Import sources from 2011-03-30 iso image

1 files changed, 36 insertions, 0 deletions

diff --git a/sys/src/ape/lib/ap/plan9/brk.c b/sys/src/ape/lib/ap/plan9/brk.c
new file mode 100755
index 000000000..0b3240377
--- /dev/null
+++ b/sys/src/ape/lib/ap/plan9/brk.c
@@ -0,0 +1,36 @@
+#include "lib.h"
+#include <errno.h>
+#include "sys9.h"
+
+char	end[];
+static	char	*bloc = { end };
+extern	int	_BRK_(void*);
+
+char *
+brk(char *p)
+{
+	unsigned long n;
+
+	n = (unsigned long)p;
+	n += 3;
+	n &= ~3;
+	if(_BRK_((void*)n) < 0){
+		errno = ENOMEM;
+		return (char *)-1;
+	}
+	bloc = (char *)n;
+	return 0;
+}
+
+void *
+sbrk(unsigned long n)
+{
+	n += 3;
+	n &= ~3;
+	if(_BRK_((void *)(bloc+n)) < 0){
+		errno = ENOMEM;
+		return (void *)-1;
+	}
+	bloc += n;
+	return (void *)(bloc-n);
+}