For the library functions we expose we currently repeatedly use checks
like the following:
if (!value_is_ok(parameter1))
return -EINVAL;
if (!value_is_ok(parameter2))
return -EINVAL;
And so on. Let's turn this into a macro:
assert_return(value_is_ok(parameter1), -EINVAL);
assert_return(value_is_ok(paramater2), -EINVAL);
This makes our code a bit shorter and simpler, and also allows us to add
a _unlikely_() around the check.
+#define assert_return(expr, r) \
+ do { \
+ if (!(expr)) \
+ return (r); \
+ } while (false)
+
#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
#define PTR_TO_INT(p) ((int) ((intptr_t) (p)))
#define INT_TO_PTR(u) ((void *) ((intptr_t) (u)))
#define PTR_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))