Import sources from 2011-03-30 iso image

1 files changed, 45 insertions, 0 deletions

diff --git a/sys/src/libc/9sys/privalloc.c b/sys/src/libc/9sys/privalloc.c
new file mode 100755
index 000000000..907485e2f
--- /dev/null
+++ b/sys/src/libc/9sys/privalloc.c
@@ -0,0 +1,45 @@
+#include <u.h>
+#include <libc.h>
+
+static Lock	privlock;
+static int	privinit;
+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);
+}