arceos_posix_api/imp/
sys.rs1use core::ffi::{c_int, c_long};
2
3use crate::ctypes;
4
5const PAGE_SIZE_4K: usize = 4096;
6
7pub fn sys_sysconf(name: c_int) -> c_long {
11 debug!("sys_sysconf <= {}", name);
12
13 #[cfg(feature = "alloc")]
14 let (phys_pages, avail_pages) = {
15 let alloc = axalloc::global_allocator();
16 let avail_pages = alloc.available_pages();
17 (alloc.used_pages() + avail_pages, avail_pages)
18 };
19
20 #[cfg(not(feature = "alloc"))]
21 let (phys_pages, avail_pages) = {
22 let mem_size = axconfig::plat::PHYS_MEMORY_SIZE;
23 (mem_size / PAGE_SIZE_4K, mem_size / PAGE_SIZE_4K) };
25
26 syscall_body!(sys_sysconf, {
27 match name as u32 {
28 ctypes::_SC_PAGE_SIZE => Ok(PAGE_SIZE_4K),
30 ctypes::_SC_NPROCESSORS_ONLN => Ok(axconfig::SMP),
32 ctypes::_SC_PHYS_PAGES => Ok(phys_pages),
34 ctypes::_SC_AVPHYS_PAGES => Ok(avail_pages),
36 #[cfg(feature = "fd")]
38 ctypes::_SC_OPEN_MAX => Ok(super::fd_ops::AX_FILE_LIMIT),
39 _ => Ok(0),
40 }
41 })
42}