diff options
Diffstat (limited to 'timeout.h')
| -rw-r--r-- | timeout.h | 28 |
1 files changed, 28 insertions, 0 deletions
@@ -189,6 +189,34 @@ TIMEOUT_PUBLIC bool timeouts_expired(struct timeouts *); TIMEOUT_PUBLIC bool timeouts_check(struct timeouts *, FILE *); /* return true if invariants hold. describes failures to optional file handle. */ +#define TIMEOUTS_PENDING 0x10 +#define TIMEOUTS_EXPIRED 0x20 +#define TIMEOUTS_ALL (TIMEOUTS_PENDING|TIMEOUTS_EXPIRED) + +#define TIMEOUTS_CURSOR_INITIALIZER(flags) { (flags) } + +#define TIMEOUTS_CURSOR_INIT(cur, _flags) do { \ + (cur)->flags = (_flags); \ + (cur)->pc = 0; \ +} while (0) + +struct timeouts_cursor { + int flags; + unsigned pc, i, j; + struct timeout *to; +}; /* struct timeouts_cursor */ + +TIMEOUT_PUBLIC struct timeout *timeouts_next(struct timeouts *, struct timeouts_cursor *); +/* return next timeout in pending wheel or expired queue. caller can delete + * the returned timeout, but should not otherwise manipulate the timing + * wheel. in particular, caller SHOULD NOT delete any other timeout as that + * could invalidate cursor state and trigger a use-after-free. + */ + +#define TIMEOUTS_FOREACH(var, T, flags) \ + struct timeouts_cursor _foreach_cursor = TIMEOUTS_CURSOR_INITIALIZER((flags)); \ + while (((var) = timeouts_next((T), &_foreach_cursor))) + /* * B O N U S W H E E L I N T E R F A C E S |