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#include <u.h>
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#include <libc.h>
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static Lock	privlock;
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static int	privinit;
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static void	**privs;
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extern void	**_privates;
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extern int	_nprivates;
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void **
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privalloc(void)
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{
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	void **p;
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	int i;
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	lock(&privlock);
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	if(!privinit){
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		privinit = 1;
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		if(_nprivates){
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			_privates[0] = 0;
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			for(i = 1; i < _nprivates; i++)
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				_privates[i] = &_privates[i - 1];
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			privs = &_privates[i - 1];
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		}
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	}
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	p = privs;
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	if(p != nil){
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		privs = *p;
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		*p = nil;
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	}
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	unlock(&privlock);
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	return p;
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}
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void
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privfree(void **p)
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{
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	lock(&privlock);
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	if(p != nil && privinit){
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		*p = privs;
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		privs = p;
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	}
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	unlock(&privlock);
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}