Revision of Brian's threading support library to be a bit more generic and

platform independent.  This code is completely untested (but never used),
and needs autoconf support for detecting pthreads, but it's a start, and
deletes two emails from my inbox.  :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10906 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 41 insertions, 0 deletions

diff --git a/include/Support/ThreadSupport.h b/include/Support/ThreadSupport.h
new file mode 100644
index 0000000000..1a5f005f7c
--- /dev/null
+++ b/include/Support/ThreadSupport.h
@@ -0,0 +1,41 @@
+//===-- Support/ThreadSupport.h - Generic threading support -----*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file defines platform-agnostic interfaces that can be used to write
+// multi-threaded programs.  Autoconf is used to chose the correct
+// implementation of these interfaces, or default to a non-thread-capable system
+// if no matching system support is available.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUPPORT_THREADSUPPORT_H
+#define SUPPORT_THREADSUPPORT_H
+
+// FIXME: We need autoconf support to detect pthreads!
+#if 0
+#include "Support/ThreadSupport-PThreads.h"
+#else
+#include "Support/ThreadSupport-NoSupport.h"
+#endif // If no system support is available
+
+namespace llvm {
+  /// LockHolder - Instances of this class acquire a given Lock when constructed
+  /// and hold that lock until destruction.
+  ///
+  class MutexLocker {
+    Mutex &M;
+    MutexLocker(const LockHolder &);    // DO NOT IMPLEMENT
+    void operator=(const MutexLocker&); // DO NOT IMPLEMENT
+  public:
+    MutexLocker(Mutex &m) : M(m) { M.acquire(); }
+    ~MutexLocker() { M.release(); }
+  };
+}
+
+#endif // SUPPORT_THREADSUPPORT_H