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GLWAITSYNC(3G)				  OpenGL Manual 			   GLWAITSYNC(3G)

NAME
       glWaitSync - instruct the GL server to block until the specified sync object becomes
       signaled

C SPECIFICATION
       void glWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout);

PARAMETERS
       sync
	   Specifies the sync object whose status to wait on.

       flags
	   A bitfield controlling the command flushing behavior.  flags may be zero.

       timeout
	   Specifies the timeout that the server should wait before continuing.  timeout must be
	   GL_TIMEOUT_IGNORED.

DESCRIPTION
       glWaitSync causes the GL server to block and wait until sync becomes signaled.  sync is
       the name of an existing sync object upon which to wait.	flags and timeout are currently
       not used and must be set to zero and the special value GL_TIMEOUT_IGNORED,
       respectively[1].  glWaitSync will always wait no longer than an implementation-dependent
       timeout. The duration of this timeout in nanoseconds may be queried by calling glGet()
       with the parameter GL_MAX_SERVER_WAIT_TIMEOUT. There is currently no way to determine
       whether glWaitSync unblocked because the timeout expired or because the sync object being
       waited on was signaled.

       If an error occurs, glWaitSync does not cause the GL server to block.

NOTES
       glWaitSync is available only if the GL version is 3.2 or higher.

ERRORS
       GL_INVALID_OPERATION is generated if sync is not the name of a sync object.

       GL_INVALID_VALUE is generated if flags is not zero.

       GL_INVALID_VALUE is generated if timeout is not GL_TIMEOUT_IGNORED.

SEE ALSO
       glFenceSync(), glClientWaitSync()

COPYRIGHT
       Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms
       and conditions set forth in the Open Publication License, v 1.0, 8 June 1999.
       http://opencontent.org/openpub/.

AUTHORS
       opengl.org

NOTES
	1. flags and timeout are placeholders for anticipated future extensions of sync object
	   capabilities. They must have these reserved values in order that existing code calling
	   glWaitSync operate properly in the presence of such extensions.

opengl.org				    06/10/2014				   GLWAITSYNC(3G)
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