intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 113 insertions, 0 deletions

diff --git a/contrib/libs/poco/Foundation/include/Poco/SharedMemory.h b/contrib/libs/poco/Foundation/include/Poco/SharedMemory.h
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+++ b/contrib/libs/poco/Foundation/include/Poco/SharedMemory.h
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+//
+// SharedMemory.h
+//
+// Library: Foundation
+// Package: Processes
+// Module:  SharedMemory
+//
+// Definition of the SharedMemory class.
+//
+// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#ifndef Foundation_SharedMemory_INCLUDED
+#define Foundation_SharedMemory_INCLUDED
+
+
+#include "Poco/Foundation.h"
+#include <algorithm>
+#include <cstddef>
+
+
+namespace Poco {
+
+
+class SharedMemoryImpl;
+class File;
+
+
+class Foundation_API SharedMemory
+	/// Create and manage a shared memory object.
+	///
+	/// A SharedMemory object has value semantics, but
+	/// is implemented using a handle/implementation idiom.
+	/// Therefore, multiple SharedMemory objects can share
+	/// a single, reference counted SharedMemoryImpl object.
+{
+public:
+	enum AccessMode
+	{
+		AM_READ = 0,
+		AM_WRITE
+	};
+
+	SharedMemory();
+		/// Default constructor creates an unmapped SharedMemory object. 
+		/// No clients can connect to an unmapped SharedMemory object.
+
+	SharedMemory(const std::string& name, std::size_t size, AccessMode mode, const void* addrHint = 0, bool server = true);
+		/// Creates or connects to a shared memory object with the given name.
+		///
+		/// For maximum portability, name should be a valid Unix filename and not
+		/// contain any slashes or backslashes.
+		///
+		/// An address hint can be passed to the system, specifying the desired
+		/// start address of the shared memory area. Whether the hint
+		/// is actually honored is, however, up to the system. Windows platform
+		/// will generally ignore the hint.
+		///
+		/// If server is set to true, the shared memory region will be unlinked
+		/// by calling shm_unlink() (on POSIX platforms) when the SharedMemory object is destroyed.
+		/// The server parameter is ignored on Windows platforms.
+
+	SharedMemory(const File& file, AccessMode mode, const void* addrHint = 0);
+		/// Maps the entire contents of file into a shared memory segment.
+		///
+		/// An address hint can be passed to the system, specifying the desired
+		/// start address of the shared memory area. Whether the hint
+		/// is actually honored is, however, up to the system. Windows platform
+		/// will generally ignore the hint.
+
+	SharedMemory(const SharedMemory& other);
+		/// Creates a SharedMemory object by copying another one.
+
+	~SharedMemory();
+		/// Destroys the SharedMemory.
+
+	SharedMemory& operator = (const SharedMemory& other);
+		/// Assigns another SharedMemory object.
+
+	void swap(SharedMemory& other);
+		/// Swaps the SharedMemory object with another one.
+
+	char* begin() const;
+		/// Returns the start address of the shared memory segment.
+		/// Will be NULL for illegal segments.
+
+	char* end() const;
+		/// Returns the one-past-end end address of the shared memory segment. 
+		/// Will be NULL for illegal segments.
+
+private:
+	SharedMemoryImpl* _pImpl;
+};
+
+
+//
+// inlines
+//
+inline void SharedMemory::swap(SharedMemory& other)
+{
+	using std::swap;
+	swap(_pImpl, other._pImpl);
+}
+
+
+} // namespace Poco::Poco
+
+
+#endif // Foundation_SharedMemory_INCLUDED