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module builtin
fn mm_alloc(size u64) (&byte, Errno) {
// BEGIN CONSTS
// the constants need to be here, since the initialization of other constants,
// which happen before these ones would, require malloc
mem_prot := MemProt(int(MemProt.prot_read) | int(MemProt.prot_write))
map_flags := MapFlags(int(MapFlags.map_private) | int(MapFlags.map_anonymous))
// END CONSTS
a, e := sys_mmap(&byte(0), size + sizeof(u64), mem_prot, map_flags, -1, 0)
if e == .enoerror {
unsafe {
mut ap := &u64(a)
*ap = size
x2 := &byte(a + sizeof(u64))
return x2, e
}
}
return &byte(0), e
}
fn mm_free(addr &byte) Errno {
unsafe {
ap := &u64(addr - sizeof(u64))
size := *ap
return sys_munmap(addr - sizeof(u64), size + sizeof(u64))
}
}
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