_setaffinity_np" );
879	} // pthread_setaffinity_np
880
881	int pthread_getaffinity_np( pthread_t /* __th /, size_t / __cpusetsize /, cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
882	abort( "pthread_getaffinity_np" );
883	} // pthread_getaffinity_np
884
885	int pthread_attr_setaffinity_np( pthread_attr_t * /* __attr /, size_t / __cpusetsize /, __const cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
886	abort( "pthread_attr_setaffinity_np" );
887	} // pthread_attr_setaffinity_np
888
889	int pthread_attr_getaffinity_np( __const pthread_attr_t * /* __attr /, size_t / __cpusetsize /, cpu_set_t /* __cpuset */ ) libcfa_public __THROW {
890	abort( "pthread_attr_getaffinity_np" );
891	} // pthread_attr_getaffinity_np
892
893	//######################### Cancellation #########################
894
895	void _pthread_cleanup_push_defer( struct _pthread_cleanup_buffer * /* __buffer /, void( /* __routine / )( void ), void * /* __arg */ ) libcfa_public __THROW {
896	abort( "_pthread_cleanup_push_defer" );
897	} // _pthread_cleanup_push_defer
898
899	void _pthread_cleanup_pop_restore( struct _pthread_cleanup_buffer * /* __buffer /, int / __execute */ ) libcfa_public __THROW {
900	abort( "_pthread_cleanup_pop_restore" );
901	} // _pthread_cleanup_pop_res
902
903	int pthread_cancel( pthread_t threadID ) libcfa_public __THROW {
904	abort("pthread cancel not implemented");
905	return 0;
906	} // pthread_cancel
907
908	int pthread_setcancelstate( int state, int *oldstate ) libcfa_public __THROW {
909	abort("pthread_setcancelstate not implemented");
910	return 0;
911	} // pthread_setcancelstate
912
913	int pthread_setcanceltype( int type, int *oldtype ) libcfa_public __THROW {
914	abort("pthread_setcanceltype not implemented");
915	return 0;
916	} // pthread_setcanceltype
917	} // extern "C"
918
919	#pragma GCC diagnostic pop
920

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