Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "rsSignal.h" |
| 18 | |
| 19 | using namespace android; |
| 20 | using namespace android::renderscript; |
| 21 | |
| 22 | |
Alex Sakhartchouk | ed9f210 | 2010-11-09 17:00:54 -0800 | [diff] [blame] | 23 | Signal::Signal() { |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 24 | mSet = true; |
| 25 | } |
| 26 | |
Alex Sakhartchouk | ed9f210 | 2010-11-09 17:00:54 -0800 | [diff] [blame] | 27 | Signal::~Signal() { |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 28 | pthread_mutex_destroy(&mMutex); |
| 29 | pthread_cond_destroy(&mCondition); |
| 30 | } |
| 31 | |
Alex Sakhartchouk | ed9f210 | 2010-11-09 17:00:54 -0800 | [diff] [blame] | 32 | bool Signal::init() { |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 33 | int status = pthread_mutex_init(&mMutex, NULL); |
| 34 | if (status) { |
| 35 | LOGE("LocklessFifo mutex init failure"); |
| 36 | return false; |
| 37 | } |
| 38 | |
| 39 | status = pthread_cond_init(&mCondition, NULL); |
| 40 | if (status) { |
| 41 | LOGE("LocklessFifo condition init failure"); |
| 42 | pthread_mutex_destroy(&mMutex); |
| 43 | return false; |
| 44 | } |
| 45 | |
| 46 | return true; |
| 47 | } |
| 48 | |
Alex Sakhartchouk | ed9f210 | 2010-11-09 17:00:54 -0800 | [diff] [blame] | 49 | void Signal::set() { |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 50 | int status; |
| 51 | |
| 52 | status = pthread_mutex_lock(&mMutex); |
| 53 | if (status) { |
| 54 | LOGE("LocklessCommandFifo: error %i locking for set condition.", status); |
| 55 | return; |
| 56 | } |
| 57 | |
| 58 | mSet = true; |
| 59 | |
| 60 | status = pthread_cond_signal(&mCondition); |
| 61 | if (status) { |
| 62 | LOGE("LocklessCommandFifo: error %i on set condition.", status); |
| 63 | } |
| 64 | |
| 65 | status = pthread_mutex_unlock(&mMutex); |
| 66 | if (status) { |
| 67 | LOGE("LocklessCommandFifo: error %i unlocking for set condition.", status); |
| 68 | } |
| 69 | } |
| 70 | |
Jason Sams | bfc7891 | 2011-08-12 15:05:15 -0700 | [diff] [blame] | 71 | bool Signal::wait(uint64_t timeout) { |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 72 | int status; |
Jason Sams | bfc7891 | 2011-08-12 15:05:15 -0700 | [diff] [blame] | 73 | bool ret = false; |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 74 | |
| 75 | status = pthread_mutex_lock(&mMutex); |
| 76 | if (status) { |
| 77 | LOGE("LocklessCommandFifo: error %i locking for condition.", status); |
Jason Sams | bfc7891 | 2011-08-12 15:05:15 -0700 | [diff] [blame] | 78 | return false; |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | if (!mSet) { |
Jason Sams | bfc7891 | 2011-08-12 15:05:15 -0700 | [diff] [blame] | 82 | if (!timeout) { |
| 83 | status = pthread_cond_wait(&mCondition, &mMutex); |
| 84 | } else { |
| 85 | #if defined(HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE) |
| 86 | status = pthread_cond_timeout_np(&mCondition, &mMutex, timeout / 1000000); |
| 87 | #else |
| 88 | // This is safe it will just make things less reponsive |
| 89 | status = pthread_cond_wait(&mCondition, &mMutex); |
| 90 | #endif |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 91 | } |
| 92 | } |
Jason Sams | bfc7891 | 2011-08-12 15:05:15 -0700 | [diff] [blame] | 93 | |
| 94 | if (!status) { |
| 95 | mSet = false; |
| 96 | ret = true; |
| 97 | } else { |
| 98 | if (status != ETIMEDOUT) { |
| 99 | LOGE("LocklessCommandFifo: error %i waiting for condition.", status); |
| 100 | } |
| 101 | } |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 102 | |
| 103 | status = pthread_mutex_unlock(&mMutex); |
| 104 | if (status) { |
| 105 | LOGE("LocklessCommandFifo: error %i unlocking for condition.", status); |
| 106 | } |
Jason Sams | bfc7891 | 2011-08-12 15:05:15 -0700 | [diff] [blame] | 107 | |
| 108 | return ret; |
Jason Sams | c1d726c | 2010-03-18 11:39:44 -0700 | [diff] [blame] | 109 | } |
| 110 | |