diff options
| -rw-r--r-- | source/blender/blenlib/BLI_linklist_stack.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_linklist_stack.h b/source/blender/blenlib/BLI_linklist_stack.h index e9cf820c6c8..4562ce2487e 100644 --- a/source/blender/blenlib/BLI_linklist_stack.h +++ b/source/blender/blenlib/BLI_linklist_stack.h @@ -40,6 +40,15 @@ * \note _##var##_type is a dummy var only used for typechecks. */ +/* -------------------------------------------------------------------- */ +/* Linked Stack using BLI_mempool + * + * Uses mempool for storage. + */ + +/** \name Linked Stack (mempool) + * \{ */ + #define BLI_LINKSTACK_DECLARE(var, type) \ LinkNode *var; \ BLI_mempool *_##var##_pool; \ @@ -87,4 +96,64 @@ #include "BLI_linklist.h" #include "BLI_mempool.h" +/** \} */ + + +/* -------------------------------------------------------------------- */ +/* Linked Stack, using stack memory (alloca) + * + * alloca never frees, pop'd items are stored in a free-list for reuse. + * only use for lists small enough to fit on the stack. + */ + + +/** \name Linked Stack (alloca) + * \{ */ + +#ifdef __GNUC__ +# define _BLI_SMALLSTACK_CAST(var) typeof(_##var##_type) +#else +# define _BLI_SMALLSTACK_CAST(var) +#endif + +#define BLI_SMALLSTACK_DECLARE(var, type) \ + LinkNode *_##var##_stack = NULL, *_##var##_free = NULL, *_##var##_temp = NULL; \ + type _##var##_type + +#define BLI_SMALLSTACK_PUSH(var, data) \ +{ \ + CHECK_TYPE_PAIR(data, _##var##_type); \ + if (_##var##_free) { \ + _##var##_temp = _##var##_free; \ + _##var##_free = _##var##_free->next; \ + } \ + else { \ + _##var##_temp = alloca(sizeof(LinkNode)); \ + } \ + _##var##_temp->next = _##var##_stack; \ + _##var##_temp->link = data; \ + _##var##_stack = _##var##_temp; \ +} (void)0 + +/* internal use, no null check */ +#define _BLI_SMALLSTACK_DEL(var) \ + (void)((_##var##_temp = _##var##_stack->next), \ + (_##var##_stack->next = _##var##_free), \ + (_##var##_free = _##var##_stack), \ + (_##var##_stack = _##var##_temp)) \ + +/* check for typeof() */ +#define BLI_SMALLSTACK_POP(var) \ + (_BLI_SMALLSTACK_CAST(var)) ((_##var##_stack) ? \ + (_BLI_SMALLSTACK_DEL(var), (_##var##_free->link)) : NULL) + +#define BLI_SMALLSTACK_FREE(var) { \ + (void)&(_##var##_type); \ +} (void)0 + +#include "BLI_alloca.h" + +/** \} */ + #endif /* __BLI_LINKLIST_STACK_H__ */ + |