diff options
Diffstat (limited to 'libdrm_lists.h')
| -rw-r--r-- | libdrm_lists.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/libdrm_lists.h b/libdrm_lists.h new file mode 100644 index 0000000..7f55fc0 --- /dev/null +++ b/libdrm_lists.h @@ -0,0 +1,118 @@ +/************************************************************************** + * + * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND. USA. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR + * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE + * USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + */ + +/* + * List macros heavily inspired by the Linux kernel + * list handling. No list looping yet. + */ + +#include <stddef.h> + +typedef struct _drmMMListHead +{ + struct _drmMMListHead *prev; + struct _drmMMListHead *next; +} drmMMListHead; + +#define DRMINITLISTHEAD(__item) \ + do{ \ + (__item)->prev = (__item); \ + (__item)->next = (__item); \ + } while (0) + +#define DRMLISTADD(__item, __list) \ + do { \ + (__item)->prev = (__list); \ + (__item)->next = (__list)->next; \ + (__list)->next->prev = (__item); \ + (__list)->next = (__item); \ + } while (0) + +#define DRMLISTADDTAIL(__item, __list) \ + do { \ + (__item)->next = (__list); \ + (__item)->prev = (__list)->prev; \ + (__list)->prev->next = (__item); \ + (__list)->prev = (__item); \ + } while(0) + +#define DRMLISTDEL(__item) \ + do { \ + (__item)->prev->next = (__item)->next; \ + (__item)->next->prev = (__item)->prev; \ + } while(0) + +#define DRMLISTDELINIT(__item) \ + do { \ + (__item)->prev->next = (__item)->next; \ + (__item)->next->prev = (__item)->prev; \ + (__item)->next = (__item); \ + (__item)->prev = (__item); \ + } while(0) + +#define DRMLISTENTRY(__type, __item, __field) \ + ((__type *)(((char *) (__item)) - offsetof(__type, __field))) + +#define DRMLISTEMPTY(__item) ((__item)->next == (__item)) + +#define DRMLISTSINGLE(__list) \ + (!DRMLISTEMPTY(__list) && ((__list)->next == (__list)->prev)) + +#define DRMLISTFOREACH(__item, __list) \ + for ((__item) = (__list)->next; \ + (__item) != (__list); (__item) = (__item)->next) + +#define DRMLISTFOREACHSAFE(__item, __temp, __list) \ + for ((__item) = (__list)->next, (__temp) = (__item)->next; \ + (__item) != (__list); \ + (__item) = (__temp), (__temp) = (__item)->next) + +#define DRMLISTFOREACHSAFEREVERSE(__item, __temp, __list) \ + for ((__item) = (__list)->prev, (__temp) = (__item)->prev; \ + (__item) != (__list); \ + (__item) = (__temp), (__temp) = (__item)->prev) + +#define DRMLISTFOREACHENTRY(__item, __list, __head) \ + for ((__item) = DRMLISTENTRY(__typeof__(*__item), (__list)->next, __head); \ + &(__item)->__head != (__list); \ + (__item) = DRMLISTENTRY(__typeof__(*__item), \ + (__item)->__head.next, __head)) + +#define DRMLISTFOREACHENTRYSAFE(__item, __temp, __list, __head) \ + for ((__item) = DRMLISTENTRY(__typeof__(*__item), (__list)->next, __head), \ + (__temp) = DRMLISTENTRY(__typeof__(*__item), \ + (__item)->__head.next, __head); \ + &(__item)->__head != (__list); \ + (__item) = (__temp), \ + (__temp) = DRMLISTENTRY(__typeof__(*__item), \ + (__temp)->__head.next, __head)) + +#define DRMLISTJOIN(__list, __join) if (!DRMLISTEMPTY(__list)) { \ + (__list)->next->prev = (__join); \ + (__list)->prev->next = (__join)->next; \ + (__join)->next->prev = (__list)->prev; \ + (__join)->next = (__list)->next; \ +} |