| 1 | //===-- ProcessRunLock.cpp ------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _WIN32 |
| 10 | #include "lldb/Host/ProcessRunLock.h" |
| 11 | |
| 12 | namespace lldb_private { |
| 13 | |
| 14 | ProcessRunLock::ProcessRunLock() { |
| 15 | int err = ::pthread_rwlock_init(rwlock: &m_rwlock, attr: nullptr); |
| 16 | (void)err; |
| 17 | } |
| 18 | |
| 19 | ProcessRunLock::~ProcessRunLock() { |
| 20 | int err = ::pthread_rwlock_destroy(rwlock: &m_rwlock); |
| 21 | (void)err; |
| 22 | } |
| 23 | |
| 24 | bool ProcessRunLock::ReadTryLock() { |
| 25 | ::pthread_rwlock_rdlock(rwlock: &m_rwlock); |
| 26 | if (!m_running) { |
| 27 | // coverity[missing_unlock] |
| 28 | return true; |
| 29 | } |
| 30 | ::pthread_rwlock_unlock(rwlock: &m_rwlock); |
| 31 | return false; |
| 32 | } |
| 33 | |
| 34 | bool ProcessRunLock::ReadUnlock() { |
| 35 | return ::pthread_rwlock_unlock(rwlock: &m_rwlock) == 0; |
| 36 | } |
| 37 | |
| 38 | bool ProcessRunLock::SetRunning() { |
| 39 | ::pthread_rwlock_wrlock(rwlock: &m_rwlock); |
| 40 | m_running = true; |
| 41 | ::pthread_rwlock_unlock(rwlock: &m_rwlock); |
| 42 | return true; |
| 43 | } |
| 44 | |
| 45 | bool ProcessRunLock::TrySetRunning() { |
| 46 | bool r; |
| 47 | |
| 48 | if (::pthread_rwlock_trywrlock(rwlock: &m_rwlock) == 0) { |
| 49 | r = !m_running; |
| 50 | m_running = true; |
| 51 | ::pthread_rwlock_unlock(rwlock: &m_rwlock); |
| 52 | return r; |
| 53 | } |
| 54 | return false; |
| 55 | } |
| 56 | |
| 57 | bool ProcessRunLock::SetStopped() { |
| 58 | ::pthread_rwlock_wrlock(rwlock: &m_rwlock); |
| 59 | m_running = false; |
| 60 | ::pthread_rwlock_unlock(rwlock: &m_rwlock); |
| 61 | return true; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | #endif |
| 66 |