[GPU] Forwarding getMappedPtr changes to HIP

Author: noelchalmers

include/occa/mode/hip/memory.hpp

@@ -41,6 +41,8 @@ namespace occa {
                                      const udim_t bytes,
                                      const occa::properties &props);
 
+      friend void* getMappedPtr(occa::memory mem);
+
     public:
       hipDeviceptr_t hipPtr;
       char *mappedPtr;

include/occa/mode/hip/utils.hpp

@@ -96,6 +96,8 @@ namespace occa {
 
     hipCtx_t getContext(occa::device device);
 
+    void* getMappedPtr(occa::memory mem);
+
     occa::device wrapDevice(hipDevice_t device,
                             hipCtx_t context,
                             const occa::properties &props = occa::properties());

src/mode/hip/utils.cpp

@@ -177,6 +177,11 @@ namespace occa {
       return ((hip::device*) device.getModeDevice())->hipContext;
     }
 
+    void* getMappedPtr(occa::memory mem) {
+      hip::memory *handle = (hip::memory*) mem.getMHandle();
+      return handle ? handle->mappedPtr : NULL;
+    }
+
     occa::device wrapDevice(hipDevice_t device,
                             hipCtx_t context,
                             const occa::properties &props) {