Add option to disable mmap (switch has no mmap)

CommitteeOfZero · Nov 4, 2024 · 21cfd21 · 21cfd21
1 parent c31b3ba
commit 21cfd21
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Showing 3 changed files with 25 additions and 9 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -260,7 +260,6 @@ set(Impacto_Src
         src/io/vfs.cpp
         src/io/assetpath.cpp
         src/io/memorystream.cpp
-        src/io/memorymappedfilestream.cpp
         src/io/physicalfilestream.cpp
         src/io/uncompressedstream.cpp
         src/io/zlibstream.cpp
@@ -572,7 +571,6 @@ set(Impacto_Header
         src/io/stream.h
         src/io/vfsarchive.h
         src/io/memorystream.h
-        src/io/memorymappedfilestream.h
         src/io/physicalfilestream.h
         src/io/uncompressedstream.h
         src/io/zlibstream.h
@@ -622,11 +620,10 @@ set(Impacto_Header
 
         vendor/squish/squish.h
 
-        vendor/mio/mio.hpp
-
+
         vendor/vma/vk_mem_alloc.h
         vendor/minilua/minilua.h
-)
+        )
 
 if (WIN32)
     list(APPEND Impacto_Src
@@ -637,6 +634,7 @@ endif ()
 if (NX OR EMSCRIPTEN)
     set(IMPACTO_DISABLE_VULKAN ON)
     set(IMPACTO_DISABLE_DX9 ON)
+    set(IMPACTO_DISABLE_MMAP ON)
 endif ()
 
 if(ANDROID)
@@ -715,6 +713,16 @@ FetchContent_MakeAvailable(fmt)
 FetchContent_MakeAvailable(pugixml)
 FetchContent_MakeAvailable(utf8cpp)
 
+if (NOT DEFINED IMPACTO_DISABLE_MMAP)
+    list(APPEND Impacto_Src
+        src/io/memorymappedfilestream.cpp
+    )
+    list(APPEND Impacto_Header
+        src/io/memorymappedfilestream.h
+        vendor/mio/mio.hpp
+    )
+endif ()
+
 if (NOT DEFINED IMPACTO_DISABLE_IMGUI)
     FetchContent_Declare(
             ImGui

diff --git a/src/config.h.in b/src/config.h.in
@@ -10,4 +10,5 @@
 #cmakedefine IMPACTO_DISABLE_FFMPEG
 #cmakedefine IMPACTO_DISABLE_OPENAL
 #cmakedefine IMPACTO_DISABLE_MSPACK
-#cmakedefine IMPACTO_DISABLE_IMGUI
+#cmakedefine IMPACTO_DISABLE_IMGUI
+#cmakedefine IMPACTO_DISABLE_MMAP
diff --git a/src/io/vfs.cpp b/src/io/vfs.cpp
@@ -2,10 +2,14 @@
 #include "../impacto.h"
 #include <vector>
 #include "vfsarchive.h"
-#include "memorymappedfilestream.h"
 #include "memorystream.h"
 #include "../log.h"
 #include "../profile/vfs.h"
+#ifndef IMPACTO_DISABLE_MMAP 
+#include "memorymappedfilestream.h"
+#else
+#include "physicalfilestream.h"
+#endif
 
 #include "afsarchive.h"
 #include "cpkarchive.h"
@@ -76,8 +80,11 @@ IoError VfsMount(std::string const& mountpoint,
   }
 
   Stream* archiveFile;
-  err = MemoryMappedFileStream<AccessMode::read>::Create(archiveFileName,
-                                                         &archiveFile);
+  #ifndef IMPACTO_DISABLE_MMAP
+  err = MemoryMappedFileStream<AccessMode::read>::Create(archiveFileName, &archiveFile);
+  #else 
+  err = PhysicalFileStream::Create(archiveFileName, &archiveFile);
+  #endif
   if (err != IoError_OK) {
     ImpLog(LL_Debug, LC_IO, "Could not open physical file \"%s\"\n",
            archiveFileName.c_str());