//===-- HostThreadLinux.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/DataBuffer.h"
#include "lldb/Host/linux/HostThreadLinux.h"
#include "Plugins/Process/Linux/ProcFileReader.h"

#include "llvm/ADT/SmallVector.h"

#include <pthread.h>

using namespace lldb_private;

HostThreadLinux::HostThreadLinux()
    : HostThreadPosix()
{
}

HostThreadLinux::HostThreadLinux(lldb::thread_t thread)
    : HostThreadPosix(thread)
{
}

void
HostThreadLinux::SetName(lldb::thread_t thread, llvm::StringRef name)
{
#if (defined(__GLIBC__) && defined(_GNU_SOURCE)) || defined(__ANDROID__)
    ::pthread_setname_np(thread, name.data());
#else
    (void) thread;
    (void) name;
#endif
}

void
HostThreadLinux::GetName(lldb::thread_t thread, llvm::SmallVectorImpl<char> &name)
{
    // Read /proc/$TID/comm file.
    lldb::DataBufferSP buf_sp = process_linux::ProcFileReader::ReadIntoDataBuffer(thread, "comm");
    const char *comm_str = (const char *)buf_sp->GetBytes();
    const char *cr_str = ::strchr(comm_str, '\n');
    size_t length = cr_str ? (cr_str - comm_str) : strlen(comm_str);

    name.clear();
    name.append(comm_str, comm_str + length);
}