ntdllmn.c (1641B)
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 24 BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved) { 25 PRThread* me; 26 27 switch (fdwReason) { 28 case DLL_PROCESS_ATTACH: 29 /* 30 * If lpvReserved is NULL, we are dynamically loaded 31 * and therefore can't use static thread-local storage. 32 */ 33 if (lpvReserved == NULL) { 34 _pr_use_static_tls = FALSE; 35 } else { 36 _pr_use_static_tls = TRUE; 37 } 38 break; 39 case DLL_THREAD_ATTACH: 40 break; 41 case DLL_THREAD_DETACH: 42 if (_pr_initialized) { 43 me = _MD_GET_ATTACHED_THREAD(); 44 if ((me != NULL) && (me->flags & _PR_ATTACHED)) { 45 _PRI_DetachThread(); 46 } 47 } 48 break; 49 case DLL_PROCESS_DETACH: 50 break; 51 } 52 return TRUE; 53 }