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// Copyright (c) 2018-2022 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif
#include <string>
#include <thread>
#include <utility>
#if (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
#include <pthread.h>
#include <pthread_np.h>
#endif
#include <util/threadnames.h>
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
//! Set the thread's name at the process level. Does not affect the
//! internal name.
static void SetThreadName(const char* name)
{
#if defined(PR_SET_NAME)
// Only the first 15 characters are used (16 - NUL terminator)
::prctl(PR_SET_NAME, name, 0, 0, 0);
#elif (defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__))
pthread_set_name_np(pthread_self(), name);
#elif defined(MAC_OSX)
pthread_setname_np(name);
#else
// Prevent warnings for unused parameters...
(void)name;
#endif
}
// If we have thread_local, just keep thread ID and name in a thread_local
// global.
#if defined(HAVE_THREAD_LOCAL)
static thread_local std::string g_thread_name;
const std::string& util::ThreadGetInternalName() { return g_thread_name; }
//! Set the in-memory internal name for this thread. Does not affect the process
//! name.
static void SetInternalName(std::string name) { g_thread_name = std::move(name); }
// Without thread_local available, don't handle internal name at all.
#else
static const std::string empty_string;
const std::string& util::ThreadGetInternalName() { return empty_string; }
static void SetInternalName(std::string name) { }
#endif
void util::ThreadRename(std::string&& name)
{
SetThreadName(("b-" + name).c_str());
SetInternalName(std::move(name));
}
void util::ThreadSetInternalName(std::string&& name)
{
SetInternalName(std::move(name));
}
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