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+Name
+
+    EXT_client_sync
+
+Name Strings
+
+    EGL_EXT_client_sync
+
+Contributors
+
+    Daniel Kartch
+
+Contacts
+
+    Daniel Kartch, NVIDIA Corporation (dkartch 'at' nvidia.com)
+
+Status
+
+    Complete
+
+Version
+
+    Version 2, April 20, 2018
+
+Number
+
+    EGL Extension #129
+
+Extension type
+
+    EGL display extension
+
+Dependencies
+
+    Requires EGL_EXT_sync_reuse
+
+Overview
+
+    The EGL_KHR_reusable_sync extension defines an EGL_SYNC_REUSABLE_KHR
+    EGLSync type which is signaled and unsignaled by client events. The
+    EGL_EXT_sync_reuse extension allows all EGLSyncs to become reusable.
+    The signaling behavior associated with EGL_SYNC_REUSABLE_KHR is
+    still desirable, but the name becomes misleading if all EGLSyncs can
+    be reused. This extension defines an EGLSync type with equivalent
+    behavior, separating the signaling mechanism from the reusability.
+
+New Procedures and Functions
+
+    EGLBoolean eglClientSignalSyncEXT(
+                        EGLDisplay dpy,
+                        EGLSync sync,
+                        const EGLAttrib *attrib_list);
+
+New Types
+
+    None
+
+New Tokens
+
+    Accepted by the <type> parameter of eglCreateSync, and returned
+    in <value> when eglGetSyncAttrib is called with <attribute>
+    EGL_SYNC_TYPE:
+
+    EGL_SYNC_CLIENT_EXT                   0x3364
+
+    Returned in <value> when eglGetSyncAttrib is called with attribute
+    EGL_SYNC_CONDITION:
+
+    EGL_SYNC_CLIENT_SIGNAL_EXT            0x3365
+
+Add to the list of sync object decriptions in 3.8.1 Sync Objects
+
+    A <client sync object> reflects the readiness of some client-side
+    state. Sync objects of this type are not visible to API contexts and
+    may not be used with eglWaitSync. They may be waited for with
+    eglClientWaitSync or polled with eglGetSyncAttrib as other sync
+    types.
+
+Add to the end of 3.8.1 Sync Objects
+
+    The command
+
+        EGLBoolean eglClientSignalSyncEXT(EGLDisplay dpy, EGLSync sync,
+            const EGLAttrib *attrib_list);
+
+    may be called to switch sync objects which support it to the
+    signaled state. Currently only sync objects with type
+    EGL_SYNC_CLIENT_EXT provide this support. The attribute list may be
+    used to provide additional information to the signaling operation,
+    as defined for the sync type.
+
+    Errors
+
+        eglClientSignalSyncEXT returns EGL_FALSE on failure, and has no
+        effect on <sync>.
+        If <dpy> is not the name of a valid, initialized EGLDisplay, an
+        EGL_BAD_DISPLAY error is generated.
+        If <sync> is not a valid sync object associated with <dpy>, an
+        EGL_BAD_PARAMETER error is generated.
+        If <attrib_list> contains an attribute name not defined for the
+        type of <sync>, an EGL_BAD_ATTRIBUTE error is generated.
+        If <sync>'s type does not support this direct signaling, an
+        EGL_BAD_ACCESS error is generated.
+
+Insert new subsection in 3.8.1 Sync Objects
+
+    3.8.1.x Creating and Signaling Client Sync Objects
+
+    If type is EGL_SYNC_CLIENT_EXT, a client sync object is created. The
+    EGL_SYNC_STATUS attribute may be specified as either EGL_UNSIGNALED
+    or EGL_SIGNALED, and will default to EGL_UNSIGNALED. No other
+    attributes may be specified for a client sync object. The value of
+    EGL_SYNC_CONDITION will be set to EGL_SYNC_CLIENT_SIGNAL_EXT.
+
+    A client sync object in the unsignaled state will switch to the
+    signaled state when eglClientSignalSyncEXT is called. No attributes
+    are supported for signaling a sync object of this type. Signaling a
+    client sync object which is already in the signaled state will have
+    no effect.
+
+    A client sync object which is in the signaled state may be switched
+    back to the unsignaled state with eglUnsignalSyncEXT. No attributes
+    are supported for unsignaling a sync object of this type.
+
+Add to the error list for eglWaitSync in 3.8.1.3 Waiting for Sync
+Objects
+
+    If <sync> is of type EGL_SYNC_CLIENT_EXT, an EGL_BAD_ACCESS error is
+    generated.
+
+Issues
+
+    None
+
+Revision History
+
+    #2 (April 20, 2018) Daniel Kartch
+       - Renamed to EXT
+       - Fixed missing attrib_list in New Functions section
+       - Eliminated condition as an allowed attribute at creation. This
+         is inconsistent with other sync extensions, and there is no
+         need to make it configurable at this time. Future extensions
+         can make the condition configurable if desired.
+
+    #1 (Feburary 22, 2018) Daniel Kartch
+       - Initial draft as XXX