migration: Create include for migration snapshots

[qemu.git] / include / qemu / bitmap.h

diff --git a/include/qemu/bitmap.h b/include/qemu/bitmap.h
index edf4f17d9ca3a54a7b8c5b2c066df042ec9efb18..c318da12d7f106abc05fb1127090433881072e1f 100644 (file)
--- a/include/qemu/bitmap.h
+++ b/include/qemu/bitmap.h
@@ -12,7 +12,7 @@
 #ifndef BITMAP_H
 #define BITMAP_H
 
-#include "qemu-common.h"
+
 #include "qemu/bitops.h"
 
 /*
@@ -35,7 +35,9 @@
  * bitmap_empty(src, nbits)                    Are all bits zero in *src?
  * bitmap_full(src, nbits)                     Are all bits set in *src?
  * bitmap_set(dst, pos, nbits)                 Set specified bit area
+ * bitmap_set_atomic(dst, pos, nbits)   Set specified bit area with atomic ops
  * bitmap_clear(dst, pos, nbits)               Clear specified bit area
+ * bitmap_test_and_clear_atomic(dst, pos, nbits)    Test and clear area
  * bitmap_find_next_zero_area(buf, len, pos, n, mask)  Find bit free area
  */
 
@@ -55,11 +57,8 @@
  * find_next_bit(addr, nbits, bit)     Position next set bit in *addr >= bit
  */
 
-#define BITMAP_LAST_WORD_MASK(nbits)                                    \
-    (                                                                   \
-        ((nbits) % BITS_PER_LONG) ?                                     \
-        (1UL<<((nbits) % BITS_PER_LONG))-1 : ~0UL                       \
-        )
+#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
+#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1)))
 
 #define DECLARE_BITMAP(name,bits)                  \
         unsigned long name[BITS_TO_LONGS(bits)]
@@ -73,10 +72,6 @@ int slow_bitmap_equal(const unsigned long *bitmap1,
                       const unsigned long *bitmap2, long bits);
 void slow_bitmap_complement(unsigned long *dst, const unsigned long *src,
                             long bits);
-void slow_bitmap_shift_right(unsigned long *dst,
-                             const unsigned long *src, int shift, long bits);
-void slow_bitmap_shift_left(unsigned long *dst,
-                            const unsigned long *src, int shift, long bits);
 int slow_bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
                     const unsigned long *bitmap2, long bits);
 void slow_bitmap_or(unsigned long *dst, const unsigned long *bitmap1,
@@ -222,7 +217,11 @@ static inline int bitmap_intersects(const unsigned long *src1,
 }
 
 void bitmap_set(unsigned long *map, long i, long len);
+void bitmap_set_atomic(unsigned long *map, long i, long len);
 void bitmap_clear(unsigned long *map, long start, long nr);
+bool bitmap_test_and_clear_atomic(unsigned long *map, long start, long nr);
+void bitmap_copy_and_clear_atomic(unsigned long *dst, unsigned long *src,
+                                  long nr);
 unsigned long bitmap_find_next_zero_area(unsigned long *map,
                                          unsigned long size,
                                          unsigned long start,