xref: /aoo41x/main/sal/systools/win32/uwinapi/EnumProcesses.cpp (revision fc0bc008)

/**************************************************************
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
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#include "macros.h"
#include <tlhelp32.h>

IMPLEMENT_THUNK( psapi, WINDOWS, BOOL, WINAPI, EnumProcesses, ( LPDWORD lpProcesses, DWORD cbSize, LPDWORD lpcbCopied ) )
{
	BOOL	fSuccess = FALSE;
	HANDLE	hSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );

	if ( IsValidHandle( hSnapshot ) )
	{
		PROCESSENTRY32	pe;

		if ( lpcbCopied )
			*lpcbCopied = 0;

		pe.dwSize = sizeof(pe);
		if ( Process32First( hSnapshot, &pe ) )
		{
			fSuccess = TRUE;

			while ( cbSize >= sizeof(*lpProcesses) )
			{
				*(lpProcesses++) = pe.th32ProcessID;
				if ( lpcbCopied )
					*lpcbCopied += sizeof(*lpProcesses);
				cbSize -= sizeof(*lpProcesses);

				if ( !Process32Next( hSnapshot, &pe ) )
					break;
			}
		}

		CloseHandle( hSnapshot );
	}
	else
		SetLastError( ERROR_INVALID_HANDLE );

	return fSuccess;
}