dlls/winspool.drv/wspool.c

   1 /******************************************************************************
   2  * Print Spooler Functions
   3  *
   4  *
   5  * Copyright 1999 Thuy Nguyen
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22
  23 #include "config.h"
  24 #include <stdarg.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "wingdi.h"
  29 #include "winspool.h"
  30
  31 #include "winreg.h"
  32 #include "ddk/winsplp.h"
  33 #include "wine/debug.h"
  34
  35 #include "wspool.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(winspool);
  38
  39 /* ############################### */
  40
  41 static CRITICAL_SECTION backend_cs;
  42 static CRITICAL_SECTION_DEBUG backend_cs_debug =
  43 {
  44     0, 0, &backend_cs,
  45     { &backend_cs_debug.ProcessLocksList, &backend_cs_debug.ProcessLocksList },
  46       0, 0, { (DWORD_PTR)(__FILE__ ": backend_cs") }
  47 };
  48 static CRITICAL_SECTION backend_cs = { &backend_cs_debug, -1, 0, 0, 0, 0 };
  49
  50 /* ############################### */
  51
  52 HINSTANCE WINSPOOL_hInstance = NULL;
  53
  54 static HMODULE hlocalspl = NULL;
  55 static BOOL (WINAPI *pInitializePrintProvidor)(LPPRINTPROVIDOR, DWORD, LPWSTR);
  56
  57 PRINTPROVIDOR * backend = NULL;
  58
  59 /******************************************************************************
  60  * load_backend [internal]
  61  *
  62  * load and init our backend (the local printprovider: "localspl.dll")
  63  *
  64  * PARAMS
  65  *
  66  * RETURNS
  67  *  Success: TRUE
  68  *  Failure: FALSE and RPC_S_SERVER_UNAVAILABLE
  69  *
  70  * NOTES
  71  *  In windows, winspool.drv use RPC to interact with the spooler service
  72  *  (spoolsv.exe with spoolss.dll) and the spooler router (spoolss.dll) interact
  73  *  with the correct printprovider (localspl.dll for the local system)
  74  *
  75  */
  76 BOOL load_backend(void)
  77 {
  78     static PRINTPROVIDOR mybackend;
  79     DWORD res;
  80
  81     EnterCriticalSection(&backend_cs);
  82     hlocalspl = LoadLibraryA("localspl.dll");
  83     if (hlocalspl) {
  84         pInitializePrintProvidor = (void *) GetProcAddress(hlocalspl, "InitializePrintProvidor");
  85         if (pInitializePrintProvidor) {
  86
  87             /* native localspl does not clear unused entries */
  88             memset(&mybackend, 0, sizeof(mybackend));
  89             res = pInitializePrintProvidor(&mybackend, sizeof(mybackend), NULL);
  90             if (res) {
  91                 backend = &mybackend;
  92                 LeaveCriticalSection(&backend_cs);
  93                 TRACE("backend: %p (%p)\n", backend, hlocalspl);
  94                 return TRUE;
  95             }
  96         }
  97         FreeLibrary(hlocalspl);
  98     }
  99
 100     LeaveCriticalSection(&backend_cs);
 101
 102     WARN("failed to load the backend: %u\n", GetLastError());
 103     SetLastError(RPC_S_SERVER_UNAVAILABLE);
 104     return FALSE;
 105 }
 106
 107 /******************************************************************************
 108  * unload_backend [internal]
 109  *
 110  */
 111 void unload_backend(void)
 112 {
 113     EnterCriticalSection(&backend_cs);
 114     backend = NULL;
 115     FreeLibrary(hlocalspl);
 116     LeaveCriticalSection(&backend_cs);
 117 }
 118
 119
 120 /******************************************************************************
 121  *  DllMain
 122  *
 123  * Winspool entry point.
 124  *
 125  */
 126 BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD reason, LPVOID lpReserved)
 127 {
 128   switch (reason)
 129   {
 130     case DLL_PROCESS_ATTACH: {
 131       WINSPOOL_hInstance = hInstance;
 132       DisableThreadLibraryCalls(hInstance);
 133       WINSPOOL_LoadSystemPrinters();
 134       break;
 135     }
 136     case DLL_PROCESS_DETACH:
 137       unload_backend();
 138       break;
 139   }
 140
 141   return TRUE;
 142 }