feat: IO polling for file descriptor

[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 a64b3ea6acf40f02098c3536076325e3dcfe120d..2a70ab76d823f7d09d6d62cbc08bc6e70f70372b 100644 (file)
--- a/lunaix-os/kernel/mm/cake.c
+++ b/lunaix-os/kernel/mm/cake.c
@@ -28,8 +28,11 @@ struct llist_header piles = { .next = &piles, .prev = &piles };
 void*
 __alloc_cake(unsigned int cake_pg)
 {
-    uintptr_t pa = pmm_alloc_cpage(KERNEL_PID, cake_pg, 0);
-    return vmm_vmap(pa, cake_pg * PG_SIZE, PG_PREM_RW);
+    ptr_t pa = (ptr_t)pmm_alloc_cpage(KERNEL_PID, cake_pg, 0);
+    if (!pa) {
+        return NULL;
+    }
+    return vmap(pa, cake_pg * PG_SIZE, PG_PREM_RW, 0);
 }
 
 struct cake_s*
@@ -37,12 +40,19 @@ __new_cake(struct cake_pile* pile)
 {
     struct cake_s* cake = __alloc_cake(pile->pg_per_cake);
 
-    int max_piece = pile->pieces_per_cake;
+    if (!cake) {
+        return NULL;
+    }
+
+    u32_t max_piece = pile->pieces_per_cake;
+
+    assert(max_piece);
 
-    cake->first_piece = (void*)((uintptr_t)cake + pile->offset);
+    cake->first_piece = (void*)((ptr_t)cake + pile->offset);
     cake->next_free = 0;
+    pile->cakes_count++;
 
-    piece_index_t* free_list = &cake->free_list;
+    piece_index_t* free_list = cake->free_list;
     for (size_t i = 0; i < max_piece - 1; i++) {
         free_list[i] = i + 1;
     }
@@ -60,10 +70,14 @@ __init_pile(struct cake_pile* pile,
             unsigned int pg_per_cake,
             int options)
 {
+    if (!pile) {
+        return;
+    }
+
     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;
     }
@@ -81,7 +95,7 @@ __init_pile(struct cake_pile* pile,
     pile->offset = ROUNDUP(sizeof(struct cake_s) + free_list_size, offset);
     pile->pieces_per_cake -= ICEIL((pile->offset - free_list_size), piece_size);
 
-    strncpy(&pile->pile_name, name, PILE_NAME_MAXLEN);
+    strncpy(pile->pile_name, name, PILE_NAME_MAXLEN);
 
     llist_init_head(&pile->free);
     llist_init_head(&pile->full);
@@ -108,6 +122,12 @@ cake_new_pile(char* name,
     return pile;
 }
 
+void
+cake_set_constructor(struct cake_pile* pile, pile_cb ctor)
+{
+    pile->ctor = ctor;
+}
+
 void*
 cake_grab(struct cake_pile* pile)
 {
@@ -120,6 +140,9 @@ cake_grab(struct cake_pile* pile)
         pos = list_entry(pile->free.next, typeof(*pos), cakes);
     }
 
+    if (!pos)
+        return NULL;
+
     piece_index_t found_index = pos->next_free;
     pos->next_free = pos->free_list[found_index];
     pos->used_pieces++;
@@ -132,8 +155,14 @@ cake_grab(struct cake_pile* pile)
         llist_append(&pile->partial, &pos->cakes);
     }
 
-    return (void*)((uintptr_t)pos->first_piece +
-                   found_index * pile->piece_size);
+    void* ptr =
+      (void*)((ptr_t)pos->first_piece + found_index * pile->piece_size);
+
+    if (pile->ctor) {
+        pile->ctor(pile, ptr);
+    }
+
+    return ptr;
 }
 
 int
@@ -149,8 +178,7 @@ cake_release(struct cake_pile* pile, void* area)
             if (pos->first_piece > area) {
                 continue;
             }
-            piece_index =
-              (uintptr_t)(area - pos->first_piece) / pile->piece_size;
+            piece_index = (ptr_t)(area - pos->first_piece) / pile->piece_size;
             if (piece_index < pile->pieces_per_cake) {
                 goto found;
             }
@@ -165,7 +193,7 @@ found:
     pos->used_pieces--;
     pile->alloced_pieces--;
 
-    llist_delete(pos);
+    llist_delete(&pos->cakes);
     if (!pos->used_pieces) {
         llist_append(&pile->free, &pos->cakes);
     } else {
@@ -176,18 +204,7 @@ found:
 }
 
 void
-cake_stats()
+cake_ctor_zeroing(struct cake_pile* pile, void* piece)
 {
-    kprintf(KDEBUG "<name> <cake> <pg/c> <p/c> <alloced>\n");
-
-    struct cake_pile *pos, *n;
-    llist_for_each(pos, n, &piles, piles)
-    {
-        kprintf("%s %d %d %d %d\n",
-                pos->pile_name,
-                pos->cakes_count,
-                pos->pg_per_cake,
-                pos->pieces_per_cake,
-                pos->alloced_pieces);
-    }
+    memset(piece, 0, pile->piece_size);
 }
\ No newline at end of file