sway-patched-tray-menu-github/include/sway/server.h
Rouven Czerwinski a3a82efbf6 realtime: request SCHED_RR using CAP_SYS_NICE
Try to gain SCHED_RR (round-robin) realtime scheduling privileges before
starting the server. This requires CAP_SYS_NICE on Linux systems.
We additionally register a pthread_atfork callback which resets the
scheduling class back to SCHED_OTHER (the Linux system default).

Due to CAP_SYS_NICE, setting RLIMIT_RTPRIO has no effect on the process
as documented within man 7 sched (from Linux):

  Privileged (CAP_SYS_NICE) threads ignore the RLIMIT_RTPRIO limit;
  as with older kernels, they can make arbitrary changes to
  scheduling policy and priority. See getrlimit(2) for further
  information on RLIMIT_RTPRIO

Note that this requires the sway distribution packagers to set the
CAP_SYS_NICE capability on the sway binary.

Supersedes #6992
2022-05-18 11:20:17 +02:00

178 lines
5.8 KiB
C

#ifndef _SWAY_SERVER_H
#define _SWAY_SERVER_H
#include <stdbool.h>
#include <wayland-server-core.h>
#include <wlr/backend.h>
#include <wlr/backend/session.h>
#include <wlr/render/allocator.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_input_method_v2.h>
#include <wlr/types/wlr_foreign_toplevel_management_v1.h>
#include <wlr/types/wlr_drm_lease_v1.h>
#include <wlr/types/wlr_layer_shell_v1.h>
#include <wlr/types/wlr_output_management_v1.h>
#include <wlr/types/wlr_output_power_management_v1.h>
#include <wlr/types/wlr_presentation_time.h>
#include <wlr/types/wlr_relative_pointer_v1.h>
#include <wlr/types/wlr_session_lock_v1.h>
#include <wlr/types/wlr_server_decoration.h>
#include <wlr/types/wlr_text_input_v3.h>
#include <wlr/types/wlr_xdg_shell.h>
#include "config.h"
#include "list.h"
#if HAVE_XWAYLAND
#include "sway/xwayland.h"
#endif
struct sway_transaction;
struct sway_server {
struct wl_display *wl_display;
struct wl_event_loop *wl_event_loop;
const char *socket;
struct wlr_backend *backend;
// secondary headless backend used for creating virtual outputs on-the-fly
struct wlr_backend *headless_backend;
struct wlr_renderer *renderer;
struct wlr_allocator *allocator;
struct wlr_compositor *compositor;
struct wl_listener compositor_new_surface;
struct wlr_linux_dmabuf_v1 *linux_dmabuf_v1;
struct wlr_data_device_manager *data_device_manager;
struct sway_input_manager *input;
struct wl_listener new_output;
struct wl_listener output_layout_change;
struct wlr_idle *idle;
struct sway_idle_inhibit_manager_v1 *idle_inhibit_manager_v1;
struct wlr_layer_shell_v1 *layer_shell;
struct wl_listener layer_shell_surface;
struct wlr_xdg_shell *xdg_shell;
struct wl_listener xdg_shell_surface;
struct wlr_tablet_manager_v2 *tablet_v2;
#if HAVE_XWAYLAND
struct sway_xwayland xwayland;
struct wl_listener xwayland_surface;
struct wl_listener xwayland_ready;
#endif
struct wlr_relative_pointer_manager_v1 *relative_pointer_manager;
struct wlr_server_decoration_manager *server_decoration_manager;
struct wl_listener server_decoration;
struct wl_list decorations; // sway_server_decoration::link
struct wlr_xdg_decoration_manager_v1 *xdg_decoration_manager;
struct wl_listener xdg_decoration;
struct wl_list xdg_decorations; // sway_xdg_decoration::link
struct wlr_drm_lease_v1_manager *drm_lease_manager;
struct wl_listener drm_lease_request;
struct wlr_presentation *presentation;
struct wlr_pointer_constraints_v1 *pointer_constraints;
struct wl_listener pointer_constraint;
struct wlr_output_manager_v1 *output_manager_v1;
struct wl_listener output_manager_apply;
struct wl_listener output_manager_test;
struct {
bool locked;
struct wlr_session_lock_manager_v1 *manager;
struct wlr_session_lock_v1 *lock;
struct wl_listener lock_new_surface;
struct wl_listener lock_unlock;
struct wl_listener lock_destroy;
struct wl_listener new_lock;
struct wl_listener manager_destroy;
} session_lock;
struct wlr_output_power_manager_v1 *output_power_manager_v1;
struct wl_listener output_power_manager_set_mode;
struct wlr_input_method_manager_v2 *input_method;
struct wlr_text_input_manager_v3 *text_input;
struct wlr_foreign_toplevel_manager_v1 *foreign_toplevel_manager;
struct wlr_xdg_activation_v1 *xdg_activation_v1;
struct wl_listener xdg_activation_v1_request_activate;
// The timeout for transactions, after which a transaction is applied
// regardless of readiness.
size_t txn_timeout_ms;
// Stores a transaction after it has been committed, but is waiting for
// views to ack the new dimensions before being applied. A queued
// transaction is frozen and must not have new instructions added to it.
struct sway_transaction *queued_transaction;
// Stores a pending transaction that will be committed once the existing
// queued transaction is applied and freed. The pending transaction can be
// updated with new instructions as needed.
struct sway_transaction *pending_transaction;
// Stores the nodes that have been marked as "dirty" and will be put into
// the pending transaction.
list_t *dirty_nodes;
};
extern struct sway_server server;
struct sway_debug {
bool noatomic; // Ignore atomic layout updates
bool txn_timings; // Log verbose messages about transactions
bool txn_wait; // Always wait for the timeout before applying
bool noscanout; // Disable direct scan-out
enum {
DAMAGE_DEFAULT, // Default behaviour
DAMAGE_HIGHLIGHT, // Highlight regions of the screen being damaged
DAMAGE_RERENDER, // Render the full output when any damage occurs
} damage;
};
extern struct sway_debug debug;
/* Prepares an unprivileged server_init by performing all privileged operations in advance */
bool server_privileged_prepare(struct sway_server *server);
bool server_init(struct sway_server *server);
void server_fini(struct sway_server *server);
bool server_start(struct sway_server *server);
void server_run(struct sway_server *server);
void restore_nofile_limit(void);
void handle_compositor_new_surface(struct wl_listener *listener, void *data);
void handle_new_output(struct wl_listener *listener, void *data);
void handle_idle_inhibitor_v1(struct wl_listener *listener, void *data);
void handle_layer_shell_surface(struct wl_listener *listener, void *data);
void sway_session_lock_init(void);
void handle_xdg_shell_surface(struct wl_listener *listener, void *data);
#if HAVE_XWAYLAND
void handle_xwayland_surface(struct wl_listener *listener, void *data);
#endif
void handle_server_decoration(struct wl_listener *listener, void *data);
void handle_xdg_decoration(struct wl_listener *listener, void *data);
void handle_pointer_constraint(struct wl_listener *listener, void *data);
void xdg_activation_v1_handle_request_activate(struct wl_listener *listener,
void *data);
void set_rr_scheduling(void);
#endif