gl.h
/*
* SPDX-License-Identifier: BSD-3-Clause
* Copyright © 2012 Blue Brain Project, EPFL. All rights reserved.
* Copyright © 2012-2023 Inria. All rights reserved.
* See COPYING in top-level directory.
*/
#ifndef HWLOC_GL_H
#define HWLOC_GL_H
#include "hwloc.h"
#include <stdio.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
#endif
static __hwloc_inline hwloc_obj_t
hwloc_gl_get_display_osdev_by_port_device(hwloc_topology_t topology,
unsigned port, unsigned device)
{
unsigned x = (unsigned) -1, y = (unsigned) -1;
hwloc_obj_t osdev = NULL;
while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
if (HWLOC_OBJ_OSDEV_GPU == osdev->attr->osdev.type
&& osdev->name
&& sscanf(osdev->name, ":%u.%u", &x, &y) == 2
&& port == x && device == y)
return osdev;
}
errno = EINVAL;
return NULL;
}
static __hwloc_inline hwloc_obj_t
hwloc_gl_get_display_osdev_by_name(hwloc_topology_t topology,
const char *name)
{
hwloc_obj_t osdev = NULL;
while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
if (HWLOC_OBJ_OSDEV_GPU == osdev->attr->osdev.type
&& osdev->name
&& !strcmp(name, osdev->name))
return osdev;
}
errno = EINVAL;
return NULL;
}
static __hwloc_inline int
hwloc_gl_get_display_by_osdev(hwloc_topology_t topology __hwloc_attribute_unused,
hwloc_obj_t osdev,
unsigned *port, unsigned *device)
{
unsigned x = -1, y = -1;
if (HWLOC_OBJ_OSDEV_GPU == osdev->attr->osdev.type
&& sscanf(osdev->name, ":%u.%u", &x, &y) == 2) {
*port = x;
*device = y;
return 0;
}
errno = EINVAL;
return -1;
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* HWLOC_GL_H */
HWLOC_OBJ_OSDEV_GPU
@ HWLOC_OBJ_OSDEV_GPU
Operating system GPU device. For instance ":0.0" for a GL display, "card0" for a Linux DRM device.
Definition hwloc.h:380
hwloc_obj_t
struct hwloc_obj * hwloc_obj_t
Convenience typedef; a pointer to a struct hwloc_obj.
Definition hwloc.h:637
hwloc_topology_t
struct hwloc_topology * hwloc_topology_t
Topology context.
Definition hwloc.h:748
hwloc_get_next_osdev
hwloc_obj_t hwloc_get_next_osdev(hwloc_topology_t topology, hwloc_obj_t prev)
Get the next OS device in the system.
Definition helper.h:1291
hwloc_gl_get_display_osdev_by_port_device
hwloc_obj_t hwloc_gl_get_display_osdev_by_port_device(hwloc_topology_t topology, unsigned port, unsigned device)
Get the hwloc OS device object corresponding to the OpenGL display given by port and device index.
Definition gl.h:62
hwloc_gl_get_display_by_osdev
int hwloc_gl_get_display_by_osdev(hwloc_topology_t topology, hwloc_obj_t osdev, unsigned *port, unsigned *device)
Get the OpenGL display port and device corresponding to the given hwloc OS object.
Definition gl.h:129
hwloc_gl_get_display_osdev_by_name
hwloc_obj_t hwloc_gl_get_display_osdev_by_name(hwloc_topology_t topology, const char *name)
Get the hwloc OS device object corresponding to the OpenGL display given by name.
Definition gl.h:97
hwloc_obj::name
char * name
Object-specific name if any. Mostly used for identifying OS devices and Misc objects where a name str...
Definition hwloc.h:449
hwloc_obj::attr
union hwloc_obj_attr_u * attr
Object type-specific Attributes, may be NULL if no attribute value was found.
Definition hwloc.h:456
hwloc_obj_attr_u::osdev
struct hwloc_obj_attr_u::hwloc_osdev_attr_s osdev
hwloc_obj_attr_u::hwloc_osdev_attr_s::type
hwloc_obj_osdev_type_t type
Definition hwloc.h:722