1 files changed, 80 insertions, 0 deletions
diff --git a/include/git2/thread-utils.h b/include/git2/thread-utils.h
new file mode 100644
index 000000000..c45a76e95
--- /dev/null
+++ b/include/git2/thread-utils.h
@@ -0,0 +1,80 @@
+/*
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2,
+ * as published by the Free Software Foundation.
+ *
+ * In addition to the permissions in the GNU General Public License,
+ * the authors give you unlimited permission to link the compiled
+ * version of this file into combinations with other programs,
+ * and to distribute those combinations without any restriction
+ * coming from the use of this file.  (The General Public License
+ * restrictions do apply in other respects; for example, they cover
+ * modification of the file, and distribution when not linked into
+ * a combined executable.)
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#ifndef INCLUDE_git_thread_utils_h__
+#define INCLUDE_git_thread_utils_h__
+
+/*
+ * How TLS works is compiler+platform dependant
+ * Sources: http://en.wikipedia.org/wiki/Thread-Specific_Storage
+ *          http://predef.sourceforge.net/precomp.html
+ */
+
+#define GIT_HAS_TLS 1
+#define GIT_HAS_PTHREAD 1
+
+#if defined(__APPLE__) && defined(__MACH__)
+# undef GIT_TLS
+
+#elif defined(__GNUC__) || \
+      defined(__SUNPRO_C) || \
+      defined(__SUNPRO_CC) || \
+      defined(__xlc__) || \
+      defined(__xlC__)
+# define GIT_TLS __thread
+
+#elif defined(__INTEL_COMPILER)
+# if defined(_WIN32) || defined(_WIN32_CE)
+#  define GIT_TLS __declspec(thread)
+#  undef GIT_HAS_PTHREAD
+# else
+#  define GIT_TLS __thread
+# endif
+
+#elif defined(_WIN32) || \
+      defined(_WIN32_CE) || \
+      defined(__BORLANDC__)
+# define GIT_TLS __declspec(thread)
+# undef GIT_HAS_PTHREAD
+
+#else
+# undef GIT_HAS_TLS
+# undef GIT_HAS_PTHREAD
+# define GIT_TLS /* nothing: tls vars are thread-global */
+#endif
+
+/* sparse and cygwin don't grok thread-local variables */
+#if defined(__CHECKER__) || defined(__CYGWIN__)
+# undef GIT_HAS_TLS
+# undef GIT_TLS
+# define GIT_TLS
+#endif
+
+#ifdef GIT_HAS_PTHREAD
+# define GIT_THREADS 1
+#else
+# undef GIT_THREADS
+#endif
+
+#endif /* INCLUDE_git_thread_utils_h__ */