This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
#include "includes.h"
#include "lib/events/events.h"
#include "lib/events/events_internal.h"
+#include "lib/util/dlinklist.h"
+#include "param/param.h"
+#if _SAMBA_BUILD_
+#include "build.h"
+#endif
+
+struct event_ops_list {
+ struct event_ops_list *next, *prev;
+ const char *name;
+ const struct event_ops *ops;
+};
+
+/* list of registered event backends */
+static struct event_ops_list *event_backends;
+
+static char *event_default_backend = NULL;
+
+/*
+ register an events backend
+*/
+bool event_register_backend(const char *name, const struct event_ops *ops)
+{
+ struct event_ops_list *e;
+ e = talloc(talloc_autofree_context(), struct event_ops_list);
+ if (e == NULL) return False;
+ e->name = name;
+ e->ops = ops;
+ DLIST_ADD(event_backends, e);
+ return True;
+}
+
+/*
+ set the default event backend
+ */
+void event_set_default_backend(const char *backend)
+{
+ if (event_default_backend) free(event_default_backend);
+ event_default_backend = strdup(backend);
+}
+
+/*
+ initialise backends if not already done
+*/
+static void event_backend_init(void)
+{
+#if _SAMBA_BUILD_
+ init_module_fn static_init[] = STATIC_LIBEVENTS_MODULES;
+ init_module_fn *shared_init;
+ if (event_backends) return;
+ shared_init = load_samba_modules(NULL, "LIBEVENTS");
+ run_init_functions(static_init);
+ run_init_functions(shared_init);
+#else
+ bool events_standard_init(void);
+ bool events_select_init(void);
+ events_select_init();
+ events_standard_init();
+#if HAVE_EVENTS_EPOLL
+ {
+ bool events_epoll_init(void);
+ events_epoll_init();
+ }
+#endif
+#endif
+}
+
+/*
+ list available backends
+*/
+const char **event_backend_list(TALLOC_CTX *mem_ctx)
+{
+ const char **list = NULL;
+ struct event_ops_list *e;
+
+ event_backend_init();
+
+ for (e=event_backends;e;e=e->next) {
+ list = str_list_add(list, e->name);
+ }
+
+ talloc_steal(mem_ctx, list);
+
+ return list;
+}
/*
create a event_context structure for a specific implemementation.
NOTE: use event_context_init() inside of samba!
*/
-struct event_context *event_context_init_ops(TALLOC_CTX *mem_ctx, const struct event_ops *ops, void *private_data)
+static struct event_context *event_context_init_ops(TALLOC_CTX *mem_ctx,
+ const struct event_ops *ops)
{
struct event_context *ev;
int ret;
ev->ops = ops;
- ret = ev->ops->context_init(ev, private_data);
+ ret = ev->ops->context_init(ev);
if (ret != 0) {
talloc_free(ev);
return NULL;
return ev;
}
+/*
+ create a event_context structure. This must be the first events
+ call, and all subsequent calls pass this event_context as the first
+ element. Event handlers also receive this as their first argument.
+*/
+struct event_context *event_context_init_byname(TALLOC_CTX *mem_ctx, const char *name)
+{
+ struct event_ops_list *e;
+
+ event_backend_init();
+
+#if _SAMBA_BUILD_
+ if (name == NULL) {
+ name = lp_parm_string(-1, "event", "backend");
+ }
+#endif
+ if (name == NULL) {
+ name = event_default_backend;
+ }
+ if (name == NULL) {
+ name = "standard";
+ }
+
+ for (e=event_backends;e;e=e->next) {
+ if (strcmp(name, e->name) == 0) {
+ return event_context_init_ops(mem_ctx, e->ops);
+ }
+ }
+ return NULL;
+}
+
+
/*
create a event_context structure. This must be the first events
call, and all subsequent calls pass this event_context as the first
*/
struct event_context *event_context_init(TALLOC_CTX *mem_ctx)
{
- const struct event_ops *ops = event_standard_get_ops();
- return event_context_init_ops(mem_ctx, ops, NULL);
+ return event_context_init_byname(mem_ctx, NULL);
}
/*
add a fd based event
return NULL on failure (memory allocation error)
+
+ if flags contains EVENT_FD_AUTOCLOSE then the fd will be closed when
+ the returned fd_event context is freed
*/
struct fd_event *event_add_fd(struct event_context *ev, TALLOC_CTX *mem_ctx,
int fd, uint16_t flags, event_fd_handler_t handler,
return ev->ops->add_fd(ev, mem_ctx, fd, flags, handler, private_data);
}
+/*
+ add a disk aio event
+*/
+struct aio_event *event_add_aio(struct event_context *ev,
+ TALLOC_CTX *mem_ctx,
+ struct iocb *iocb,
+ event_aio_handler_t handler,
+ void *private_data)
+{
+ if (ev->ops->add_aio == NULL) return NULL;
+ return ev->ops->add_aio(ev, mem_ctx, iocb, handler, private_data);
+}
+
/*
return the fd event flags
*/
uint16_t event_get_fd_flags(struct fd_event *fde)
{
+ if (!fde) return 0;
return fde->event_ctx->ops->get_fd_flags(fde);
}
*/
void event_set_fd_flags(struct fd_event *fde, uint16_t flags)
{
+ if (!fde) return;
fde->event_ctx->ops->set_fd_flags(fde, flags);
}
return ev->ops->add_timed(ev, mem_ctx, next_event, handler, private_data);
}
+/*
+ add a signal event
+
+ sa_flags are flags to sigaction(2)
+
+ return NULL on failure
+*/
+struct signal_event *event_add_signal(struct event_context *ev, TALLOC_CTX *mem_ctx,
+ int signum,
+ int sa_flags,
+ event_signal_handler_t handler,
+ void *private_data)
+{
+ return ev->ops->add_signal(ev, mem_ctx, signum, sa_flags, handler, private_data);
+}
+
/*
do a single event loop using the events defined in ev
*/
-int event_loop_once(struct event_context *ev)
+_PUBLIC_ int event_loop_once(struct event_context *ev)
{
return ev->ops->loop_once(ev);
}
find an event context that is a parent of the given memory context,
or create a new event context as a child of the given context if
none is found
+
+ This should be used in preference to event_context_init() in places
+ where you would prefer to use the existing event context if possible
+ (which is most situations)
*/
struct event_context *event_context_find(TALLOC_CTX *mem_ctx)
{
struct event_context *ev = talloc_find_parent_bytype(mem_ctx, struct event_context);
- if (ev == NULL) {
+ if (ev == NULL) {
ev = event_context_init(mem_ctx);
}
return ev;
git.samba.org / kai / samba-autobuild / .git / blobdiff