Add UMF_MEM_MAP_SYNC for MAP_SYNC on Linux only

Signed-off-by: Lukasz Dorau <[email protected]>

Author: ldorau

include/umf/memory_provider.h

@@ -20,7 +20,8 @@ extern "C" {
 /// @brief Memory visibility mode
 typedef enum umf_memory_visibility_t {
     UMF_MEM_MAP_PRIVATE = 1, ///< private memory mapping
-    UMF_MEM_MAP_SHARED, ///< shared memory mapping (supported on Linux only)
+    UMF_MEM_MAP_SHARED,      ///< shared memory mapping (Linux only)
+    UMF_MEM_MAP_SYNC, ///< direct mapping of persistent memory (supported only for files supporting DAX, Linux only)
 } umf_memory_visibility_t;
 
 /// @brief Protection of the memory allocations

src/utils/utils_linux_common.c

@@ -31,6 +31,9 @@ utils_translate_mem_visibility_flag(umf_memory_visibility_t in_flag,
     case UMF_MEM_MAP_SHARED:
         *out_flag = MAP_SHARED;
         return UMF_RESULT_SUCCESS;
+    case UMF_MEM_MAP_SYNC:
+        *out_flag = MAP_SYNC;
+        return UMF_RESULT_SUCCESS;
     }
     return UMF_RESULT_ERROR_INVALID_ARGUMENT;
 }

src/utils/utils_macosx_common.c

@@ -23,6 +23,8 @@ utils_translate_mem_visibility_flag(umf_memory_visibility_t in_flag,
         return UMF_RESULT_SUCCESS;
     case UMF_MEM_MAP_SHARED:
         return UMF_RESULT_ERROR_NOT_SUPPORTED; // not supported on MacOSX
+    case UMF_MEM_MAP_SYNC:
+        return UMF_RESULT_ERROR_NOT_SUPPORTED; // not supported on MacOSX
     }
     return UMF_RESULT_ERROR_INVALID_ARGUMENT;
 }

src/utils/utils_windows_common.c

@@ -96,6 +96,8 @@ utils_translate_mem_visibility_flag(umf_memory_visibility_t in_flag,
         return UMF_RESULT_SUCCESS;
     case UMF_MEM_MAP_SHARED:
         return UMF_RESULT_ERROR_NOT_SUPPORTED; // not supported on Windows yet
+    case UMF_MEM_MAP_SYNC:
+        return UMF_RESULT_ERROR_NOT_SUPPORTED; // not supported on Windows yet
     }
     return UMF_RESULT_ERROR_INVALID_ARGUMENT;
 }