glWaitSync man page on Oracle
[printable version]
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 © 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 04/29/2014 GLWAITSYNC(3G)
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