After two or more events have been registered for the same file
descriptor using EV_ET, if one of the events is deleted, then the
epoll_ctl() call issued by libevent drops the EPOLLET flag resulting in
level triggered notifications.
[ azat: use existing "et" in the evmap_io_del_() ]
This fixes assertion failures in cases where epoll() fails with EBADF
-- the root cause for which is as of yet unknown. It seems something
(OpenSSL?) is closing the file descriptor under our feet.
* Fix whitespace
* Explain return value from callback function
* Reinstate return value so that caller can tell whether forech
exited early.
* Rename event_base_foreach_event_() to
event_base_foreach_event_nolock_().
* Use event_base_foreach_event_cb_fn typedef in more places
* Be more dire about undefined behavior.
We haven't had a convention for naming internal functions in -internal.h
versus naming visible functions in include/**.h. This patch changes every
function declared in a -internal.h file to be named ending with an
underscore.
Static function names are unaffected, since there's no risk of calling them
from outside Libevent.
This is an automatic conversion. The script that produced was made by
running the following script over the output of
ctags --c-kinds=pf -o - *-internal.h | cut -f 1 | sort| uniq
(GNU ctags was required.)
=====
#!/usr/bin/perl -w -n
use strict;
BEGIN { print "#!/usr/bin/perl -w -i -p\n\n"; }
chomp;
my $ident = $_;
next if ($ident =~ /_$/);
next if ($ident =~ /^TAILQ/);
my $better = "${ident}_";
print "s/(?<![A-Za-z0-9_])$ident(?![A-Za-z0-9_])/$better/g;\n";
=== And then running the script below that it generated over all
=== the .c and .h files again
#!/usr/bin/perl -w -i -p
s/(?<![A-Za-z0-9_])bufferevent_async_can_connect(?![A-Za-z0-9_])/bufferevent_async_can_connect_/g;
s/(?<![A-Za-z0-9_])bufferevent_async_connect(?![A-Za-z0-9_])/bufferevent_async_connect_/g;
s/(?<![A-Za-z0-9_])bufferevent_async_new(?![A-Za-z0-9_])/bufferevent_async_new_/g;
s/(?<![A-Za-z0-9_])bufferevent_async_set_connected(?![A-Za-z0-9_])/bufferevent_async_set_connected_/g;
s/(?<![A-Za-z0-9_])bufferevent_decref(?![A-Za-z0-9_])/bufferevent_decref_/g;
s/(?<![A-Za-z0-9_])bufferevent_disable_hard(?![A-Za-z0-9_])/bufferevent_disable_hard_/g;
s/(?<![A-Za-z0-9_])bufferevent_enable_locking(?![A-Za-z0-9_])/bufferevent_enable_locking_/g;
s/(?<![A-Za-z0-9_])bufferevent_incref(?![A-Za-z0-9_])/bufferevent_incref_/g;
s/(?<![A-Za-z0-9_])bufferevent_init_common(?![A-Za-z0-9_])/bufferevent_init_common_/g;
s/(?<![A-Za-z0-9_])bufferevent_remove_from_rate_limit_group_internal(?![A-Za-z0-9_])/bufferevent_remove_from_rate_limit_group_internal_/g;
s/(?<![A-Za-z0-9_])bufferevent_suspend_read(?![A-Za-z0-9_])/bufferevent_suspend_read_/g;
s/(?<![A-Za-z0-9_])bufferevent_suspend_write(?![A-Za-z0-9_])/bufferevent_suspend_write_/g;
s/(?<![A-Za-z0-9_])bufferevent_unsuspend_read(?![A-Za-z0-9_])/bufferevent_unsuspend_read_/g;
s/(?<![A-Za-z0-9_])bufferevent_unsuspend_write(?![A-Za-z0-9_])/bufferevent_unsuspend_write_/g;
s/(?<![A-Za-z0-9_])evbuffer_commit_read(?![A-Za-z0-9_])/evbuffer_commit_read_/g;
s/(?<![A-Za-z0-9_])evbuffer_commit_write(?![A-Za-z0-9_])/evbuffer_commit_write_/g;
s/(?<![A-Za-z0-9_])evbuffer_invoke_callbacks(?![A-Za-z0-9_])/evbuffer_invoke_callbacks_/g;
s/(?<![A-Za-z0-9_])evbuffer_launch_read(?![A-Za-z0-9_])/evbuffer_launch_read_/g;
s/(?<![A-Za-z0-9_])evbuffer_launch_write(?![A-Za-z0-9_])/evbuffer_launch_write_/g;
s/(?<![A-Za-z0-9_])evbuffer_overlapped_new(?![A-Za-z0-9_])/evbuffer_overlapped_new_/g;
s/(?<![A-Za-z0-9_])evbuffer_set_parent(?![A-Za-z0-9_])/evbuffer_set_parent_/g;
s/(?<![A-Za-z0-9_])event_active_nolock(?![A-Za-z0-9_])/event_active_nolock_/g;
s/(?<![A-Za-z0-9_])event_base_add_virtual(?![A-Za-z0-9_])/event_base_add_virtual_/g;
s/(?<![A-Za-z0-9_])event_base_assert_ok(?![A-Za-z0-9_])/event_base_assert_ok_/g;
s/(?<![A-Za-z0-9_])event_base_del_virtual(?![A-Za-z0-9_])/event_base_del_virtual_/g;
s/(?<![A-Za-z0-9_])event_base_get_deferred_cb_queue(?![A-Za-z0-9_])/event_base_get_deferred_cb_queue_/g;
s/(?<![A-Za-z0-9_])event_base_get_iocp(?![A-Za-z0-9_])/event_base_get_iocp_/g;
s/(?<![A-Za-z0-9_])event_base_start_iocp(?![A-Za-z0-9_])/event_base_start_iocp_/g;
s/(?<![A-Za-z0-9_])event_base_stop_iocp(?![A-Za-z0-9_])/event_base_stop_iocp_/g;
s/(?<![A-Za-z0-9_])event_changelist_add(?![A-Za-z0-9_])/event_changelist_add_/g;
s/(?<![A-Za-z0-9_])event_changelist_del(?![A-Za-z0-9_])/event_changelist_del_/g;
s/(?<![A-Za-z0-9_])event_changelist_freemem(?![A-Za-z0-9_])/event_changelist_freemem_/g;
s/(?<![A-Za-z0-9_])event_changelist_init(?![A-Za-z0-9_])/event_changelist_init_/g;
s/(?<![A-Za-z0-9_])event_changelist_remove_all(?![A-Za-z0-9_])/event_changelist_remove_all_/g;
s/(?<![A-Za-z0-9_])event_deferred_cb_cancel(?![A-Za-z0-9_])/event_deferred_cb_cancel_/g;
s/(?<![A-Za-z0-9_])event_deferred_cb_init(?![A-Za-z0-9_])/event_deferred_cb_init_/g;
s/(?<![A-Za-z0-9_])event_deferred_cb_queue_init(?![A-Za-z0-9_])/event_deferred_cb_queue_init_/g;
s/(?<![A-Za-z0-9_])event_deferred_cb_schedule(?![A-Za-z0-9_])/event_deferred_cb_schedule_/g;
s/(?<![A-Za-z0-9_])event_get_win32_extension_fns(?![A-Za-z0-9_])/event_get_win32_extension_fns_/g;
s/(?<![A-Za-z0-9_])event_iocp_activate_overlapped(?![A-Za-z0-9_])/event_iocp_activate_overlapped_/g;
s/(?<![A-Za-z0-9_])event_iocp_port_associate(?![A-Za-z0-9_])/event_iocp_port_associate_/g;
s/(?<![A-Za-z0-9_])event_iocp_port_launch(?![A-Za-z0-9_])/event_iocp_port_launch_/g;
s/(?<![A-Za-z0-9_])event_iocp_shutdown(?![A-Za-z0-9_])/event_iocp_shutdown_/g;
s/(?<![A-Za-z0-9_])event_overlapped_init(?![A-Za-z0-9_])/event_overlapped_init_/g;
s/(?<![A-Za-z0-9_])evhttp_connection_connect(?![A-Za-z0-9_])/evhttp_connection_connect_/g;
s/(?<![A-Za-z0-9_])evhttp_connection_fail(?![A-Za-z0-9_])/evhttp_connection_fail_/g;
s/(?<![A-Za-z0-9_])evhttp_connection_reset(?![A-Za-z0-9_])/evhttp_connection_reset_/g;
s/(?<![A-Za-z0-9_])evhttp_parse_firstline(?![A-Za-z0-9_])/evhttp_parse_firstline_/g;
s/(?<![A-Za-z0-9_])evhttp_parse_headers(?![A-Za-z0-9_])/evhttp_parse_headers_/g;
s/(?<![A-Za-z0-9_])evhttp_response_code(?![A-Za-z0-9_])/evhttp_response_code_/g;
s/(?<![A-Za-z0-9_])evhttp_send_page(?![A-Za-z0-9_])/evhttp_send_page_/g;
s/(?<![A-Za-z0-9_])evhttp_start_read(?![A-Za-z0-9_])/evhttp_start_read_/g;
s/(?<![A-Za-z0-9_])EVLOCK_TRY_LOCK(?![A-Za-z0-9_])/EVLOCK_TRY_LOCK_/g;
s/(?<![A-Za-z0-9_])evmap_check_integrity(?![A-Za-z0-9_])/evmap_check_integrity_/g;
s/(?<![A-Za-z0-9_])evmap_delete_all(?![A-Za-z0-9_])/evmap_delete_all_/g;
s/(?<![A-Za-z0-9_])evmap_foreach_event(?![A-Za-z0-9_])/evmap_foreach_event_/g;
s/(?<![A-Za-z0-9_])evmap_io_active(?![A-Za-z0-9_])/evmap_io_active_/g;
s/(?<![A-Za-z0-9_])evmap_io_add(?![A-Za-z0-9_])/evmap_io_add_/g;
s/(?<![A-Za-z0-9_])evmap_io_clear(?![A-Za-z0-9_])/evmap_io_clear_/g;
s/(?<![A-Za-z0-9_])evmap_io_del(?![A-Za-z0-9_])/evmap_io_del_/g;
s/(?<![A-Za-z0-9_])evmap_io_get_fdinfo(?![A-Za-z0-9_])/evmap_io_get_fdinfo_/g;
s/(?<![A-Za-z0-9_])evmap_io_initmap(?![A-Za-z0-9_])/evmap_io_initmap_/g;
s/(?<![A-Za-z0-9_])evmap_reinit(?![A-Za-z0-9_])/evmap_reinit_/g;
s/(?<![A-Za-z0-9_])evmap_signal_active(?![A-Za-z0-9_])/evmap_signal_active_/g;
s/(?<![A-Za-z0-9_])evmap_signal_add(?![A-Za-z0-9_])/evmap_signal_add_/g;
s/(?<![A-Za-z0-9_])evmap_signal_clear(?![A-Za-z0-9_])/evmap_signal_clear_/g;
s/(?<![A-Za-z0-9_])evmap_signal_del(?![A-Za-z0-9_])/evmap_signal_del_/g;
s/(?<![A-Za-z0-9_])evmap_signal_initmap(?![A-Za-z0-9_])/evmap_signal_initmap_/g;
s/(?<![A-Za-z0-9_])evrpc_hook_associate_meta(?![A-Za-z0-9_])/evrpc_hook_associate_meta_/g;
s/(?<![A-Za-z0-9_])evrpc_hook_context_free(?![A-Za-z0-9_])/evrpc_hook_context_free_/g;
s/(?<![A-Za-z0-9_])evrpc_hook_meta_new(?![A-Za-z0-9_])/evrpc_hook_meta_new_/g;
s/(?<![A-Za-z0-9_])evrpc_reqstate_free(?![A-Za-z0-9_])/evrpc_reqstate_free_/g;
s/(?<![A-Za-z0-9_])evsig_dealloc(?![A-Za-z0-9_])/evsig_dealloc_/g;
s/(?<![A-Za-z0-9_])evsig_init(?![A-Za-z0-9_])/evsig_init_/g;
s/(?<![A-Za-z0-9_])evsig_set_base(?![A-Za-z0-9_])/evsig_set_base_/g;
s/(?<![A-Za-z0-9_])ev_token_bucket_get_tick(?![A-Za-z0-9_])/ev_token_bucket_get_tick_/g;
s/(?<![A-Za-z0-9_])ev_token_bucket_init(?![A-Za-z0-9_])/ev_token_bucket_init_/g;
s/(?<![A-Za-z0-9_])ev_token_bucket_update(?![A-Za-z0-9_])/ev_token_bucket_update_/g;
s/(?<![A-Za-z0-9_])evutil_accept4(?![A-Za-z0-9_])/evutil_accept4_/g;
s/(?<![A-Za-z0-9_])evutil_addrinfo_append(?![A-Za-z0-9_])/evutil_addrinfo_append_/g;
s/(?<![A-Za-z0-9_])evutil_adjust_hints_for_addrconfig(?![A-Za-z0-9_])/evutil_adjust_hints_for_addrconfig_/g;
s/(?<![A-Za-z0-9_])evutil_ersatz_socketpair(?![A-Za-z0-9_])/evutil_ersatz_socketpair_/g;
s/(?<![A-Za-z0-9_])evutil_eventfd(?![A-Za-z0-9_])/evutil_eventfd_/g;
s/(?<![A-Za-z0-9_])evutil_format_sockaddr_port(?![A-Za-z0-9_])/evutil_format_sockaddr_port_/g;
s/(?<![A-Za-z0-9_])evutil_getaddrinfo_async(?![A-Za-z0-9_])/evutil_getaddrinfo_async_/g;
s/(?<![A-Za-z0-9_])evutil_getaddrinfo_common(?![A-Za-z0-9_])/evutil_getaddrinfo_common_/g;
s/(?<![A-Za-z0-9_])evutil_getenv(?![A-Za-z0-9_])/evutil_getenv_/g;
s/(?<![A-Za-z0-9_])evutil_hex_char_to_int(?![A-Za-z0-9_])/evutil_hex_char_to_int_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISALNUM(?![A-Za-z0-9_])/EVUTIL_ISALNUM_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISALPHA(?![A-Za-z0-9_])/EVUTIL_ISALPHA_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISDIGIT(?![A-Za-z0-9_])/EVUTIL_ISDIGIT_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISLOWER(?![A-Za-z0-9_])/EVUTIL_ISLOWER_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISPRINT(?![A-Za-z0-9_])/EVUTIL_ISPRINT_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISSPACE(?![A-Za-z0-9_])/EVUTIL_ISSPACE_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISUPPER(?![A-Za-z0-9_])/EVUTIL_ISUPPER_/g;
s/(?<![A-Za-z0-9_])EVUTIL_ISXDIGIT(?![A-Za-z0-9_])/EVUTIL_ISXDIGIT_/g;
s/(?<![A-Za-z0-9_])evutil_load_windows_system_library(?![A-Za-z0-9_])/evutil_load_windows_system_library_/g;
s/(?<![A-Za-z0-9_])evutil_make_internal_pipe(?![A-Za-z0-9_])/evutil_make_internal_pipe_/g;
s/(?<![A-Za-z0-9_])evutil_new_addrinfo(?![A-Za-z0-9_])/evutil_new_addrinfo_/g;
s/(?<![A-Za-z0-9_])evutil_open_closeonexec(?![A-Za-z0-9_])/evutil_open_closeonexec_/g;
s/(?<![A-Za-z0-9_])evutil_read_file(?![A-Za-z0-9_])/evutil_read_file_/g;
s/(?<![A-Za-z0-9_])evutil_resolve(?![A-Za-z0-9_])/evutil_resolve_/g;
s/(?<![A-Za-z0-9_])evutil_set_evdns_getaddrinfo_fn(?![A-Za-z0-9_])/evutil_set_evdns_getaddrinfo_fn_/g;
s/(?<![A-Za-z0-9_])evutil_sockaddr_is_loopback(?![A-Za-z0-9_])/evutil_sockaddr_is_loopback_/g;
s/(?<![A-Za-z0-9_])evutil_socket(?![A-Za-z0-9_])/evutil_socket_/g;
s/(?<![A-Za-z0-9_])evutil_socket_connect(?![A-Za-z0-9_])/evutil_socket_connect_/g;
s/(?<![A-Za-z0-9_])evutil_socket_finished_connecting(?![A-Za-z0-9_])/evutil_socket_finished_connecting_/g;
s/(?<![A-Za-z0-9_])EVUTIL_TOLOWER(?![A-Za-z0-9_])/EVUTIL_TOLOWER_/g;
s/(?<![A-Za-z0-9_])EVUTIL_TOUPPER(?![A-Za-z0-9_])/EVUTIL_TOUPPER_/g;
s/(?<![A-Za-z0-9_])evutil_tv_to_msec(?![A-Za-z0-9_])/evutil_tv_to_msec_/g;
s/(?<![A-Za-z0-9_])evutil_usleep(?![A-Za-z0-9_])/evutil_usleep_/g;
s/(?<![A-Za-z0-9_])ht_improve_hash(?![A-Za-z0-9_])/ht_improve_hash_/g;
s/(?<![A-Za-z0-9_])ht_string_hash(?![A-Za-z0-9_])/ht_string_hash_/g;
s/(?<![A-Za-z0-9_])min_heap_adjust(?![A-Za-z0-9_])/min_heap_adjust_/g;
s/(?<![A-Za-z0-9_])min_heap_ctor(?![A-Za-z0-9_])/min_heap_ctor_/g;
s/(?<![A-Za-z0-9_])min_heap_dtor(?![A-Za-z0-9_])/min_heap_dtor_/g;
s/(?<![A-Za-z0-9_])min_heap_elem_init(?![A-Za-z0-9_])/min_heap_elem_init_/g;
s/(?<![A-Za-z0-9_])min_heap_elt_is_top(?![A-Za-z0-9_])/min_heap_elt_is_top_/g;
s/(?<![A-Za-z0-9_])min_heap_empty(?![A-Za-z0-9_])/min_heap_empty_/g;
s/(?<![A-Za-z0-9_])min_heap_erase(?![A-Za-z0-9_])/min_heap_erase_/g;
s/(?<![A-Za-z0-9_])min_heap_pop(?![A-Za-z0-9_])/min_heap_pop_/g;
s/(?<![A-Za-z0-9_])min_heap_push(?![A-Za-z0-9_])/min_heap_push_/g;
s/(?<![A-Za-z0-9_])min_heap_reserve(?![A-Za-z0-9_])/min_heap_reserve_/g;
s/(?<![A-Za-z0-9_])min_heap_size(?![A-Za-z0-9_])/min_heap_size_/g;
s/(?<![A-Za-z0-9_])min_heap_top(?![A-Za-z0-9_])/min_heap_top_/g;
C reserves all identifiers beginning with an underscore for system
use. But we had been mangling our autoconf identifiers with the
prefix "_EVENT_" to avoid conflict with other programs.
Instead, we will now use the prefix "EVENT__". With any luck, the
double-underscore will still hint "here be dragons" to anybody
tempted to think that event-config.h is a stable api.
This is an automatically generated patch. The script that produced
it was made by running this script over config.h.in:
=====
#!/usr/bin/perl -w
# Run this on config.h.in
use strict;
my %macros = ();
while (<>) {
if (/^# *undef +([A-Za-z0-9_]+)/) {
$macros{$1} = 1;
}
}
print "#!/usr/bin/perl -w -i -p\n\n";
for my $k (sort keys %macros) {
print "s/(?<![A-Za-z0-9_])_EVENT_$k(?![A-Za-z0-9_])/EVENT__$k/g;\n";
}
== And the script that it generated was then run over all .c and .h files:
#!/usr/bin/perl -w -i -p
s/(?<![A-Za-z0-9_])_EVENT_DISABLE_DEBUG_MODE(?![A-Za-z0-9_])/EVENT__DISABLE_DEBUG_MODE/g;
s/(?<![A-Za-z0-9_])_EVENT_DISABLE_MM_REPLACEMENT(?![A-Za-z0-9_])/EVENT__DISABLE_MM_REPLACEMENT/g;
s/(?<![A-Za-z0-9_])_EVENT_DISABLE_THREAD_SUPPORT(?![A-Za-z0-9_])/EVENT__DISABLE_THREAD_SUPPORT/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_ACCEPT4(?![A-Za-z0-9_])/EVENT__HAVE_ACCEPT4/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_ARC4RANDOM(?![A-Za-z0-9_])/EVENT__HAVE_ARC4RANDOM/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_ARC4RANDOM_BUF(?![A-Za-z0-9_])/EVENT__HAVE_ARC4RANDOM_BUF/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_ARPA_INET_H(?![A-Za-z0-9_])/EVENT__HAVE_ARPA_INET_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_CLOCK_GETTIME(?![A-Za-z0-9_])/EVENT__HAVE_CLOCK_GETTIME/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_CTL_KERN(?![A-Za-z0-9_])/EVENT__HAVE_DECL_CTL_KERN/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_KERN_ARND(?![A-Za-z0-9_])/EVENT__HAVE_DECL_KERN_ARND/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_KERN_RANDOM(?![A-Za-z0-9_])/EVENT__HAVE_DECL_KERN_RANDOM/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_DECL_RANDOM_UUID(?![A-Za-z0-9_])/EVENT__HAVE_DECL_RANDOM_UUID/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_DEVPOLL(?![A-Za-z0-9_])/EVENT__HAVE_DEVPOLL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_DLFCN_H(?![A-Za-z0-9_])/EVENT__HAVE_DLFCN_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_EPOLL(?![A-Za-z0-9_])/EVENT__HAVE_EPOLL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_EPOLL_CREATE1(?![A-Za-z0-9_])/EVENT__HAVE_EPOLL_CREATE1/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_EPOLL_CTL(?![A-Za-z0-9_])/EVENT__HAVE_EPOLL_CTL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_EVENTFD(?![A-Za-z0-9_])/EVENT__HAVE_EVENTFD/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_EVENT_PORTS(?![A-Za-z0-9_])/EVENT__HAVE_EVENT_PORTS/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_FCNTL(?![A-Za-z0-9_])/EVENT__HAVE_FCNTL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_FCNTL_H(?![A-Za-z0-9_])/EVENT__HAVE_FCNTL_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_FD_MASK(?![A-Za-z0-9_])/EVENT__HAVE_FD_MASK/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETADDRINFO(?![A-Za-z0-9_])/EVENT__HAVE_GETADDRINFO/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETEGID(?![A-Za-z0-9_])/EVENT__HAVE_GETEGID/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETEUID(?![A-Za-z0-9_])/EVENT__HAVE_GETEUID/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R_3_ARG(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R_3_ARG/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R_5_ARG(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R_5_ARG/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETHOSTBYNAME_R_6_ARG(?![A-Za-z0-9_])/EVENT__HAVE_GETHOSTBYNAME_R_6_ARG/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETIFADDRS(?![A-Za-z0-9_])/EVENT__HAVE_GETIFADDRS/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETNAMEINFO(?![A-Za-z0-9_])/EVENT__HAVE_GETNAMEINFO/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETPROTOBYNUMBER(?![A-Za-z0-9_])/EVENT__HAVE_GETPROTOBYNUMBER/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETSERVBYNAME(?![A-Za-z0-9_])/EVENT__HAVE_GETSERVBYNAME/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_GETTIMEOFDAY(?![A-Za-z0-9_])/EVENT__HAVE_GETTIMEOFDAY/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_IFADDRS_H(?![A-Za-z0-9_])/EVENT__HAVE_IFADDRS_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_INET_ATON(?![A-Za-z0-9_])/EVENT__HAVE_INET_ATON/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_INET_NTOP(?![A-Za-z0-9_])/EVENT__HAVE_INET_NTOP/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_INET_PTON(?![A-Za-z0-9_])/EVENT__HAVE_INET_PTON/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_INTTYPES_H(?![A-Za-z0-9_])/EVENT__HAVE_INTTYPES_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_ISSETUGID(?![A-Za-z0-9_])/EVENT__HAVE_ISSETUGID/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_KQUEUE(?![A-Za-z0-9_])/EVENT__HAVE_KQUEUE/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_LIBZ(?![A-Za-z0-9_])/EVENT__HAVE_LIBZ/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_MEMORY_H(?![A-Za-z0-9_])/EVENT__HAVE_MEMORY_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_MMAP(?![A-Za-z0-9_])/EVENT__HAVE_MMAP/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_NANOSLEEP(?![A-Za-z0-9_])/EVENT__HAVE_NANOSLEEP/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_NETDB_H(?![A-Za-z0-9_])/EVENT__HAVE_NETDB_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_NETINET_IN6_H(?![A-Za-z0-9_])/EVENT__HAVE_NETINET_IN6_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_NETINET_IN_H(?![A-Za-z0-9_])/EVENT__HAVE_NETINET_IN_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_NETINET_TCP_H(?![A-Za-z0-9_])/EVENT__HAVE_NETINET_TCP_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_OPENSSL(?![A-Za-z0-9_])/EVENT__HAVE_OPENSSL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_PIPE(?![A-Za-z0-9_])/EVENT__HAVE_PIPE/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_PIPE2(?![A-Za-z0-9_])/EVENT__HAVE_PIPE2/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_POLL(?![A-Za-z0-9_])/EVENT__HAVE_POLL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_POLL_H(?![A-Za-z0-9_])/EVENT__HAVE_POLL_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_PORT_CREATE(?![A-Za-z0-9_])/EVENT__HAVE_PORT_CREATE/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_PORT_H(?![A-Za-z0-9_])/EVENT__HAVE_PORT_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_PTHREAD(?![A-Za-z0-9_])/EVENT__HAVE_PTHREAD/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_PTHREADS(?![A-Za-z0-9_])/EVENT__HAVE_PTHREADS/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_PUTENV(?![A-Za-z0-9_])/EVENT__HAVE_PUTENV/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SA_FAMILY_T(?![A-Za-z0-9_])/EVENT__HAVE_SA_FAMILY_T/g;
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s/(?<![A-Za-z0-9_])_EVENT_HAVE_SENDFILE(?![A-Za-z0-9_])/EVENT__HAVE_SENDFILE/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SETENV(?![A-Za-z0-9_])/EVENT__HAVE_SETENV/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SETFD(?![A-Za-z0-9_])/EVENT__HAVE_SETFD/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SETRLIMIT(?![A-Za-z0-9_])/EVENT__HAVE_SETRLIMIT/g;
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s/(?<![A-Za-z0-9_])_EVENT_HAVE_SIGNAL(?![A-Za-z0-9_])/EVENT__HAVE_SIGNAL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SPLICE(?![A-Za-z0-9_])/EVENT__HAVE_SPLICE/g;
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s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRINGS_H(?![A-Za-z0-9_])/EVENT__HAVE_STRINGS_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRING_H(?![A-Za-z0-9_])/EVENT__HAVE_STRING_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRLCPY(?![A-Za-z0-9_])/EVENT__HAVE_STRLCPY/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRSEP(?![A-Za-z0-9_])/EVENT__HAVE_STRSEP/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRTOK_R(?![A-Za-z0-9_])/EVENT__HAVE_STRTOK_R/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRTOLL(?![A-Za-z0-9_])/EVENT__HAVE_STRTOLL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_ADDRINFO(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_ADDRINFO/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_IN6_ADDR(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_IN6_ADDR/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_IN6_ADDR_S6_ADDR16(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_IN6_ADDR_S6_ADDR16/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_IN6_ADDR_S6_ADDR32(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_IN6_ADDR_S6_ADDR32/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_SOCKADDR_IN6(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_SOCKADDR_IN6/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_SOCKADDR_IN_SIN_LEN(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_SOCKADDR_IN_SIN_LEN/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_SOCKADDR_STORAGE(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_SOCKADDR_STORAGE/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY(?![A-Za-z0-9_])/EVENT__HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYSCTL(?![A-Za-z0-9_])/EVENT__HAVE_SYSCTL/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_DEVPOLL_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_DEVPOLL_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_EPOLL_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_EPOLL_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_EVENTFD_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_EVENTFD_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_EVENT_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_EVENT_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_IOCTL_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_IOCTL_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_MMAN_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_MMAN_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_PARAM_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_PARAM_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_QUEUE_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_QUEUE_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_RESOURCE_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_RESOURCE_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_SELECT_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_SELECT_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_SENDFILE_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_SENDFILE_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_SOCKET_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_SOCKET_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_STAT_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_STAT_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_SYSCTL_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_SYSCTL_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_TIME_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_TIME_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_TYPES_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_TYPES_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_UIO_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_UIO_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_SYS_WAIT_H(?![A-Za-z0-9_])/EVENT__HAVE_SYS_WAIT_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_TAILQFOREACH(?![A-Za-z0-9_])/EVENT__HAVE_TAILQFOREACH/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_TIMERADD(?![A-Za-z0-9_])/EVENT__HAVE_TIMERADD/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_TIMERCLEAR(?![A-Za-z0-9_])/EVENT__HAVE_TIMERCLEAR/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_TIMERCMP(?![A-Za-z0-9_])/EVENT__HAVE_TIMERCMP/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_TIMERISSET(?![A-Za-z0-9_])/EVENT__HAVE_TIMERISSET/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_UINT16_T(?![A-Za-z0-9_])/EVENT__HAVE_UINT16_T/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_UINT32_T(?![A-Za-z0-9_])/EVENT__HAVE_UINT32_T/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_UINT64_T(?![A-Za-z0-9_])/EVENT__HAVE_UINT64_T/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_UINT8_T(?![A-Za-z0-9_])/EVENT__HAVE_UINT8_T/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_UINTPTR_T(?![A-Za-z0-9_])/EVENT__HAVE_UINTPTR_T/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_UNISTD_H(?![A-Za-z0-9_])/EVENT__HAVE_UNISTD_H/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_UNSETENV(?![A-Za-z0-9_])/EVENT__HAVE_UNSETENV/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_USLEEP(?![A-Za-z0-9_])/EVENT__HAVE_USLEEP/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_VASPRINTF(?![A-Za-z0-9_])/EVENT__HAVE_VASPRINTF/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_WORKING_KQUEUE(?![A-Za-z0-9_])/EVENT__HAVE_WORKING_KQUEUE/g;
s/(?<![A-Za-z0-9_])_EVENT_HAVE_ZLIB_H(?![A-Za-z0-9_])/EVENT__HAVE_ZLIB_H/g;
s/(?<![A-Za-z0-9_])_EVENT_LT_OBJDIR(?![A-Za-z0-9_])/EVENT__LT_OBJDIR/g;
s/(?<![A-Za-z0-9_])_EVENT_NO_MINUS_C_MINUS_O(?![A-Za-z0-9_])/EVENT__NO_MINUS_C_MINUS_O/g;
s/(?<![A-Za-z0-9_])_EVENT_NUMERIC_VERSION(?![A-Za-z0-9_])/EVENT__NUMERIC_VERSION/g;
s/(?<![A-Za-z0-9_])_EVENT_PACKAGE(?![A-Za-z0-9_])/EVENT__PACKAGE/g;
s/(?<![A-Za-z0-9_])_EVENT_PACKAGE_BUGREPORT(?![A-Za-z0-9_])/EVENT__PACKAGE_BUGREPORT/g;
s/(?<![A-Za-z0-9_])_EVENT_PACKAGE_NAME(?![A-Za-z0-9_])/EVENT__PACKAGE_NAME/g;
s/(?<![A-Za-z0-9_])_EVENT_PACKAGE_STRING(?![A-Za-z0-9_])/EVENT__PACKAGE_STRING/g;
s/(?<![A-Za-z0-9_])_EVENT_PACKAGE_TARNAME(?![A-Za-z0-9_])/EVENT__PACKAGE_TARNAME/g;
s/(?<![A-Za-z0-9_])_EVENT_PACKAGE_URL(?![A-Za-z0-9_])/EVENT__PACKAGE_URL/g;
s/(?<![A-Za-z0-9_])_EVENT_PACKAGE_VERSION(?![A-Za-z0-9_])/EVENT__PACKAGE_VERSION/g;
s/(?<![A-Za-z0-9_])_EVENT_PTHREAD_CREATE_JOINABLE(?![A-Za-z0-9_])/EVENT__PTHREAD_CREATE_JOINABLE/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_INT(?![A-Za-z0-9_])/EVENT__SIZEOF_INT/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_LONG(?![A-Za-z0-9_])/EVENT__SIZEOF_LONG/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_LONG_LONG(?![A-Za-z0-9_])/EVENT__SIZEOF_LONG_LONG/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_OFF_T(?![A-Za-z0-9_])/EVENT__SIZEOF_OFF_T/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_PTHREAD_T(?![A-Za-z0-9_])/EVENT__SIZEOF_PTHREAD_T/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_SHORT(?![A-Za-z0-9_])/EVENT__SIZEOF_SHORT/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_SIZE_T(?![A-Za-z0-9_])/EVENT__SIZEOF_SIZE_T/g;
s/(?<![A-Za-z0-9_])_EVENT_SIZEOF_VOID_P(?![A-Za-z0-9_])/EVENT__SIZEOF_VOID_P/g;
s/(?<![A-Za-z0-9_])_EVENT_STDC_HEADERS(?![A-Za-z0-9_])/EVENT__STDC_HEADERS/g;
s/(?<![A-Za-z0-9_])_EVENT_TIME_WITH_SYS_TIME(?![A-Za-z0-9_])/EVENT__TIME_WITH_SYS_TIME/g;
s/(?<![A-Za-z0-9_])_EVENT_VERSION(?![A-Za-z0-9_])/EVENT__VERSION/g;
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s/(?<![A-Za-z0-9_])_EVENT__GNU_SOURCE(?![A-Za-z0-9_])/EVENT___GNU_SOURCE/g;
s/(?<![A-Za-z0-9_])_EVENT__LARGE_FILES(?![A-Za-z0-9_])/EVENT___LARGE_FILES/g;
s/(?<![A-Za-z0-9_])_EVENT__MINIX(?![A-Za-z0-9_])/EVENT___MINIX/g;
s/(?<![A-Za-z0-9_])_EVENT__POSIX_1_SOURCE(?![A-Za-z0-9_])/EVENT___POSIX_1_SOURCE/g;
s/(?<![A-Za-z0-9_])_EVENT__POSIX_PTHREAD_SEMANTICS(?![A-Za-z0-9_])/EVENT___POSIX_PTHREAD_SEMANTICS/g;
s/(?<![A-Za-z0-9_])_EVENT__POSIX_SOURCE(?![A-Za-z0-9_])/EVENT___POSIX_SOURCE/g;
s/(?<![A-Za-z0-9_])_EVENT__TANDEM_SOURCE(?![A-Za-z0-9_])/EVENT___TANDEM_SOURCE/g;
s/(?<![A-Za-z0-9_])_EVENT___EXTENSIONS__(?![A-Za-z0-9_])/EVENT____EXTENSIONS__/g;
s/(?<![A-Za-z0-9_])_EVENT___func__(?![A-Za-z0-9_])/EVENT____func__/g;
s/(?<![A-Za-z0-9_])_EVENT_const(?![A-Za-z0-9_])/EVENT__const/g;
s/(?<![A-Za-z0-9_])_EVENT_inline(?![A-Za-z0-9_])/EVENT__inline/g;
s/(?<![A-Za-z0-9_])_EVENT_pid_t(?![A-Za-z0-9_])/EVENT__pid_t/g;
s/(?<![A-Za-z0-9_])_EVENT_size_t(?![A-Za-z0-9_])/EVENT__size_t/g;
s/(?<![A-Za-z0-9_])_EVENT_socklen_t(?![A-Za-z0-9_])/EVENT__socklen_t/g;
s/(?<![A-Za-z0-9_])_EVENT_ssize_t(?![A-Za-z0-9_])/EVENT__ssize_t/g;
Now there are appropriate "for each event", "for each fd", and "for
each signal" helpers that they can use; this makes the code a bit
simpler, and far less duplicated.
This lets me turn back on the functions I disabled when removing
eventlist.
Additionally, check more lists for circularity in
event_base_assert_ok().
Add typedefs for the callback types.
Name fewer things "ctx".
Adds an implementation of Floyd's tortoise-and-hare algorithm to check
for circularity in TAILQs and LISTs, to avoid the abuse of flags that
event_base_assert_ok() was doing before.
Suggested by Dave Hart.
Those pointers were once used to maintain a complete list of
inserted IO and signal events. But such a list is now available by
walking over ev_io_map and ev_signal_map! So all they did was
require extra pointer operations to maintain, and extra 8-16 bytes
of storage in each struct event.
To be cowardly and keep the option of going back to having this
redundancy, I'm wrapping the removed code in a set of ifdefs.
This is a first cut; it needs cleanups and stress-testing!! In
particular, it just plain disables a couple of functions that could
probably be saved.
There seems to be a need for an evmap_{io,signal}_foreach() or something.
Previously, event_reinit required a bunch of really dubious hacks,
and violated a lot of abstraction barriers to mess around with lists
of internal events and "pretend" to re-add them.
The new (and fairly well commented!) implementation tries to be much
smarter, by isolating the changes as much as possible to the backend
state, and minimizing the amount of abstraction violations.
Specifically, we now use event_del() to remove events we want to
remove, rather than futzing around with queues in event_reinit().
To avoid bogus calls to evsel->del(), we temporarily replace evsel
with a null-object stub.
Also, we now push the responsibility for calling evsel->add() down
into the evmap code, so that we don't actually need to unlink and
re-link all of our events.
This alters event_changelist_del to quash deletion of events that
didn't exist in the first place.
As far as I can see, the add,delete, dispatch case described in the
original comment will never happen. The recorded change is a single
operation, not a queue. This seems to leave actions to delete
events that never existed as the real targets for no-oping
I'm running a fairly simple bit of test code using libevent2 with epoll and
openssl bufferevents and I've run into a 100% cpu usage problem.
Looking into it 100% usage was caused by epoll_wait constantly
returning write events on the openssl socket when it shouldn't really have
been looking for write events at all (N_ACTIVE_CALLBACKS() was returning 0
also).
Looking a bit deeper eventbuffer_openssl socket seems to be requesting
that the EV_WRITE event be removed when it should, but the event isn't
actually being removed from epoll.
Continuing to follow this I think I've found a bug in
event_changelist_del.
For evpoll event_del calls event_changelist_del which caches the change
which is then actioned later when evpoll_dispatch is called.
In event_changlist_del there is a check so that if the currently changed
action is an add then the cached action is changed to a no-op rather than a
delete (which makes sense). The problem arises if there are more than
two add or delete operations between calls to dispatch, in this case it's
possible that the delete is turned into a no-op when it shouldn't have
been.
For example starting with the event on, a delete followed by an add and
then another delete results in a no-op when it should have been a delete (I
added a fair bit of debug output that seems to confirm this behaviour).
I've applied a small change that checks the original old_event stored with
the change and only converts the delete to a no-op if the event isn't on in
old_event. This seems to have fixed my problem.
Of the backends that support edge-triggered IO, most (all?) do not
support attempts to mix edge-triggered and level-triggered IO on the
same FD. With debugging mode enabled, we now detect and refuse attempts
to add a level-triggered IO event to an fd that already has an
edge-triggered IO event, and vice versa.
These structures used TAILQ for the lists of events waiting on a
single fd or signal. But order doesn't matter for these lists; only
the order of the active events lists actually matters.
Remeber, win32 has a socket type that's actually a handle, so if
there's a chance that code is run on win32, we can't use "int" as the
socket type.
This isn't a blind search-and-replace: sometimes an fd is really in
fact for a file, and not a socket at all.
These are old aliases for event_get_fd and event_get_signal, and they
haven't been the preferred way of doing things since 2.0.1-alpha.
For a while, we made them use struct event if it was included, but call
event_get_(fd|signal) if it wasn't. This was entirely too cute.
This is necessary or useful for a few reasons:
1) Sometimes applications will add and delete the same event more
than once between calls to dispatch. Processing these changes
immediately is needless, and potentially expensive (especially
if we're on a system that makes one syscall per changed event).
Yes, this actually happens in practice for nonpathological
code, such as in cases where the user's callback conditionally
re-adds a non-persistent event, or where draining a buffer
turns off writing and invokes a user callback which adds more
data which in turn re-enabled writing.
2) Sometimes we can coalesce multiple changes on the same fd into
a single syscall if we know about them in advance. For
example, epoll can do an add and a delete at the same time, but
only if we have found out about both of them before we tell
epoll.
3) Sometimes adding an event that we immediately delete can cause
unintended consequences: in kqueue, this makes pending events
get reported spuriously.
