weston/libweston/weston-log-internal.h
Marius Vlad 8b8b803a46 weston-log: Start adding documentation for the logging/debugging framework
Adds initial grouping for sphinx/breathe for the logging/debugging
framework. We add a few groups: log (public API), internal-log (private API,
not exported) and debug-protocol, specific to the weston
debug protocol.

In latest version of breathe, '\memberof' command is recognized as such.
But it conflicts with '\ingroup' command and can't be used in the same
time (leading to duplicate symbols), so we follow a simple rule: object
tagging with '\ingroup' then use '\memberof' command for the functions
that work on that object.

There's also a caveat here: we have objects that are private (opaque)
but the functions are public. For those cases we resort to using
'internal-log' for the object (class) and 'log' for the functions.

Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
2019-07-18 13:34:04 +03:00

106 lines
3.8 KiB
C

/*
* Copyright © 2019 Collabora Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef WESTON_LOG_INTERNAL_H
#define WESTON_LOG_INTERNAL_H
#include "wayland-util.h"
struct weston_log_subscription;
/** Subscriber allows each type of stream to customize or to provide its own
* methods to manipulate the underlying storage. It follows also an
* object-oriented approach, contains the ops callbacks and a list of
* subcriptions of type weston_log_subscription. Each subscription created will
* be both added to this subscription list and that of the weston_log_scope.
*
* A kind of stream can inherit the subscriber class and provide its own callbacks:
* @code
* struct weston_log_data_stream {
* struct weston_log_subscriber base;
* struct weston_data_stream opaque;
* };
* @endcode
*
* Passing the base class will require container retrieval type of methods
* to be allowed to reach the opaque type (i.e., container_of()).
*
* @ingroup internal-log
*
*/
struct weston_log_subscriber {
/** write the data pointed by @param data */
void (*write)(struct weston_log_subscriber *sub, const char *data, size_t len);
/** For the type of streams that required additional destroy operation
* for destroying the stream */
void (*destroy)(struct weston_log_subscriber *sub);
/** For the type of streams that can inform the 'consumer' part that
* write operation has been terminated/finished and should close the
* stream.
*/
void (*complete)(struct weston_log_subscriber *sub);
struct wl_list subscription_list; /**< weston_log_subscription::owner_link */
};
void
weston_log_subscription_create(struct weston_log_subscriber *owner,
struct weston_log_scope *scope);
void
weston_log_subscription_destroy(struct weston_log_subscription *sub);
struct weston_log_subscription *
weston_log_subscriber_get_only_subscription(struct weston_log_subscriber *subscriber);
void
weston_log_subscription_add(struct weston_log_scope *scope,
struct weston_log_subscription *sub);
void
weston_log_subscription_remove(struct weston_log_subscription *sub);
void
weston_log_bind_weston_debug(struct wl_client *client,
void *data, uint32_t version, uint32_t id);
struct weston_log_scope *
weston_log_get_scope(struct weston_log_context *log_ctx, const char *name);
void
weston_log_run_cb_new_subscriber(struct weston_log_subscription *sub);
void
weston_debug_protocol_advertise_scopes(struct weston_log_context *log_ctx,
struct wl_resource *res);
int
weston_log_ctx_compositor_setup(struct weston_compositor *compositor,
struct weston_log_context *log_ctx);
int
weston_vlog(const char *fmt, va_list ap);
int
weston_vlog_continue(const char *fmt, va_list ap);
#endif /* WESTON_LOG_INTERNAL_H */