First implementation of hipCtxXXX functions

Change-Id: I4609cbe6bd90a1fff8655bff4fdd773864397aba

include/hcc_detail/hip_runtime_api.h

@@ -1053,6 +1053,16 @@ hipError_t hipInit(unsigned int flags) ;
 // TODO-ctx
 hipError_t hipCtxCreate(hipCtx_t *ctx, unsigned int flags,  hipDevice_t device);
 
+hipError_t hipCtxDestroy(hipCtx_t ctx);
+
+hipError_t hipCtxPopCurrent(hipCtx_t* ctx);
+
+hipError_t hipCtxPushCurrent(hipCtx_t ctx);
+
+hipError_t hipCtxSetCurrent(hipCtx_t ctx);
+
+hipError_t hipCtxGetCurrent(hipCtx_t* ctx);
+
 
 // TODO-ctx
 /**

include/hip_runtime_api.h

@@ -161,6 +161,7 @@ typedef enum hipError_t {
     ,hipErrorRuntimeOther             ///< HSA runtime call other than memory returned error.  Typically not seen in production systems.
     ,hipErrorHostMemoryAlreadyRegistered ///< Produced when trying to lock a page-locked memory.
     ,hipErrorHostMemoryNotRegistered  ///< Produced when trying to unlock a non-page-locked memory.
+    ,hipErrorInvalidContext           ///< Produced when input context is invalid.
     ,hipErrorTbd                      ///< Marker that more error codes are needed.
 } hipError_t;