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-% Copyright 1991 by Olivetti Research Limited, Cambridge, England and
-% Digital Equipment Corporation, Maynard, Massachusetts.
-%
-%                        All Rights Reserved
-%
-% Permission to use, copy, modify, and distribute this software and its 
-% documentation for any purpose and without fee is hereby granted, 
-% provided that the above copyright notice appear in all copies and that
-% both that copyright notice and this permission notice appear in 
-% supporting documentation, and that the names of Digital or Olivetti
-% not be used in advertising or publicity pertaining to distribution of the
-% software without specific, written prior permission.  
-%
-% DIGITAL AND OLIVETTI DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
-% INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT
-% SHALL THEY BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-% ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
-% IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
-% OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
-%\documentstyle[a4]{article}
-\documentstyle{article}
-
-\setlength{\parindent}{0 pt}
-\setlength{\parskip}{6pt}
-
-% Protocol Section
-% For the DP book, these four should be assigned the font for global symbols.
-
-\newcommand{\request}[1]{{\bf #1}}
-\newcommand{\event}[1]{{\bf #1}}
-\newcommand{\error}[1]{{\bf #1}}
-\newcommand{\enum}[1]{{\bf #1}}
-
-% The following fonts are not reassigned for the DP book.
-
-\newcommand{\system}[1]{{\sc #1}}
-\newcommand{\param}[1]{{\it #1}}
-
-\newcommand{\eventdef}[1]{\item {\bf#1}}
-\newcommand{\requestdef}[1]{\item {\bf#1}}
-\newcommand{\errordef}[1]{\item {\bf#1}}
-
-\newcommand{\defn}[1]{{\bf #1}}
-
-\newcommand{\tabstopsA}{\hspace*{4cm}\=\hspace*{1cm}\=\hspace*{7cm}\=\kill}
-\newcommand{\tabstopsB}{\hspace*{1cm}\=\hspace*{1cm}\=\hspace*{3cm}\=\kill}
-\newcommand{\tabstopsC}{\hspace*{1cm}\=\hspace*{1cm}\=\hspace*{5cm}\=\kill}
-
-% commands for formatting the API
-% For the DP book, these three should be assigned the font for global symbols.
-
-\newcommand{\cfunctionname}[1]{\mbox{\tt#1}}
-\newcommand{\ctypename}[1]{\mbox{\tt#1}}
-\newcommand{\cconst}[1]{\mbox{\tt#1}}
-
-% For the DP book, within function definitions, the type and name are in
-% the ordinary font; therefore, ctypenamedef and cfunctionnamedef are used
-% and defined below.
-\newcommand{\ctypenamedef}[1]{\mbox{#1}}
-\newcommand{\cfunctionnamedef}[1]{\mbox{#1}}
-\newcommand{\cargname}[1]{\mbox{\it#1}}
-\newcommand{\cstartfunction}[2]{\begin{sloppypar}\begin{samepage}\ctypenamedef{#1}\\ \cfunctionnamedef{#2}\ (}
-\newcommand{\cargdecl}[2]{\penalty -1\ctypenamedef{#1} \cargname{#2}}
-\newcommand{\cendfunctiondecl}{){\hangafter=2 \hangindent=20pt \raggedright\par}}
-\newcommand{\cendfuncdescription}{\end{samepage}\end{sloppypar}}
-
-\newcommand{\cstartmacro}[2]{\begin{sloppypar}\begin{samepage}\ctypenamedef{#1}\\ \cfunctionnamedef{#2}\ (}
-\newcommand{\cendmacrodecl}{)\par}
-\newcommand{\cendmacrodescription}{\end{samepage}\end{sloppypar}}
-
-% make things easier with all the long names
-\spaceskip .3333em plus 5em
-\tolerance=2000
-
-\begin{document}
-
-\begin{center}
-
-{\large X Synchronization Extension Library}\\[10pt]
-{\large Version 3.0}\\[15pt]
-{\large X Consortium Standard}\\[15pt]
-{\large X Version 11, Release 6.8}\\[15pt]
-{\it Tim Glauert}\\[0pt]
-{\tt thg@cam-orl.co.uk}\\[0pt]
-{\bf Olivetti Research / MultiWorks}\\[5pt]
-{\it Dave Carver}\\[0pt]
-{\tt dcc@athena.mit.edu}\\[0pt]
-{\bf Digital Equipment Corporation,}\\[0pt]
-{\bf MIT / Project Athena}\\[5pt]
-{\it Jim Gettys}\\[0pt]
-{\tt jg@crl.dec.com}\\[0pt]
-{\bf Digital Equipment Corporation,}\\[0pt]
-{\bf Cambridge Research Laboratory}\\[5pt]
-{\it David P. Wiggins}\\[0pt]
-{\tt dpw@x.org}\\[0pt]
-{\bf X Consortium, Inc.}\\[0pt]
-
-\end {center}
-
-Copyright 1991 by Olivetti Research Limited, Cambridge, England and
-Digital Equipment Corporation, Maynard, Massachusetts.
-
-{\small Permission to use, copy, modify, and distribute this documentation
-for any purpose and without fee is hereby granted, provided that the above
-copyright notice appear in all copies. Olivetti, Digital, MIT, and the
-X Consortium
-make no representations about the suitability for any purpose of the
-information in this document. This documentation is provided as is without
-express or implied warranty.}
-
-Copyright (c) 1991 X Consortium, Inc.
-
-{\small Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the ``Software''), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
-X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from the X Consortium.}
-\eject
-
-\section{Synchronization Protocol}
-
-The core X protocol makes no guarantees about the relative order of execution
-of requests for different clients. This means that any synchronization between
-clients must be done at the client level in an operating system-dependent and
-network-dependent manner. Even if there was an accepted standard for such
-synchronization, the use of a network introduces unpredictable delays between
-the synchronization of the clients and the delivery of the resulting requests
-to the X server.
-
-The core X protocol also makes no guarantees about the time at which requests
-are executed, which means that all clients with real-time constraints must
-implement their timing on the host computer. Any such timings are subject to
-error introduced by delays within the operating system and network and are
-inefficient because of the need for round-trip requests that keep the client and
-server synchronized.
-
-The synchronization extension provides primitives that allow synchronization
-between clients to take place entirely within the X server. This removes any
-error introduced by the network and makes it possible to synchronize clients
-on different hosts running different operating systems. This is important for
-multimedia applications, where audio, video, and graphics data streams are
-being synchronized. The extension also provides internal timers within the X
-server to which client requests can be synchronized. This allows simple
-animation applications to be implemented without any round-trip requests and
-makes best use of buffering within the client, network, and server.
-
-\subsection{Description}
-
-The mechanism used by this extension for synchronization within the X server
-is to block the processing of requests from a client until a specific
-synchronization condition occurs. When the condition occurs, the client is
-released and processing of requests continues. Multiple clients may block on
-the same condition to give inter-client synchronization.  Alternatively, a
-single client may block on a condition such as an animation frame marker.
-
-The extension adds \defn{Counter} and \defn{Alarm} to the set of resources
-managed by the server. A counter has a 64-bit integer value that may be
-increased or decreased by client requests or by the server internally. A
-client can block by sending an \request{Await} request that waits until
-one of a set of synchronization conditions, called TRIGGERs, becomes TRUE.
-
-The \request{CreateCounter} request allows a client to create a
-\defn{Counter} that can be changed by explicit \request{SetCounter} and
-\request{ChangeCounter} requests. These can be used to implement
-synchronization between different clients.
-
-There are some counters, called \defn{System Counters}, that are changed by
-the server internally rather than by client requests. The effect of any change
-to a system counter is not visible until the server has finished processing the
-current request. In other words, system counters are apparently updated in the
-gaps between the execution of requests rather than during the actual execution
-of a request. The extension provides a system counter that advances with the
-server time as defined by the core protocol, and it may also provide counters
-that advance with the real-world time or that change each time the CRT
-screen is refreshed.  Other extensions may provide their own
-extension-specific system counters.
-
-The extension provides an \defn{Alarm} mechanism that allows clients to
-receive an event on a regular basis when a particular counter is changed.
-
-\section{C Language Binding}
-
-The C routines provide direct access to	the protocol and add
-no additional semantics.
-
-The include file for this extension is \verb|<X11/extensions/sync.h>|.
-
-Most of the names in the language binding are derived from the
-protocol names by prepending \cfunctionname{XSync} to the protocol name and changing
-the capitalization.
-
-\subsection{C Functions}
-
-Most of the following functions generate SYNC protocol requests.
-
-% start marker
-\cstartfunction{Status}{XSyncQueryExtension}
-\cargdecl{Display *}{dpy},
-\cargdecl{int *}{event\_base\_return},
-\cargdecl{int *}{error\_base\_return}
-\cendfunctiondecl
-% end marker
-
-If dpy supports the SYNC extension, \cfunctionname{XSyncQueryExtension}
-returns \cconst{True}, sets *event\_base\_return to the event number for the
-first SYNC event, and sets
-*error\_base\_return to the error number for the first SYNC
-error.  If dpy does not support the SYNC extension, it
-returns \cconst{False}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncInitialize}
-\cargdecl{Display *}{dpy},
-\cargdecl{int *}{major\_version\_return},
-\cargdecl{int *}{minor\_version\_return}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncInitialize} sets *major\_version\_return and
-*minor\_version\_return to the major/minor SYNC protocol
-version supported by the server.  If the XSync library is compatible
-with the version returned by the server, this function returns \cconst{True}.
-If dpy does not support the SYNC extension, or if there was an error during
-communication with the server, or if the server and library protocol
-versions are incompatible, this function returns \cconst{False}.  The only
-XSync function that may be called before this function is
-\cfunctionname{XSyncQueryExtension}.  If a client violates this rule,
-the effects of all XSync calls that it makes are undefined.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{XSyncSystemCounter *}{XSyncListSystemCounters}
-\cargdecl{Display *}{dpy},
-\cargdecl{int *}{n\_counters\_return}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncListSystemCounters} returns a pointer to an
-array of system counters supported by the display and sets 
-*n\_counters\_return to the number of
-counters in the array.  The array should be freed with
-\cfunctionname{XSyncFreeSystemCounterList}.  If dpy does not
-support the SYNC extension,
-or if there was an error during communication with the
-server, or if the server does not support any system counters, this
-function returns NULL.
-
-\ctypename{XSyncSystemCounter} has the following fields:
-
-\begin{tabular}{lll}
-char * & name; & /* null-terminated name of system counter */\\
-XSyncCounter & counter; & /* counter id of this system counter */\\
-XSyncValue & resolution; & /* resolution of this system counter */\\
-\end{tabular}
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{void}{XSyncFreeSystemCounterList}
-\cargdecl{XSyncSystemCounter *}{list}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncFreeSystemCounterList} frees the memory associated 
-with the system counter list returned by \cfunctionname{XSyncListSystemCounters}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{XSyncCounter}{XSyncCreateCounter}
-\cargdecl{Display *}{dpy}, 
-\cargdecl{XSyncValue}{initial\_value}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncCreateCounter} creates a counter on the dpy
-with the given initial\_value and returns the counter ID. 
-It returns \cconst{None} if dpy does not
-support the SYNC extension.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncSetCounter}
-\cargdecl{Display *}{dpy},
-\cargdecl{XSyncCounter}{counter},
-\cargdecl{XSyncValue}{value}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncSetCounter} sets counter to value.  
-It returns \cconst{False} if dpy does not support the SYNC extension;
-otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncChangeCounter}
-\cargdecl{Display *}{dpy},
-\cargdecl{XSyncCounter}{counter},
-\cargdecl{XSyncValue}{value}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncChangeCounter} adds value to counter.
-It returns \cconst{False} if dpy does not support the SYNC extension;
-otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncDestroyCounter}
-\cargdecl{Display *}{dpy}, 
-\cargdecl{XSyncCounter}{counter}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncDestroyCounter} destroys counter. 
-It returns \cconst{False} if dpy does not
-support the SYNC extension; otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncQueryCounter}
-\cargdecl{Display *}{dpy},
-\cargdecl{XSyncCounter}{counter},
-\cargdecl{XSyncValue *}{value\_return}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncQueryCounter} sets *value\_return to the current value of
-counter.  It returns \cconst{False} if there was an error during
-communication with the server or if dpy does not support
-the SYNC extension; otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncAwait}
-\cargdecl{Display *}{dpy},
-\cargdecl{XSyncWaitCondition *}{wait\_list},
-\cargdecl{int}{n\_conditions}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncAwait} awaits on the conditions in wait\_list.
-The n\_conditions is the number of wait conditions in
-wait\_list.  It returns \cconst{False} if dpy does not
-support the SYNC extension; otherwise, it returns \cconst{True}.
-The await is processed asynchronously by the server;
-this function always returns immediately
-after issuing the request.
-
-\ctypename{XSyncWaitCondition} has the following fields:
-
-\begin{tabular}{lll}
-XSyncCounter & trigger.counter; & /* counter to trigger on */ \\
-XSyncValueType & trigger.value\_type; & /* absolute/relative */ \\
-XSyncValue & trigger.wait\_value; & /* value to compare counter to */ \\
-XSyncTestType & trigger.test\_type;	& /* pos/neg comparison/transtion */ \\
-XSyncValue & event\_threshold; & /* send event if past threshold */ \\
-\end{tabular}
-
-\ctypename{XSyncValueType} can be either \cconst{XSyncAbsolute} or \cconst{XSyncRelative}.
-
-\ctypename{XSyncTestType} can be one of \cconst{XSyncPositiveTransition},
-\cconst{XSyncNegativeTransition}, \cconst{XSyncPositiveComparison}, or
-\cconst{XSyncNegativeComparison}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{XSyncAlarm}{XSyncCreateAlarm}
-\cargdecl{Display *}{dpy},
-\cargdecl{unsigned long}{values\_mask},
-\cargdecl{XSyncAlarmAttributes *}{values}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncCreateAlarm} creates an alarm and returns the alarm ID.
-It returns \cconst{None} if the display does not support the SYNC extension. 
-The values\_mask and values specify the alarm attributes.
-
-\ctypename{XSyncAlarmAttributes} has the following fields.  The attribute\_mask
-column specifies the symbol that the caller should OR into
-values\_mask to indicate that the value for the corresponding
-attribute was actually supplied.  Default values are used for all
-attributes that do not have their attribute\_mask OR'ed into 
-values\_mask.
-See the protocol
-description for \request{CreateAlarm} for the defaults.
-
-\begin{tabular}{lll}
-type & field name & attribute\_mask \\
-XSyncCounter & trigger.counter; & \cconst{XSyncCACounter} \\
-XSyncValueType & trigger.value\_type; & \cconst{XSyncCAValueType} \\
-XSyncValue & trigger.wait\_value; & \cconst{XSyncCAValue} \\
-XSyncTestType & trigger.test\_type; & \cconst{XSyncCATestType} \\
-XSyncValue & delta;	& \cconst{XSyncCADelta} \\
-Bool & events; & \cconst{XSyncCAEvents} \\
-XSyncAlarmState & state; & client cannot set this \\
-\end{tabular}
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncDestroyAlarm}
-\cargdecl{Display *}{dpy},
-\cargdecl{XSyncAlarm}{alarm}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncDestroyAlarm} destroys alarm. 
-It returns \cconst{False} if dpy does not
-support the SYNC extension; otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncQueryAlarm}
-\cargdecl{Display *}{dpy},
-\cargdecl{XSyncAlarm}{alarm},
-\cargdecl{XSyncAlarmAttributes *}{values\_return}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncQueryAlarm} sets *values\_return to the alarm's
-attributes.  It returns \cconst{False} if there was an error 
-during communication with the server or if dpy does not support 
-the SYNC extension; otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncChangeAlarm}
-\cargdecl{Display *}{dpy},
-\cargdecl{XSyncAlarm}{alarm},
-\cargdecl{unsigned long}{values\_mask},
-\cargdecl{XSyncAlarmAttributes *}{values}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncChangeAlarm} changes alarm's attributes.
-The attributes to change are specified as in \cfunctionname{XSyncCreateAlarm}.
-It returns \cconst{False} if dpy does not support the SYNC extension; 
-otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncSetPriority}
-\cargdecl{Display *}{dpy},
-\cargdecl{XID}{client\_resource\_id},
-\cargdecl{int}{priority}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncSetPriority} sets the priority of the client owning 
-client\_resource\_id to priority.  
-If client\_resource\_id is \cconst{None},
-it sets the caller's priority.  It returns \cconst{False} if dpy
-does not support the SYNC extension; otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-
-% start marker
-\cstartfunction{Status}{XSyncGetPriority}
-\cargdecl{Display *}{dpy},
-\cargdecl{XID}{client\_resource\_id},
-\cargdecl{int *}{return\_priority}
-\cendfunctiondecl
-% end marker
-
-\cfunctionname{XSyncGetPriority} sets *return\_priority to the priority
-of the client owning client\_resource\_id. 
-If client\_resource\_id is
-\cconst{None}, it sets *return\_priority to the caller's priority.
-It returns \cconst{False} if there was an error
-during communication with the server or if dpy does not
-support the SYNC extension; otherwise, it returns \cconst{True}.
-\cendfuncdescription
-
-\subsection{C Macros/Functions}
-
-The following procedures manipulate 64-bit values.  They are defined
-both as macros and as functions.  By default, the macro form is used.
-To use the function form, \#undef the macro name to uncover the
-function.
-
-
-% start marker
-\cstartmacro{void}{XSyncIntToValue}
-\cargdecl{XSyncValue}{*pv},
-\cargdecl{int}{i}
-\cendmacrodecl
-% end marker
-
-Converts i to an \ctypename{XSyncValue} and stores it in
-*pv.  Performs sign extension (*pv will have the
-same sign as i.)
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{void}{XSyncIntsToValue}
-\cargdecl{XSyncValue}{*pv},
-\cargdecl{unsigned int}{low},
-\cargdecl{int}{high}
-\cendmacrodecl
-% end marker
-
-Stores low in the low 32 bits of *pv and 
-high in the high 32 bits of *pv.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueGreaterThan}
-\cargdecl{XSyncValue}{a},
-\cargdecl{XSyncValue}{b}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if a is greater than b,
-else returns \cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueLessThan}
-\cargdecl{XSyncValue}{a},
-\cargdecl{XSyncValue}{b}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if a is less than b,
-else returns \cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueGreaterOrEqual}
-\cargdecl{XSyncValue}{a},
-\cargdecl{XSyncValue}{b}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if a is greater than or equal to b,
-else returns \cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueLessOrEqual}
-\cargdecl{XSyncValue}{a},
-\cargdecl{XSyncValue}{b}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if a is less than or equal to b.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueEqual}
-\cargdecl{XSyncValue}{a},
-\cargdecl{XSyncValue}{b}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if a is equal to b,
-else returns \cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueIsNegative}
-\cargdecl{XSyncValue}{v}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if v is negative, else returns
-\cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueIsZero}
-\cargdecl{XSyncValue}{v}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if v is zero,
-else returns \cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{Bool}{XSyncValueIsPositive}
-\cargdecl{XSyncValue}{v}
-\cendmacrodecl
-% end marker
-
-Returns \cconst{True} if v is positive, else returns
-\cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{unsigned int}{XSyncValueLow32}
-\cargdecl{XSyncValue}{v}
-\cendmacrodecl
-% end marker
-
-Returns the low 32 bits of v.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{int}{XSyncValueHigh32}
-\cargdecl{XSyncValue}{v}
-\cendmacrodecl
-% end marker
-
-Returns the high 32 bits of v.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{void}{XSyncValueAdd}
-\cargdecl{XSyncValue *}{presult},
-\cargdecl{XSyncValue}{a},
-\cargdecl{XSyncValue}{b},
-\cargdecl{Bool *}{poverflow}
-\cendmacrodecl
-% end marker
-
-Adds a to b and stores the result in *presult.
-If the result could not fit in 64 bits, *poverflow is set to
-\cconst{True}, else it is set to \cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{void}{XSyncValueSubtract}
-\cargdecl{XSyncValue *}{presult},
-\cargdecl{XSyncValue}{a},
-\cargdecl{XSyncValue}{b},
-\cargdecl{Bool *}{poverflow}
-\cendmacrodecl
-% end marker
-
-Subtracts b from a and stores the result in
-*presult.
-If the result could not fit in 64 bits, overflow is set to
-\cconst{True}, else it is set to \cconst{False}.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{void}{XSyncMaxValue}
-\cargdecl{XSyncValue *}{pv}
-\cendmacrodecl
-% end marker
-
-Sets *pv to the maximum value expressible in 64 bits.
-\cendmacrodescription
-
-
-% start marker
-\cstartmacro{void}{XSyncMinValue}
-\cargdecl{XSyncValue *}{pv}
-\cendmacrodecl
-% end marker
-
-Sets *pv to the minimum value expressible in 64 bits.
-\cendmacrodescription
-
-\subsection{Events}
-
-Let \cargname{event\_base} be the value \cargname{event\_base\_return}
-as defined in the function \cfunctionname{XSyncQueryExtension}.
-
-An \ctypename{XSyncCounterNotifyEvent}'s type field has the value
-\cargname{event\_base} + \cconst{XSyncCounterNotify}.  The fields of
-this structure are:
-
-\begin{tabular}{lll}
-int & type;	& /* event base + \cconst{XSyncCounterNotify} */ \\
-unsigned long & serial; & /* number of last request processed by server */ \\
-Bool & send\_event;& /* true if this came from a SendEvent request */ \\
-Display * & display; & /* Display the event was read from */\\
-XSyncCounter & counter;	& /* counter involved in await */\\
-XSyncValue & wait\_value; & /* value being waited for */\\
-XSyncValue & counter\_value; & /* counter value when this event was sent */\\
-Time & time; & /* milliseconds */\\
-int & count; & /* how many more events to come */\\
-Bool & destroyed; & /* True if counter was destroyed */\\
-\end{tabular}
-
-An \ctypename{XSyncAlarmNotifyEvent}'s type field has the value
-\cargname{event\_base} + \cconst{XSyncAlarmNotify}.  The fields of this
-structure are:
-
-\begin{tabular}{lll}
-int & type;&	/* event base + \cconst{XSyncAlarmNotify} */\\
-unsigned long & serial;&/* number of last request processed by server */\\
-Bool & send\_event;& /* true if this came from a SendEvent request */\\
-Display * & display;&	/* Display the event was read from */\\
-XSyncAlarm & alarm;&	/* alarm that triggered */\\
-XSyncValue & counter\_value;&/* value that triggered the alarm */\\
-XSyncValue & alarm\_value;&	/* test  value of trigger in alarm */\\
-Time & time;&	/* milliseconds */\\
-XSyncAlarmState & state;&	/* new state of alarm */\\
-\end{tabular}
-
-\subsection{Errors}
-
-Let \cargname{error\_base} be the value \cargname{error\_base\_return}
-as defined in the function \cfunctionname{XSyncQueryExtension}.
-
-An \ctypename{XSyncAlarmError}'s error\_code field has the value
-\cargname{error\_base} + \cconst{XSyncBadAlarm}.  The fields of
-this structure are:
-
-\begin{tabular}{lll}
-int & type;	\\
-Display * & display;& /* Display the event was read from */\\
-XSyncAlarm &  alarm;& /* resource id */\\
-unsigned long & serial;& /* serial number of failed request */\\
-unsigned char & error\_code;&/* error base + XSyncBadAlarm */\\
-unsigned char & request\_code;&/* Major op-code of failed request */\\
-unsigned char & minor\_code;&/* Minor op-code of failed request */\\
-\end{tabular}
-
-An \ctypename{XSyncCounterError}'s error\_code field has the value
-\cargname{error\_base} + \cconst{XSyncBadCounter}.  The fields of
-this structure are:
-
-\begin{tabular}{lll}
-int &type;\\
-Display * & display;&	/* Display the event was read from */\\
-XSyncCounter & counter;&	/* resource id */\\
-unsigned long & serial;&	/* serial number of failed request */\\
-unsigned char & error\_code;&/* error base + XSyncBadCounter */\\
-unsigned char & request\_code;&/* Major op-code of failed request */\\
-unsigned char & minor\_code;& /* Minor op-code of failed request */\\
-\end{tabular}
-
-\end{document}