GENERIC_PIPE_BUF_MAP(9) pipes API GENERIC_PIPE_BUF_MAP(9)NAME
generic_pipe_buf_map - virtually map a pipe buffer
SYNOPSIS
void * generic_pipe_buf_map(struct pipe_inode_info * pipe, struct pipe_buffer * buf, int atomic);
ARGUMENTS
pipe
the pipe that the buffer belongs to
buf
the buffer that should be mapped
atomic
whether to use an atomic map
DESCRIPTION
This function returns a kernel virtual address mapping for the pipe_buffer passed in buf. If atomic is set, an atomic map is provided and
the caller has to be careful not to fault before calling the unmap function.
Note that this function calls kmap_atomic if atomic != 0.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 GENERIC_PIPE_BUF_MAP(9)
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GLGETACTIVEATOMICCOU(3G) [FIXME: manual] GLGETACTIVEATOMICCOU(3G)NAME
glGetActiveAtomicCounterBufferiv - retrieve information about the set of active atomic counter buffers for a program
C SPECIFICATION
void glGetActiveAtomicCounterBufferiv(Gluint program, GLuint bufferIndex, GLenum pname, GLint *params);
PARAMETERS
program
The name of a program object from which to retrieve information.
bufferIndex
Specifies index of an active atomic counter buffer.
pname
Specifies which parameter of the atomic counter buffer to retrieve.
params
Specifies the address of a variable into which to write the retrieved information.
DESCRIPTION
glGetActiveAtomicCounterBufferiv retrieves information about the set of active atomic counter buffers for a program object. program is the
name of a program object for which the command glLinkProgram() has been issued in the past. It is not necessary for program to have been
linked successfully. The link may have failed because the number of active atomic counters exceeded the limits.
bufferIndex specifies the index of an active atomic counter buffer and must be in the range zero to the value of
GL_ACTIVE_ATOMIC_COUNTER_BUFFERS minus one. The value of GL_ACTIVE_ATOMIC_COUNTER_BUFFERS for program indicates the number of active atomic
counter buffer and can be queried with glGetProgram().
If no error occurs, the parameter(s) specified by pname are returned in params. If an error is generated, the contents of params are not
modified.
If pname is GL_ATOMIC_COUNTER_BUFFER_BINDING, then the index of the counter buffer binding point associated with the active atomic counter
buffer bufferIndex for program is returned.
If pname is GL_ATOMIC_COUNTER_BUFFER_DATA_SIZE, then the implementation-dependent minimum total buffer object size, in baseic machine
units, required to hold all active atomic counters in the atomic counter binding point identified by bufferIndex is returned.
If pname is GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS, then the number of active atomic counters for the atomic counter buffer
identified by bufferIndex is returned.
If pname is GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTER_INDICES, then a list of the active atomic counter indices for the atomic counter
buffer identified by bufferIndex is returned. The number of elements that will be written into params is the value of
GL_ATOMIC_COUNTER_BUFFER_ACTIVE_ATOMIC_COUNTERS for bufferIndex.
If pname is GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_VERTEX_SHADER, GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_CONTROL_SHADER,
GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_TESS_EVALUATION_SHADER, GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_GEOMETRY_SHADER, or
GL_ATOMIC_COUNTER_BUFFER_REFERENCED_BY_FRAGMENT_SHADER, then a boolean value indicating whether the atomic counter buffer identified by
bufferIndex is referenced by the vertex, tessellation control, tessellation evaluation, geometry or fragment processing stages of program,
respectively, is returned.
NOTES
glGetActiveAtomicCounterBufferiv is available only if the GL version is 4.2 or higher.
ERRORS
GL_INVALID_VALUE is generated if program is not the name of a program object for which glLinkProgram() has been called in the past.
GL_INVALID_VALUE is generated if bufferIndex is greater than or equal to the value of GL_ACTIVE_ATOMIC_COUNTER_BUFFERS for program.
GL_INVALID_ENUM is generated if pname is not one of the accepted tokens.
SEE ALSO
glGetProgram(), glGetActiveSubroutineUniform(), glGetActiveSubroutineUniformName(), glGetUniformLocation()
COPYRIGHT
Copyright (C) 2011 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/.
[FIXME: source] 05/30/2012 GLGETACTIVEATOMICCOU(3G)