take alignment in allocator

1 files changed, 11 insertions, 8 deletions

diff --git a/src/mem.hff b/src/mem.hff
index 7858f4d..d3dd634 100644
--- a/src/mem.hff
+++ b/src/mem.hff
@@ -23,18 +23,20 @@ struct Arena {
       a.r = r;
    }
 
-   fn allocf(a *void, n usize) *void {
+   fn allocf(a *void, n usize, align usize) *void {
       let a *Arena = a;
-      n = ALIGNUP(n, 16);
+      if a.r {
+         a.r.idx = ALIGNUP(a.r.idx, align);
+      }
       if n > ARENA_SIZE {
          a->addregion(n);
          return a.r.mem;
       } else if a.r == #null {
          a->addregion(ARENA_SIZE);
-         return allocf(a, n);         
+         return allocf(a, n, align);
       } else if n > a.r.siz - a.r.idx {
          a->addregion(ARENA_SIZE);
-         return allocf(a, n);         
+         return allocf(a, n, align);
       } else {
          let p = &a.r.mem[a.r.idx];
          a.r.idx += n;
@@ -52,12 +54,13 @@ struct Arena {
 
 struct Allocator {
    a *void,
-   allocf *fn(*void, usize) *void,
+   allocf *fn(*void, usize, usize) *void,
    freef *fn(*void, *void) void,
 
-   fn alloc(self *Allocator, n usize) *void {
+   fn alloc(self *Allocator, n usize, align usize) *void {
       if self.allocf {
-         return self.allocf(self.a, n);
+         let p = self.allocf(self.a, n, align);
+         return p;
       }
       return #null;
    }
@@ -69,4 +72,4 @@ struct Allocator {
    }
 }
 
-defmacro anew(a, T) [ ((a)->alloc(sizeof T)) ] 
+defmacro anew(a, T) [ ((a)->alloc(sizeof T, alignof T)) ]