1 /* 2 Copyright (c) 2011-2016 mingw-w64 project 3 4 Permission is hereby granted, free of charge, to any person obtaining a 5 copy of this software and associated documentation files (the "Software"), 6 to deal in the Software without restriction, including without limitation 7 the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 and/or sell copies of the Software, and to permit persons to whom the 9 Software is furnished to do so, subject to the following conditions: 10 11 The above copyright notice and this permission notice shall be included in 12 all copies or substantial portions of the Software. 13 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 19 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 20 DEALINGS IN THE SOFTWARE. 21 */ 22 23 #ifndef WIN_PTHREADS_RWLOCK_H 24 #define WIN_PTHREADS_RWLOCK_H 25 26 #define LIFE_RWLOCK 0xBAB1F0ED 27 #define DEAD_RWLOCK 0xDEADB0EF 28 29 #define INIT_RWLOCK(rwl) { int r; \ 30 if (STATIC_RWL_INITIALIZER(*rwl)) { if ((r = rwlock_static_init(rwl))) { if (r != EBUSY) return r; }}} 31 32 #define STATIC_RWL_INITIALIZER(x) ((pthread_rwlock_t)(x) == ((pthread_rwlock_t)PTHREAD_RWLOCK_INITIALIZER)) 33 34 typedef struct rwlock_t rwlock_t; 35 struct rwlock_t { 36 unsigned int valid; 37 int busy; 38 LONG nex_count; /* Exclusive access counter. */ 39 LONG nsh_count; /* Shared access counter. */ 40 LONG ncomplete; /* Shared completed counter. */ 41 pthread_mutex_t mex; /* Exclusive access protection. */ 42 pthread_mutex_t mcomplete; /* Shared completed protection. */ 43 pthread_cond_t ccomplete; /* Shared access completed queue. */ 44 }; 45 46 #define RWL_SET 0x01 47 #define RWL_TRY 0x02 48 49 void rwl_print(volatile pthread_rwlock_t *rwl, char *txt); 50 void rwl_print_set(int state); 51 52 #endif 53