| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * OpenSPARC T2 Processor File: BL_Mutex.h |
| 5 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 6 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES. |
| 7 | * |
| 8 | * The above named program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public |
| 10 | * License version 2 as published by the Free Software Foundation. |
| 11 | * |
| 12 | * The above named program is distributed in the hope that it will be |
| 13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public |
| 18 | * License along with this work; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. |
| 20 | * |
| 21 | * ========== Copyright Header End ============================================ |
| 22 | */ |
| 23 | #ifndef __BL_Mutex_h__ |
| 24 | #define __BL_Mutex_h__ |
| 25 | |
| 26 | //#include <thread.h> |
| 27 | //#include <synch.h> |
| 28 | //#include <errno.h> |
| 29 | #include <stdlib.h> |
| 30 | #include <stdio.h> |
| 31 | #include <pthread.h> |
| 32 | |
| 33 | class BL_CondVar |
| 34 | { |
| 35 | public: |
| 36 | BL_CondVar() { pthread_cond_init(&cond,NULL); } |
| 37 | ~BL_CondVar() { pthread_cond_destroy(&cond); } |
| 38 | |
| 39 | int signal() { return pthread_cond_signal(&cond); } |
| 40 | int broadcast() { return pthread_cond_broadcast(&cond); } |
| 41 | |
| 42 | private: |
| 43 | BL_CondVar( const BL_CondVar& m ) {} |
| 44 | |
| 45 | friend class BL_Mutex; |
| 46 | |
| 47 | pthread_cond_t cond; |
| 48 | }; |
| 49 | |
| 50 | |
| 51 | class BL_Mutex |
| 52 | { |
| 53 | public: |
| 54 | BL_Mutex() { pthread_mutex_init(&mutex,NULL); } |
| 55 | ~BL_Mutex() { pthread_mutex_destroy(&mutex); } |
| 56 | BL_Mutex( const BL_Mutex& m ) |
| 57 | : mutex(m.mutex) |
| 58 | { |
| 59 | // this code guarantees that the mutex is unlock when BL_Mutex is |
| 60 | // copied |
| 61 | if (trylock()) |
| 62 | { |
| 63 | fprintf(stderr, "BL_Mutex( const BL_Mutex& m ): mutex at %p is held\n", |
| 64 | &m.mutex); |
| 65 | exit(1); |
| 66 | } |
| 67 | else |
| 68 | unlock(); |
| 69 | } |
| 70 | |
| 71 | int lock() { return pthread_mutex_lock(&mutex); } |
| 72 | int unlock() { return pthread_mutex_unlock(&mutex); } |
| 73 | int trylock() { return pthread_mutex_trylock(&mutex); } |
| 74 | |
| 75 | int wait( BL_CondVar& cv ) { return pthread_cond_wait(&cv.cond,&mutex); } |
| 76 | |
| 77 | protected: |
| 78 | pthread_mutex_t mutex; |
| 79 | }; |
| 80 | |
| 81 | |
| 82 | // BL_RdWrLock is a wrapper around the solaris pthread_rwlock. |
| 83 | // Be carefull when and where you use this as this lock is at |
| 84 | // least 4.5 times more expensive as a mutex. So don't use this |
| 85 | // to saveguard tlb access for example. Actually avoid using it. |
| 86 | |
| 87 | class BL_RdWrLock |
| 88 | { |
| 89 | public: |
| 90 | BL_RdWrLock() { pthread_rwlock_init(&rw,NULL); } |
| 91 | ~BL_RdWrLock() { pthread_rwlock_destroy(&rw); } |
| 92 | |
| 93 | int rdlock() { return pthread_rwlock_rdlock(&rw); } |
| 94 | int rdunlock() { return pthread_rwlock_unlock(&rw); } |
| 95 | int tryrdlock() { return pthread_rwlock_tryrdlock(&rw); } |
| 96 | |
| 97 | int wrlock() { return pthread_rwlock_wrlock(&rw); } |
| 98 | int wrunlock() { return pthread_rwlock_unlock(&rw); } |
| 99 | int trywrlock() { return pthread_rwlock_trywrlock(&rw); } |
| 100 | |
| 101 | private: |
| 102 | BL_RdWrLock( const BL_RdWrLock& ) {} |
| 103 | |
| 104 | pthread_rwlock_t rw; |
| 105 | }; |
| 106 | |
| 107 | #endif |