egl: Add support for EGL_KHR_reusable_sync.

Individual drivers still need to support and enable the extension.

1 files changed, 119 insertions, 0 deletions

diff --git a/src/egl/main/eglsync.h b/src/egl/main/eglsync.h
new file mode 100644
index 0000000000..a0134784aa
--- /dev/null
+++ b/src/egl/main/eglsync.h
@@ -0,0 +1,119 @@
+#ifndef EGLSYNC_INCLUDED
+#define EGLSYNC_INCLUDED
+
+
+#include "egltypedefs.h"
+#include "egldisplay.h"
+
+
+#ifdef EGL_KHR_reusable_sync
+
+
+/**
+ * "Base" class for device driver syncs.
+ */
+struct _egl_sync
+{
+   /* A sync is a display resource */
+   _EGLResource Resource;
+
+   EGLenum Type;
+   EGLenum SyncStatus;
+};
+
+
+PUBLIC EGLBoolean
+_eglInitSync(_EGLSync *sync, _EGLDisplay *dpy, EGLenum type,
+             const EGLint *attrib_list);
+
+
+extern _EGLSync *
+_eglCreateSyncKHR(_EGLDriver *drv, _EGLDisplay *dpy,
+                  EGLenum type, const EGLint *attrib_list);
+
+
+extern EGLBoolean
+_eglDestroySyncKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync);
+
+
+extern EGLint
+_eglClientWaitSyncKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
+                      EGLint flags, EGLTimeKHR timeout);
+
+
+extern EGLBoolean
+_eglSignalSyncKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
+                  EGLenum mode);
+
+
+extern EGLBoolean
+_eglGetSyncAttribKHR(_EGLDriver *drv, _EGLDisplay *dpy, _EGLSync *sync,
+                     EGLint attribute, EGLint *value);
+
+
+/**
+ * Link a sync to a display and return the handle of the link.
+ * The handle can be passed to client directly.
+ */
+static INLINE EGLSyncKHR
+_eglLinkSync(_EGLSync *sync, _EGLDisplay *dpy)
+{
+   _eglLinkResource(&sync->Resource, _EGL_RESOURCE_SYNC, dpy);
+   return (EGLSyncKHR) sync;
+}
+
+
+/**
+ * Unlink a linked sync from its display.
+ */
+static INLINE void
+_eglUnlinkSync(_EGLSync *sync)
+{
+   _eglUnlinkResource(&sync->Resource, _EGL_RESOURCE_SYNC);
+}
+
+
+/**
+ * Lookup a handle to find the linked sync.
+ * Return NULL if the handle has no corresponding linked sync.
+ */
+static INLINE _EGLSync *
+_eglLookupSync(EGLSyncKHR handle, _EGLDisplay *dpy)
+{
+   _EGLSync *sync = (_EGLSync *) handle;
+   if (!dpy || !_eglCheckResource((void *) sync, _EGL_RESOURCE_SYNC, dpy))
+      sync = NULL;
+   return sync;
+}
+
+
+/**
+ * Return the handle of a linked sync, or EGL_NO_SYNC_KHR.
+ */
+static INLINE EGLSyncKHR
+_eglGetSyncHandle(_EGLSync *sync)
+{
+   _EGLResource *res = (_EGLResource *) sync;
+   return (res && _eglIsResourceLinked(res)) ?
+      (EGLSyncKHR) sync : EGL_NO_SYNC_KHR;
+}
+
+
+/**
+ * Return true if the sync is linked to a display.
+ *
+ * The link is considered a reference to the sync (the display is owning the
+ * sync).  Drivers should not destroy a sync when it is linked.
+ */
+static INLINE EGLBoolean
+_eglIsSyncLinked(_EGLSync *sync)
+{
+   _EGLResource *res = (_EGLResource *) sync;
+   return (res && _eglIsResourceLinked(res));
+}
+
+
+#endif /* EGL_KHR_reusable_sync */
+
+
+#endif /* EGLSYNC_INCLUDED */