[common] cpuinfo: implement for linux by parsing /proc/cpuinfo

This commit is contained in:
Quantum 2021-08-30 20:02:24 -04:00 committed by Geoffrey McRae
parent 815aac28fb
commit a6112feddb
2 changed files with 77 additions and 0 deletions

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@ -16,6 +16,7 @@ add_library(lg_common_platform_code STATIC
time.c time.c
paths.c paths.c
open.c open.c
cpuinfo.c
) )
if(ENABLE_BACKTRACE) if(ENABLE_BACKTRACE)

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@ -0,0 +1,76 @@
/**
* Looking Glass
* Copyright © 2017-2021 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "common/cpuinfo.h"
#include "common/debug.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
bool lgCPUInfo(char * model, size_t modelSize, int * procs, int * cores)
{
FILE * cpuinfo = fopen("/proc/cpuinfo", "r");
if (!cpuinfo)
{
DEBUG_ERROR("Failed to open /proc/cpuinfo: %s", strerror(errno));
return false;
}
if (procs)
*procs = 0;
if (cores)
*cores = 0;
char buffer[1024];
while (fgets(buffer, sizeof(buffer), cpuinfo))
{
if (procs && strncmp(buffer, "processor", 9) == 0)
++*procs;
else if (model && strncmp(buffer, "model name", 10) == 0)
{
const char * name = strstr(buffer, ": ");
if (name)
name += 2;
snprintf(model, modelSize, "%s", name ? name : "Unknown");
model = NULL;
}
else if (cores && strncmp(buffer, "cpu cores", 9) == 0)
{
const char * num = strstr(buffer, ": ");
if (num)
{
*cores = atoi(num + 2);
cores = NULL;
}
}
// If a line is too long, skip it.
while (buffer[strlen(buffer) - 1] != '\n')
if (!fgets(buffer, sizeof(buffer), cpuinfo))
goto done;
}
done:
fclose(cpuinfo);
return true;
}