rcpp_framework/libs/brynet/net/CurrentThread.hpp

#pragma once

#include <brynet/base/Platform.hpp>

#ifdef BRYNET_PLATFORM_WINDOWS
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include <winsock2.h>
#elif defined BRYNET_PLATFORM_LINUX
#include <linux/unistd.h>
#include <sys/prctl.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
#elif defined BRYNET_PLATFORM_DARWIN
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>
#endif

#ifdef BRYNET_PLATFORM_WINDOWS
using THREAD_ID_TYPE = DWORD;
#elif defined BRYNET_PLATFORM_LINUX || defined BRYNET_PLATFORM_DARWIN
using THREAD_ID_TYPE = int;
#endif

static THREAD_ID_TYPE &tid() {
#ifdef BRYNET_PLATFORM_WINDOWS
	static __declspec(thread) THREAD_ID_TYPE cachedTid = 0;
#elif defined BRYNET_PLATFORM_LINUX || defined BRYNET_PLATFORM_DARWIN
	static __thread THREAD_ID_TYPE cachedTid = 0;
#endif

	if (cachedTid == 0) {
#ifdef BRYNET_PLATFORM_WINDOWS
		cachedTid = GetCurrentThreadId();
#elif defined BRYNET_PLATFORM_LINUX
		cachedTid = static_cast<pid_t>(::syscall(SYS_gettid));
#elif defined BRYNET_PLATFORM_DARWIN
		// warning: 'syscall' is deprecated:
		// first deprecated in macOS 10.12 - syscall(2) is unsupported;
		// please switch to a supported interface.
		uint64_t tid64;
		pthread_threadid_np(NULL, &tid64);
		cachedTid = (pid_t)tid64;
#endif
	}

	return cachedTid;
}