path: root/common.h
diff options
authorSuraj Jitindar Singh <>2017-04-12 14:37:24 +1000
committerSuraj Jitindar Singh <>2017-04-19 16:57:43 +1000
commit0aff80c0fc286b9ba386365c79088ccf156a7ab8 (patch)
treeaaf6025e6038dd437256b2f38e8091dd44997c8f /common.h
parentc29172e1734012af7a9b97c5170b9da6a571e343 (diff)
mboxd: Check that window size is indeed a power of 2
The window size can be specified on the command line however we restrict this to being a power of 2 due to the internal working of the daemon. Currently we specify that this is the case in the help message but don't explicitly verify this when parsing the command line. Check that if the window size parameter is provided that the value is indeed a power of 2 and error out if this is not the case. Signed-off-by: Suraj Jitindar Singh <> Change-Id: I0cb36222d53830996380702802373d862010f503
Diffstat (limited to 'common.h')
1 files changed, 5 insertions, 0 deletions
diff --git a/common.h b/common.h
index ee537a8..14fdfe9 100644
--- a/common.h
+++ b/common.h
@@ -83,6 +83,11 @@ static inline int log_2(int val)
return ret;
+static inline bool is_power_of_2(unsigned val)
+ return __builtin_popcount(val) == 1;
char *get_dev_mtd(void);
#endif /* COMMON_H */
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