IOBUF: Bring in variable iobuf support

Rebasing Raghavendra's patch to master

Change-Id: Ie7a0c9a7b8e73cfe48c4573a5153460d5126208e
BUG: 2472
Reviewed-on: http://review.gluster.com/12
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Amar Tumballi <amar@gluster.com>
Reviewed-by: Anand Avati <avati@gluster.com>

1 files changed, 54 insertions, 0 deletions

diff --git a/libglusterfs/src/common-utils.c b/libglusterfs/src/common-utils.c
index 5f9f4a5c0..cb1e5a445 100644
--- a/libglusterfs/src/common-utils.c
+++ b/libglusterfs/src/common-utils.c
@@ -1783,6 +1783,60 @@ out:
 
         return flag;
 }
+/*
+ * rounds up nr to power of two. If nr is already a power of two, just returns
+ * nr
+ */
+
+inline int32_t
+gf_roundup_power_of_two (uint32_t nr)
+{
+        uint32_t result = 1;
+
+        if (nr < 0) {
+                gf_log ("common-utils", GF_LOG_WARNING,
+                        "negative number passed");
+                result = -1;
+                goto out;
+        }
+
+        while (result < nr) {
+                result *= 2;
+        }
+
+out:
+        return result;
+}
+
+/*
+ * rounds up nr to next power of two. If nr is already a power of two, next
+ * power of two is returned.
+ */
+
+/*
+ * rounds up nr to next power of two. If nr is already a power of two, next
+ * power of two is returned.
+ */
+
+inline int32_t
+gf_roundup_next_power_of_two (uint32_t nr)
+{
+        int32_t result = 1;
+
+        if (nr < 0) {
+                gf_log ("common-utils", GF_LOG_WARNING,
+                        "negative number passed");
+                result = -1;
+                goto out;
+        }
+
+        while (result <= nr) {
+                result *= 2;
+        }
+
+out:
+        return result;
+}
 
 int
 validate_brick_name (char *brick)