293 lines
9.0 KiB
C++
293 lines
9.0 KiB
C++
/*
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* Copyright © 2008 Kristian Høgsberg
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#ifndef WAYLAND_CLIENT_CORE_H
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#define WAYLAND_CLIENT_CORE_H
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#include <stdint.h>
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#include "wayland-util.h"
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#include "wayland-version.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \class wl_proxy
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*
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* \brief Represents a protocol object on the client side.
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*
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* A wl_proxy acts as a client side proxy to an object existing in the
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* compositor. The proxy is responsible for converting requests made by the
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* clients with \ref wl_proxy_marshal() into Wayland's wire format. Events
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* coming from the compositor are also handled by the proxy, which will in
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* turn call the handler set with \ref wl_proxy_add_listener().
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*
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* \note With the exception of function \ref wl_proxy_set_queue(), functions
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* accessing a wl_proxy are not normally used by client code. Clients
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* should normally use the higher level interface generated by the scanner to
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* interact with compositor objects.
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*
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*/
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struct wl_proxy;
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/** \class wl_display
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*
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* \brief Represents a connection to the compositor and acts as a proxy to
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* the wl_display singleton object.
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*
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* A wl_display object represents a client connection to a Wayland
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* compositor. It is created with either \ref wl_display_connect() or
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* \ref wl_display_connect_to_fd(). A connection is terminated using
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* \ref wl_display_disconnect().
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*
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* A wl_display is also used as the \ref wl_proxy for the wl_display
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* singleton object on the compositor side.
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*
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* A wl_display object handles all the data sent from and to the
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* compositor. When a \ref wl_proxy marshals a request, it will write its wire
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* representation to the display's write buffer. The data is sent to the
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* compositor when the client calls \ref wl_display_flush().
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*
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* Incoming data is handled in two steps: queueing and dispatching. In the
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* queue step, the data coming from the display fd is interpreted and
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* added to a queue. On the dispatch step, the handler for the incoming
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* event set by the client on the corresponding \ref wl_proxy is called.
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*
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* A wl_display has at least one event queue, called the <em>default
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* queue</em>. Clients can create additional event queues with \ref
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* wl_display_create_queue() and assign \ref wl_proxy's to it. Events
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* occurring in a particular proxy are always queued in its assigned queue.
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* A client can ensure that a certain assumption, such as holding a lock
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* or running from a given thread, is true when a proxy event handler is
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* called by assigning that proxy to an event queue and making sure that
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* this queue is only dispatched when the assumption holds.
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*
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* The default queue is dispatched by calling \ref wl_display_dispatch().
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* This will dispatch any events queued on the default queue and attempt
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* to read from the display fd if it's empty. Events read are then queued
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* on the appropriate queues according to the proxy assignment.
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*
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* A user created queue is dispatched with \ref wl_display_dispatch_queue().
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* This function behaves exactly the same as wl_display_dispatch()
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* but it dispatches given queue instead of the default queue.
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*
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* A real world example of event queue usage is Mesa's implementation of
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* eglSwapBuffers() for the Wayland platform. This function might need
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* to block until a frame callback is received, but dispatching the default
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* queue could cause an event handler on the client to start drawing
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* again. This problem is solved using another event queue, so that only
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* the events handled by the EGL code are dispatched during the block.
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*
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* This creates a problem where a thread dispatches a non-default
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* queue, reading all the data from the display fd. If the application
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* would call \em poll(2) after that it would block, even though there
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* might be events queued on the default queue. Those events should be
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* dispatched with \ref wl_display_dispatch_pending() or \ref
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* wl_display_dispatch_queue_pending() before flushing and blocking.
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*/
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struct wl_display;
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/** \class wl_event_queue
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*
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* \brief A queue for \ref wl_proxy object events.
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*
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* Event queues allows the events on a display to be handled in a thread-safe
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* manner. See \ref wl_display for details.
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*
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*/
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struct wl_event_queue;
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/** Destroy proxy after marshalling
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* @ingroup wl_proxy
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*/
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#define WL_MARSHAL_FLAG_DESTROY (1 << 0)
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void
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wl_event_queue_destroy(struct wl_event_queue *queue);
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struct wl_proxy *
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wl_proxy_marshal_flags(struct wl_proxy *proxy, uint32_t opcode,
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const struct wl_interface *interface,
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uint32_t version,
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uint32_t flags, ...);
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struct wl_proxy *
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wl_proxy_marshal_array_flags(struct wl_proxy *proxy, uint32_t opcode,
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const struct wl_interface *interface,
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uint32_t version,
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uint32_t flags,
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union wl_argument *args);
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void
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wl_proxy_marshal(struct wl_proxy *p, uint32_t opcode, ...);
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void
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wl_proxy_marshal_array(struct wl_proxy *p, uint32_t opcode,
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union wl_argument *args);
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struct wl_proxy *
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wl_proxy_create(struct wl_proxy *factory,
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const struct wl_interface *interface);
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void *
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wl_proxy_create_wrapper(void *proxy);
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void
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wl_proxy_wrapper_destroy(void *proxy_wrapper);
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struct wl_proxy *
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wl_proxy_marshal_constructor(struct wl_proxy *proxy,
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uint32_t opcode,
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const struct wl_interface *interface,
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...);
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struct wl_proxy *
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wl_proxy_marshal_constructor_versioned(struct wl_proxy *proxy,
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uint32_t opcode,
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const struct wl_interface *interface,
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uint32_t version,
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...);
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struct wl_proxy *
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wl_proxy_marshal_array_constructor(struct wl_proxy *proxy,
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uint32_t opcode, union wl_argument *args,
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const struct wl_interface *interface);
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struct wl_proxy *
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wl_proxy_marshal_array_constructor_versioned(struct wl_proxy *proxy,
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uint32_t opcode,
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union wl_argument *args,
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const struct wl_interface *interface,
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uint32_t version);
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void
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wl_proxy_destroy(struct wl_proxy *proxy);
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int
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wl_proxy_add_listener(struct wl_proxy *proxy,
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void (**implementation)(void), void *data);
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const void *
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wl_proxy_get_listener(struct wl_proxy *proxy);
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int
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wl_proxy_add_dispatcher(struct wl_proxy *proxy,
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wl_dispatcher_func_t dispatcher_func,
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const void * dispatcher_data, void *data);
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void
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wl_proxy_set_user_data(struct wl_proxy *proxy, void *user_data);
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void *
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wl_proxy_get_user_data(struct wl_proxy *proxy);
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uint32_t
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wl_proxy_get_version(struct wl_proxy *proxy);
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uint32_t
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wl_proxy_get_id(struct wl_proxy *proxy);
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void
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wl_proxy_set_tag(struct wl_proxy *proxy,
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const char * const *tag);
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const char * const *
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wl_proxy_get_tag(struct wl_proxy *proxy);
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const char *
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wl_proxy_get_class(struct wl_proxy *proxy);
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void
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wl_proxy_set_queue(struct wl_proxy *proxy, struct wl_event_queue *queue);
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struct wl_display *
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wl_display_connect(const char *name);
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struct wl_display *
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wl_display_connect_to_fd(int fd);
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void
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wl_display_disconnect(struct wl_display *display);
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int
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wl_display_get_fd(struct wl_display *display);
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int
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wl_display_dispatch(struct wl_display *display);
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int
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wl_display_dispatch_queue(struct wl_display *display,
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struct wl_event_queue *queue);
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int
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wl_display_dispatch_queue_pending(struct wl_display *display,
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struct wl_event_queue *queue);
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int
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wl_display_dispatch_pending(struct wl_display *display);
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int
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wl_display_get_error(struct wl_display *display);
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uint32_t
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wl_display_get_protocol_error(struct wl_display *display,
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const struct wl_interface **interface,
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uint32_t *id);
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int
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wl_display_flush(struct wl_display *display);
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int
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wl_display_roundtrip_queue(struct wl_display *display,
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struct wl_event_queue *queue);
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int
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wl_display_roundtrip(struct wl_display *display);
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struct wl_event_queue *
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wl_display_create_queue(struct wl_display *display);
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int
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wl_display_prepare_read_queue(struct wl_display *display,
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struct wl_event_queue *queue);
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int
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wl_display_prepare_read(struct wl_display *display);
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void
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wl_display_cancel_read(struct wl_display *display);
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int
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wl_display_read_events(struct wl_display *display);
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void
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wl_log_set_handler_client(wl_log_func_t handler);
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#ifdef __cplusplus
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}
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#endif
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#endif
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