From 14321c71b80507181f05b9b6c33e81ee3505c45b Mon Sep 17 00:00:00 2001
From: James Bulman <contact@bulmanator.com>
Date: Sat, 4 Oct 2025 00:56:55 +0100
Subject: [PATCH] Added virtual memory on Linux

---
 code/core/platform.h      |  2 ++
 code/os/core.c            |  2 ++
 code/os/impl/linux/core.c | 31 +++++++++++++++++++++++++++++++
 linux                     |  2 +-
 4 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 code/os/impl/linux/core.c

diff --git a/code/core/platform.h b/code/core/platform.h
index a6cbda1..5047a9f 100644
--- a/code/core/platform.h
+++ b/code/core/platform.h
@@ -71,6 +71,8 @@
 	#pragma warning(disable : 4201)
 #elif OS_LINUX
 	#include <dlfcn.h>
+	#include <sys/mman.h>
+	#include <unistd.h>
 #endif
 
 #endif  // LD_CORE_PLATFORM_H_
diff --git a/code/os/core.c b/code/os/core.c
index e442952..0ebb8a9 100644
--- a/code/os/core.c
+++ b/code/os/core.c
@@ -1,3 +1,5 @@
 #if OS_WINDOWS
 	#include "impl/windows/core.c"
+#elif OS_LINUX
+	#include "impl/linux/core.c"
 #endif
diff --git a/code/os/impl/linux/core.c b/code/os/impl/linux/core.c
new file mode 100644
index 0000000..1dd1cd9
--- /dev/null
+++ b/code/os/impl/linux/core.c
@@ -0,0 +1,31 @@
+U64 VM_PageSize() {
+	U64 result = getpagesize();
+	return result;
+}
+
+U64 VM_AllocationGranularity() {
+	U64 result = getpagesize();
+	return result;
+}
+
+void *VM_Reserve(U64 size) {
+	void *addr = mmap(0, size, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
+
+	void *result = (addr == MAP_FAILED) ? 0 : addr;
+	return result;
+}
+
+B32 VM_Commit(void *base, U64 size) {
+	B32 result = mprotect(base, size, PROT_READ | PROT_WRITE) == 0;
+	return result;
+}
+
+void VM_Decommit(void *base, U64 size) {
+	mprotect(base, size, PROT_NONE);
+}
+
+void VM_Release(void *base, U64 size) {
+	munmap(base, size);
+}
+
+
diff --git a/linux b/linux
index b44be73..2930c89 100755
--- a/linux
+++ b/linux
@@ -37,7 +37,7 @@ fi
 
 echo "[Building source]"
 
-COMPILER_OPTS="-Wall -Wno-missing-braces -I'deps/stb'"
+COMPILER_OPTS="-Wall -Wno-missing-braces -Wno-unused-function -I'deps/stb'"
 LINKER_OPTS="-lSDL3"
 
 if [[ $release == 1 ]]