1 /* 2 * Copyright 2009 Niels Provos and Nick Mathewson 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 3. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 #include "event-config.h" 27 28 #ifdef WIN32 29 #include <winsock2.h> 30 #define WIN32_LEAN_AND_MEAN 31 #include <windows.h> 32 #undef WIN32_LEAN_AND_MEAN 33 #include <sys/locking.h> 34 #endif 35 36 struct event_base; 37 #include <event2/thread.h> 38 39 #include "mm-internal.h" 40 41 static void * 42 evthread_win32_lock_create(unsigned locktype) 43 { 44 CRITICAL_SECTION *lock = mm_malloc(sizeof(CRITICAL_SECTION)); 45 if (!lock) 46 return NULL; 47 InitializeCriticalSection(lock); 48 return lock; 49 } 50 51 static void 52 evthread_win32_lock_free(void *_lock, unsigned locktype) 53 { 54 CRITICAL_SECTION *lock = _lock; 55 DeleteCriticalSection(lock); 56 mm_free(lock); 57 } 58 59 static int 60 evthread_win32_lock(unsigned mode, void *_lock) 61 { 62 CRITICAL_SECTION *lock = _lock; 63 if ((mode & EVTHREAD_TRY)) { 64 return TryEnterCriticalSection(lock) != 0; 65 } else { 66 EnterCriticalSection(lock); 67 return 0; 68 } 69 } 70 71 static int 72 evthread_win32_unlock(unsigned mode, void *_lock) 73 { 74 CRITICAL_SECTION *lock = _lock; 75 LeaveCriticalSection(lock); 76 return 0; 77 } 78 79 static unsigned long 80 evthread_win32_get_id(void) 81 { 82 return (unsigned long) GetCurrentThreadId(); 83 } 84 85 int 86 evthread_use_windows_threads(void) 87 { 88 struct evthread_lock_callbacks cbs = { 89 EVTHREAD_LOCK_API_VERSION, 90 EVTHREAD_LOCKTYPE_RECURSIVE, 91 evthread_win32_lock_create, 92 evthread_win32_lock_free, 93 evthread_win32_lock, 94 evthread_win32_unlock 95 }; 96 97 evthread_set_lock_callbacks(&cbs); 98 evthread_set_id_callback(evthread_win32_get_id); 99 return 0; 100 } 101 102