1 files changed, 123 insertions, 2 deletions
diff --git a/src/porting.cpp b/src/porting.cpp
index f8a2cca5c..84df15b30 100644
--- a/src/porting.cpp
+++ b/src/porting.cpp
@@ -1,6 +1,6 @@
 /*
-Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU Lesser General Public License as published by
@@ -131,6 +131,127 @@ void signal_handler_init(void)
 
 #endif
 
+
+/*
+	Multithreading support
+*/
+int getNumberOfProcessors() {
+#if defined(_SC_NPROCESSORS_ONLN)
+
+	return sysconf(_SC_NPROCESSORS_ONLN);
+
+#elif defined(__FreeBSD__) || defined(__APPLE__)
+
+	unsigned int len, count;
+	len = sizeof(count);
+	return sysctlbyname("hw.ncpu", &count, &len, NULL, 0);
+
+#elif defined(_GNU_SOURCE)
+
+	return get_nprocs();
+
+#elif defined(_WIN32)
+
+	SYSTEM_INFO sysinfo;
+	GetSystemInfo(&sysinfo);
+	return sysinfo.dwNumberOfProcessors;
+
+#elif defined(PTW32_VERSION) || defined(__hpux)
+
+	return pthread_num_processors_np();
+
+#else
+
+	return 1;
+
+#endif
+}
+
+
+bool threadBindToProcessor(threadid_t tid, int pnumber) {
+#if defined(_WIN32)
+
+	HANDLE hThread = OpenThread(THREAD_ALL_ACCESS, 0, tid);
+	if (!hThread)
+		return false;
+
+	bool success = SetThreadAffinityMask(hThread, 1 << pnumber) != 0;
+
+	CloseHandle(hThread);
+	return success;
+
+#elif (defined(__FreeBSD__) && (__FreeBSD_version >= 702106)) \
+	|| defined(__linux) || defined(linux)
+
+	cpu_set_t cpuset;
+
+	CPU_ZERO(&cpuset);
+	CPU_SET(pnumber, &cpuset);
+	return pthread_setaffinity_np(tid, sizeof(cpuset), &cpuset) == 0;
+
+#elif defined(__sun) || defined(sun)
+
+	return processor_bind(P_LWPID, MAKE_LWPID_PTHREAD(tid), 
+						pnumber, NULL) == 0;
+
+#elif defined(_AIX)
+	
+	return bindprocessor(BINDTHREAD, (tid_t)tid, pnumber) == 0;
+
+#elif defined(__hpux) || defined(hpux)
+
+	pthread_spu_t answer;
+
+	return pthread_processor_bind_np(PTHREAD_BIND_ADVISORY_NP,
+									&answer, pnumber, tid) == 0;
+	
+#elif defined(__APPLE__)
+
+	struct thread_affinity_policy tapol;
+	
+	thread_port_t threadport = pthread_mach_thread_np(tid);
+	tapol.affinity_tag = pnumber + 1;
+	return thread_policy_set(threadport, THREAD_AFFINITY_POLICY,
+			(thread_policy_t)&tapol, THREAD_AFFINITY_POLICY_COUNT) == KERN_SUCCESS;
+
+#else
+
+	return false;
+
+#endif
+}
+
+
+bool threadSetPriority(threadid_t tid, int prio) {
+#if defined(_WIN32)
+
+	HANDLE hThread = OpenThread(THREAD_ALL_ACCESS, 0, tid);
+	if (!hThread)
+		return false;
+
+	bool success = SetThreadPriority(hThread, prio) != 0;
+
+	CloseHandle(hThread);
+	return success;
+	
+#else
+
+	struct sched_param sparam;
+	int policy;
+	
+	if (pthread_getschedparam(tid, &policy, &sparam) != 0)
+		return false;
+		
+	int min = sched_get_priority_min(policy);
+	int max = sched_get_priority_max(policy);
+
+	sparam.sched_priority = min + prio * (max - min) / THREAD_PRIORITY_HIGHEST;
+	return pthread_setschedparam(tid, policy, &sparam) == 0;
+	
+#endif
+}
+
+
 /*
 	Path mangler
 */