diff options
| author | Michael Brown | 2010-06-15 18:33:23 +0200 |
|---|---|---|
| committer | Michael Brown | 2010-06-22 15:26:40 +0200 |
| commit | 4bfd5b52c1fae75eb0449af626ec69543f9334fa (patch) | |
| tree | 297bc75308e763df909fb0733c0ca2ac109ebcbc /src/include | |
| parent | [pcnet32] Replace pcnet32 with native driver (diff) | |
| download | ipxe-4bfd5b52c1fae75eb0449af626ec69543f9334fa.tar.gz ipxe-4bfd5b52c1fae75eb0449af626ec69543f9334fa.tar.xz ipxe-4bfd5b52c1fae75eb0449af626ec69543f9334fa.zip | |
[refcnt] Add ref_init() wrapper function
Standardise on using ref_init() to initialise an embedded reference
count, to match the coding style used by other embedded objects.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/refcnt.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/include/ipxe/refcnt.h b/src/include/ipxe/refcnt.h index 4b023225e..f359ac9c1 100644 --- a/src/include/ipxe/refcnt.h +++ b/src/include/ipxe/refcnt.h @@ -40,6 +40,41 @@ struct refcnt { void ( * free ) ( struct refcnt *refcnt ); }; +/** + * Initialise a reference counter + * + * @v refcnt Reference counter + * @v free Freeing function + */ +static inline __attribute__ (( always_inline )) void +ref_init ( struct refcnt *refcnt, + void ( * free ) ( struct refcnt *refcnt ) ) { + refcnt->free = free; +} + +/** + * Initialise a reference counter + * + * @v refcnt Reference counter + * @v free Free containing object + */ +#define ref_init( refcnt, free ) do { \ + if ( __builtin_constant_p ( (free) ) && ( (free) == NULL ) ) { \ + /* Skip common case of no initialisation required */ \ + } else { \ + ref_init ( (refcnt), (free) ); \ + } \ + } while ( 0 ) + +/** + * Initialise a static reference counter + * + * @v free Free containing object + */ +#define REF_INIT( free ) { \ + .free = free, \ + } + extern struct refcnt * ref_get ( struct refcnt *refcnt ); extern void ref_put ( struct refcnt *refcnt ); |