2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
82 lines
1.9 KiB
C++
82 lines
1.9 KiB
C++
//===-- ProcessRunLock.cpp --------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/ProcessRunLock.h"
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#include "lldb/Host/windows/windows.h"
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static PSRWLOCK GetLock(lldb::rwlock_t lock) {
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return static_cast<PSRWLOCK>(lock);
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}
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static bool ReadLock(lldb::rwlock_t rwlock) {
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::AcquireSRWLockShared(GetLock(rwlock));
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return true;
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}
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static bool ReadUnlock(lldb::rwlock_t rwlock) {
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::ReleaseSRWLockShared(GetLock(rwlock));
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return true;
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}
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static bool WriteLock(lldb::rwlock_t rwlock) {
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::AcquireSRWLockExclusive(GetLock(rwlock));
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return true;
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}
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static bool WriteTryLock(lldb::rwlock_t rwlock) {
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return !!::TryAcquireSRWLockExclusive(GetLock(rwlock));
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}
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static bool WriteUnlock(lldb::rwlock_t rwlock) {
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::ReleaseSRWLockExclusive(GetLock(rwlock));
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return true;
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}
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using namespace lldb_private;
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ProcessRunLock::ProcessRunLock() : m_running(false) {
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m_rwlock = new SRWLOCK;
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InitializeSRWLock(GetLock(m_rwlock));
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}
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ProcessRunLock::~ProcessRunLock() { delete static_cast<SRWLOCK *>(m_rwlock); }
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bool ProcessRunLock::ReadTryLock() {
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::ReadLock(m_rwlock);
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if (m_running == false)
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return true;
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::ReadUnlock(m_rwlock);
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return false;
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}
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bool ProcessRunLock::ReadUnlock() { return ::ReadUnlock(m_rwlock); }
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bool ProcessRunLock::SetRunning() {
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WriteLock(m_rwlock);
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m_running = true;
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WriteUnlock(m_rwlock);
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return true;
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}
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bool ProcessRunLock::TrySetRunning() {
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if (WriteTryLock(m_rwlock)) {
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bool was_running = m_running;
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m_running = true;
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WriteUnlock(m_rwlock);
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return !was_running;
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}
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return false;
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}
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bool ProcessRunLock::SetStopped() {
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WriteLock(m_rwlock);
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m_running = false;
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WriteUnlock(m_rwlock);
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return true;
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}
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