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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the Apache 2.0 License.
// See the LICENSE file in the project root for more information.
#nullable enable
using System;
using System.Numerics;
using System.Linq;
using System.Runtime.InteropServices;
using System.Runtime.Versioning;
using Microsoft.Scripting.Runtime;
using IronPython.Runtime;
using IronPython.Runtime.Exceptions;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
[assembly: PythonModule("resource", typeof(IronPython.Modules.PythonResourceModule), PlatformsAttribute.PlatformFamily.Unix)]
namespace IronPython.Modules;
[SupportedOSPlatform("linux")]
[SupportedOSPlatform("macos")]
public static class PythonResourceModule {
public const string __doc__ = "Provides basic mechanisms for measuring and controlling system resources utilized by a program. Unix only.";
[Obsolete("Deprecated in favor of OSError.")]
public static PythonType error => PythonExceptions.OSError;
#region Constants
public static BigInteger RLIM_INFINITY
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(BigInteger)long.MaxValue : BigInteger.MinusOne;
public static int RLIMIT_CPU
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_CPU : (int)linux__rlimit_resource.RLIMIT_CPU;
public static int RLIMIT_FSIZE
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_FSIZE : (int)linux__rlimit_resource.RLIMIT_FSIZE;
public static int RLIMIT_DATA
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_DATA : (int)linux__rlimit_resource.RLIMIT_DATA;
public static int RLIMIT_STACK
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_STACK : (int)linux__rlimit_resource.RLIMIT_STACK;
public static int RLIMIT_CORE
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_CORE : (int)linux__rlimit_resource.RLIMIT_CORE;
public static int RLIMIT_RSS
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_RSS : (int)linux__rlimit_resource.RLIMIT_RSS;
public static int RLIMIT_AS
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_AS : (int)linux__rlimit_resource.RLIMIT_AS;
public static int RLIMIT_MEMLOCK
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_MEMLOCK : (int)linux__rlimit_resource.RLIMIT_MEMLOCK;
public static int RLIMIT_NPROC
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_NPROC : (int)linux__rlimit_resource.RLIMIT_NPROC;
public static int RLIMIT_NOFILE
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)macos__rlimit_resource.RLIMIT_NOFILE : (int)linux__rlimit_resource.RLIMIT_NOFILE;
[PythonHidden(PlatformID.MacOSX)]
public static int RLIMIT_OFILE => RLIMIT_NOFILE;
[PythonHidden(PlatformID.MacOSX)]
public static int RLIMIT_LOCKS => (int)linux__rlimit_resource.RLIMIT_LOCKS;
[PythonHidden(PlatformID.MacOSX)]
public static int RLIMIT_SIGPENDING => (int)linux__rlimit_resource.RLIMIT_SIGPENDING;
[PythonHidden(PlatformID.MacOSX)]
public static int RLIMIT_MSGQUEUE => (int)linux__rlimit_resource.RLIMIT_MSGQUEUE;
[PythonHidden(PlatformID.MacOSX)]
public static int RLIMIT_NICE => (int)linux__rlimit_resource.RLIMIT_NICE;
[PythonHidden(PlatformID.MacOSX)]
public static int RLIMIT_RTPRIO => (int)linux__rlimit_resource.RLIMIT_RTPRIO;
[PythonHidden(PlatformID.MacOSX)]
public static int RLIMIT_RTTIME => (int)linux__rlimit_resource.RLIMIT_RTTIME;
private static int RLIM_NLIMITS
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
(int)(macos__rlimit_resource.RLIM_NLIMITS) : (int)(linux__rlimit_resource.RLIM_NLIMITS);
public static int RUSAGE_SELF => 0;
public static int RUSAGE_CHILDREN => -1;
[PythonHidden(PlatformID.MacOSX)]
public static int RUSAGE_THREAD => 1;
#endregion
[LightThrowing]
public static object getrlimit(int resource) {
if (resource < 0 || resource >= RLIM_NLIMITS) {
return LightExceptions.Throw(PythonOps.ValueError("invalid resource specified"));
}
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf<rlimit>());
try {
int retval = getrlimit(resource, ptr);
if (retval != 0) return GetPInvokeError();
rlimit res = Marshal.PtrToStructure<rlimit>(ptr);
return PythonTuple.MakeTuple(res.rlim_cur.ToPythonInt(), res.rlim_max.ToPythonInt());
} finally {
Marshal.FreeHGlobal(ptr);
}
}
[LightThrowing]
public static object? setrlimit(int resource, [NotNone] object limits) {
if (resource < 0 || resource >= RLIM_NLIMITS) {
return LightExceptions.Throw(PythonOps.ValueError("invalid resource specified"));
}
rlimit data;
var cursor = PythonOps.GetEnumerator(limits);
if (GetLimitValue(cursor) is not long rlim_cur) return LimitsArgError();
data.rlim_cur = unchecked((ulong)rlim_cur);
if (GetLimitValue(cursor) is not long rlim_max) return LimitsArgError();
data.rlim_max = unchecked((ulong)rlim_max);
if (cursor.MoveNext()) return LimitsArgError();
if (data.rlim_cur > data.rlim_max) return LightExceptions.Throw(PythonOps.ValueError("current limit exceed maximum limit"));
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf<rlimit>());
try {
Marshal.StructureToPtr(data, ptr, fDeleteOld: false);
int retval = setrlimit(resource, ptr);
// TODO: for full CPython compliance, return ValueError iso OSError if non-superuser tries to raise max limit
if (retval != 0) return GetPInvokeError();
} finally {
Marshal.FreeHGlobal(ptr);
}
return null;
}
[PythonHidden(PlatformID.MacOSX)]
[SupportedOSPlatform("linux")]
[LightThrowing]
public static object prlimit(int pid, int resource) {
if (resource < 0 || resource >= RLIM_NLIMITS) {
return LightExceptions.Throw(PythonOps.ValueError("invalid resource specified"));
}
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf<rlimit>());
try {
int retval = prlimit(pid, resource, IntPtr.Zero, ptr);
if (retval != 0) return GetPInvokeError();
rlimit res = Marshal.PtrToStructure<rlimit>(ptr);
return PythonTuple.MakeTuple(res.rlim_cur.ToPythonInt(), res.rlim_max.ToPythonInt());
} finally {
Marshal.FreeHGlobal(ptr);
}
}
[PythonHidden(PlatformID.MacOSX)]
[SupportedOSPlatform("linux")]
[LightThrowing]
public static object prlimit(int pid, int resource, [NotNone] object limits) {
if (resource < 0 || resource >= RLIM_NLIMITS) {
return LightExceptions.Throw(PythonOps.ValueError("invalid resource specified"));
}
rlimit data;
var cursor = PythonOps.GetEnumerator(limits);
if (GetLimitValue(cursor) is not long rlim_cur) return LimitsArgError();
data.rlim_cur = unchecked((ulong)rlim_cur);
if (GetLimitValue(cursor) is not long rlim_max) return LimitsArgError();
data.rlim_max = unchecked((ulong)rlim_max);
if (cursor.MoveNext()) return LimitsArgError();
if (data.rlim_cur > data.rlim_max) return LightExceptions.Throw(PythonOps.ValueError("current limit exceed maximum limit"));
IntPtr ptr_new = IntPtr.Zero;
IntPtr ptr_old = IntPtr.Zero;
try {
ptr_new = Marshal.AllocHGlobal(Marshal.SizeOf<rlimit>());
ptr_old = Marshal.AllocHGlobal(Marshal.SizeOf<rlimit>());
Marshal.StructureToPtr(data, ptr_new, fDeleteOld: false);
int retval = prlimit(pid, resource, ptr_new, ptr_old);
// TODO: for full CPython compliance, return ValueError iso OSError if non-superuser tries to raise max limit
if (retval != 0) return GetPInvokeError();
rlimit res = Marshal.PtrToStructure<rlimit>(ptr_old);
return PythonTuple.MakeTuple(res.rlim_cur.ToPythonInt(), res.rlim_max.ToPythonInt());
} finally {
if (ptr_new != IntPtr.Zero) Marshal.FreeHGlobal(ptr_new);
if (ptr_old != IntPtr.Zero) Marshal.FreeHGlobal(ptr_old);
}
}
[LightThrowing]
public static object getrusage(int who) {
int maxWho = RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? 0 : 1;
if (who < -1 || who > maxWho) return LightExceptions.Throw(PythonOps.ValueError("invalid who parameter"));
IntPtr ptr = Marshal.AllocHGlobal(Marshal.SizeOf<rusage>());
try {
int retval = getrusage(who, ptr);
if (retval != 0) return GetPInvokeError();
rusage res = Marshal.PtrToStructure<rusage>(ptr);
return new struct_rusage(res);
} finally {
Marshal.FreeHGlobal(ptr);
}
}
public static int getpagesize() {
return Environment.SystemPageSize;
}
[PythonType]
public sealed class struct_rusage : PythonTuple {
public const int n_fields = 16;
public const int n_sequence_fields = 16;
public const int n_unnamed_fields = 0;
private struct_rusage(object?[] sequence) : base(sequence) {
if (__len__() != n_sequence_fields)
throw PythonOps.TypeError("resource.struct_rusage() takes a {0}-sequence ({1}-sequence given)", n_sequence_fields, __len__());
}
private struct_rusage(object o) : base(o) {
if (__len__() != n_sequence_fields)
throw PythonOps.TypeError("resource.struct_rusage() takes a {0}-sequence ({1}-sequence given)", n_sequence_fields, __len__());
}
internal struct_rusage(rusage data)
: this(
new object[n_sequence_fields] {
data.ru_utime.GetTime(),
data.ru_stime.GetTime(),
data.ru_maxrss.ToPythonInt(),
data.ru_ixrss.ToPythonInt(),
data.ru_idrss.ToPythonInt(),
data.ru_isrss.ToPythonInt(),
data.ru_minflt.ToPythonInt(),
data.ru_majflt.ToPythonInt(),
data.ru_nswap.ToPythonInt(),
data.ru_inblock.ToPythonInt(),
data.ru_oublock.ToPythonInt(),
data.ru_msgsnd.ToPythonInt(),
data.ru_msgrcv.ToPythonInt(),
data.ru_nsignals.ToPythonInt(),
data.ru_nvcsw.ToPythonInt(),
data.ru_nivcsw.ToPythonInt(),
}
) { }
public static struct_rusage __new__([NotNone] PythonType cls, [NotNone] object sequence, PythonDictionary? dict = null)
=> new struct_rusage(sequence);
public object? ru_utime => this[0];
public object? ru_stime => this[1];
public object? ru_maxrss => this[2];
public object? ru_ixrss => this[3];
public object? ru_idrss => this[4];
public object? ru_isrss => this[5];
public object? ru_minflt => this[6];
public object? ru_majflt => this[7];
public object? ru_nswap => this[8];
public object? ru_inblock => this[9];
public object? ru_oublock => this[10];
public object? ru_msgsnd => this[11];
public object? ru_msgrcv => this[12];
public object? ru_nsignals => this[13];
public object? ru_nvcsw => this[14];
public object? ru_nivcsw => this[15];
public override string __repr__(CodeContext/*!*/ context) {
return string.Format("resource.struct_rusage("
+ "ru_utime={0}, "
+ "ru_stime={1}, "
+ "ru_maxrss={2}, "
+ "ru_ixrss={3}, "
+ "ru_idrss={4}, "
+ "ru_isrss={5}, "
+ "ru_minflt={6}, "
+ "ru_majflt={7}, "
+ "ru_nswap={8}, "
+ "ru_inblock={9}, "
+ "ru_oublock={10}, "
+ "ru_msgsnd={11}, "
+ "ru_msgrcv={12}, "
+ "ru_nsignals={13}, "
+ "ru_nvcsw={14}, "
+ "ru_nivcsw={15})",
this.Select(v => PythonOps.Repr(context, v)).ToArray());
}
}
private static long? GetLimitValue(System.Collections.IEnumerator cursor) {
if (!cursor.MoveNext() || !PythonOps.TryToIndex(cursor.Current, out BigInteger lim))
return null;
long rlim = checked((long)lim);
if (rlim < 0 && RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
rlim -= long.MinValue;
return rlim;
}
private static object LimitsArgError()
=> LightExceptions.Throw(PythonOps.ValueError("expected a tuple of 2 integers"));
private static object GetPInvokeError() {
int errno = Marshal.GetLastWin32Error(); // despite its name, on Posix it retrieves errno set by the last p/Invoke call
return LightExceptions.Throw(PythonOps.OSError(errno, PythonNT.strerror(errno)));
}
private static object ToPythonInt(this ulong value)
=> unchecked((long)value).ToPythonInt();
private static object ToPythonInt(this long value)
=> value is <= int.MaxValue and >= int.MinValue ? (int)value : (BigInteger)value;
private struct rlimit {
// /usr/include/x86_64-linux-gnu/bits/resource.h
// /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/resource.h
public ulong rlim_cur;
public ulong rlim_max;
}
#pragma warning disable CS0649 // Field is never assigned to, and will always have its default value
internal struct timeval {
// /usr/include/x86_64-linux-gnu/bits/types/struct_timeval.h, .../bits/types.h
// /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/_types/_timeval.h, .../i386/_types.h, .../arm64/_types.h
public long tv_sec;
public long tv_usec; // long on Linux but int on Darwin
public double GetTime()
=> RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ?
tv_sec + (tv_usec & 0xFFFF_FFFF) * 1e-6 :
tv_sec + tv_usec * 1e-6;
}
internal struct rusage {
// /usr/include/x86_64-linux-gnu/bits/types/struct_rusage.h
// /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/resource.h
public timeval ru_utime; // user CPU time used
public timeval ru_stime; // system CPU time used
public long ru_maxrss; // maximum resident set size
public long ru_ixrss; // integral shared memory size
public long ru_idrss; // integral unshared data size
public long ru_isrss; // integral unshared stack size
public long ru_minflt; // page reclaims (soft page faults)
public long ru_majflt; // page faults (hard page faults)
public long ru_nswap; // swaps
public long ru_inblock; // block input operations
public long ru_oublock; // block output operations
public long ru_msgsnd; // IPC messages sent
public long ru_msgrcv; // IPC messages received
public long ru_nsignals; // signals received
public long ru_nvcsw; // voluntary context switches
public long ru_nivcsw; // involuntary context switches
}
#pragma warning restore CS0649
[DllImport("libc", SetLastError = true)]
private static extern int getrlimit(int resource, /*rlimit*/ IntPtr rlimits);
[DllImport("libc", SetLastError = true)]
private static extern int setrlimit(int resource, /*const rlimit*/ IntPtr rlimits);
[DllImport("libc", SetLastError = true)]
[SupportedOSPlatform("linux")]
private static extern int prlimit(int pid, int resource, /*const rlimit*/ IntPtr new_limit, /*rlimit*/ IntPtr old_limit);
[DllImport("libc", SetLastError = true)]
private static extern int getrusage(int who, /*rusage*/ IntPtr usage);
private enum linux__rlimit_resource {
// /usr/include/x86_64-linux-gnu/sys/resource.h
RLIMIT_CPU = 0, // Per-process CPU limit
RLIMIT_FSIZE = 1, // Maximum filesize
RLIMIT_DATA = 2, // Maximum size of data segment
RLIMIT_STACK = 3, // Maximum size of stack segment
RLIMIT_CORE = 4, // Maximum size of core file
RLIMIT_RSS = 5, // Largest resident set size
RLIMIT_NPROC = 6, // Maximum number of processes
RLIMIT_NOFILE = 7, // Maximum number of open files
RLIMIT_MEMLOCK = 8, // Maximum locked-in-memory address space
RLIMIT_AS = 9, // Address space limit
RLIMIT_LOCKS = 10, // Maximum number of file locks
RLIMIT_SIGPENDING = 11, // Maximum number of pending signals
RLIMIT_MSGQUEUE = 12, // Maximum bytes in POSIX message queues
RLIMIT_NICE = 13, // Maximum nice prio allowed to raise to (20 added to get a non-negative number)
RLIMIT_RTPRIO = 14, // Maximum realtime priority
RLIMIT_RTTIME = 15, // Time slice in us
RLIM_NLIMITS
};
private enum macos__rlimit_resource {
// /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/sys/resource.h
RLIMIT_CPU = 0,
RLIMIT_FSIZE = 1,
RLIMIT_DATA = 2,
RLIMIT_STACK = 3,
RLIMIT_CORE = 4,
RLIMIT_RSS = 5,
RLIMIT_AS = 5,
RLIMIT_MEMLOCK = 6,
RLIMIT_NPROC = 7,
RLIMIT_NOFILE = 8,
RLIM_NLIMITS
}
}