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| author | Kent Overstreet <kent.overstreet@gmail.com> | 2017-12-09 12:42:44 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-19 14:47:33 -0400 |
| commit | ced58fc7ab9f2d4b3d8aaeb859321a61aa884f66 (patch) | |
| tree | fd2da9f3daebf59fde2e2cf794355d21c7240d14 /include/linux/closure.h | |
| parent | bd0d22e41ecbc5247e5f6a423636df14dbb1bef2 (diff) | |
| download | lwn-ced58fc7ab9f2d4b3d8aaeb859321a61aa884f66.tar.gz lwn-ced58fc7ab9f2d4b3d8aaeb859321a61aa884f66.zip | |
closures: closure_wait_event()
Like wait_event() - except, because it uses closures and closure
waitlists it doesn't have the restriction on modifying task state inside
the condition check, like wait_event() does.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Acked-by: Coly Li <colyli@suse.de>
Diffstat (limited to 'include/linux/closure.h')
| -rw-r--r-- | include/linux/closure.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/closure.h b/include/linux/closure.h index 0ec9e7bc8d97..36b4a83f9b77 100644 --- a/include/linux/closure.h +++ b/include/linux/closure.h @@ -374,4 +374,26 @@ static inline void closure_call(struct closure *cl, closure_fn fn, continue_at_nobarrier(cl, fn, wq); } +#define __closure_wait_event(waitlist, _cond) \ +do { \ + struct closure cl; \ + \ + closure_init_stack(&cl); \ + \ + while (1) { \ + closure_wait(waitlist, &cl); \ + if (_cond) \ + break; \ + closure_sync(&cl); \ + } \ + closure_wake_up(waitlist); \ + closure_sync(&cl); \ +} while (0) + +#define closure_wait_event(waitlist, _cond) \ +do { \ + if (!(_cond)) \ + __closure_wait_event(waitlist, _cond); \ +} while (0) + #endif /* _LINUX_CLOSURE_H */ |