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/*
* Copyright (c) 2009, 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.
*
* This code is executed on import. It loads private/undocumented
* Windows APIs and sets Windows version constants so that they are
* available globally.
*/
#include <windows.h>
#include <Python.h>
#include "ntextapi.h"
#include "global.h"
// Needed to make these globally visible.
int PSUTIL_WINVER;
SYSTEM_INFO PSUTIL_SYSTEM_INFO;
// A wrapper around GetModuleHandle and GetProcAddress.
PVOID
psutil_GetProcAddress(LPCSTR libname, LPCSTR procname) {
HMODULE mod;
FARPROC addr;
if ((mod = GetModuleHandleA(libname)) == NULL) {
PyErr_SetFromWindowsErrWithFilename(0, libname);
return NULL;
}
if ((addr = GetProcAddress(mod, procname)) == NULL) {
PyErr_SetFromWindowsErrWithFilename(0, procname);
return NULL;
}
return addr;
}
// A wrapper around LoadLibrary and GetProcAddress.
PVOID
psutil_GetProcAddressFromLib(LPCSTR libname, LPCSTR procname) {
HMODULE mod;
FARPROC addr;
Py_BEGIN_ALLOW_THREADS
mod = LoadLibraryA(libname);
Py_END_ALLOW_THREADS
if (mod == NULL) {
PyErr_SetFromWindowsErrWithFilename(0, libname);
return NULL;
}
if ((addr = GetProcAddress(mod, procname)) == NULL) {
PyErr_SetFromWindowsErrWithFilename(0, procname);
FreeLibrary(mod);
return NULL;
}
// Causes crash.
// FreeLibrary(mod);
return addr;
}
static int
psutil_loadlibs() {
/*
* Mandatory.
*/
psutil_NtQuerySystemInformation = psutil_GetProcAddressFromLib(
"ntdll.dll", "NtQuerySystemInformation");
if (psutil_NtQuerySystemInformation == NULL)
return 1;
psutil_NtQueryInformationProcess = psutil_GetProcAddress(
"ntdll.dll", "NtQueryInformationProcess");
if (! psutil_NtQueryInformationProcess)
return 1;
psutil_NtSetInformationProcess = psutil_GetProcAddress(
"ntdll.dll", "NtSetInformationProcess");
if (! psutil_NtSetInformationProcess)
return 1;
psutil_WinStationQueryInformationW = psutil_GetProcAddressFromLib(
"winsta.dll", "WinStationQueryInformationW");
if (! psutil_WinStationQueryInformationW)
return 1;
psutil_NtQueryObject = psutil_GetProcAddressFromLib(
"ntdll.dll", "NtQueryObject");
if (! psutil_NtQueryObject)
return 1;
psutil_rtlIpv4AddressToStringA = psutil_GetProcAddressFromLib(
"ntdll.dll", "RtlIpv4AddressToStringA");
if (! psutil_rtlIpv4AddressToStringA)
return 1;
// minimum requirement: Win XP SP3
psutil_GetExtendedTcpTable = psutil_GetProcAddressFromLib(
"iphlpapi.dll", "GetExtendedTcpTable");
if (! psutil_GetExtendedTcpTable)
return 1;
// minimum requirement: Win XP SP3
psutil_GetExtendedUdpTable = psutil_GetProcAddressFromLib(
"iphlpapi.dll", "GetExtendedUdpTable");
if (! psutil_GetExtendedUdpTable)
return 1;
psutil_RtlGetVersion = psutil_GetProcAddressFromLib(
"ntdll.dll", "RtlGetVersion");
if (! psutil_RtlGetVersion)
return 1;
psutil_NtSuspendProcess = psutil_GetProcAddressFromLib(
"ntdll", "NtSuspendProcess");
if (! psutil_NtSuspendProcess)
return 1;
psutil_NtResumeProcess = psutil_GetProcAddressFromLib(
"ntdll", "NtResumeProcess");
if (! psutil_NtResumeProcess)
return 1;
psutil_NtQueryVirtualMemory = psutil_GetProcAddressFromLib(
"ntdll", "NtQueryVirtualMemory");
if (! psutil_NtQueryVirtualMemory)
return 1;
/*
* Optional.
*/
// not available on Wine
psutil_rtlIpv6AddressToStringA = psutil_GetProcAddressFromLib(
"ntdll.dll", "RtlIpv6AddressToStringA");
// minimum requirement: Win Vista
psutil_GetTickCount64 = psutil_GetProcAddress(
"kernel32", "GetTickCount64");
// minimum requirement: Win 7
psutil_GetActiveProcessorCount = psutil_GetProcAddress(
"kernel32", "GetActiveProcessorCount");
// minumum requirement: Win 7
psutil_GetLogicalProcessorInformationEx = psutil_GetProcAddressFromLib(
"kernel32", "GetLogicalProcessorInformationEx");
PyErr_Clear();
return 0;
}
static int
psutil_set_winver() {
RTL_OSVERSIONINFOEXW versionInfo;
ULONG maj;
ULONG min;
versionInfo.dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
memset(&versionInfo, 0, sizeof(RTL_OSVERSIONINFOEXW));
psutil_RtlGetVersion((PRTL_OSVERSIONINFOW)&versionInfo);
maj = versionInfo.dwMajorVersion;
min = versionInfo.dwMinorVersion;
if (maj == 5 && min == 1)
PSUTIL_WINVER = PSUTIL_WINDOWS_XP;
else if (maj == 5 && min == 2)
PSUTIL_WINVER = PSUTIL_WINDOWS_SERVER_2003;
else if (maj == 6 && min == 0)
PSUTIL_WINVER = PSUTIL_WINDOWS_VISTA; // or Server 2008
else if (maj == 6 && min == 1)
PSUTIL_WINVER = PSUTIL_WINDOWS_7;
else if (maj == 6 && min == 2)
PSUTIL_WINVER = PSUTIL_WINDOWS_8;
else if (maj == 6 && min == 3)
PSUTIL_WINVER = PSUTIL_WINDOWS_8_1;
else if (maj == 10 && min == 0)
PSUTIL_WINVER = PSUTIL_WINDOWS_10;
else
PSUTIL_WINVER = PSUTIL_WINDOWS_NEW;
return 0;
}
static int
psutil_load_sysinfo() {
GetSystemInfo(&PSUTIL_SYSTEM_INFO);
return 0;
}
int
psutil_load_globals() {
if (psutil_loadlibs() != 0)
return 1;
if (psutil_set_winver() != 0)
return 1;
if (psutil_load_sysinfo() != 0)
return 1;
return 0;
}
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