}
#endif
+#ifdef EventCallback_incr_ref
+ // Callback forwarded to 'EventCallback.callback'
+ static void signal_cb(evutil_socket_t fd, short events, void *data)
+ {
+ EventCallback handler = data;
+ EventCallback_callback(handler, events);
+ }
+#endif
`}
# Structure to hold information and state for a Libevent dispatch loop.
# Has `self` been correctly initialized?
fun is_valid: Bool do return not address_is_null
+ # Reinitialize the event base after a fork
+ #
+ # Some event mechanisms do not survive across fork.
+ # The event base needs to be reinitialized with the `reinit` method.
+ #
+ # Returns `true` if some events could not be re-added.
+ fun reinit: Bool `{ return event_reinit(self); `}
+
# Event dispatching loop
#
# This loop will run the event base until either there are no more added
- # events, or until something calls `exit_loop`.
+ # events, or until something calls `loopexit`.
fun dispatch `{ event_base_dispatch(self); `}
# Exit the event loop
#
# TODO support timer
- fun exit_loop `{ event_base_loopexit(self, NULL); `}
+ fun loopexit `{ event_base_loopexit(self, NULL); `}
- # Destroy this instance
- fun destroy `{ event_base_free(self); `}
+ redef fun free `{ event_base_free(self); `}
+end
+
+# Event, libevent's basic unit of operation
+extern class NativeEvent `{ struct event * `}
+
+ # Add to the set of pending events
+ #
+ # TODO support timeout
+ fun add `{ event_add(self, NULL); `}
+
+ # Remove from the set of monitored events
+ fun del `{ event_del(self); `}
+
+ redef fun free `{ event_free(self); `}
+end
+
+# Signal event
+extern class NativeEvSignal
+ super NativeEvent
+
+ new (base: NativeEventBase, signal: Int, handler: EventCallback)
+ import EventCallback.callback `{
+ EventCallback_incr_ref(handler);
+ return evsignal_new(base, signal, signal_cb, handler);
+ `}
+end
+
+# Receiver of event callbacks
+interface EventCallback
+
+ # Callback on an event
+ fun callback(events: Int) do end
end
# Spawned to manage a specific connection
do
var evbuffer = bev.input_buffer
var len = evbuffer.length
- var buf = new NativeString(len)
+ var buf = new CString(len)
evbuffer.remove(buf, len)
var str = buf.to_s_with_length(len)
read_callback str
fun event_callback(events: Int): Bool
do
if events & bev_event_error != 0 or events & bev_event_eof != 0 then
- if events & bev_event_error != 0 then print_error "Error from bufferevent"
+ if events & bev_event_error != 0 then
+ var sock_err = evutil_socket_error
+ # Ignore some normal errors and print the others for debugging
+ if sock_err == 110 then
+ # Connection timed out (ETIMEDOUT)
+ else if sock_err == 104 then
+ # Connection reset by peer (ECONNRESET)
+ else
+ print_error "libevent error event: {evutil_socket_error_to_string(sock_err)} ({sock_err})"
+ end
+ end
force_close
return true
end
# connect operation finished.
fun bev_event_connected: Int `{ return BEV_EVENT_CONNECTED; `}
+# Global error code for the last socket operation on the calling thread
+#
+# Not idempotent on all platforms.
+fun evutil_socket_error: Int `{
+ return EVUTIL_SOCKET_ERROR();
+`}
+
+# Convert an error code from `evutil_socket_error` to a string
+fun evutil_socket_error_to_string(error_code: Int): CString `{
+ return evutil_socket_error_to_string(error_code);
+`}
+
# ---
# Options that can be specified when creating a `NativeBufferEvent`
# Set callbacks to `read_callback_native`, `write_callback` and `event_callback` of `conn`
fun setcb(conn: Connection) import Connection.read_callback_native,
- Connection.write_callback, Connection.event_callback, NativeString `{
+ Connection.write_callback, Connection.event_callback, CString `{
Connection_incr_ref(conn);
bufferevent_setcb(self,
(bufferevent_data_cb)c_read_cb,
`}
# Write `length` bytes of `line`
- fun write(line: NativeString, length: Int): Int `{
+ fun write(line: CString, length: Int): Int `{
return bufferevent_write(self, line, length);
`}
fun length: Int `{ return evbuffer_get_length(self); `}
# Read data from an evbuffer and drain the bytes read
- fun remove(buffer: NativeString, len: Int) `{
+ fun remove(buffer: CString, len: Int) `{
evbuffer_remove(self, buffer, len);
`}
end
# A listener acting on an interface and port, spawns `Connection` on new connections
extern class ConnectionListener `{ struct evconnlistener * `}
- private new bind_to(base: NativeEventBase, address: NativeString, port: Int, factory: ConnectionFactory)
+ private new bind_to(base: NativeEventBase, address: CString, port: Int, factory: ConnectionFactory)
import ConnectionFactory.accept_connection, error_callback `{
struct sockaddr_in sin;
# Callback method on listening error
fun error_callback do
- var cstr = socket_error
- sys.stderr.write "libevent error: '{cstr}'"
+ var cstr = evutil_socket_error_to_string(evutil_socket_error)
+ print_error "libevent error: '{cstr}'"
end
-
- # Error with sockets
- fun socket_error: NativeString `{
- // TODO move to Nit and maybe NativeEventBase
- int err = EVUTIL_SOCKET_ERROR();
- return evutil_socket_error_to_string(err);
- `}
end
# Factory to listen on sockets and create new `Connection`
# Human representation of remote client address
var addr_len = 46 # Longest possible IPv6 address + null byte
- var addr_buf = new NativeString(addr_len)
+ var addr_buf = new CString(addr_len)
addr_buf = addrin_to_address(addrin, addr_buf, addr_len)
var addr = if addr_buf.address_is_null then
"Unknown address"
end
# Put string representation of source `address` into `buf`
- private fun addrin_to_address(address: Pointer, buf: NativeString, buf_len: Int): NativeString `{
+ private fun addrin_to_address(address: Pointer, buf: CString, buf_len: Int): CString `{
struct sockaddr *addrin = (struct sockaddr*)address;
if (addrin->sa_family == AF_INET) {
return NULL;
`}
end
+
+# Enable some relatively expensive debugging checks that would normally be turned off
+fun enable_debug_mode `{ event_enable_debug_mode(); `}
+
+# Use Windows builtin locking and thread ID functions
+fun use_windows_threads: Bool `{
+#ifdef EVTHREAD_USE_WINDOWS_THREADS_IMPLEMENTED
+ return evthread_use_windows_threads();
+#else
+ return -1;
+#endif
+`}
+
+# Use Pthreads locking and thread ID functions
+fun use_pthreads: Bool `{
+#ifdef EVTHREAD_USE_PTHREADS_IMPLEMENTED
+ return evthread_use_pthreads();
+#else
+ return -1;
+#endif
+`}