Switch matrix parallel to task stealing, type and wrap are refacored, thread execution core has not yet

StgSharp.Native/sn-src/t.affinity.c

@@ -0,0 +1,31 @@
+#include "sn_target.h"
+#include "StgSharpNative.h"
+
+#if SN_IS_OS(SN_OS_LINUX)
+#define _GNU_SOURCE
+#include <pthread.h>
+#include <sched.h>
+#endif
+
+/* Pin the calling thread to a single logical processor.
+ * core_id: zero-based logical processor index.
+ * Silently ignored if core_id is out of range or the OS call fails. */
+SN_API void SN_DECL sn_set_thread_affinity(int core_id)
+{
+        if (core_id < 0)
+                return;
+
+#if SN_IS_OS(SN_OS_WINDOWS)
+        /* windows.h already included via sn_internal.h */
+        if (core_id >= 64)
+                return;
+        DWORD_PTR mask = (DWORD_PTR)1 << core_id;
+        SetThreadAffinityMask(GetCurrentThread(), mask);
+
+#elif SN_IS_OS(SN_OS_LINUX)
+        cpu_set_t set;
+        CPU_ZERO(&set);
+        CPU_SET(core_id, &set);
+        pthread_setaffinity_np(pthread_self(), sizeof(set), &set);
+#endif
+}