1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 /* 7 * The DLL entry point (DllMain) for NSPR. 8 * 9 * The only reason we use DLLMain() now is to find out whether 10 * the NSPR DLL is statically or dynamically loaded. When 11 * dynamically loaded, we cannot use static thread-local storage. 12 * However, static TLS is faster than the TlsXXX() functions. 13 * So we want to use static TLS whenever we can. A global 14 * variable _pr_use_static_tls is set in DllMain() during process 15 * attachment to indicate whether it is safe to use static TLS 16 * or not. 17 */ 18 19 #include <windows.h> 20 #include <primpl.h> 21 22 extern BOOL _pr_use_static_tls; /* defined in ntthread.c */ 23 DllMain(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)24BOOL WINAPI DllMain( 25 HINSTANCE hinstDLL, 26 DWORD fdwReason, 27 LPVOID lpvReserved) 28 { 29 PRThread *me; 30 31 switch (fdwReason) { 32 case DLL_PROCESS_ATTACH: 33 /* 34 * If lpvReserved is NULL, we are dynamically loaded 35 * and therefore can't use static thread-local storage. 36 */ 37 if (lpvReserved == NULL) { 38 _pr_use_static_tls = FALSE; 39 } else { 40 _pr_use_static_tls = TRUE; 41 } 42 break; 43 case DLL_THREAD_ATTACH: 44 break; 45 case DLL_THREAD_DETACH: 46 if (_pr_initialized) { 47 me = _MD_GET_ATTACHED_THREAD(); 48 if ((me != NULL) && (me->flags & _PR_ATTACHED)) { 49 _PRI_DetachThread(); 50 } 51 } 52 break; 53 case DLL_PROCESS_DETACH: 54 break; 55 } 56 return TRUE; 57 } 58