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 #include <stdarg.h>
  22
  23 #include "windef.h"
  24 #include "winbase.h"
  25 #include "wingdi.h"
  26 #include "winspool.h"
  27 #include "winreg.h"
  28 #include "winternl.h"
  29 #include "ddk/winsplp.h"
  30 #include "wine/debug.h"
  31 #include "wine/unixlib.h"
  32
  33 #include "wspool.h"
  34
  35 WINE_DEFAULT_DEBUG_CHANNEL(winspool);
  36
  37 /* ############################### */
  38
  39 static CRITICAL_SECTION backend_cs;
  40 static CRITICAL_SECTION_DEBUG backend_cs_debug =
  41 {
  42     0, 0, &backend_cs,
  43     { &backend_cs_debug.ProcessLocksList, &backend_cs_debug.ProcessLocksList },
  44       0, 0, { (DWORD_PTR)(__FILE__ ": backend_cs") }
  45 };
  46 static CRITICAL_SECTION backend_cs = { &backend_cs_debug, -1, 0, 0, 0, 0 };
  47
  48 /* ############################### */
  49
  50 HINSTANCE WINSPOOL_hInstance = NULL;
  51
  52 static HMODULE hlocalspl;
  53 static BOOL (WINAPI *pInitializePrintProvidor)(LPPRINTPROVIDOR, DWORD, LPWSTR);
  54 PRINTPROVIDOR *backend = NULL;
  55
  56 /******************************************************************************
  57  * load_backend [internal]
  58  *
  59  * load and init our backend (the local printprovider: "localspl.dll")
  60  *
  61  * PARAMS
  62  *
  63  * RETURNS
  64  *  Success: TRUE
  65  *  Failure: FALSE and RPC_S_SERVER_UNAVAILABLE
  66  *
  67  * NOTES
  68  *  In windows, winspool.drv use RPC to interact with the spooler service
  69  *  (spoolsv.exe with spoolss.dll) and the spooler router (spoolss.dll) interact
  70  *  with the correct printprovider (localspl.dll for the local system)
  71  *
  72  */
  73 BOOL load_backend(void)
  74 {
  75     static PRINTPROVIDOR mybackend;
  76     DWORD res;
  77
  78     EnterCriticalSection(&backend_cs);
  79     hlocalspl = LoadLibraryA("localspl.dll");
  80     if (hlocalspl) {
  81         pInitializePrintProvidor = (void *) GetProcAddress(hlocalspl, "InitializePrintProvidor");
  82         if (pInitializePrintProvidor) {
  83
  84             /* native localspl does not clear unused entries */
  85             memset(&mybackend, 0, sizeof(mybackend));
  86             res = pInitializePrintProvidor(&mybackend, sizeof(mybackend), NULL);
  87             if (res) {
  88                 backend = &mybackend;
  89                 LeaveCriticalSection(&backend_cs);
  90                 TRACE("backend: %p (%p)\n", backend, hlocalspl);
  91                 return TRUE;
  92             }
  93         }
  94         FreeLibrary(hlocalspl);
  95     }
  96
  97     LeaveCriticalSection(&backend_cs);
  98
  99     WARN("failed to load the backend: %lu\n", GetLastError());
 100     SetLastError(RPC_S_SERVER_UNAVAILABLE);
 101     return FALSE;
 102 }
 103
 104 /******************************************************************************
 105  *  DllMain
 106  *
 107  * Winspool entry point.
 108  *
 109  */
 110 BOOL WINAPI DllMain( HINSTANCE instance, DWORD reason, void *reserved )
 111 {
 112     switch (reason)
 113     {
 114     case DLL_PROCESS_ATTACH:
 115         WINSPOOL_hInstance = instance;
 116         DisableThreadLibraryCalls( instance );
 117         if (!__wine_init_unix_call())
 118             UNIX_CALL( process_attach, NULL );
 119         WINSPOOL_LoadSystemPrinters();
 120         break;
 121
 122     case DLL_PROCESS_DETACH:
 123         if (reserved) break;
 124         DeleteCriticalSection(&backend_cs);
 125         FreeLibrary(hlocalspl);
 126         break;
 127     }
 128
 129     return TRUE;
 130 }