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glfencesync(3g) [debian man page]

GLFENCESYNC(3G) 						  [FIXME: manual]						   GLFENCESYNC(3G)

NAME
glFenceSync - create a new sync object and insert it into the GL command stream C SPECIFICATION
GLsync glFenceSync(GLenum condition, GLbitfield flags); PARAMETERS
condition Specifies the condition that must be met to set the sync object's state to signaled. condition must be GL_SYNC_GPU_COMMANDS_COMPLETE. flags Specifies a bitwise combination of flags controlling the behavior of the sync object. No flags are presently defined for this operation and flags must be zero.[1] DESCRIPTION
glFenceSync creates a new fence sync object, inserts a fence command into the GL command stream and associates it with that sync object, and returns a non-zero name corresponding to the sync object. When the specified condition of the sync object is satisfied by the fence command, the sync object is signaled by the GL, causing any glWaitSync(), glClientWaitSync() commands blocking in sync to unblock. No other state is affected by glFenceSync or by the execution of the associated fence command. condition must be GL_SYNC_GPU_COMMANDS_COMPLETE. This condition is satisfied by completion of the fence command corresponding to the sync object and all preceding commands in the same command stream. The sync object will not be signaled until all effects from these commands on GL client and server state and the framebuffer are fully realized. Note that completion of the fence command occurs once the state of the corresponding sync object has been changed, but commands waiting on that sync object may not be unblocked until after the fence command completes. NOTES
glFenceSync is only supported if the GL version is 3.2 or greater, or if the ARB_sync extension is supported. .SH "ERRORS" GL_INVALID_ENUM is generated if condition is not GL_SYNC_GPU_COMMANDS_COMPLETE. GL_INVALID_VALUE is generated if flags is not zero. Additionally, if glFenceSync fails, it will return zero. SEE ALSO
glDeleteSync(), glGetSync(), glWaitSync(), 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/. NOTES
1. flags is a placeholder for anticipated future extensions of fence sync object capabilities. [FIXME: source] 05/30/2012 GLFENCESYNC(3G)

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GLWAITSYNC(3G)							    OpenGL 3.3							    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/. 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 3.3 03/08/2011 GLWAITSYNC(3G)
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