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//===-- ProcessRunLock.cpp --------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/ProcessRunLock.h"
#include "lldb/Host/windows/windows.h"
static PSRWLOCK GetLock(lldb::rwlock_t lock) {
return static_cast<PSRWLOCK>(lock);
}
static bool ReadLock(lldb::rwlock_t rwlock) {
::AcquireSRWLockShared(GetLock(rwlock));
return true;
}
static bool ReadUnlock(lldb::rwlock_t rwlock) {
::ReleaseSRWLockShared(GetLock(rwlock));
return true;
}
static bool WriteLock(lldb::rwlock_t rwlock) {
::AcquireSRWLockExclusive(GetLock(rwlock));
return true;
}
static bool WriteTryLock(lldb::rwlock_t rwlock) {
return !!::TryAcquireSRWLockExclusive(GetLock(rwlock));
}
static bool WriteUnlock(lldb::rwlock_t rwlock) {
::ReleaseSRWLockExclusive(GetLock(rwlock));
return true;
}
using namespace lldb_private;
ProcessRunLock::ProcessRunLock() : m_running(false) {
m_rwlock = new SRWLOCK;
InitializeSRWLock(GetLock(m_rwlock));
}
ProcessRunLock::~ProcessRunLock() { delete static_cast<SRWLOCK *>(m_rwlock); }
bool ProcessRunLock::ReadTryLock() {
::ReadLock(m_rwlock);
if (m_running == false)
return true;
::ReadUnlock(m_rwlock);
return false;
}
bool ProcessRunLock::ReadUnlock() { return ::ReadUnlock(m_rwlock); }
bool ProcessRunLock::SetRunning() {
WriteLock(m_rwlock);
m_running = true;
WriteUnlock(m_rwlock);
return true;
}
bool ProcessRunLock::TrySetRunning() {
if (WriteTryLock(m_rwlock)) {
bool was_running = m_running;
m_running = true;
WriteUnlock(m_rwlock);
return !was_running;
}
return false;
}
bool ProcessRunLock::SetStopped() {
WriteLock(m_rwlock);
m_running = false;
WriteUnlock(m_rwlock);
return true;
}
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