Add page_size to hat::system_info

CMakeLists.txt

@@ -47,9 +47,12 @@ set(LIBHAT_SRC
     src/Scanner.cpp
     src/System.cpp
 
+    src/os/unix/System.cpp
+
     src/os/win32/MemoryProtector.cpp
     src/os/win32/Process.cpp
     src/os/win32/Scanner.cpp
+    src/os/win32/System.cpp
 
     src/arch/x86/SSE.cpp
     src/arch/x86/AVX2.cpp

include/libhat/Scanner.hpp

@@ -116,9 +116,9 @@ namespace hat {
         enum class scan_mode {
             Auto,   // Picks a mode at runtime
             Single, // std::find + std::equal
-            SSE,    // x86 SSE 4.1
-            AVX2,   // x86 AVX2
-            AVX512, // x86 AVX512
+            SSE,    // x86/x64 SSE 4.1
+            AVX2,   // x86/x64 AVX2
+            AVX512, // x64 AVX512
         };
 
         class scan_context {

include/libhat/System.hpp

@@ -5,6 +5,8 @@
 
 namespace hat {
     struct system_info {
+        size_t page_size{};
+
         system_info(const system_info&) = delete;
         system_info& operator=(const system_info&) = delete;
         system_info(system_info&&) = delete;

src/System.cpp

@@ -2,8 +2,6 @@
 
 namespace hat {
 
-    system_info::system_info() {}
-
     const system_info_impl system_info_impl::instance{};
     const system_info_impl& get_system() {
         return system_info_impl::instance;

src/os/unix/System.cpp

@@ -0,0 +1,14 @@
+#include <libhat/Defines.hpp>
+#ifdef LIBHAT_UNIX
+
+#include <libhat/System.hpp>
+#include <unistd.h>
+
+namespace hat {
+
+    system_info::system_info() {
+        this->page_size = static_cast<size_t>(sysconf(_SC_PAGESIZE));
+    }
+}
+
+#endif

src/os/win32/System.cpp

@@ -0,0 +1,16 @@
+#include <libhat/Defines.hpp>
+#ifdef LIBHAT_WINDOWS
+
+#include <libhat/System.hpp>
+#include <Windows.h>
+
+namespace hat {
+
+    system_info::system_info() {
+        SYSTEM_INFO sysInfo;
+        GetSystemInfo(&sysInfo);
+        this->page_size = sysInfo.dwPageSize;
+    }
+}
+
+#endif