Get latest upstream changes from internal project

Source/OS/dn_os_posix.cpp

@@ -9,6 +9,8 @@
 #include <dirent.h> // readdir, opendir, closedir
 #include <sys/statvfs.h>
 #include <sys/mman.h>
+#include <stdlib.h> // realpath
+#include <unistd.h> // sysconf, readlink
 
 // NOTE: DN_OSMem
 static DN_U32 DN_OS_MemConvertPageToOSFlags_(DN_U32 protect)
@@ -241,6 +243,23 @@ DN_API DN_OSDiskSpace DN_OS_DiskSpace(DN_Str8 path)
   return result;
 }
 
+DN_API DN_OSMemoryInfo DN_OS_MemoryInfo()
+{
+  DN_OSMemoryInfo result = {};
+#if defined(DN_PLATFORM_POSIX)
+  long page_size   = sysconf(_SC_PAGESIZE);
+  long pages       = sysconf(_SC_PHYS_PAGES);
+  long avail_pages = sysconf(_SC_AVPHYS_PAGES);
+  if (page_size > 0 && pages > 0) {
+    result.success    = true;
+    result.total_phys = DN_Cast(DN_U64) pages * DN_Cast(DN_U64) page_size;
+    if (avail_pages > 0)
+      result.avail_phys = DN_Cast(DN_U64) avail_pages * DN_Cast(DN_U64) page_size;
+  }
+#endif
+  return result;
+}
+
 DN_API DN_Str8 DN_OS_ExePath(DN_Arena *arena)
 {
   DN_Str8 result = {};
@@ -597,6 +616,23 @@ DN_API bool DN_OS_PathDelete(DN_Str8 path)
   return result;
 }
 
+DN_API DN_OSPathResult DN_OS_PathCanonicalise(DN_Arena *arena, DN_Str8 path, DN_ErrSink *error)
+{
+  DN_OSPathResult result = {};
+  DN_TcScratch scratch   = DN_TcScratchBeginArena(&arena, 1);
+  DN_Str8 path_cstr      = DN_Str8FromStr8Arena(path, &scratch.arena); // Ensure null-terminated
+  char *resolved         = realpath(path_cstr.data, NULL);
+  if (resolved != NULL) {
+    result.success = true;
+    result.path    = DN_Str8FromCStr8Arena(resolved, arena);
+    free(resolved);  // realpath allocates with malloc
+  } else {
+    DN_ErrSinkAppendF(error, errno, "Failed to canonicalise path: %s", strerror(errno));
+  }
+  DN_TcScratchEnd(&scratch);
+  return result;
+}
+
 DN_API bool DN_OS_PathIsFile(DN_Str8 path)
 {
   bool result = false;
@@ -1277,14 +1313,20 @@ DN_API void DN_OS_ConditionVariableBroadcast(DN_OSConditionVariable *cv)
 DN_API DN_OSWindowMinimise DN_OS_WindowIsMinimised(DN_OSWindow *window)
 {
   (void)window;
+  #if defined(DN_PLATFORM_EMSCRIPTEN)
+  #else
   DN_AssertInvalidCodePath;
+  #endif
   return DN_OSWindowMinimise_No;
 }
 
 DN_API DN_OSWindowMaximise DN_OS_WindowIsMaximised(DN_OSWindow *window)
 {
   (void)window;
+  #if defined(DN_PLATFORM_EMSCRIPTEN)
+  #else
   DN_AssertInvalidCodePath;
+  #endif
   return DN_OSWindowMaximise_No;
 }
 
@@ -1292,32 +1334,47 @@ DN_API void DN_OS_WindowSetTitle(DN_OSWindow *window, DN_Str8 title)
 {
   (void)window;
   (void)title;
+  #if defined(DN_PLATFORM_EMSCRIPTEN)
+  #else
   DN_AssertInvalidCodePath;
+  #endif
 }
 
 DN_API void DN_OS_WindowShow(DN_OSWindow *window, DN_OSWindowShow show)
 {
   (void)window;
   (void)show;
+  #if defined(DN_PLATFORM_EMSCRIPTEN)
+  #else
   DN_AssertInvalidCodePath;
+  #endif
 }
 
 DN_API void DN_OS_WindowBringToFront(DN_OSWindow *window)
 {
   (void)window;
+  #if defined(DN_PLATFORM_EMSCRIPTEN)
+  #else
   DN_AssertInvalidCodePath;
+  #endif
 }
 
 DN_API void DN_OS_WindowFocus(DN_OSWindow *window)
 {
   (void)window;
+  #if defined(DN_PLATFORM_EMSCRIPTEN)
+  #else
   DN_AssertInvalidCodePath;
+  #endif
 }
 
 DN_API bool DN_OS_WindowIsFocused(DN_OSWindow *window)
 {
   (void)window;
+  #if defined(DN_PLATFORM_EMSCRIPTEN)
+  #else
   DN_AssertInvalidCodePath;
+  #endif
   return false;
 }