mirror of
https://github.com/deneraraujo/OpenVPNAdapter.git
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f65d76170b
git-subtree-dir: OpenVPN Adapter/Vendors/openvpn git-subtree-split: da99df69492256d7a18bbea303ae98457782a4bf
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2017 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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#include <stdio.h>
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#include <unistd.h>
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#include <jni.h>
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#ifdef SWIGEXPORT
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#define EXPORT SWIGEXPORT
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#else
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#define EXPORT
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#endif
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#ifndef OPENVPN_PACKAGE_ID
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#error OPENVPN_PACKAGE_ID must be defined
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#endif
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#define MAKE_SYM2(pkg_id, suffix) Java_ ## pkg_id ## _CPUUsage_ ## suffix
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#define MAKE_SYM(pkg_id, suffix) MAKE_SYM2(pkg_id, suffix)
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#define CPU_USAGE MAKE_SYM(OPENVPN_PACKAGE_ID, cpu_1usage)
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extern "C" {
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jdouble CPU_USAGE(JNIEnv* env, jclass);
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};
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EXPORT jdouble CPU_USAGE(JNIEnv* env, jclass)
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{
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char fnbuf[64];
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const pid_t pid = getpid();
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double ret = 0.0;
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snprintf(fnbuf, sizeof(fnbuf), "/proc/%u/stat", (unsigned int)pid);
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FILE *fp = fopen(fnbuf, "r");
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if (fp)
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{
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double user = 0.0;
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double system = 0.0;
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if (fscanf(fp, "%*s %*s %*s %*s %*s %*s %*s %*s %*s %*s %*s %*s %*s %lf %lf", &user, &system) == 2)
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ret = (user + system) / sysconf(_SC_CLK_TCK);
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fclose(fp);
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}
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return ret;
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}
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