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82 lines
1.9 KiB
82 lines
1.9 KiB
4 months ago
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//===-- ProcessRunLock.cpp ------------------------------------------------===//
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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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