1 files changed, 62 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/sys/posix/PidFile.h b/qpid/cpp/src/qpid/sys/posix/PidFile.h
new file mode 100644
index 0000000000..fb19d407f4
--- /dev/null
+++ b/qpid/cpp/src/qpid/sys/posix/PidFile.h
@@ -0,0 +1,62 @@
+#ifndef _sys_PidFile_h
+#define _sys_PidFile_h
+
+/*
+ *
+ * Copyright (c) 2008 The Apache Software Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include "qpid/sys/LockFile.h"
+
+#include "qpid/CommonImportExport.h"
+#include "qpid/sys/IntegerTypes.h"
+
+#include <boost/noncopyable.hpp>
+#include <boost/shared_ptr.hpp>
+#include <string>
+
+namespace qpid {
+namespace sys {
+
+class PidFile : public LockFile
+{
+public:
+    QPID_COMMON_EXTERN PidFile(const std::string& path_, bool create);
+
+    /**
+     * Read the process ID from the lock file. This method assumes that
+     * if there is a process ID in the file, it was written there by
+     * writePid(); thus, it's at the start of the file.
+     *
+     * Throws an exception if there is an error reading the file.
+     *
+     * @returns The stored process ID. No validity check is done on it.
+     */
+    QPID_COMMON_EXTERN pid_t readPid(void) const;
+
+    /**
+     * Write the current process's ID to the lock file. It's written at
+     * the start of the file and will overwrite any other content that
+     * may be in the file.
+     *
+     * Throws an exception if the write fails.
+     */
+    QPID_COMMON_EXTERN void writePid(void);
+};
+ 
+}}   /* namespace qpid::sys */
+
+#endif /*!_sys_PidFile_h*/