block_invalidatepage(9) [centos man page]

BLOCK_INVALIDATEPAGE(9) 					   The Linux VFS					   BLOCK_INVALIDATEPAGE(9)

NAME

       block_invalidatepage - invalidate part or all of a buffer-backed page

SYNOPSIS

       void block_invalidatepage(struct page * page, unsigned long offset);

ARGUMENTS

       page
	   the page which is affected

       offset
	   the index of the truncation point

DESCRIPTION

       block_invalidatepage is called when all or part of the page has become invalidated by a truncate operation.

       block_invalidatepage does not have to release all buffers, but it must ensure that no dirty buffer is left outside offset and that no I/O
       is underway against any of the blocks which are outside the truncation point. Because the caller is about to free (and possibly reuse)
       those blocks on-disk.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						   BLOCK_INVALIDATEPAGE(9)

GLINVALIDATEBUFFERSU(3G)					   OpenGL Manual					  GLINVALIDATEBUFFERSU(3G)

NAME

       glInvalidateBufferSubData - invalidate a region of a buffer object's data store

C SPECIFICATION

       void glInvalidateBufferSubData(GLuint buffer, GLintptr offset, GLsizeiptr length);

PARAMETERS

       buffer
	   The name of a buffer object, a subrange of whose data store to invalidate.

       offset
	   The offset within the buffer's data store of the start of the range to be invalidated.

       length
	   The length of the range within the buffer's data store to be invalidated.

DESCRIPTION

       glInvalidateBufferSubData invalidates all or part of the content of the data store of a buffer object. After invalidation, the content of
       the specified range of the buffer's data store becomes undefined. The start of the range is given by offset and its size is given by
       length, both measured in basic machine units.

ERRORS

       GL_INVALID_VALUE is generated if offset or length is negative, or if offset + length is greater than the value of GL_BUFFER_SIZE for
       buffer.

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

       GL_INVALID_OPERATION is generated if any part of buffer is currently mapped.

ASSOCIATED GETS

       glGetBufferParameter() with argument GL_BUFFER_SIZE

SEE ALSO

       glInvalidateTexSubImage(),, glInvalidateTexImage(), glInvalidateBufferData(), glInvalidateFramebuffer(), glInvalidateSubFramebuffer().

COPYRIGHT

       Copyright (C) 2012 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						  GLINVALIDATEBUFFERSU(3G)