15ffd83dbSDimitry Andric //===-- ProcessRunLock.cpp ------------------------------------------------===//
20b57cec5SDimitry Andric //
30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
60b57cec5SDimitry Andric //
70b57cec5SDimitry Andric //===----------------------------------------------------------------------===//
80b57cec5SDimitry Andric 
90b57cec5SDimitry Andric #ifndef _WIN32
100b57cec5SDimitry Andric #include "lldb/Host/ProcessRunLock.h"
110b57cec5SDimitry Andric 
120b57cec5SDimitry Andric namespace lldb_private {
130b57cec5SDimitry Andric 
ProcessRunLock()14*5f7ddb14SDimitry Andric ProcessRunLock::ProcessRunLock() {
150b57cec5SDimitry Andric   int err = ::pthread_rwlock_init(&m_rwlock, nullptr);
160b57cec5SDimitry Andric   (void)err;
170b57cec5SDimitry Andric }
180b57cec5SDimitry Andric 
~ProcessRunLock()190b57cec5SDimitry Andric ProcessRunLock::~ProcessRunLock() {
200b57cec5SDimitry Andric   int err = ::pthread_rwlock_destroy(&m_rwlock);
210b57cec5SDimitry Andric   (void)err;
220b57cec5SDimitry Andric }
230b57cec5SDimitry Andric 
ReadTryLock()240b57cec5SDimitry Andric bool ProcessRunLock::ReadTryLock() {
250b57cec5SDimitry Andric   ::pthread_rwlock_rdlock(&m_rwlock);
260b57cec5SDimitry Andric   if (!m_running) {
270b57cec5SDimitry Andric     return true;
280b57cec5SDimitry Andric   }
290b57cec5SDimitry Andric   ::pthread_rwlock_unlock(&m_rwlock);
300b57cec5SDimitry Andric   return false;
310b57cec5SDimitry Andric }
320b57cec5SDimitry Andric 
ReadUnlock()330b57cec5SDimitry Andric bool ProcessRunLock::ReadUnlock() {
340b57cec5SDimitry Andric   return ::pthread_rwlock_unlock(&m_rwlock) == 0;
350b57cec5SDimitry Andric }
360b57cec5SDimitry Andric 
SetRunning()370b57cec5SDimitry Andric bool ProcessRunLock::SetRunning() {
380b57cec5SDimitry Andric   ::pthread_rwlock_wrlock(&m_rwlock);
390b57cec5SDimitry Andric   m_running = true;
400b57cec5SDimitry Andric   ::pthread_rwlock_unlock(&m_rwlock);
410b57cec5SDimitry Andric   return true;
420b57cec5SDimitry Andric }
430b57cec5SDimitry Andric 
TrySetRunning()440b57cec5SDimitry Andric bool ProcessRunLock::TrySetRunning() {
450b57cec5SDimitry Andric   bool r;
460b57cec5SDimitry Andric 
470b57cec5SDimitry Andric   if (::pthread_rwlock_trywrlock(&m_rwlock) == 0) {
480b57cec5SDimitry Andric     r = !m_running;
490b57cec5SDimitry Andric     m_running = true;
500b57cec5SDimitry Andric     ::pthread_rwlock_unlock(&m_rwlock);
510b57cec5SDimitry Andric     return r;
520b57cec5SDimitry Andric   }
530b57cec5SDimitry Andric   return false;
540b57cec5SDimitry Andric }
550b57cec5SDimitry Andric 
SetStopped()560b57cec5SDimitry Andric bool ProcessRunLock::SetStopped() {
570b57cec5SDimitry Andric   ::pthread_rwlock_wrlock(&m_rwlock);
580b57cec5SDimitry Andric   m_running = false;
590b57cec5SDimitry Andric   ::pthread_rwlock_unlock(&m_rwlock);
600b57cec5SDimitry Andric   return true;
610b57cec5SDimitry Andric }
620b57cec5SDimitry Andric }
630b57cec5SDimitry Andric 
640b57cec5SDimitry Andric #endif
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