From a2671839daddfaaec63f43132854c606c556558a Mon Sep 17 00:00:00 2001
From: Steven Le Rouzic <steven.lerouzic@gmail.com>
Date: Fri, 5 Apr 2024 18:05:56 +0200
Subject: Add virtual memory API

---
 deimos/core/os_win32.cpp | 36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

(limited to 'deimos/core/os_win32.cpp')

diff --git a/deimos/core/os_win32.cpp b/deimos/core/os_win32.cpp
index 1c6b664..d848530 100644
--- a/deimos/core/os_win32.cpp
+++ b/deimos/core/os_win32.cpp
@@ -8,7 +8,7 @@
 namespace deimos
 {
 
-class Win32OsConsoleApiImpl : public OsConsoleApi
+class Win32ConsoleApiImpl : public OsConsoleApi
 {
     HANDLE m_stdout;
     HANDLE m_stderr;
@@ -24,7 +24,7 @@ class Win32OsConsoleApiImpl : public OsConsoleApi
     }
 
 public:
-    Win32OsConsoleApiImpl() :
+    Win32ConsoleApiImpl() :
         m_stdout{::GetStdHandle(STD_OUTPUT_HANDLE)},
         m_stderr{::GetStdHandle(STD_ERROR_HANDLE)}
     {}
@@ -35,7 +35,7 @@ public:
     }
 };
 
-class Win32OsDllApiImpl : public OsDllApi
+class Win32DllApiImpl : public OsDllApi
 {
 public:
     OsDll* Open(gsl::czstring name) override
@@ -49,16 +49,42 @@ public:
     }
 };
 
+class Win32VirtualMemoryApiImpl : public OsVirtualMemoryApi
+{
+public:
+    gsl::owner<void*> Map(int64_t size) override
+    {
+        return ::VirtualAlloc(nullptr, (SIZE_T)size, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);
+    }
+
+    void Unmap(gsl::owner<void*> ptr) override
+    {
+        ::VirtualFree(ptr, 0, MEM_RELEASE);
+    }
+
+    gsl::owner<void*> Reserve(int64_t size) override
+    {
+        return ::VirtualAlloc(nullptr, (SIZE_T)size, MEM_RESERVE, PAGE_READWRITE);
+    }
+
+    void Commit(void* ptr, int64_t size) override
+    {
+        ::VirtualAlloc(ptr, (SIZE_T)size, MEM_COMMIT, PAGE_READWRITE);
+    }
+};
+
 class Win32OsApiImpl : public OsApi
 {
-    Win32OsConsoleApiImpl m_console_api;
-    Win32OsDllApiImpl m_dll_api;
+    Win32ConsoleApiImpl m_console_api;
+    Win32DllApiImpl m_dll_api;
+    Win32VirtualMemoryApiImpl m_virtual_memory_api;
 
 public:
     Win32OsApiImpl()
     {
         console = &m_console_api;
         dll = &m_dll_api;
+        virtual_memory = &m_virtual_memory_api;
     }
 };
 
-- 
cgit