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https://github.com/clearlinux/graphene.git
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Vijay Dhanraj
ec4422d415
This commit also fixes `pseudo_name_ops::list_name()` function pointer type: `size_t len` argument instead of `int len`. It also adds a regression test to exercise the newly supported /sys pseudo filesystem.
28 lines
1.1 KiB
C
28 lines
1.1 KiB
C
/* SPDX-License-Identifier: LGPL-3.0-or-later */
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/* Copyright (C) 2021 Intel Corporation
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* Vijay Dhanraj <vijay.dhanraj@intel.com>
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*/
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#ifndef TOPO_INFO_H_
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#define TOPO_INFO_H_
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#include "pal.h"
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/* Opens a pseudo-file describing HW resources such as online CPUs and counts the number of
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* HW resources present in the file (if count == true) or simply reads the integer stored in the
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* file (if count == false). For example on a single-core machine, calling this function on
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* `/sys/devices/system/cpu/online` with count == true will return 1 and 0 with count == false.
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* Returns UNIX error code on failure.
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* N.B: Understands complex formats like "1,3-5,6" when called with count == true.
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*/
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int get_hw_resource(const char* filename, bool count);
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/* Reads up to count bytes from the file into the buf passed.
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* Returns 0 or number of bytes read on success and UNIX error code on failure.
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*/
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int read_file_buffer(const char* filename, char* buf, size_t count);
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/* Fills topo_info with CPU and NUMA topology from the host */
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int get_topology_info(PAL_TOPO_INFO* topo_info);
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#endif // TOPO_INFO_H_
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