From db2b2b38ecb4912e031d6585df47243fda7e81ab Mon Sep 17 00:00:00 2001
From: mutouyun <orz@orzz.org>
Date: Sun, 14 Aug 2022 22:01:49 +0800
Subject: [PATCH] add: [system] sys::conf page_size for win

---
 include/libimp/system.h            |  3 ++-
 src/libimp/platform/posix/system.h |  6 +++---
 src/libimp/platform/win/system.h   | 20 ++++++++++++++++++++
 3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/include/libimp/system.h b/include/libimp/system.h
index ba542d5..ceba407 100644
--- a/include/libimp/system.h
+++ b/include/libimp/system.h
@@ -7,6 +7,7 @@
 #pragma once
 
 #include <string>
+#include <cstdint>
 
 #include "libimp/def.h"
 #include "libimp/export.h"
@@ -27,7 +28,7 @@ LIBIMP_EXPORT void error_code(result_code) noexcept;
 LIBIMP_EXPORT std::string error_str(result_code) noexcept;
 
 /**
- * @brief @brief A text description string with an error number attached
+ * @brief A text description string with an error number attached
  */
 LIBIMP_EXPORT std::string error_msg(result_code) noexcept;
 
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
index 44d917a..a786ab4 100644
--- a/src/libimp/platform/posix/system.h
+++ b/src/libimp/platform/posix/system.h
@@ -60,10 +60,10 @@ std::int64_t conf(info r) noexcept {
   LIBIMP_LOG_();
   switch (r) {
   case info::page_size: {
-      auto val = ::sysconf(_SC_PAGESIZE);
-      if (val >= 0) return (std::int64_t)val;
-    }
+    auto val = ::sysconf(_SC_PAGESIZE);
+    if (val >= 0) return (std::int64_t)val;
     break;
+  }
   default:
     log.error("invalid info = {}", enum_cast(r));
     return -1;
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
index b50f2bc..d412a65 100644
--- a/src/libimp/platform/win/system.h
+++ b/src/libimp/platform/win/system.h
@@ -14,6 +14,7 @@
 #include "libimp/system.h"
 #include "libimp/log.h"
 #include "libimp/codecvt.h"
+#include "libimp/enum_cast.h"
 
 LIBIMP_NAMESPACE_BEG_
 namespace sys {
@@ -76,5 +77,24 @@ std::string error_str(result_code code) noexcept {
   return {};
 }
 
+/**
+ * @brief Retrieves information about the current system
+ * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
+ * https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
+ */
+std::int64_t conf(info r) noexcept {
+  LIBIMP_LOG_();
+  switch (r) {
+  case info::page_size: {
+    ::SYSTEM_INFO info {};
+    ::GetNativeSystemInfo(&info);
+    return (std::int64_t)info.dwPageSize;
+  }
+  default:
+    log.error("invalid info = {}", enum_cast(r));
+    return -1;
+  }
+}
+
 } // namespace sys
 LIBIMP_NAMESPACE_END_