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.TH "hwlocality_gl" 3 "Version 2.12.0" "Hardware Locality (hwloc)" \" -*- nroff -*-
.ad l
.nh
.SH NAME
hwlocality_gl \- Interoperability with OpenGL displays
.SH SYNOPSIS
.br
.PP
.SS "Functions"
.in +1c
.ti -1c
.RI "\fBhwloc_obj_t\fP \fBhwloc_gl_get_display_osdev_by_port_device\fP (\fBhwloc_topology_t\fP topology, unsigned port, unsigned device)"
.br
.ti -1c
.RI "\fBhwloc_obj_t\fP \fBhwloc_gl_get_display_osdev_by_name\fP (\fBhwloc_topology_t\fP topology, const char *name)"
.br
.ti -1c
.RI "int \fBhwloc_gl_get_display_by_osdev\fP (\fBhwloc_topology_t\fP topology, \fBhwloc_obj_t\fP osdev, unsigned *port, unsigned *device)"
.br
.in -1c
.SH "Detailed Description"
.PP
This interface offers ways to retrieve topology information about OpenGL displays\&.
.PP
Only the NVIDIA display locality information is currently available, using the NV-CONTROL X11 extension and the NVCtrl library\&.
.SH "Function Documentation"
.PP
.SS "int hwloc_gl_get_display_by_osdev (\fBhwloc_topology_t\fP topology, \fBhwloc_obj_t\fP osdev, unsigned * port, unsigned * device)\fC [inline]\fP"
.PP
Get the OpenGL display port and device corresponding to the given hwloc OS object\&. Retrieves the OpenGL display port (server) in \fCport\fP and device (screen) in \fCscreen\fP that correspond to the given hwloc OS device object\&.
.PP
\fBReturns\fP
.RS 4
0 on success\&.
.PP
-1 if none could be found\&.
.RE
.PP
The topology \fCtopology\fP does not necessarily have to match the current machine\&. For instance the topology may be an XML import of a remote host\&. I/O devices detection and the GL component must be enabled in the topology\&.
.SS "\fBhwloc_obj_t\fP hwloc_gl_get_display_osdev_by_name (\fBhwloc_topology_t\fP topology, const char * name)\fC [inline]\fP"
.PP
Get the hwloc OS device object corresponding to the OpenGL display given by name\&.
.PP
\fBReturns\fP
.RS 4
The hwloc OS device object describing the OpenGL display whose name is \fCname\fP, built as ':port\&.device' such as ':0\&.0' \&.
.PP
\fCNULL\fP if none could be found\&.
.RE
.PP
The topology \fCtopology\fP does not necessarily have to match the current machine\&. For instance the topology may be an XML import of a remote host\&. I/O devices detection and the GL component must be enabled in the topology\&.
.PP
\fBNote\fP
.RS 4
The corresponding PCI device object can be obtained by looking at the OS device parent object (unless PCI devices are filtered out)\&.
.RE
.PP
.SS "\fBhwloc_obj_t\fP hwloc_gl_get_display_osdev_by_port_device (\fBhwloc_topology_t\fP topology, unsigned port, unsigned device)\fC [inline]\fP"
.PP
Get the hwloc OS device object corresponding to the OpenGL display given by port and device index\&.
.PP
\fBReturns\fP
.RS 4
The hwloc OS device object describing the OpenGL display whose port (server) is \fCport\fP and device (screen) is \fCdevice\fP\&.
.PP
\fCNULL\fP if none could be found\&.
.RE
.PP
The topology \fCtopology\fP does not necessarily have to match the current machine\&. For instance the topology may be an XML import of a remote host\&. I/O devices detection and the GL component must be enabled in the topology\&.
.PP
\fBNote\fP
.RS 4
The corresponding PCI device object can be obtained by looking at the OS device parent object (unless PCI devices are filtered out)\&.
.RE
.PP
.SH "Author"
.PP
Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code\&.
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