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https://github.com/FeralInteractive/gamemode.git
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81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*
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Copyright (c) 2017, Feral Interactive
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Feral Interactive nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "governors.h"
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#include "logging.h"
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#include <linux/limits.h>
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#include <stdio.h>
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#include <unistd.h>
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static char initial[32];
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// Store the initial governor state to be referenced later
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void update_initial_gov_state()
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{
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static char *command = "cpugovctl get";
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FILE *f = popen(command, "r");
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if (!f) {
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FATAL_ERRORNO("Failed to launch \"%s\" script", command);
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}
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if (!fgets(initial, sizeof(initial) - 1, f)) {
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FATAL_ERROR("Failed to get output from \"%s\"", command);
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}
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pclose(f);
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strtok(initial, "\n");
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}
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// Sets all governors to a value, if NULL argument provided, will reset them back
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void set_governors(const char *value)
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{
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const char *newval = value ? value : initial;
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LOG_MSG("Setting governors to %s\n", newval ? newval : "initial values");
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char command[PATH_MAX] = {};
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snprintf(command, sizeof(command), "cpugovctl set %s", newval);
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FILE *f = popen(command, "r");
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if (!f) {
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FATAL_ERRORNO("Failed to launch %s script", command);
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}
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pclose(f);
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}
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// Return the initial governor
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const char *get_initial_governor()
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{
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return initial;
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}
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