/* If nfds_io is insufficient for your needs, set it to the required
number and return ERANGE. timeout is in milliseconds; if it is too
- high then lower it. It starts at -1 (==infinite) */
+ high then lower it. It starts at -1 (==infinite). */
+/* Note that beforepoll_fn may NOT do anything which might change the
+ fds or timeouts wanted by other registered poll loop loopers.
+ Callers should make sure of this by not making any calls into other
+ modules from the beforepoll_fn; the easiest way to ensure this is
+ for beforepoll_fn to only retreive information and not take any
+ action.
+ */
typedef int beforepoll_fn(void *st, struct pollfd *fds, int *nfds_io,
int *timeout_io);
typedef void afterpoll_fn(void *st, struct pollfd *fds, int nfds);
+ /* If beforepoll_fn returned ERANGE, afterpoll_fn gets nfds==0.
+ afterpoll_fn never gets !!(fds[].revents & POLLNVAL) - such
+ a report is detected as a fatal error by the event loop. */
/* void BEFOREPOLL_WANT_FDS(int want);
* Expects: int *nfds_io;
};
/* Return True if the packet was processed, and shouldn't be passed to
- any other potential receivers. */
+ any other potential receivers. (buf is freed iff True returned.) */
typedef bool_t comm_notify_fn(void *state, struct buffer_if *buf,
const struct comm_addr *source);
typedef void comm_request_notify_fn(void *commst, void *nst,
extern NORETURN(fatal_perror_status(int status, const char *message, ...))
FORMAT(printf,2,3);
+/* Convenient nonfatal logging. Requires message that does not end in '\n'.
+ * If class contains M_FATAL, exits (after entering PHASE_SHUTDOWN).
+ * lg, errnoval and loc may sensibly be 0. desc must NOT be 0.
+ * lg_[v]perror save and restore errno. */
+void lg_vperror(struct log_if *lg, const char *desc, struct cloc *loc,
+ int class, int errnoval, const char *fmt, va_list al)
+ FORMAT(printf,6,0);
+void lg_perror(struct log_if *lg, const char *desc, struct cloc *loc,
+ int class, int errnoval, const char *fmt, ...)
+ FORMAT(printf,6,7);
+
/* The cfgfatal() family of functions require messages that end in '\n' */
extern NORETURN(cfgfatal(struct cloc loc, cstring_t facility,
const char *message, ...)) FORMAT(printf,3,4);