Initial Spring 2016 commit.

2015-12-23 00:50:04 +00:00
commit cafa9f5690
732 changed files with 92195 additions and 0 deletions
--- a/kern/include/bitmap.h
+++ b/kern/include/bitmap.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2000, 2001
+ *	The President and Fellows of Harvard College.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _BITMAP_H_
+#define _BITMAP_H_
+
+/*
+ * Fixed-size array of bits. (Intended for storage management.)
+ *
+ * Functions:
+ *     bitmap_create  - allocate a new bitmap object.
+ *                      Returns NULL on error.
+ *     bitmap_getdata - return pointer to raw bit data (for I/O).
+ *     bitmap_alloc   - locate a cleared bit, set it, and return its index.
+ *     bitmap_mark    - set a clear bit by its index.
+ *     bitmap_unmark  - clear a set bit by its index.
+ *     bitmap_isset   - return whether a particular bit is set or not.
+ *     bitmap_destroy - destroy bitmap.
+ */
+
+
+struct bitmap;  /* Opaque. */
+
+struct bitmap *bitmap_create(unsigned nbits);
+void          *bitmap_getdata(struct bitmap *);
+int            bitmap_alloc(struct bitmap *, unsigned *index);
+void           bitmap_mark(struct bitmap *, unsigned index);
+void           bitmap_unmark(struct bitmap *, unsigned index);
+int            bitmap_isset(struct bitmap *, unsigned index);
+void           bitmap_destroy(struct bitmap *);
+
+
+#endif /* _BITMAP_H_ */