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Full Discussion: Problem on capturing system Shutdown
Top Forums Programming Problem on capturing system Shutdown Post 302847709 by hakermania on Tuesday 27th of August 2013 03:10:38 PM
Old 08-27-2013
Quote:
Originally Posted by Corona688
I think you just answered your own question. You can give it more than a chance -- you can actually do so. Async-safe calls include open(), close(), read(), and write() among many other things. All you need.
So you claim that if I make a sync-safe function using the above sync-safe functions, then the handler will be executed? And if this is true then how does the system determine:

a) Where in the memory the handler sits for each application
b) If the handler is sync-safe or sync-unsafe

Also, this is still a question:

What different does the system do instead of sending SIGTERM, waiting for the process to exit, and, after timing out, sending SIGKILL? Because it does something different, it not only sends SIGTERM, because if I send it, it just works.
 

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LEARN ABOUT CENTOS

glclientwaitsync

GLCLIENTWAITSYNC(3G)						   OpenGL Manual					      GLCLIENTWAITSYNC(3G)

NAME

       glClientWaitSync - block and wait for a sync object to become signaled

C SPECIFICATION

       GLenum glClientWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout);

PARAMETERS

       sync
	   The sync object whose status to wait on.

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

       timeout
	   The timeout, specified in nanoseconds, for which the implementation should wait for sync to become signaled.

DESCRIPTION

       glClientWaitSync causes the client to block and wait for the sync object specified by sync to become signaled. If sync is signaled when
       glClientWaitSync is called, glClientWaitSync returns immediately, otherwise it will block and wait for up to timeout nanoseconds for sync
       to become signaled.

       The return value is one of four status values:

       o   GL_ALREADY_SIGNALED indicates that sync was signaled at the time that glClientWaitSync was called.

       o   GL_TIMEOUT_EXPIRED indicates that at least timeout nanoseconds passed and sync did not become signaled.

       o   GL_CONDITION_SATISFIED indicates that sync was signaled before the timeout expired.

       o   GL_WAIT_FAILED indicates that an error occurred. Additionally, an OpenGL error will be generated.

NOTES

       glClientWaitSync is available only if the GL version is 3.2 or greater.

ERRORS

       GL_INVALID_VALUE is generated if sync is not the name of an existing sync object.

       GL_INVALID_VALUE is generated if flags contains any unsupported flag.

SEE ALSO

       glFenceSync(), glIsSync()glWaitSync()

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

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