Added hipDeviceGetLimit api

1. hipDeviceGetLimit API for HCC path is added
2. Test for hipDeviceGetLimit API is added
3. The feature added only supports querying heap size
4. Corrected indents for malloc and free device functions
5. Removed redundant data structures
6. Added g_heap_malloc_size to store the heap size

Change-Id: If48d1b0ce9270e994f1c542cc283ddbb14746bbb

src/hip_device.cpp

@@ -68,7 +68,7 @@ hipError_t hipGetDeviceCount(int *count)
     return e;
 }
 
-hipError_t hipDeviceSetCacheConfig ( hipFuncCache cacheConfig )
+hipError_t hipDeviceSetCacheConfig(hipFuncCache cacheConfig)
 {
     HIP_INIT_API(cacheConfig);
 
@@ -77,7 +77,7 @@ hipError_t hipDeviceSetCacheConfig ( hipFuncCache cacheConfig )
     return ihipLogStatus(hipSuccess);
 }
 
-hipError_t hipDeviceGetCacheConfig ( hipFuncCache *cacheConfig )
+hipError_t hipDeviceGetCacheConfig(hipFuncCache *cacheConfig)
 {
     HIP_INIT_API(cacheConfig);
 
@@ -86,7 +86,23 @@ hipError_t hipDeviceGetCacheConfig ( hipFuncCache *cacheConfig )
     return ihipLogStatus(hipSuccess);
 }
 
-hipError_t hipFuncSetCacheConfig ( hipFuncCache cacheConfig )
+extern "C" size_t g_malloc_heap_size;
+
+hipError_t hipDeviceGetLimit (size_t *pValue, hipLimit limit)
+{
+    HIP_INIT_API(pValue, limit);
+    if(pValue == nullptr) {
+        return ihipLogStatus(hipErrorInvalidValue);
+    }
+    if(limit == hipLimitMallocHeapSize) {
+        *pValue = g_malloc_heap_size;
+        return ihipLogStatus(hipSuccess);
+    }else{
+        return ihipLogStatus(hipErrorUnsupportedLimit);
+    }
+}
+
+hipError_t hipFuncSetCacheConfig (hipFuncCache cacheConfig)
 {
     HIP_INIT_API(cacheConfig);
 
@@ -95,7 +111,7 @@ hipError_t hipFuncSetCacheConfig ( hipFuncCache cacheConfig )
     return ihipLogStatus(hipSuccess);
 }
 
-hipError_t hipDeviceSetSharedMemConfig ( hipSharedMemConfig config )
+hipError_t hipDeviceSetSharedMemConfig (hipSharedMemConfig config)
 {
     HIP_INIT_API(config);
 
@@ -104,7 +120,7 @@ hipError_t hipDeviceSetSharedMemConfig ( hipSharedMemConfig config )
     return ihipLogStatus(hipSuccess);
 }
 
-hipError_t hipDeviceGetSharedMemConfig ( hipSharedMemConfig * pConfig )
+hipError_t hipDeviceGetSharedMemConfig (hipSharedMemConfig *pConfig)
 {
     HIP_INIT_API(pConfig);