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| author | Michael Brown | 2012-05-08 11:46:39 +0200 |
|---|---|---|
| committer | Michael Brown | 2012-05-08 13:49:01 +0200 |
| commit | 6ba7fb7c5cdcdfa6f32dd1a97c3ab235ffe54616 (patch) | |
| tree | d8c56e623edd926736a7f6e2faa6902e893bbfce | |
| parent | [tcp] Discard all TCP connections on shutdown (diff) | |
| download | ipxe-6ba7fb7c5cdcdfa6f32dd1a97c3ab235ffe54616.tar.gz ipxe-6ba7fb7c5cdcdfa6f32dd1a97c3ab235ffe54616.tar.xz ipxe-6ba7fb7c5cdcdfa6f32dd1a97c3ab235ffe54616.zip | |
[list] Add list_last_entry()
Signed-off-by: Michael Brown <mcb30@ipxe.org>
| -rw-r--r-- | src/include/ipxe/list.h | 13 | ||||
| -rw-r--r-- | src/tests/list_test.c | 14 |
2 files changed, 26 insertions, 1 deletions
diff --git a/src/include/ipxe/list.h b/src/include/ipxe/list.h index 4daf12b2e..b14a83d70 100644 --- a/src/include/ipxe/list.h +++ b/src/include/ipxe/list.h @@ -325,6 +325,19 @@ static inline void list_splice_tail_init ( struct list_head *list, list_entry ( (list)->next, type, member ) ) /** + * Get the container of the last entry in a list + * + * @v list List head + * @v type Containing type + * @v member Name of list field within containing type + * @ret first First list entry, or NULL + */ +#define list_last_entry( list, type, member ) \ + ( list_empty ( (list) ) ? \ + ( type * ) NULL : \ + list_entry ( (list)->prev, type, member ) ) + +/** * Iterate over a list * * @v pos Iterator diff --git a/src/tests/list_test.c b/src/tests/list_test.c index e237d56a8..5184b3089 100644 --- a/src/tests/list_test.c +++ b/src/tests/list_test.c @@ -368,16 +368,28 @@ static void list_test_exec ( void ) { ok ( list_entry ( &list_tests[3].list, struct list_test, list ) == &list_tests[3] ); - /* Test list_first_entry() */ + /* Test list_first_entry() and list_last_entry() */ INIT_LIST_HEAD ( list ); list_add_tail ( &list_tests[9].list, list ); list_add_tail ( &list_tests[5].list, list ); list_add_tail ( &list_tests[6].list, list ); ok ( list_first_entry ( list, struct list_test, list ) == &list_tests[9] ); + ok ( list_last_entry ( list, struct list_test, list ) + == &list_tests[6] ); list_del ( &list_tests[9].list ); ok ( list_first_entry ( list, struct list_test, list ) == &list_tests[5] ); + ok ( list_last_entry ( list, struct list_test, list ) + == &list_tests[6] ); + list_del ( &list_tests[6].list ); + ok ( list_first_entry ( list, struct list_test, list ) + == &list_tests[5] ); + ok ( list_last_entry ( list, struct list_test, list ) + == &list_tests[5] ); + list_del ( &list_tests[5].list ); + ok ( list_first_entry ( list, struct list_test, list ) == NULL ); + ok ( list_last_entry ( list, struct list_test, list ) == NULL ); /* Test list_for_each() */ INIT_LIST_HEAD ( list ); |