Commit 31280d92d1cfd31743ebde611ad48d92239ca9aa
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f3d54fc4
Add TAILQ_FOREACH_SAFE (Jan Kiszka)
Add TAILQ iterator that allows to safely remove elements while walking the list. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5798 c046a42c-6fe2-441c-8c8c-71466251a162
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sys-queue.h
| @@ -210,6 +210,11 @@ struct { \ | @@ -210,6 +210,11 @@ struct { \ | ||
| 210 | (var); \ | 210 | (var); \ |
| 211 | (var) = ((var)->field.tqe_next)) | 211 | (var) = ((var)->field.tqe_next)) |
| 212 | 212 | ||
| 213 | +#define TAILQ_FOREACH_SAFE(var, head, field, next_var) \ | ||
| 214 | + for ((var) = ((head)->tqh_first); \ | ||
| 215 | + (var) && ((next_var) = ((var)->field.tqe_next), 1); \ | ||
| 216 | + (var) = (next_var)) | ||
| 217 | + | ||
| 213 | #define TAILQ_FOREACH_REVERSE(var, head, headname, field) \ | 218 | #define TAILQ_FOREACH_REVERSE(var, head, headname, field) \ |
| 214 | for ((var) = (*(((struct headname *)((head)->tqh_last))->tqh_last)); \ | 219 | for ((var) = (*(((struct headname *)((head)->tqh_last))->tqh_last)); \ |
| 215 | (var); \ | 220 | (var); \ |