From 792ddeb80dc9ec38fa1531160dcbbd119a67751e Mon Sep 17 00:00:00 2001
From: rhuibertsjr <rhuibertsjr@gmail.com>
Date: Thu, 25 Apr 2024 19:33:44 +0200
Subject: [PATCH] Added: Win32 platform layer

---
 src/win32_platform.c | 34 ++++++++++++++++++++++++++++++++++
 src/win32_platform.h | 17 +++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 src/win32_platform.c
 create mode 100644 src/win32_platform.h

diff --git a/src/win32_platform.c b/src/win32_platform.c
new file mode 100644
index 0000000..bf0f9eb
--- /dev/null
+++ b/src/win32_platform.c
@@ -0,0 +1,34 @@
+
+internal void *
+platform_memory_reserve(u64 size)
+{
+  void *result = VirtualAlloc(0, size, MEM_RESERVE, PAGE_READWRITE);
+  return result;
+}
+
+internal b8
+platform_memory_commit(void *ptr, u64 size)
+{
+  b32 result = (VirtualAlloc(ptr, size, MEM_COMMIT, PAGE_READWRITE) != 0);
+  return result;
+}
+
+internal void
+platform_memory_decommit(void *ptr, u64 size)
+{
+  VirtualFree(ptr, size, MEM_DECOMMIT);
+};
+
+internal void
+platform_memory_release(void *ptr, u64 size)
+{
+  VirtualFree(ptr, 0, MEM_RELEASE);
+}
+
+internal u64
+platform_get_page_size(void)
+{
+  SYSTEM_INFO sysinfo = {0};
+  GetSystemInfo(&sysinfo);
+  return sysinfo.dwPageSize;
+}
diff --git a/src/win32_platform.h b/src/win32_platform.h
new file mode 100644
index 0000000..63e279a
--- /dev/null
+++ b/src/win32_platform.h
@@ -0,0 +1,17 @@
+#ifndef WIN32_PLATFORM_H
+#define WIN32_PLATFORM_H
+
+#undef internal
+#include <Windows.h>
+#define internal static
+
+//= rhjr: platform memory management
+
+internal void * platform_memory_reserve(u64 size);
+internal b8     platform_memory_commit(void *ptr, u64 size);
+internal void   platform_memory_decommit(void *ptr, u64 size);
+internal void   platform_memory_release(void *ptr, u64 size);
+
+internal u64    platform_get_page_size(void);
+
+#endif // WIN32_PLATFORM_H