System: Check host page size on startup

src/util/platform_misc_mac.mm

@@ -1,17 +1,19 @@
-// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
 // SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
 
+#include "metal_layer.h"
 #include "platform_misc.h"
 #include "window_info.h"
-#include "metal_layer.h"
 
 #include "common/log.h"
 #include "common/small_string.h"
 
-#include <IOKit/pwr_mgt/IOPMLib.h>
 #include <Cocoa/Cocoa.h>
+#include <IOKit/pwr_mgt/IOPMLib.h>
 #include <QuartzCore/QuartzCore.h>
 #include <cinttypes>
+#include <optional>
+#include <sys/sysctl.h>
 #include <vector>
 
 Log_SetChannel(PlatformMisc);
@@ -50,11 +52,11 @@ void PlatformMisc::SuspendScreensaver()
 {
   if (s_screensaver_suspended)
 
-  if (!SetScreensaverInhibitMacOS(true))
-  {
-    Log_ErrorPrintf("Failed to suspend screensaver.");
-    return;
-  }
+    if (!SetScreensaverInhibitMacOS(true))
+    {
+      Log_ErrorPrintf("Failed to suspend screensaver.");
+      return;
+    }
 
   s_screensaver_suspended = true;
 }
@@ -70,6 +72,27 @@ void PlatformMisc::ResumeScreensaver()
   s_screensaver_suspended = false;
 }
 
+template<typename T>
+static std::optional<T> sysctlbyname(const char* name)
+{
+  T output = 0;
+  size_t output_size = sizeof(output);
+  if (sysctlbyname(name, &output, &output_size, nullptr, 0) != 0)
+    return std::nullopt;
+
+  return output;
+}
+
+size_t PlatformMisc::GetRuntimePageSize()
+{
+  return sysctlbyname<u32>("hw.pagesize").value_or(0);
+}
+
+size_t PlatformMisc::GetRuntimeCacheLineSize()
+{
+  return static_cast<size_t>(std::max<s64>(sysctlbyname<s64>("hw.cachelinesize").value_or(0), 0));
+}
+
 bool PlatformMisc::PlaySoundAsync(const char* path)
 {
   NSString* nspath = [[NSString alloc] initWithUTF8String:path];
@@ -80,46 +103,44 @@ bool PlatformMisc::PlaySoundAsync(const char* path)
   return result;
 }
 
-bool CocoaTools::CreateMetalLayer(WindowInfo *wi)
+bool CocoaTools::CreateMetalLayer(WindowInfo* wi)
 {
   // Punt off to main thread if we're not calling from it already.
   if (![NSThread isMainThread])
   {
     bool ret;
-    dispatch_sync(dispatch_get_main_queue(), [&ret, wi]() {
-      ret = CreateMetalLayer(wi);
-    });
+    dispatch_sync(dispatch_get_main_queue(), [&ret, wi]() { ret = CreateMetalLayer(wi); });
     return ret;
   }
-  
+
   CAMetalLayer* layer = [CAMetalLayer layer];
   if (layer == nil)
   {
     Log_ErrorPrint("Failed to create CAMetalLayer");
     return false;
   }
-  
+
   NSView* view = (__bridge NSView*)wi->window_handle;
   [view setWantsLayer:TRUE];
   [view setLayer:layer];
   [layer setContentsScale:[[[view window] screen] backingScaleFactor]];
-  
+
   wi->surface_handle = (__bridge void*)layer;
   return true;
 }
 
-void CocoaTools::DestroyMetalLayer(WindowInfo *wi)
+void CocoaTools::DestroyMetalLayer(WindowInfo* wi)
 {
   if (!wi->surface_handle)
     return;
-  
+
   // Punt off to main thread if we're not calling from it already.
   if (![NSThread isMainThread])
   {
     dispatch_sync(dispatch_get_main_queue(), [wi]() { DestroyMetalLayer(wi); });
     return;
   }
-  
+
   NSView* view = (__bridge NSView*)wi->window_handle;
   CAMetalLayer* layer = (__bridge CAMetalLayer*)wi->surface_handle;
   [view setLayer:nil];