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/* resource.cc: getrusage () and friends.
Copyright 1996, 1997, 1998, 2000, 2001, 2002 Red Hat, Inc.
Written by Steve Chamberlain (sac@cygnus.com), Doug Evans (dje@cygnus.com),
Geoffrey Noer (noer@cygnus.com) of Cygnus Support.
Rewritten by Sergey S. Okhapkin (sos@prospect.com.ru)
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <unistd.h>
#include <limits.h>
#include "cygerrno.h"
#include "pinfo.h"
#include "psapi.h"
/* add timeval values */
static void
add_timeval (struct timeval *tv1, struct timeval *tv2)
{
tv1->tv_sec += tv2->tv_sec;
tv1->tv_usec += tv2->tv_usec;
if (tv1->tv_usec >= 1000000)
{
tv1->tv_usec -= 1000000;
tv1->tv_sec++;
}
}
/* add rusage values of r2 to r1 */
void __stdcall
add_rusage (struct rusage *r1, struct rusage *r2)
{
add_timeval (&r1->ru_utime, &r2->ru_utime);
add_timeval (&r1->ru_stime, &r2->ru_stime);
r1->ru_maxrss += r2->ru_maxrss;
r1->ru_ixrss += r2->ru_ixrss;
r1->ru_idrss += r2->ru_idrss;
r1->ru_isrss += r2->ru_isrss;
r1->ru_minflt += r2->ru_minflt;
r1->ru_majflt += r2->ru_majflt;
r1->ru_nswap += r2->ru_nswap;
r1->ru_inblock += r2->ru_inblock;
r1->ru_oublock += r2->ru_oublock;
r1->ru_msgsnd += r2->ru_msgsnd;
r1->ru_msgrcv += r2->ru_msgrcv;
r1->ru_nsignals += r2->ru_nsignals;
r1->ru_nvcsw += r2->ru_nvcsw;
r1->ru_nivcsw += r2->ru_nivcsw;
}
/* FIXME: what about other fields? */
void __stdcall
fill_rusage (struct rusage *r, HANDLE h)
{
FILETIME creation_time = {0,0};
FILETIME exit_time = {0,0};
FILETIME kernel_time = {0,0};
FILETIME user_time = {0,0};
struct timeval tv;
memset (r, 0, sizeof (*r));
GetProcessTimes (h, &creation_time, &exit_time, &kernel_time, &user_time);
totimeval (&tv, &kernel_time, 0, 0);
add_timeval (&r->ru_stime, &tv);
totimeval (&tv, &user_time, 0, 0);
add_timeval (&r->ru_utime, &tv);
PROCESS_MEMORY_COUNTERS pmc;
memset (&pmc, 0, sizeof (pmc));
if (GetProcessMemoryInfo (h, &pmc, sizeof (pmc)))
{
r->ru_maxrss += (long) (pmc.WorkingSetSize /1024);
r->ru_majflt += pmc.PageFaultCount;
}
}
extern "C" int
getrusage (int intwho, struct rusage *rusage_in)
{
int res = 0;
struct rusage r;
if (intwho == RUSAGE_SELF)
{
memset (&r, 0, sizeof (r));
fill_rusage (&r, hMainProc);
*rusage_in = r;
}
else if (intwho == RUSAGE_CHILDREN)
*rusage_in = myself->rusage_children;
else
{
set_errno (EINVAL);
res = -1;
}
syscall_printf ("%d = getrusage (%d, %p)", res, intwho, rusage_in);
return res;
}
unsigned long rlim_core = RLIM_INFINITY;
extern "C" int
getrlimit (int resource, struct rlimit *rlp)
{
MEMORY_BASIC_INFORMATION m;
if (check_null_invalid_struct_errno (rlp))
return -1;
rlp->rlim_cur = RLIM_INFINITY;
rlp->rlim_max = RLIM_INFINITY;
switch (resource)
{
case RLIMIT_CPU:
case RLIMIT_FSIZE:
case RLIMIT_DATA:
break;
case RLIMIT_STACK:
if (!VirtualQuery ((LPCVOID) &m, &m, sizeof m))
debug_printf ("couldn't get stack info, returning def.values. %E");
else
{
rlp->rlim_cur = (DWORD) &m - (DWORD) m.AllocationBase;
rlp->rlim_max = (DWORD) m.BaseAddress + m.RegionSize
- (DWORD) m.AllocationBase;
}
break;
case RLIMIT_NOFILE:
rlp->rlim_cur = getdtablesize ();
if (rlp->rlim_cur < OPEN_MAX)
rlp->rlim_cur = OPEN_MAX;
break;
case RLIMIT_CORE:
rlp->rlim_cur = rlim_core;
break;
case RLIMIT_AS:
rlp->rlim_cur = 0x80000000UL;
rlp->rlim_max = 0x80000000UL;
break;
default:
set_errno (EINVAL);
return -1;
}
return 0;
}
extern "C" int
setrlimit (int resource, const struct rlimit *rlp)
{
if (__check_invalid_read_ptr_errno (rlp, sizeof (*rlp)))
return -1;
struct rlimit oldlimits;
// Check if the request is to actually change the resource settings.
// If it does not result in a change, take no action and do not
// fail.
if (getrlimit (resource, &oldlimits) < 0)
return -1;
if (oldlimits.rlim_cur == rlp->rlim_cur &&
oldlimits.rlim_max == rlp->rlim_max)
// No change in resource requirements, succeed immediately
return 0;
switch (resource)
{
case RLIMIT_CORE:
rlim_core = rlp->rlim_cur;
break;
case RLIMIT_NOFILE:
if (rlp->rlim_cur != RLIM_INFINITY)
return setdtablesize (rlp->rlim_cur);
break;
default:
set_errno (EINVAL);
return -1;
}
return 0;
}
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