Support to multi-threading and pthread interface (POSIX.1-2008) (#23)

[lunaix-os.git] / lunaix-os / kernel / mm / cake.c

diff --git a/lunaix-os/kernel/mm/cake.c b/lunaix-os/kernel/mm/cake.c
index 0e8f3341c5b8a95a23e47ba7925015aa1d0ab8b5..9503260ac26dc0522b2d9748e31b205a59647a27 100644 (file)
--- a/lunaix-os/kernel/mm/cake.c
+++ b/lunaix-os/kernel/mm/cake.c
@@ -28,7 +28,7 @@ struct llist_header piles = { .next = &piles, .prev = &piles };
 void*
 __alloc_cake(unsigned int cake_pg)
 {
-    ptr_t pa = (ptr_t)pmm_alloc_cpage(KERNEL_PID, cake_pg, 0);
+    ptr_t pa = (ptr_t)pmm_alloc_cpage(cake_pg, 0);
     if (!pa) {
         return NULL;
     }
@@ -77,14 +77,14 @@ __init_pile(struct cake_pile* pile,
     unsigned int offset = sizeof(long);
 
     // 默认每块儿蛋糕对齐到地址总线宽度
-    if ((options & PILE_CACHELINE)) {
+    if ((options & PILE_ALIGN_CACHE)) {
         // 对齐到128字节缓存行大小，主要用于DMA
         offset = CACHE_LINE_SIZE;
     }
 
     piece_size = ROUNDUP(piece_size, offset);
     *pile = (struct cake_pile){ .piece_size = piece_size,
-                                .cakes_count = 1,
+                                .cakes_count = 0,
                                 .pieces_per_cake =
                                   (pg_per_cake * PG_SIZE) /
                                   (piece_size + sizeof(piece_index_t)),
@@ -149,7 +149,7 @@ cake_grab(struct cake_pile* pile)
     pile->alloced_pieces++;
 
     llist_delete(&pos->cakes);
-    if (pos->next_free == EO_FREE_PIECE) {
+    if (pos->free_list[pos->next_free] == EO_FREE_PIECE) {
         llist_append(&pile->full, &pos->cakes);
     } else {
         llist_append(&pile->partial, &pos->cakes);
@@ -169,6 +169,7 @@ int
 cake_release(struct cake_pile* pile, void* area)
 {
     piece_index_t piece_index;
+    size_t dsize = 0;
     struct cake_s *pos, *n;
     struct llist_header* hdrs[2] = { &pile->full, &pile->partial };
 
@@ -178,7 +179,8 @@ cake_release(struct cake_pile* pile, void* area)
             if (pos->first_piece > area) {
                 continue;
             }
-            piece_index = (ptr_t)(area - pos->first_piece) / pile->piece_size;
+            dsize = (ptr_t)(area - pos->first_piece);
+            piece_index = dsize / pile->piece_size;
             if (piece_index < pile->pieces_per_cake) {
                 goto found;
             }
@@ -188,8 +190,12 @@ cake_release(struct cake_pile* pile, void* area)
     return 0;
 
 found:
+    assert(!(dsize % pile->piece_size));
     pos->free_list[piece_index] = pos->next_free;
     pos->next_free = piece_index;
+
+    assert_msg(pos->free_list[piece_index] != pos->next_free, "double free");
+
     pos->used_pieces--;
     pile->alloced_pieces--;
 
@@ -200,6 +206,8 @@ found:
         llist_append(&pile->partial, &pos->cakes);
     }
 
+    *((unsigned int*)area) = DEADCAKE_MARK;
+
     return 1;
 }