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https://github.com/hyprwm/wlroots-hyprland.git
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e8d56ca415
Sometimes wlr_session_find_gpus will encounter an error. This is different from finding zero GPUs. On error, wlr_session_find_gpus already returns -1. However, this is casted to size_t, so callers uncorrectly assume this is a success. Instead, make wlr_session_find_gpus return a ssize_t and allow callers to handle the error accordingly.
102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
#ifndef WLR_BACKEND_SESSION_H
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#define WLR_BACKEND_SESSION_H
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#include <libudev.h>
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#include <stdbool.h>
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#include <sys/types.h>
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#include <wayland-server-core.h>
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struct session_impl;
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struct wlr_device {
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int fd;
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dev_t dev;
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struct wl_list link;
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struct {
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struct wl_signal change;
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} events;
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};
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struct wlr_session {
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const struct session_impl *impl;
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/*
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* Signal for when the session becomes active/inactive.
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* It's called when we swap virtual terminal.
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*/
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bool active;
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/*
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* 0 if virtual terminals are not supported
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* i.e. seat != "seat0"
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*/
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unsigned vtnr;
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char seat[256];
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struct udev *udev;
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struct udev_monitor *mon;
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struct wl_event_source *udev_event;
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struct wl_list devices;
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struct wl_display *display;
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struct wl_listener display_destroy;
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struct {
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struct wl_signal active;
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struct wl_signal add_drm_card; // struct wlr_session_add_event
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struct wl_signal destroy;
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} events;
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};
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struct wlr_session_add_event {
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const char *path;
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};
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/*
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* Opens a session, taking control of the current virtual terminal.
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* This should not be called if another program is already in control
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* of the terminal (Xorg, another Wayland compositor, etc.).
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*
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* If logind support is not enabled, you must have CAP_SYS_ADMIN or be root.
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* It is safe to drop privileges after this is called.
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*
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* Returns NULL on error.
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*/
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struct wlr_session *wlr_session_create(struct wl_display *disp);
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/*
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* Closes a previously opened session and restores the virtual terminal.
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* You should call wlr_session_close_file on each files you opened
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* with wlr_session_open_file before you call this.
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*/
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void wlr_session_destroy(struct wlr_session *session);
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/*
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* Opens the file at path.
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* This can only be used to open DRM or evdev (input) devices.
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*
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* When the session becomes inactive:
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* - DRM files lose their DRM master status
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* - evdev files become invalid and should be closed
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*
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* Returns -errno on error.
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*/
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struct wlr_device *wlr_session_open_file(struct wlr_session *session,
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const char *path);
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/*
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* Closes a file previously opened with wlr_session_open_file.
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*/
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void wlr_session_close_file(struct wlr_session *session,
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struct wlr_device *device);
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/*
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* Changes the virtual terminal.
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*/
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bool wlr_session_change_vt(struct wlr_session *session, unsigned vt);
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ssize_t wlr_session_find_gpus(struct wlr_session *session,
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size_t ret_len, struct wlr_device **ret);
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#endif
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