diff options
Diffstat (limited to 'backend/backend.c')
| -rw-r--r-- | backend/backend.c | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/backend/backend.c b/backend/backend.c index 1cdddd16..00d77cd2 100644 --- a/backend/backend.c +++ b/backend/backend.c @@ -33,6 +33,8 @@ #include <wlr/backend/x11.h> #endif +#define WAIT_SESSION_TIMEOUT 10000 // ms + void wlr_backend_init(struct wlr_backend *backend, const struct wlr_backend_impl *impl) { assert(backend); @@ -106,6 +108,52 @@ struct wlr_session *wlr_backend_get_session(struct wlr_backend *backend) { return NULL; } +static uint64_t get_current_time_ms(void) { + struct timespec ts = {0}; + clock_gettime(CLOCK_MONOTONIC, &ts); + return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; +} + +static struct wlr_session *session_create_and_wait(struct wl_display *disp) { + struct wlr_session *session = wlr_session_create(disp); + + if (!session) { + wlr_log(WLR_ERROR, "Failed to start a session"); + return NULL; + } + + if (!session->active) { + wlr_log(WLR_INFO, "Waiting for a session to become active"); + + uint64_t started_at = get_current_time_ms(); + uint64_t timeout = WAIT_SESSION_TIMEOUT; + struct wl_event_loop *event_loop = + wl_display_get_event_loop(session->display); + + while (!session->active) { + int ret = wl_event_loop_dispatch(event_loop, (int)timeout); + if (ret < 0) { + wlr_log_errno(WLR_ERROR, "Failed to wait for session active: " + "wl_event_loop_dispatch failed"); + return NULL; + } + + uint64_t now = get_current_time_ms(); + if (now >= started_at + WAIT_SESSION_TIMEOUT) { + break; + } + timeout = started_at + WAIT_SESSION_TIMEOUT - now; + } + + if (!session->active) { + wlr_log(WLR_ERROR, "Timeout waiting session to become active"); + return NULL; + } + } + + return session; +} + clockid_t wlr_backend_get_presentation_clock(struct wlr_backend *backend) { if (backend->impl->get_presentation_clock) { return backend->impl->get_presentation_clock(backend); @@ -269,7 +317,7 @@ static struct wlr_backend *attempt_backend_by_name(struct wl_display *display, } else if (strcmp(name, "drm") == 0 || strcmp(name, "libinput") == 0) { // DRM and libinput need a session if (!*session) { - *session = wlr_session_create(display); + *session = session_create_and_wait(display); if (!*session) { wlr_log(WLR_ERROR, "failed to start a session"); return NULL; @@ -368,7 +416,7 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display) { #endif // Attempt DRM+libinput - multi->session = wlr_session_create(display); + multi->session = session_create_and_wait(display); if (!multi->session) { wlr_log(WLR_ERROR, "Failed to start a DRM session"); wlr_backend_destroy(backend); |