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bfc616fc7e
wlr_timeline is a synchronization primitive based on drm_syncobj timelines. They are heavily inspired from Vulkan timeline semaphores [1]. [1]: https://www.khronos.org/blog/vulkan-timeline-semaphores
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
#include <xf86drm.h>
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#include <stdlib.h>
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#include <wlr/render/timeline.h>
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#include <wlr/util/log.h>
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struct wlr_render_timeline {
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int drm_fd;
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uint32_t handle;
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};
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struct wlr_render_timeline *wlr_render_timeline_create(int drm_fd) {
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struct wlr_render_timeline *timeline = calloc(1, sizeof(*timeline));
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if (timeline == NULL) {
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return NULL;
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}
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timeline->drm_fd = drm_fd;
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if (drmSyncobjCreate(drm_fd, 0, &timeline->handle) != 0) {
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wlr_log_errno(WLR_ERROR, "drmSyncobjCreate failed");
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free(timeline);
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return NULL;
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}
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return timeline;
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}
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void wlr_render_timeline_destroy(struct wlr_render_timeline *timeline) {
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drmSyncobjDestroy(timeline->drm_fd, timeline->handle);
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free(timeline);
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}
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int wlr_render_timeline_export_sync_file(struct wlr_render_timeline *timeline,
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uint64_t src_point) {
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int sync_file_fd = -1;
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uint32_t syncobj_handle;
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if (drmSyncobjCreate(timeline->drm_fd, 0, &syncobj_handle) != 0) {
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wlr_log_errno(WLR_ERROR, "drmSyncobjCreate failed");
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return -1;
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}
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if (drmSyncobjTransfer(timeline->drm_fd, syncobj_handle, 0,
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timeline->handle, src_point, 0) != 0) {
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wlr_log_errno(WLR_ERROR, "drmSyncobjTransfer failed");
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goto out;
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}
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if (drmSyncobjExportSyncFile(timeline->drm_fd,
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syncobj_handle, &sync_file_fd) != 0) {
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wlr_log_errno(WLR_ERROR, "drmSyncobjExportSyncFile failed");
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goto out;
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}
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out:
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drmSyncobjDestroy(timeline->drm_fd, syncobj_handle);
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return sync_file_fd;
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}
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bool wlr_render_timeline_import_sync_file(struct wlr_render_timeline *timeline,
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uint64_t dst_point, int sync_file_fd) {
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bool ok = false;
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uint32_t syncobj_handle;
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if (drmSyncobjCreate(timeline->drm_fd, 0, &syncobj_handle) != 0) {
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wlr_log_errno(WLR_ERROR, "drmSyncobjCreate failed");
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return -1;
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}
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if (drmSyncobjImportSyncFile(timeline->drm_fd, syncobj_handle,
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sync_file_fd) != 0) {
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wlr_log_errno(WLR_ERROR, "drmSyncobjImportSyncFile failed");
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goto out;
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}
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if (drmSyncobjTransfer(timeline->drm_fd, timeline->handle, dst_point,
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syncobj_handle, 0, 0) != 0) {
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wlr_log_errno(WLR_ERROR, "drmSyncobjTransfer failed");
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goto out;
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}
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ok = true;
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out:
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drmSyncobjDestroy(timeline->drm_fd, syncobj_handle);
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return ok;
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}
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