From 2050c0e0576f05156f192aa4caf48834d2f28b14 Mon Sep 17 00:00:00 2001
From: fschildt <florian.schildt@protonmail.com>
Date: Fri, 22 Aug 2025 15:23:11 +0200
Subject: first commit

---
 src/os/linux/linux_memory.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 src/os/linux/linux_memory.c

(limited to 'src/os/linux/linux_memory.c')

diff --git a/src/os/linux/linux_memory.c b/src/os/linux/linux_memory.c
new file mode 100644
index 0000000..668604e
--- /dev/null
+++ b/src/os/linux/linux_memory.c
@@ -0,0 +1,38 @@
+#include <os/os.h>
+#include <basic/basic.h>
+
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/mman.h>
+
+b32
+os_memory_allocate(OSMemory *memory, size_t size)
+{
+    // @Performance: Keep the fd of /dev/zero open for the whole runtime?
+    int fd = open("/dev/zero", O_RDWR);
+    if (fd == -1) {
+        printf("open() failed: %s\n", strerror(errno));
+        return false;
+    }
+
+    void *address = mmap(0, size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
+    if (address == MAP_FAILED) {
+        printf("mmap failed\n");
+        return false;
+    }
+
+    close(fd);
+
+    memory->size = size;
+    memory->p = address;
+    return true;
+}
+
+void
+os_memory_free(OSMemory *memory)
+{
+    munmap(memory->p, memory->size);
+}
+
-- 
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