michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <kernel/OS.h>
michael@0: #include <support/TLS.h>
michael@0: 
michael@0: #include "prlog.h"
michael@0: #include "primpl.h"
michael@0: #include "prcvar.h"
michael@0: #include "prpdce.h"
michael@0: 
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: #include <signal.h>
michael@0: 
michael@0: /* values for PRThread.state */
michael@0: #define BT_THREAD_PRIMORD   0x01    /* this is the primordial thread */
michael@0: #define BT_THREAD_SYSTEM    0x02    /* this is a system thread */
michael@0: #define BT_THREAD_JOINABLE  0x04	/* this is a joinable thread */
michael@0: 
michael@0: struct _BT_Bookeeping
michael@0: {
michael@0:     PRLock *ml;                 /* a lock to protect ourselves */
michael@0: 	sem_id cleanUpSem;		/* the primoridal thread will block on this
michael@0: 							   sem while waiting for the user threads */
michael@0:     PRInt32 threadCount;	/* user thred count */
michael@0: 
michael@0: } bt_book = { NULL, B_ERROR, 0 };
michael@0: 
michael@0: 
michael@0: #define BT_TPD_LIMIT 128	/* number of TPD slots we'll provide (arbitrary) */
michael@0: 
michael@0: /* these will be used to map an index returned by PR_NewThreadPrivateIndex()
michael@0:    to the corresponding beos native TLS slot number, and to the destructor
michael@0:    for that slot - note that, because it is allocated globally, this data
michael@0:    will be automatically zeroed for us when the program begins */
michael@0: static int32 tpd_beosTLSSlots[BT_TPD_LIMIT];
michael@0: static PRThreadPrivateDTOR tpd_dtors[BT_TPD_LIMIT];
michael@0: 
michael@0: static vint32 tpd_slotsUsed=0;	/* number of currently-allocated TPD slots */
michael@0: static int32 tls_prThreadSlot;	/* TLS slot in which PRThread will be stored */
michael@0: 
michael@0: /* this mutex will be used to synchronize access to every
michael@0:    PRThread.md.joinSem and PRThread.md.is_joining (we could
michael@0:    actually allocate one per thread, but that seems a bit excessive,
michael@0:    especially considering that there will probably be little
michael@0:    contention, PR_JoinThread() is allowed to block anyway, and the code
michael@0:    protected by the mutex is short/fast) */
michael@0: static PRLock *joinSemLock;
michael@0: 
michael@0: static PRUint32 _bt_MapNSPRToNativePriority( PRThreadPriority priority );
michael@0: static PRThreadPriority _bt_MapNativeToNSPRPriority( PRUint32 priority );
michael@0: static void _bt_CleanupThread(void *arg);
michael@0: static PRThread *_bt_AttachThread();
michael@0: 
michael@0: void
michael@0: _PR_InitThreads (PRThreadType type, PRThreadPriority priority,
michael@0:                  PRUintn maxPTDs)
michael@0: {
michael@0:     PRThread *primordialThread;
michael@0:     PRUint32  beThreadPriority;
michael@0: 
michael@0: 	/* allocate joinSem mutex */
michael@0: 	joinSemLock = PR_NewLock();
michael@0: 	if (joinSemLock == NULL)
michael@0: 	{
michael@0: 		PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
michael@0: 		return;
michael@0:     }
michael@0: 
michael@0:     /*
michael@0:     ** Create and initialize NSPR structure for our primordial thread.
michael@0:     */
michael@0:     
michael@0:     primordialThread = PR_NEWZAP(PRThread);
michael@0:     if( NULL == primordialThread )
michael@0:     {
michael@0:         PR_SetError( PR_OUT_OF_MEMORY_ERROR, 0 );
michael@0:         return;
michael@0:     }
michael@0: 
michael@0: 	primordialThread->md.joinSem = B_ERROR;
michael@0: 
michael@0:     /*
michael@0:     ** Set the priority to the desired level.
michael@0:     */
michael@0: 
michael@0:     beThreadPriority = _bt_MapNSPRToNativePriority( priority );
michael@0:     
michael@0:     set_thread_priority( find_thread( NULL ), beThreadPriority );
michael@0:     
michael@0:     primordialThread->priority = priority;
michael@0: 
michael@0: 
michael@0: 	/* set the thread's state - note that the thread is not joinable */
michael@0:     primordialThread->state |= BT_THREAD_PRIMORD;
michael@0: 	if (type == PR_SYSTEM_THREAD)
michael@0: 		primordialThread->state |= BT_THREAD_SYSTEM;
michael@0: 
michael@0:     /*
michael@0:     ** Allocate a TLS slot for the PRThread structure (just using
michael@0:     ** native TLS, as opposed to NSPR TPD, will make PR_GetCurrentThread()
michael@0:     ** somewhat faster, and will leave one more TPD slot for our client)
michael@0:     */
michael@0: 	
michael@0: 	tls_prThreadSlot = tls_allocate();
michael@0: 
michael@0:     /*
michael@0:     ** Stuff our new PRThread structure into our thread specific
michael@0:     ** slot.
michael@0:     */
michael@0: 
michael@0: 	tls_set(tls_prThreadSlot, primordialThread);
michael@0:     
michael@0: 	/* allocate lock for bt_book */
michael@0:     bt_book.ml = PR_NewLock();
michael@0:     if( NULL == bt_book.ml )
michael@0:     {
michael@0:     	PR_SetError( PR_OUT_OF_MEMORY_ERROR, 0 );
michael@0: 	return;
michael@0:     }
michael@0: }
michael@0: 
michael@0: PRUint32
michael@0: _bt_MapNSPRToNativePriority( PRThreadPriority priority )
michael@0:     {
michael@0:     switch( priority )
michael@0:     {
michael@0:     	case PR_PRIORITY_LOW:	 return( B_LOW_PRIORITY );
michael@0: 	case PR_PRIORITY_NORMAL: return( B_NORMAL_PRIORITY );
michael@0: 	case PR_PRIORITY_HIGH:	 return( B_DISPLAY_PRIORITY );
michael@0: 	case PR_PRIORITY_URGENT: return( B_URGENT_DISPLAY_PRIORITY );
michael@0: 	default:		 return( B_NORMAL_PRIORITY );
michael@0:     }
michael@0: }
michael@0: 
michael@0: PRThreadPriority
michael@0: _bt_MapNativeToNSPRPriority(PRUint32 priority)
michael@0:     {
michael@0: 	if (priority < B_NORMAL_PRIORITY)
michael@0: 		return PR_PRIORITY_LOW;
michael@0: 	if (priority < B_DISPLAY_PRIORITY)
michael@0: 		return PR_PRIORITY_NORMAL;
michael@0: 	if (priority < B_URGENT_DISPLAY_PRIORITY)
michael@0: 		return PR_PRIORITY_HIGH;
michael@0: 	return PR_PRIORITY_URGENT;
michael@0: }
michael@0: 
michael@0: PRUint32
michael@0: _bt_mapNativeToNSPRPriority( int32 priority )
michael@0: {
michael@0:     switch( priority )
michael@0:     {
michael@0:     	case PR_PRIORITY_LOW:	 return( B_LOW_PRIORITY );
michael@0: 	case PR_PRIORITY_NORMAL: return( B_NORMAL_PRIORITY );
michael@0: 	case PR_PRIORITY_HIGH:	 return( B_DISPLAY_PRIORITY );
michael@0: 	case PR_PRIORITY_URGENT: return( B_URGENT_DISPLAY_PRIORITY );
michael@0: 	default:		 return( B_NORMAL_PRIORITY );
michael@0:     }
michael@0: }
michael@0: 
michael@0: /* This method is called by all NSPR threads as they exit */
michael@0: void _bt_CleanupThread(void *arg)
michael@0: {
michael@0: 	PRThread *me = PR_GetCurrentThread();
michael@0: 	int32 i;
michael@0: 
michael@0: 	/* first, clean up all thread-private data */
michael@0: 	for (i = 0; i < tpd_slotsUsed; i++)
michael@0: 	{
michael@0: 		void *oldValue = tls_get(tpd_beosTLSSlots[i]);
michael@0: 		if ( oldValue != NULL && tpd_dtors[i] != NULL )
michael@0: 			(*tpd_dtors[i])(oldValue);
michael@0: 	}
michael@0: 
michael@0: 	/* if this thread is joinable, wait for someone to join it */
michael@0: 	if (me->state & BT_THREAD_JOINABLE)
michael@0: 	{
michael@0: 		/* protect access to our joinSem */
michael@0: 		PR_Lock(joinSemLock);
michael@0: 
michael@0: 		if (me->md.is_joining)
michael@0: 		{
michael@0: 			/* someone is already waiting to join us (they've
michael@0: 			   allocated a joinSem for us) - let them know we're
michael@0: 			   ready */
michael@0: 			delete_sem(me->md.joinSem);
michael@0: 
michael@0: 			PR_Unlock(joinSemLock);
michael@0: 
michael@0: 		}
michael@0: 		else
michael@0:     {
michael@0: 			/* noone is currently waiting for our demise - it
michael@0: 			   is our responsibility to allocate the joinSem
michael@0: 			   and block on it */
michael@0: 			me->md.joinSem = create_sem(0, "join sem");
michael@0: 
michael@0: 			/* we're done accessing our joinSem */
michael@0: 			PR_Unlock(joinSemLock);
michael@0: 
michael@0: 			/* wait for someone to join us */
michael@0: 			while (acquire_sem(me->md.joinSem) == B_INTERRUPTED);
michael@0: 	    }
michael@0: 	}
michael@0: 
michael@0: 	/* if this is a user thread, we must update our books */
michael@0: 	if ((me->state & BT_THREAD_SYSTEM) == 0)
michael@0: 	{
michael@0: 		/* synchronize access to bt_book */
michael@0:     PR_Lock( bt_book.ml );
michael@0: 
michael@0: 		/* decrement the number of currently-alive user threads */
michael@0: 	bt_book.threadCount--;
michael@0: 
michael@0: 		if (bt_book.threadCount == 0 && bt_book.cleanUpSem != B_ERROR) {
michael@0: 			/* we are the last user thread, and the primordial thread is
michael@0: 			   blocked in PR_Cleanup() waiting for us to finish - notify
michael@0: 			   it */
michael@0: 			delete_sem(bt_book.cleanUpSem);
michael@0: 	}
michael@0: 
michael@0:     PR_Unlock( bt_book.ml );
michael@0: 	}
michael@0: 
michael@0: 	/* finally, delete this thread's PRThread */
michael@0: 	PR_DELETE(me);
michael@0: }
michael@0: 
michael@0: /**
michael@0:  * This is a wrapper that all threads invoke that allows us to set some
michael@0:  * things up prior to a thread's invocation and clean up after a thread has
michael@0:  * exited.
michael@0:  */
michael@0: static void*
michael@0: _bt_root (void* arg)
michael@0: 	{
michael@0:     PRThread *thred = (PRThread*)arg;
michael@0:     PRIntn rv;
michael@0:     void *privData;
michael@0:     status_t result;
michael@0:     int i;
michael@0: 
michael@0: 	/* save our PRThread object into our TLS */
michael@0: 	tls_set(tls_prThreadSlot, thred);
michael@0: 
michael@0:     thred->startFunc(thred->arg);  /* run the dang thing */
michael@0: 
michael@0: 	/* clean up */
michael@0: 	_bt_CleanupThread(NULL);
michael@0: 
michael@0: 	return 0;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRThread*)
michael@0:     PR_CreateThread (PRThreadType type, void (*start)(void* arg), void* arg,
michael@0:                      PRThreadPriority priority, PRThreadScope scope,
michael@0:                      PRThreadState state, PRUint32 stackSize)
michael@0: {
michael@0:     PRUint32 bePriority;
michael@0: 
michael@0:     PRThread* thred;
michael@0: 
michael@0:     if (!_pr_initialized) _PR_ImplicitInitialization();
michael@0: 
michael@0: 	thred = PR_NEWZAP(PRThread);
michael@0:  	if (thred == NULL)
michael@0: 	{
michael@0:         PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     thred->md.joinSem = B_ERROR;
michael@0: 
michael@0:         thred->arg = arg;
michael@0:         thred->startFunc = start;
michael@0:         thred->priority = priority;
michael@0: 
michael@0: 	if( state == PR_JOINABLE_THREAD )
michael@0: 	{
michael@0: 	    thred->state |= BT_THREAD_JOINABLE;
michael@0: 	}
michael@0: 
michael@0:         /* keep some books */
michael@0: 
michael@0: 	PR_Lock( bt_book.ml );
michael@0: 
michael@0: 	if (type == PR_USER_THREAD)
michael@0: 	{
michael@0: 	    bt_book.threadCount++;
michael@0:         }
michael@0: 
michael@0: 	PR_Unlock( bt_book.ml );
michael@0: 
michael@0: 	bePriority = _bt_MapNSPRToNativePriority( priority );
michael@0: 
michael@0:         thred->md.tid = spawn_thread((thread_func)_bt_root, "moz-thread",
michael@0:                                      bePriority, thred);
michael@0:         if (thred->md.tid < B_OK) {
michael@0:             PR_SetError(PR_UNKNOWN_ERROR, thred->md.tid);
michael@0:             PR_DELETE(thred);
michael@0: 			return NULL;
michael@0:         }
michael@0: 
michael@0:         if (resume_thread(thred->md.tid) < B_OK) {
michael@0:             PR_SetError(PR_UNKNOWN_ERROR, 0);
michael@0:             PR_DELETE(thred);
michael@0: 			return NULL;
michael@0:         }
michael@0: 
michael@0:     return thred;
michael@0:     }
michael@0: 
michael@0: PR_IMPLEMENT(PRThread*)
michael@0: 	PR_AttachThread(PRThreadType type, PRThreadPriority priority,
michael@0: 					PRThreadStack *stack)
michael@0: {
michael@0: 	/* PR_GetCurrentThread() will attach a thread if necessary */
michael@0: 	return PR_GetCurrentThread();
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(void)
michael@0: 	PR_DetachThread()
michael@0: {
michael@0: 	/* we don't support detaching */
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRStatus)
michael@0:     PR_JoinThread (PRThread* thred)
michael@0: {
michael@0:     status_t eval, status;
michael@0: 
michael@0:     PR_ASSERT(thred != NULL);
michael@0: 
michael@0: 	if ((thred->state & BT_THREAD_JOINABLE) == 0)
michael@0:     {
michael@0: 	PR_SetError( PR_INVALID_ARGUMENT_ERROR, 0 );
michael@0: 	return( PR_FAILURE );
michael@0:     }
michael@0: 
michael@0: 	/* synchronize access to the thread's joinSem */
michael@0: 	PR_Lock(joinSemLock);
michael@0: 	
michael@0: 	if (thred->md.is_joining)
michael@0: 	{
michael@0: 		/* another thread is already waiting to join the specified
michael@0: 		   thread - we must fail */
michael@0: 		PR_Unlock(joinSemLock);
michael@0: 		return PR_FAILURE;
michael@0: 	}
michael@0: 
michael@0: 	/* let others know we are waiting to join */
michael@0: 	thred->md.is_joining = PR_TRUE;
michael@0: 
michael@0: 	if (thred->md.joinSem == B_ERROR)
michael@0: 	{
michael@0: 		/* the thread hasn't finished yet - it is our responsibility to
michael@0: 		   allocate a joinSem and wait on it */
michael@0: 		thred->md.joinSem = create_sem(0, "join sem");
michael@0: 
michael@0: 		/* we're done changing the joinSem now */
michael@0: 		PR_Unlock(joinSemLock);
michael@0: 
michael@0: 		/* wait for the thread to finish */
michael@0: 		while (acquire_sem(thred->md.joinSem) == B_INTERRUPTED);
michael@0: 
michael@0: 	}
michael@0: 	else
michael@0: 	{
michael@0: 		/* the thread has already finished, and has allocated the
michael@0: 		   joinSem itself - let it know it can finally die */
michael@0: 		delete_sem(thred->md.joinSem);
michael@0: 		
michael@0: 		PR_Unlock(joinSemLock);
michael@0:     }
michael@0: 
michael@0: 	/* make sure the thread is dead */
michael@0:     wait_for_thread(thred->md.tid, &eval);
michael@0: 
michael@0:     return PR_SUCCESS;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRThread*)
michael@0:     PR_GetCurrentThread ()
michael@0: {
michael@0:     PRThread* thred;
michael@0: 
michael@0:     if (!_pr_initialized) _PR_ImplicitInitialization();
michael@0: 
michael@0:     thred = (PRThread *)tls_get( tls_prThreadSlot);
michael@0: 	if (thred == NULL)
michael@0: 	{
michael@0: 		/* this thread doesn't have a PRThread structure (it must be
michael@0: 		   a native thread not created by the NSPR) - assimilate it */
michael@0: 		thred = _bt_AttachThread();
michael@0: 	}
michael@0:     PR_ASSERT(NULL != thred);
michael@0: 
michael@0:     return thred;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRThreadScope)
michael@0:     PR_GetThreadScope (const PRThread* thred)
michael@0: {
michael@0:     PR_ASSERT(thred != NULL);
michael@0:     return PR_GLOBAL_THREAD;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRThreadType)
michael@0:     PR_GetThreadType (const PRThread* thred)
michael@0: {
michael@0:     PR_ASSERT(thred != NULL);
michael@0:     return (thred->state & BT_THREAD_SYSTEM) ?
michael@0:         PR_SYSTEM_THREAD : PR_USER_THREAD;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRThreadState)
michael@0:     PR_GetThreadState (const PRThread* thred)
michael@0: {
michael@0:     PR_ASSERT(thred != NULL);
michael@0:     return (thred->state & BT_THREAD_JOINABLE)?
michael@0:     					PR_JOINABLE_THREAD: PR_UNJOINABLE_THREAD;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRThreadPriority)
michael@0:     PR_GetThreadPriority (const PRThread* thred)
michael@0: {
michael@0:     PR_ASSERT(thred != NULL);
michael@0:     return thred->priority;
michael@0: }  /* PR_GetThreadPriority */
michael@0: 
michael@0: PR_IMPLEMENT(void) PR_SetThreadPriority(PRThread *thred,
michael@0:                                         PRThreadPriority newPri)
michael@0: {
michael@0:     PRUint32 bePriority;
michael@0: 
michael@0:     PR_ASSERT( thred != NULL );
michael@0: 
michael@0:     thred->priority = newPri;
michael@0:     bePriority = _bt_MapNSPRToNativePriority( newPri );
michael@0:     set_thread_priority( thred->md.tid, bePriority );
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRStatus)
michael@0:     PR_NewThreadPrivateIndex (PRUintn* newIndex,
michael@0:                               PRThreadPrivateDTOR destructor)
michael@0: {
michael@0: 	int32    index;
michael@0: 
michael@0:     if (!_pr_initialized) _PR_ImplicitInitialization();
michael@0: 
michael@0: 	/* reserve the next available tpd slot */
michael@0: 	index = atomic_add( &tpd_slotsUsed, 1 );
michael@0: 	if (index >= BT_TPD_LIMIT)
michael@0: 	{
michael@0: 		/* no slots left - decrement value, then fail */
michael@0: 		atomic_add( &tpd_slotsUsed, -1 );
michael@0: 		PR_SetError( PR_TPD_RANGE_ERROR, 0 );
michael@0: 	    return( PR_FAILURE );
michael@0: 	}
michael@0: 
michael@0: 	/* allocate a beos-native TLS slot for this index (the new slot
michael@0: 	   automatically contains NULL) */
michael@0: 	tpd_beosTLSSlots[index] = tls_allocate();
michael@0: 
michael@0: 	/* remember the destructor */
michael@0: 	tpd_dtors[index] = destructor;
michael@0: 
michael@0:     *newIndex = (PRUintn)index;
michael@0: 
michael@0:     return( PR_SUCCESS );
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRStatus)
michael@0:     PR_SetThreadPrivate (PRUintn index, void* priv)
michael@0: {
michael@0: 	void *oldValue;
michael@0: 
michael@0:     /*
michael@0:     ** Sanity checking
michael@0:     */
michael@0: 
michael@0:     if(index < 0 || index >= tpd_slotsUsed || index >= BT_TPD_LIMIT)
michael@0:     {
michael@0: 		PR_SetError( PR_TPD_RANGE_ERROR, 0 );
michael@0: 	return( PR_FAILURE );
michael@0:     }
michael@0: 
michael@0: 	/* if the old value isn't NULL, and the dtor for this slot isn't
michael@0: 	   NULL, we must destroy the data */
michael@0: 	oldValue = tls_get(tpd_beosTLSSlots[index]);
michael@0: 	if (oldValue != NULL && tpd_dtors[index] != NULL)
michael@0: 		(*tpd_dtors[index])(oldValue);
michael@0: 
michael@0: 	/* save new value */
michael@0: 	tls_set(tpd_beosTLSSlots[index], priv);
michael@0: 
michael@0: 	    return( PR_SUCCESS );
michael@0: 	}
michael@0: 
michael@0: PR_IMPLEMENT(void*)
michael@0:     PR_GetThreadPrivate (PRUintn index)
michael@0: {
michael@0: 	/* make sure the index is valid */
michael@0: 	if (index < 0 || index >= tpd_slotsUsed || index >= BT_TPD_LIMIT)
michael@0:     {   
michael@0: 		PR_SetError( PR_TPD_RANGE_ERROR, 0 );
michael@0: 		return NULL;
michael@0:     }
michael@0: 
michael@0: 	/* return the value */
michael@0: 	return tls_get( tpd_beosTLSSlots[index] );
michael@0: 	}
michael@0: 
michael@0: 
michael@0: PR_IMPLEMENT(PRStatus)
michael@0:     PR_Interrupt (PRThread* thred)
michael@0: {
michael@0:     PRIntn rv;
michael@0: 
michael@0:     PR_ASSERT(thred != NULL);
michael@0: 
michael@0:     /*
michael@0:     ** there seems to be a bug in beos R5 in which calling
michael@0:     ** resume_thread() on a blocked thread returns B_OK instead
michael@0:     ** of B_BAD_THREAD_STATE (beos bug #20000422-19095).  as such,
michael@0:     ** to interrupt a thread, we will simply suspend then resume it
michael@0:     ** (no longer call resume_thread(), check for B_BAD_THREAD_STATE,
michael@0:     ** the suspend/resume to wake up a blocked thread).  this wakes
michael@0:     ** up blocked threads properly, and doesn't hurt unblocked threads
michael@0:     ** (they simply get stopped then re-started immediately)
michael@0:     */
michael@0: 
michael@0:     rv = suspend_thread( thred->md.tid );
michael@0:     if( rv != B_NO_ERROR )
michael@0:     {
michael@0:         /* this doesn't appear to be a valid thread_id */
michael@0:         PR_SetError( PR_UNKNOWN_ERROR, rv );
michael@0:         return PR_FAILURE;
michael@0:     }
michael@0: 
michael@0:     rv = resume_thread( thred->md.tid );
michael@0:     if( rv != B_NO_ERROR )
michael@0:     {
michael@0:         PR_SetError( PR_UNKNOWN_ERROR, rv );
michael@0:         return PR_FAILURE;
michael@0:     }
michael@0: 
michael@0:     return PR_SUCCESS;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(void)
michael@0:     PR_ClearInterrupt ()
michael@0: {
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRStatus)
michael@0:     PR_Yield ()
michael@0: {
michael@0:     /* we just sleep for long enough to cause a reschedule (100
michael@0:        microseconds) */
michael@0:     snooze(100);
michael@0: }
michael@0: 
michael@0: #define BT_MILLION 1000000UL
michael@0: 
michael@0: PR_IMPLEMENT(PRStatus)
michael@0:     PR_Sleep (PRIntervalTime ticks)
michael@0: {
michael@0:     bigtime_t tps;
michael@0:     status_t status;
michael@0: 
michael@0:     if (!_pr_initialized) _PR_ImplicitInitialization();
michael@0: 
michael@0:     tps = PR_IntervalToMicroseconds( ticks );
michael@0: 
michael@0:     status = snooze(tps);
michael@0:     if (status == B_NO_ERROR) return PR_SUCCESS;
michael@0: 
michael@0:     PR_SetError(PR_NOT_IMPLEMENTED_ERROR, status);
michael@0:     return PR_FAILURE;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(PRStatus)
michael@0:     PR_Cleanup ()
michael@0: {
michael@0:     PRThread *me = PR_GetCurrentThread();
michael@0: 
michael@0:     PR_ASSERT(me->state & BT_THREAD_PRIMORD);
michael@0:     if ((me->state & BT_THREAD_PRIMORD) == 0) {
michael@0:         return PR_FAILURE;
michael@0:     }
michael@0: 
michael@0:     PR_Lock( bt_book.ml );
michael@0: 
michael@0: 	if (bt_book.threadCount != 0)
michael@0:     {
michael@0: 		/* we'll have to wait for some threads to finish - create a
michael@0: 		   sem to block on */
michael@0: 		bt_book.cleanUpSem = create_sem(0, "cleanup sem");
michael@0:     }
michael@0: 
michael@0:     PR_Unlock( bt_book.ml );
michael@0: 
michael@0: 	/* note that, if all the user threads were already dead, we
michael@0: 	   wouldn't have created a sem above, so this acquire_sem()
michael@0: 	   will fail immediately */
michael@0: 	while (acquire_sem(bt_book.cleanUpSem) == B_INTERRUPTED);
michael@0: 
michael@0:     return PR_SUCCESS;
michael@0: }
michael@0: 
michael@0: PR_IMPLEMENT(void)
michael@0:     PR_ProcessExit (PRIntn status)
michael@0: {
michael@0:     exit(status);
michael@0: }
michael@0: 
michael@0: PRThread *_bt_AttachThread()
michael@0: {
michael@0: 	PRThread *thread;
michael@0: 	thread_info tInfo;
michael@0: 
michael@0: 	/* make sure this thread doesn't already have a PRThread structure */
michael@0: 	PR_ASSERT(tls_get(tls_prThreadSlot) == NULL);
michael@0: 
michael@0: 	/* allocate a PRThread structure for this thread */
michael@0: 	thread = PR_NEWZAP(PRThread);
michael@0: 	if (thread == NULL)
michael@0: 	{
michael@0: 		PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
michael@0: 		return NULL;
michael@0: 	}
michael@0: 
michael@0: 	/* get the native thread's current state */
michael@0: 	get_thread_info(find_thread(NULL), &tInfo);
michael@0: 
michael@0: 	/* initialize new PRThread */
michael@0: 	thread->md.tid = tInfo.thread;
michael@0: 	thread->md.joinSem = B_ERROR;
michael@0: 	thread->priority = _bt_MapNativeToNSPRPriority(tInfo.priority);
michael@0: 
michael@0: 	/* attached threads are always non-joinable user threads */
michael@0: 	thread->state = 0;
michael@0: 
michael@0: 	/* increment user thread count */
michael@0: 	PR_Lock(bt_book.ml);
michael@0: 	bt_book.threadCount++;
michael@0: 	PR_Unlock(bt_book.ml);
michael@0: 
michael@0: 	/* store this thread's PRThread */
michael@0: 	tls_set(tls_prThreadSlot, thread);
michael@0: 	
michael@0: 	/* the thread must call _bt_CleanupThread() before it dies, in order
michael@0: 	   to clean up its PRThread, synchronize with the primordial thread,
michael@0: 	   etc. */
michael@0: 	on_exit_thread(_bt_CleanupThread, NULL);
michael@0: 	
michael@0: 	return thread;
michael@0: }