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macro: add new assert_return() macro for early parameter checking in functions

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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.
This commit is contained in:
Lennart Poettering 2013-10-11 00:45:47 +02:00
parent eaa3cbef3b
commit 18387b5983
1 changed files with 6 additions and 0 deletions
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6
src/shared/macro.h
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@ -159,6 +159,12 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
} while (false)
#endif
#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)))