/*
 * Copyright (c) 2009, Jay Loden, Giampaolo Rodola'. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#ifndef __PROCESS_HANDLES_H__
#define __PROCESS_HANDLES_H__

#ifndef UNICODE
#define UNICODE
#endif

#include <Python.h>
#include <stdio.h>
#include <windows.h>
#include <strsafe.h>
#include <winternl.h>
#include <psapi.h>


#ifndef NT_SUCCESS
#define NT_SUCCESS(x) ((x) >= 0)
#endif

#define STATUS_INFO_LENGTH_MISMATCH 0xc0000004
#define ObjectBasicInformation 0
#define ObjectNameInformation 1
#define ObjectTypeInformation 2
#define HANDLE_TYPE_FILE 28
#define NTQO_TIMEOUT 100

typedef NTSTATUS (NTAPI *_NtQuerySystemInformation)(
    ULONG SystemInformationClass,
    PVOID SystemInformation,
    ULONG SystemInformationLength,
    PULONG ReturnLength
);

typedef NTSTATUS (NTAPI *_NtQueryObject)(
    HANDLE ObjectHandle,
    ULONG ObjectInformationClass,
    PVOID ObjectInformation,
    ULONG ObjectInformationLength,
    PULONG ReturnLength
);

// Undocumented FILE_INFORMATION_CLASS: FileNameInformation
static const SYSTEM_INFORMATION_CLASS SystemExtendedHandleInformation = (SYSTEM_INFORMATION_CLASS)64;

typedef struct _SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX
{
    PVOID Object;
    HANDLE UniqueProcessId;
    HANDLE HandleValue;
    ULONG GrantedAccess;
    USHORT CreatorBackTraceIndex;
    USHORT ObjectTypeIndex;
    ULONG HandleAttributes;
    ULONG Reserved;
} SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX, *PSYSTEM_HANDLE_TABLE_ENTRY_INFO_EX;

typedef struct _SYSTEM_HANDLE_INFORMATION_EX
{
    ULONG_PTR NumberOfHandles;
    ULONG_PTR Reserved;
    SYSTEM_HANDLE_TABLE_ENTRY_INFO_EX Handles[1];
} SYSTEM_HANDLE_INFORMATION_EX, *PSYSTEM_HANDLE_INFORMATION_EX;

typedef enum _POOL_TYPE {
    NonPagedPool,
    PagedPool,
    NonPagedPoolMustSucceed,
    DontUseThisType,
    NonPagedPoolCacheAligned,
    PagedPoolCacheAligned,
    NonPagedPoolCacheAlignedMustS
} POOL_TYPE, *PPOOL_TYPE;

typedef struct _OBJECT_TYPE_INFORMATION {
    UNICODE_STRING Name;
    ULONG TotalNumberOfObjects;
    ULONG TotalNumberOfHandles;
    ULONG TotalPagedPoolUsage;
    ULONG TotalNonPagedPoolUsage;
    ULONG TotalNamePoolUsage;
    ULONG TotalHandleTableUsage;
    ULONG HighWaterNumberOfObjects;
    ULONG HighWaterNumberOfHandles;
    ULONG HighWaterPagedPoolUsage;
    ULONG HighWaterNonPagedPoolUsage;
    ULONG HighWaterNamePoolUsage;
    ULONG HighWaterHandleTableUsage;
    ULONG InvalidAttributes;
    GENERIC_MAPPING GenericMapping;
    ULONG ValidAccess;
    BOOLEAN SecurityRequired;
    BOOLEAN MaintainHandleCount;
    USHORT MaintainTypeList;
    POOL_TYPE PoolType;
    ULONG PagedPoolUsage;
    ULONG NonPagedPoolUsage;
} OBJECT_TYPE_INFORMATION, *POBJECT_TYPE_INFORMATION;

PVOID GetLibraryProcAddress(PSTR LibraryName, PSTR ProcName);
VOID psutil_get_open_files_init(BOOL threaded);
PyObject* psutil_get_open_files(long pid, HANDLE processHandle);
PyObject* psutil_get_open_files_ntqueryobject(long dwPid, HANDLE hProcess);
PyObject* psutil_get_open_files_getmappedfilename(long dwPid, HANDLE hProcess);
DWORD psutil_NtQueryObject(void);
void psutil_NtQueryObjectThread(void);

#endif // __PROCESS_HANDLES_H__