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wlr-output-management: Implement version 3 release requests

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Head/mode resources older than version 3 and lacking a release request
are intentionally leaked as this is the only way to fix the race.

Implements: https://gitlab.freedesktop.org/wlroots/wlr-protocols/-/merge_requests/114
This commit is contained in:
Isaac Freund 2022-06-30 14:01:46 +02:00 committed by Simon Ser
parent d3cb6b73a2
commit 4c1afb126b
2 changed files with 63 additions and 21 deletions
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47
protocol/wlr-output-management-unstable-v1.xml
View file

@ -39,7 +39,7 @@
interface version number is reset.
</description>
<interface name="zwlr_output_manager_v1" version="2">
<interface name="zwlr_output_manager_v1" version="3">
<description summary="output device configuration manager">
This interface is a manager that allows reading and writing the current
output device configuration.
@ -115,7 +115,7 @@
</description>
</request>
<event name="finished">
<event name="finished" type="destructor">
<description summary="the compositor has finished with the manager">
This event indicates that the compositor is done sending manager events.
The compositor will destroy the object immediately after sending this
@ -125,7 +125,7 @@
</event>
</interface>
<interface name="zwlr_output_head_v1" version="2">
<interface name="zwlr_output_head_v1" version="3">
<description summary="output device">
A head is an output device. The difference between a wl_output object and
a head is that heads are advertised even if they are turned off. A head
@ -251,14 +251,15 @@
</event>
<event name="finished">
<description summary="the head has been destroyed">
The compositor will destroy the object immediately after sending this
event, so it will become invalid and the client should release any
resources associated with it.
<description summary="the head has disappeared">
This event indicates that the head is no longer available. The head
object becomes inert. Clients should send a destroy request and release
any resources associated with it.
</description>
</event>
<!-- Version 2 additions -->
<event name="make" since="2">
<description summary="head manufacturer">
This event describes the manufacturer of the head.
@ -328,9 +329,18 @@
</description>
<arg name="serial_number" type="string"/>
</event>
<!-- Version 3 additions -->
<request name="release" type="destructor" since="3">
<description summary="destroy the head object">
This request indicates that the client will no longer use this head
object.
</description>
</request>
</interface>
<interface name="zwlr_output_mode_v1" version="2">
<interface name="zwlr_output_mode_v1" version="3">
<description summary="output mode">
This object describes an output mode.
@ -368,15 +378,24 @@
</event>
<event name="finished">
<description summary="the mode has been destroyed">
The compositor will destroy the object immediately after sending this
event, so it will become invalid and the client should release any
resources associated with it.
<description summary="the mode has disappeared">
This event indicates that the mode is no longer available. The mode
object becomes inert. Clients should send a destroy request and release
any resources associated with it.
</description>
</event>
<!-- Version 3 additions -->
<request name="release" type="destructor" since="3">
<description summary="destroy the mode object">
This request indicates that the client will no longer use this mode
object.
</description>
</request>
</interface>
<interface name="zwlr_output_configuration_v1" version="2">
<interface name="zwlr_output_configuration_v1" version="3">
<description summary="output configuration">
This object is used by the client to describe a full output configuration.
@ -494,7 +513,7 @@
</request>
</interface>
<interface name="zwlr_output_configuration_head_v1" version="2">
<interface name="zwlr_output_configuration_head_v1" version="3">
<description summary="head configuration">
This object is used by the client to update a single head's configuration.

37
types/wlr_output_management_v1.c
View file

@ -5,7 +5,7 @@
#include <wlr/util/log.h>
#include "wlr-output-management-unstable-v1-protocol.h"
#define OUTPUT_MANAGER_VERSION 2
#define OUTPUT_MANAGER_VERSION 3
enum {
HEAD_STATE_ENABLED = 1 << 0,
@ -27,6 +27,7 @@ static struct wlr_output_head_v1 *head_from_resource(
return wl_resource_get_user_data(resource);
}
// Can return NULL if the mode is inert
static struct wlr_output_mode *mode_from_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource,
@ -41,11 +42,15 @@ static void head_destroy(struct wlr_output_head_v1 *head) {
struct wl_resource *resource, *tmp;
wl_resource_for_each_safe(resource, tmp, &head->mode_resources) {
zwlr_output_mode_v1_send_finished(resource);
wl_resource_destroy(resource);
wl_list_remove(wl_resource_get_link(resource));
wl_list_init(wl_resource_get_link(resource));
wl_resource_set_user_data(resource, NULL);
}
wl_resource_for_each_safe(resource, tmp, &head->resources) {
zwlr_output_head_v1_send_finished(resource);
wl_resource_destroy(resource);
wl_list_remove(wl_resource_get_link(resource));
wl_list_init(wl_resource_get_link(resource));
wl_resource_set_user_data(resource, NULL);
}
wl_list_remove(&head->link);
wl_list_remove(&head->output_destroy.link);
@ -648,10 +653,19 @@ static void send_mode_state(struct wl_resource *mode_resource,
}
}
static void mode_handle_resource_destroy(struct wl_resource *resource) {
static void output_mode_handle_resource_destroy(struct wl_resource *resource) {
wl_list_remove(wl_resource_get_link(resource));
}
static void output_mode_handle_release(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static const struct zwlr_output_mode_v1_interface output_mode_impl = {
.release = output_mode_handle_release,
};
static struct wl_resource *head_send_mode(struct wlr_output_head_v1 *head,
struct wl_resource *head_resource, struct wlr_output_mode *mode) {
struct wl_client *client = wl_resource_get_client(head_resource);
@ -662,8 +676,8 @@ static struct wl_resource *head_send_mode(struct wlr_output_head_v1 *head,
wl_resource_post_no_memory(head_resource);
return NULL;
}
wl_resource_set_implementation(mode_resource, NULL, mode,
mode_handle_resource_destroy);
wl_resource_set_implementation(mode_resource, &output_mode_impl, mode,
output_mode_handle_resource_destroy);
wl_list_insert(&head->mode_resources, wl_resource_get_link(mode_resource));
zwlr_output_head_v1_send_mode(head_resource, mode_resource);
@ -739,6 +753,15 @@ static void head_handle_resource_destroy(struct wl_resource *resource) {
wl_list_remove(wl_resource_get_link(resource));
}
static void head_handle_release(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static const struct zwlr_output_head_v1_interface head_impl = {
.release = head_handle_release,
};
static void manager_send_head(struct wlr_output_manager_v1 *manager,
struct wlr_output_head_v1 *head, struct wl_resource *manager_resource) {
struct wlr_output *output = head->state.output;
@ -751,7 +774,7 @@ static void manager_send_head(struct wlr_output_manager_v1 *manager,
wl_resource_post_no_memory(manager_resource);
return;
}
wl_resource_set_implementation(head_resource, NULL, head,
wl_resource_set_implementation(head_resource, &head_impl, head,
head_handle_resource_destroy);
wl_list_insert(&head->resources, wl_resource_get_link(head_resource));