61d0b5a4b2
This makes them a bit more like the kernel headers, so we can include more real kernel headers in our tests. In addition this means that we don't break tools/virtio with the next patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
26 lines
525 B
C
26 lines
525 B
C
#ifndef ERR_H
|
|
#define ERR_H
|
|
#define MAX_ERRNO 4095
|
|
|
|
#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
|
|
|
|
static inline void * __must_check ERR_PTR(long error)
|
|
{
|
|
return (void *) error;
|
|
}
|
|
|
|
static inline long __must_check PTR_ERR(const void *ptr)
|
|
{
|
|
return (long) ptr;
|
|
}
|
|
|
|
static inline long __must_check IS_ERR(const void *ptr)
|
|
{
|
|
return IS_ERR_VALUE((unsigned long)ptr);
|
|
}
|
|
|
|
static inline long __must_check IS_ERR_OR_NULL(const void *ptr)
|
|
{
|
|
return !ptr || IS_ERR_VALUE((unsigned long)ptr);
|
|
}
|
|
#endif /* ERR_H */
|