llvm-project/lldb/source/Host/windows/HostThreadWindows.cpp

//===-- HostThreadWindows.cpp -----------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "lldb/Core/Error.h"

#include "lldb/Host/windows/windows.h"
#include "lldb/Host/windows/HostThreadWindows.h"

#include "llvm/ADT/STLExtras.h"

using namespace lldb;
using namespace lldb_private;

HostThreadWindows::HostThreadWindows()
    : HostNativeThreadBase()
    , m_owns_handle(true)
{
}

HostThreadWindows::HostThreadWindows(lldb::thread_t thread)
    : HostNativeThreadBase(thread)
    , m_owns_handle(true)
{
}

HostThreadWindows::~HostThreadWindows()
{
    Reset();
}

void
HostThreadWindows::SetOwnsHandle(bool owns)
{
    m_owns_handle = owns;
}

Error
HostThreadWindows::Join(lldb::thread_result_t *result)
{
    Error error;
    if (IsJoinable())
    {
        DWORD wait_result = ::WaitForSingleObject(m_thread, INFINITE);
        if (WAIT_OBJECT_0 == wait_result && result)
        {
            DWORD exit_code = 0;
            if (!::GetExitCodeThread(m_thread, &exit_code))
                *result = 0;
            *result = exit_code;
        }
        else if (WAIT_OBJECT_0 != wait_result)
            error.SetError(::GetLastError(), eErrorTypeWin32);
    }
    else
        error.SetError(ERROR_INVALID_HANDLE, eErrorTypeWin32);

    Reset ();
    return error;
}

Error
HostThreadWindows::Cancel()
{
    Error error;

    DWORD result = ::QueueUserAPC(::ExitThread, m_thread, 0);
    error.SetError(result, eErrorTypeWin32);
    return error;
}

lldb::tid_t
HostThreadWindows::GetThreadId() const
{
    return ::GetThreadId(m_thread);
}

void
HostThreadWindows::Reset()
{
    if (m_owns_handle && m_thread != LLDB_INVALID_HOST_THREAD)
        ::CloseHandle(m_thread);

    HostNativeThreadBase::Reset();
}