Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurityd / lib / SharedMemoryClient.h

diff --git a/Security/libsecurityd/lib/SharedMemoryClient.h b/Security/libsecurityd/lib/SharedMemoryClient.h
new file mode 100644 (file)
index 0000000..b24b73b
--- /dev/null
+++ b/Security/libsecurityd/lib/SharedMemoryClient.h
@@ -0,0 +1,46 @@
+#ifndef __SHAREDMEMORYCLIENT__
+#define __SHAREDMEMORYCLIENT__
+
+
+
+#include <string>
+#include <stdlib.h>
+#include <securityd_client/SharedMemoryCommon.h>
+#include <security_utilities/threading.h>
+
+namespace Security
+{
+
+enum UnavailableReason {kURNone, kURMessageDropped, kURMessagePending, kURNoMessage, kURBufferCorrupt};
+
+class SharedMemoryClient
+{
+protected:
+       std::string mSegmentName;
+       size_t mSegmentSize;
+       Mutex mMutex;
+       
+       u_int8_t* mSegment;
+       u_int8_t* mDataArea;
+       u_int8_t* mDataPtr;
+       u_int8_t* mDataMax;
+       
+       SegmentOffsetType GetProducerCount ();
+       
+       void ReadData (void* buffer, SegmentOffsetType bytesToRead);
+       SegmentOffsetType ReadOffset ();
+       
+public:
+       SharedMemoryClient (const char* segmentName, SegmentOffsetType segmentSize);
+       virtual ~SharedMemoryClient ();
+       
+       bool ReadMessage (void* message, SegmentOffsetType &length, UnavailableReason &ur);
+       
+       const char* GetSegmentName ();
+       size_t GetSegmentSize ();
+};
+
+};
+
+
+#endif