sal/systools/win32/uwinapi/EnumProcesses.cpp

   1 #include "macros.h"
   2 #include <tlhelp32.h>
   3
   4 IMPLEMENT_THUNK( psapi, WINDOWS, BOOL, WINAPI, EnumProcesses, ( LPDWORD lpProcesses, DWORD cbSize, LPDWORD lpcbCopied ) )
   5 {
   6     BOOL        fSuccess = FALSE;
   7     HANDLE      hSnapshot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0 );
   8
   9     if ( IsValidHandle( hSnapshot ) )
  10     {
  11         PROCESSENTRY32  pe;
  12
  13         if ( lpcbCopied )
  14             *lpcbCopied = 0;
  15
  16         pe.dwSize = sizeof(pe);
  17         if ( Process32First( hSnapshot, &pe ) )
  18         {
  19             fSuccess = TRUE;
  20
  21             while ( cbSize >= sizeof(*lpProcesses) )
  22             {
  23                 *(lpProcesses++) = pe.th32ProcessID;
  24                 if ( lpcbCopied )
  25                     *lpcbCopied += sizeof(*lpProcesses);
  26                 cbSize -= sizeof(*lpProcesses);
  27
  28                 if ( !Process32Next( hSnapshot, &pe ) )
  29                     break;
  30             }
  31         }
  32
  33         CloseHandle( hSnapshot );
  34     }
  35     else
  36         SetLastError( ERROR_INVALID_HANDLE );
  37
  38     return fSuccess;
  39 }
  40
  41