Use internal hwloc for MSVC.

src/3rdparty/hwloc/include/hwloc/nvml.h

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+/*
+ * Copyright © 2012-2016 Inria.  All rights reserved.
+ * See COPYING in top-level directory.
+ */
+
+/** \file
+ * \brief Macros to help interaction between hwloc and the NVIDIA Management Library.
+ *
+ * Applications that use both hwloc and the NVIDIA Management Library may want to
+ * include this file so as to get topology information for NVML devices.
+ */
+
+#ifndef HWLOC_NVML_H
+#define HWLOC_NVML_H
+
+#include <hwloc.h>
+#include <hwloc/autogen/config.h>
+#include <hwloc/helper.h>
+#ifdef HWLOC_LINUX_SYS
+#include <hwloc/linux.h>
+#endif
+
+#include <nvml.h>
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/** \defgroup hwlocality_nvml Interoperability with the NVIDIA Management Library
+ *
+ * This interface offers ways to retrieve topology information about
+ * devices managed by the NVIDIA Management Library (NVML).
+ *
+ * @{
+ */
+
+/** \brief Get the CPU set of logical processors that are physically
+ * close to NVML device \p device.
+ *
+ * Return the CPU set describing the locality of the NVML device \p device.
+ *
+ * Topology \p topology and device \p device must match the local machine.
+ * I/O devices detection and the NVML component are not needed in the topology.
+ *
+ * The function only returns the locality of the device.
+ * If more information about the device is needed, OS objects should
+ * be used instead, see hwloc_nvml_get_device_osdev()
+ * and hwloc_nvml_get_device_osdev_by_index().
+ *
+ * This function is currently only implemented in a meaningful way for
+ * Linux; other systems will simply get a full cpuset.
+ */
+static __hwloc_inline int
+hwloc_nvml_get_device_cpuset(hwloc_topology_t topology __hwloc_attribute_unused,
+			     nvmlDevice_t device, hwloc_cpuset_t set)
+{
+#ifdef HWLOC_LINUX_SYS
+  /* If we're on Linux, use the sysfs mechanism to get the local cpus */
+#define HWLOC_NVML_DEVICE_SYSFS_PATH_MAX 128
+  char path[HWLOC_NVML_DEVICE_SYSFS_PATH_MAX];
+  nvmlReturn_t nvres;
+  nvmlPciInfo_t pci;
+
+  if (!hwloc_topology_is_thissystem(topology)) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  nvres = nvmlDeviceGetPciInfo(device, &pci);
+  if (NVML_SUCCESS != nvres) {
+    errno = EINVAL;
+    return -1;
+  }
+
+  sprintf(path, "/sys/bus/pci/devices/%04x:%02x:%02x.0/local_cpus", pci.domain, pci.bus, pci.device);
+  if (hwloc_linux_read_path_as_cpumask(path, set) < 0
+      || hwloc_bitmap_iszero(set))
+    hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
+#else
+  /* Non-Linux systems simply get a full cpuset */
+  hwloc_bitmap_copy(set, hwloc_topology_get_complete_cpuset(topology));
+#endif
+  return 0;
+}
+
+/** \brief Get the hwloc OS device object corresponding to the
+ * NVML device whose index is \p idx.
+ *
+ * Return the OS device object describing the NVML device whose
+ * index is \p idx. Returns NULL if there is none.
+ *
+ * The topology \p topology 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 NVML component must be enabled in the topology.
+ *
+ * \note The corresponding PCI device object can be obtained by looking
+ * at the OS device parent object (unless PCI devices are filtered out).
+ */
+static __hwloc_inline hwloc_obj_t
+hwloc_nvml_get_device_osdev_by_index(hwloc_topology_t topology, unsigned idx)
+{
+	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
+		    && !strncmp("nvml", osdev->name, 4)
+		    && atoi(osdev->name + 4) == (int) idx)
+                        return osdev;
+        }
+        return NULL;
+}
+
+/** \brief Get the hwloc OS device object corresponding to NVML device \p device.
+ *
+ * Return the hwloc OS device object that describes the given
+ * NVML device \p device. Return NULL if there is none.
+ *
+ * Topology \p topology and device \p device must match the local machine.
+ * I/O devices detection and the NVML component must be enabled in the topology.
+ * If not, the locality of the object may still be found using
+ * hwloc_nvml_get_device_cpuset().
+ *
+ * \note The corresponding hwloc PCI device may be found by looking
+ * at the result parent pointer (unless PCI devices are filtered out).
+ */
+static __hwloc_inline hwloc_obj_t
+hwloc_nvml_get_device_osdev(hwloc_topology_t topology, nvmlDevice_t device)
+{
+	hwloc_obj_t osdev;
+	nvmlReturn_t nvres;
+	nvmlPciInfo_t pci;
+	char uuid[64];
+
+	if (!hwloc_topology_is_thissystem(topology)) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	nvres = nvmlDeviceGetPciInfo(device, &pci);
+	if (NVML_SUCCESS != nvres)
+		return NULL;
+
+	nvres = nvmlDeviceGetUUID(device, uuid, sizeof(uuid));
+	if (NVML_SUCCESS != nvres)
+		uuid[0] = '\0';
+
+	osdev = NULL;
+	while ((osdev = hwloc_get_next_osdev(topology, osdev)) != NULL) {
+		hwloc_obj_t pcidev = osdev->parent;
+		const char *info;
+
+		if (strncmp(osdev->name, "nvml", 4))
+			continue;
+
+		if (pcidev
+		    && pcidev->type == HWLOC_OBJ_PCI_DEVICE
+		    && pcidev->attr->pcidev.domain == pci.domain
+		    && pcidev->attr->pcidev.bus == pci.bus
+		    && pcidev->attr->pcidev.dev == pci.device
+		    && pcidev->attr->pcidev.func == 0)
+			return osdev;
+
+		info = hwloc_obj_get_info_by_name(osdev, "NVIDIAUUID");
+		if (info && !strcmp(info, uuid))
+			return osdev;
+	}
+
+	return NULL;
+}
+
+/** @} */
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+
+#endif /* HWLOC_NVML_H */