Update to Fast LZMA2 1.0.0

C/fast-lzma2/fl2_threading.c

@@ -0,0 +1,95 @@
+/**
+ * Copyright (c) 2016 Tino Reichardt
+ * All rights reserved.
+ *
+ * This source code is licensed under both the BSD-style license (found in the
+ * LICENSE file in the root directory of this source tree) and the GPLv2 (found
+ * in the COPYING file in the root directory of this source tree).
+ *
+ * You can contact the author at:
+ * - zstdmt source repository: https://github.com/mcmilk/zstdmt
+ */
+
+/**
+ * This file will hold wrapper for systems, which do not support pthreads
+ */
+
+/* create fake symbol to avoid empty translation unit warning */
+int g_ZSTD_threading_useles_symbol;
+
+#include "fast-lzma2.h"
+#include "fl2_threading.h"
+#include "util.h"
+
+#if !defined(FL2_SINGLETHREAD) && defined(_WIN32)
+
+/**
+ * Windows minimalist Pthread Wrapper, based on :
+ * http://www.cse.wustl.edu/~schmidt/win32-cv-1.html
+ */
+
+
+/* ===  Dependencies  === */
+#include <process.h>
+#include <errno.h>
+
+
+/* ===  Implementation  === */
+
+static unsigned __stdcall worker(void *arg)
+{
+    FL2_pthread_t* const thread = (FL2_pthread_t*) arg;
+    thread->arg = thread->start_routine(thread->arg);
+    return 0;
+}
+
+int FL2_pthread_create(FL2_pthread_t* thread, const void* unused,
+            void* (*start_routine) (void*), void* arg)
+{
+    (void)unused;
+    thread->arg = arg;
+    thread->start_routine = start_routine;
+    thread->handle = (HANDLE) _beginthreadex(NULL, 0, worker, thread, 0, NULL);
+
+    if (!thread->handle)
+        return errno;
+    else
+        return 0;
+}
+
+int FL2_pthread_join(FL2_pthread_t thread, void **value_ptr)
+{
+    DWORD result;
+
+    if (!thread.handle) return 0;
+
+    result = WaitForSingleObject(thread.handle, INFINITE);
+    switch (result) {
+    case WAIT_OBJECT_0:
+        if (value_ptr) *value_ptr = thread.arg;
+        return 0;
+    case WAIT_ABANDONED:
+        return EINVAL;
+    default:
+        return GetLastError();
+    }
+}
+
+#endif   /* FL2_SINGLETHREAD */
+
+unsigned FL2_checkNbThreads(unsigned nbThreads)
+{
+#ifndef FL2_SINGLETHREAD
+    if (nbThreads == 0) {
+        nbThreads = UTIL_countPhysicalCores();
+        nbThreads += !nbThreads;
+    }
+    if (nbThreads > FL2_MAXTHREADS) {
+        nbThreads = FL2_MAXTHREADS;
+    }
+#else
+    nbThreads = 1;
+#endif
+    return nbThreads;
+}
+