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// Copyright 2015-2018 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pse
/*
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <stddef.h>
#include <unistd.h>
long pagetok(long size)
{
int pageshift, pagesize;
pagesize = getpagesize();
pageshift = 0;
while (pagesize > 1) {
pageshift++;
pagesize >>= 1;
}
return (size << pageshift);
}
int getusage(double *pcpu, unsigned int *rss, unsigned int *vss)
{
int mib[4], ret;
size_t len;
struct kinfo_proc kp;
len = 4;
sysctlnametomib("kern.proc.pid", mib, &len);
mib[3] = getpid();
len = sizeof(kp);
ret = sysctl(mib, 4, &kp, &len, NULL, 0);
if (ret != 0) {
return (errno);
}
*rss = pagetok(kp.ki_rssize);
*vss = kp.ki_size;
*pcpu = kp.ki_pctcpu;
return 0;
}
*/
import "C"
import (
"syscall"
)
// This is a placeholder for now.
func ProcUsage(pcpu *float64, rss, vss *int64) error {
var r, v C.uint
var c C.double
if ret := C.getusage(&c, &r, &v); ret != 0 {
return syscall.Errno(ret)
}
*pcpu = float64(c)
*rss = int64(r)
*vss = int64(v)
return nil
}
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