55 lines
1022 B
C
55 lines
1022 B
C
/*
|
|
* This file is part of the UCB release of Plan 9. It is subject to the license
|
|
* terms in the LICENSE file found in the top-level directory of this
|
|
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
|
|
* part of the UCB release of Plan 9, including this file, may be copied,
|
|
* modified, propagated, or distributed except according to the terms contained
|
|
* in the LICENSE file.
|
|
*/
|
|
|
|
#include <u.h>
|
|
#include <libc.h>
|
|
|
|
static Lock privlock;
|
|
static int privinit = 0;
|
|
static void **privs;
|
|
|
|
extern void **_privates;
|
|
extern int _nprivates;
|
|
|
|
void **
|
|
privalloc(void)
|
|
{
|
|
void **p;
|
|
int i;
|
|
lock(&privlock);
|
|
if(!privinit){
|
|
privinit = 1;
|
|
if(_nprivates){
|
|
_privates[0] = 0;
|
|
for(i = 1; i < _nprivates; i++)
|
|
_privates[i] = &_privates[i - 1];
|
|
privs = &_privates[i - 1];
|
|
}
|
|
}
|
|
p = privs;
|
|
if(p != nil){
|
|
privs = *p;
|
|
*p = nil;
|
|
}
|
|
unlock(&privlock);
|
|
|
|
return p;
|
|
}
|
|
|
|
void
|
|
privfree(void **p)
|
|
{
|
|
lock(&privlock);
|
|
if(p != nil && privinit){
|
|
*p = privs;
|
|
privs = p;
|
|
}
|
|
unlock(&privlock);
|
|
}
|