From 057aaef5d4584ab25143885e9ae9bbc1b347c7e6 Mon Sep 17 00:00:00 2001
From: sbrandt <sbrandt@29311d96-e01e-0410-9327-a35deaab8ce9>
Date: Wed, 22 Jun 2005 04:44:26 +0000
Subject: [PATCH] *** empty log message ***

git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@332 29311d96-e01e-0410-9327-a35deaab8ce9
---
 ceph/common/Semaphore.h | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 ceph/common/Semaphore.h

diff --git a/ceph/common/Semaphore.h b/ceph/common/Semaphore.h
new file mode 100644
index 00000000000..f8821f7c686
--- /dev/null
+++ b/ceph/common/Semaphore.h
@@ -0,0 +1,37 @@
+#ifndef _Sem_Posix_
+#define _Sem_Posix_
+
+#include <cassert>
+
+class Semaphore
+{
+  Mutex m;
+  Cond c;
+  int count;
+
+  public:
+
+  Semaphore()
+  {
+    count = 0;
+  }
+
+  void Put()  { 
+    m.Lock();
+    count++;
+    c.Signal();
+    m.Unlock();
+  }
+
+  void Get() 
+  { 
+    m.Lock();
+    while(count <= 0) {
+      C.Wait(m);
+    }
+    count--;
+    m.Unlock();
+  }
+};
+
+#endif // !_Mutex_Posix_